Arai, Ina, Nagano, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Arai, Ina, Nagano, Japan
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
3rd Aug 2024
58AQILowest AQI recorded on
27th Aug 2024
9AQISame Day Analysis (7th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 26 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 6th Aug - 7th Aug 2026
Arai, Ina, Nagano, Japan
AQI
Day
Night
.
4 AM6th Aug 2026
7 PM
3 AM7th Aug 2026
Day time
Avg. Highest Time
5AM6th Aug
42AQI
Avg. Lowest Time
5PM6th Aug
29AQI
Night time
Avg. Highest Time
7PM6th Aug
33AQI
Avg. Lowest Time
3AM7th Aug
29AQI
In the last 24 hours,
Arai's AQI reached its highest point of 42 at 5 AM during the Day, while the lowest point, 29, was recorded at 3 AM during the Night between 6th Aug and 7th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Arai, Ina, Nagano, Japan
JulAug
09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th
Day
Night
9th Jul 2026264 AMAQI
9th Jul 2026285 AMAQI
9th Jul 2026246 AMAQI
9th Jul 2026207 AMAQI
9th Jul 2026248 AMAQI
9th Jul 2026219 AMAQI
9th Jul 20262110 AMAQI
9th Jul 20262011 AMAQI
9th Jul 20262012 PMAQI
9th Jul 2026181 PMAQI
9th Jul 2026222 PMAQI
9th Jul 2026203 PMAQI
9th Jul 2026244 PMAQI
9th Jul 2026265 PMAQI
9th Jul 2026226 PMAQI
9th Jul 2026247 PMAQI
9th Jul 2026268 PMAQI
9th Jul 2026269 PMAQI
9th Jul 20263010 PMAQI
9th Jul 20263111 PMAQI
10th Jul 20263012 AMAQI
10th Jul 2026291 AMAQI
10th Jul 2026272 AMAQI
10th Jul 2026303 AMAQI
23°C17/31°C
10th Jul 2026244 AMAQI
10th Jul 2026265 AMAQI
10th Jul 2026286 AMAQI
10th Jul 2026567 AMAQI
10th Jul 2026558 AMAQI
10th Jul 2026599 AMAQI
10th Jul 20263010 AMAQI
10th Jul 20262811 AMAQI
10th Jul 20262812 PMAQI
10th Jul 2026261 PMAQI
10th Jul 2026242 PMAQI
10th Jul 2026243 PMAQI
10th Jul 2026264 PMAQI
10th Jul 2026315 PMAQI
10th Jul 2026306 PMAQI
10th Jul 2026307 PMAQI
10th Jul 2026308 PMAQI
10th Jul 2026309 PMAQI
10th Jul 20263410 PMAQI
10th Jul 20263211 PMAQI
11th Jul 20263112 AMAQI
11th Jul 2026321 AMAQI
11th Jul 2026322 AMAQI
11th Jul 2026303 AMAQI
22°C14/32°C
11th Jul 2026284 AMAQI
11th Jul 2026305 AMAQI
11th Jul 2026326 AMAQI
11th Jul 2026327 AMAQI
11th Jul 2026308 AMAQI
11th Jul 2026349 AMAQI
11th Jul 20263610 AMAQI
11th Jul 20263011 AMAQI
11th Jul 20262812 PMAQI
11th Jul 2026281 PMAQI
11th Jul 2026242 PMAQI
11th Jul 2026243 PMAQI
11th Jul 2026264 PMAQI
11th Jul 2026305 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026287 PMAQI
11th Jul 2026248 PMAQI
11th Jul 2026289 PMAQI
11th Jul 20263010 PMAQI
11th Jul 20263011 PMAQI
12th Jul 20263112 AMAQI
12th Jul 2026301 AMAQI
12th Jul 2026312 AMAQI
12th Jul 2026303 AMAQI
22°C14/30°C
12th Jul 2026284 AMAQI
12th Jul 2026285 AMAQI
12th Jul 2026306 AMAQI
12th Jul 2026287 AMAQI
12th Jul 2026308 AMAQI
12th Jul 2026289 AMAQI
12th Jul 20263110 AMAQI
12th Jul 20263611 AMAQI
12th Jul 20264212 PMAQI
12th Jul 2026311 PMAQI
12th Jul 2026292 PMAQI
12th Jul 2026313 PMAQI
12th Jul 2026234 PMAQI
12th Jul 2026215 PMAQI
12th Jul 2026216 PMAQI
12th Jul 2026197 PMAQI
12th Jul 2026238 PMAQI
12th Jul 2026239 PMAQI
12th Jul 20262110 PMAQI
12th Jul 20262311 PMAQI
13th Jul 20262512 AMAQI
13th Jul 2026251 AMAQI
13th Jul 2026252 AMAQI
13th Jul 2026213 AMAQI
20°C14/29°C
13th Jul 2026234 AMAQI
13th Jul 2026255 AMAQI
13th Jul 2026266 AMAQI
13th Jul 2026247 AMAQI
13th Jul 2026288 AMAQI
13th Jul 2026289 AMAQI
13th Jul 20262410 AMAQI
13th Jul 20262611 AMAQI
13th Jul 20262612 PMAQI
13th Jul 2026201 PMAQI
13th Jul 2026202 PMAQI
13th Jul 2026203 PMAQI
13th Jul 2026224 PMAQI
13th Jul 2026275 PMAQI
13th Jul 2026286 PMAQI
13th Jul 2026307 PMAQI
13th Jul 2026298 PMAQI
13th Jul 2026309 PMAQI
13th Jul 20263010 PMAQI
13th Jul 20263311 PMAQI
14th Jul 20263112 AMAQI
14th Jul 2026321 AMAQI
14th Jul 2026312 AMAQI
14th Jul 2026303 AMAQI
20°C15/27°C
14th Jul 2026244 AMAQI
14th Jul 2026305 AMAQI
14th Jul 2026306 AMAQI
14th Jul 2026307 AMAQI
14th Jul 2026268 AMAQI
14th Jul 2026319 AMAQI
14th Jul 20263110 AMAQI
14th Jul 20262611 AMAQI
14th Jul 20262412 PMAQI
14th Jul 2026211 PMAQI
14th Jul 2026192 PMAQI
14th Jul 2026193 PMAQI
14th Jul 2026204 PMAQI
14th Jul 2026275 PMAQI
14th Jul 2026276 PMAQI
14th Jul 2026267 PMAQI
14th Jul 2026308 PMAQI
14th Jul 2026289 PMAQI
14th Jul 20263210 PMAQI
14th Jul 20263211 PMAQI
15th Jul 20263212 AMAQI
15th Jul 2026341 AMAQI
15th Jul 2026322 AMAQI
15th Jul 2026323 AMAQI
22°C14/33°C
15th Jul 2026264 AMAQI
15th Jul 2026305 AMAQI
15th Jul 2026246 AMAQI
15th Jul 2026297 AMAQI
15th Jul 2026308 AMAQI
15th Jul 2026289 AMAQI
15th Jul 20266410 AMAQI
15th Jul 20266011 AMAQI
15th Jul 20264812 PMAQI
15th Jul 2026501 PMAQI
15th Jul 2026332 PMAQI
15th Jul 2026213 PMAQI
15th Jul 2026254 PMAQI
15th Jul 2026255 PMAQI
15th Jul 2026446 PMAQI
15th Jul 2026317 PMAQI
15th Jul 2026468 PMAQI
15th Jul 2026409 PMAQI
15th Jul 20264410 PMAQI
15th Jul 20265311 PMAQI
16th Jul 20265212 AMAQI
16th Jul 2026561 AMAQI
16th Jul 2026592 AMAQI
16th Jul 2026653 AMAQI
23°C15/33°C
16th Jul 2026634 AMAQI
16th Jul 2026605 AMAQI
16th Jul 2026596 AMAQI
16th Jul 2026597 AMAQI
16th Jul 2026548 AMAQI
16th Jul 2026539 AMAQI
16th Jul 20265310 AMAQI
16th Jul 20264611 AMAQI
16th Jul 20264612 PMAQI
16th Jul 2026441 PMAQI
16th Jul 2026422 PMAQI
16th Jul 2026483 PMAQI
16th Jul 2026444 PMAQI
16th Jul 2026485 PMAQI
16th Jul 2026516 PMAQI
16th Jul 2026487 PMAQI
16th Jul 2026648 PMAQI
16th Jul 2026569 PMAQI
16th Jul 20265110 PMAQI
16th Jul 20265411 PMAQI
17th Jul 20265912 AMAQI
17th Jul 2026401 AMAQI
17th Jul 2026532 AMAQI
17th Jul 2026533 AMAQI
22°C16/32°C
17th Jul 2026484 AMAQI
17th Jul 2026525 AMAQI
17th Jul 2026506 AMAQI
17th Jul 2026387 AMAQI
17th Jul 2026388 AMAQI
17th Jul 2026339 AMAQI
17th Jul 20263110 AMAQI
17th Jul 20262411 AMAQI
17th Jul 20262612 PMAQI
17th Jul 2026241 PMAQI
17th Jul 2026242 PMAQI
17th Jul 2026243 PMAQI
17th Jul 2026484 PMAQI
17th Jul 2026505 PMAQI
17th Jul 2026486 PMAQI
17th Jul 2026507 PMAQI
17th Jul 2026538 PMAQI
17th Jul 2026539 PMAQI
17th Jul 20265510 PMAQI
17th Jul 20265511 PMAQI
18th Jul 20265212 AMAQI
18th Jul 2026511 AMAQI
18th Jul 2026502 AMAQI
18th Jul 2026513 AMAQI
22°C16/28°C
18th Jul 2026514 AMAQI
18th Jul 2026535 AMAQI
18th Jul 2026526 AMAQI
18th Jul 2026537 AMAQI
18th Jul 2026528 AMAQI
18th Jul 2026539 AMAQI
18th Jul 20265210 AMAQI
18th Jul 20265211 AMAQI
18th Jul 20265012 PMAQI
18th Jul 2026311 PMAQI
18th Jul 2026312 PMAQI
18th Jul 2026313 PMAQI
18th Jul 2026364 PMAQI
18th Jul 2026365 PMAQI
18th Jul 2026336 PMAQI
18th Jul 2026337 PMAQI
18th Jul 2026318 PMAQI
18th Jul 2026319 PMAQI
18th Jul 20263110 PMAQI
18th Jul 20263111 PMAQI
19th Jul 20263312 AMAQI
19th Jul 2026311 AMAQI
19th Jul 2026272 AMAQI
19th Jul 2026253 AMAQI
22°C16/28°C
19th Jul 2026254 AMAQI
19th Jul 2026255 AMAQI
19th Jul 2026256 AMAQI
19th Jul 2026257 AMAQI
19th Jul 2026218 AMAQI
19th Jul 2026219 AMAQI
19th Jul 20262110 AMAQI
19th Jul 20262111 AMAQI
19th Jul 20262512 PMAQI
19th Jul 2026231 PMAQI
19th Jul 2026232 PMAQI
19th Jul 2026233 PMAQI
19th Jul 2026234 PMAQI
19th Jul 2026235 PMAQI
19th Jul 2026256 PMAQI
19th Jul 2026257 PMAQI
19th Jul 2026258 PMAQI
19th Jul 2026219 PMAQI
19th Jul 20262310 PMAQI
19th Jul 20262511 PMAQI
20th Jul 20262312 AMAQI
20th Jul 2026251 AMAQI
20th Jul 2026252 AMAQI
20th Jul 2026253 AMAQI
23°C17/30°C
20th Jul 2026254 AMAQI
20th Jul 2026255 AMAQI
20th Jul 2026256 AMAQI
20th Jul 2026257 AMAQI
20th Jul 2026258 AMAQI
20th Jul 2026259 AMAQI
20th Jul 20262510 AMAQI
20th Jul 20262511 AMAQI
20th Jul 20262512 PMAQI
20th Jul 2026251 PMAQI
20th Jul 2026252 PMAQI
20th Jul 2026253 PMAQI
20th Jul 2026294 PMAQI
20th Jul 2026275 PMAQI
20th Jul 2026296 PMAQI
20th Jul 2026297 PMAQI
20th Jul 2026298 PMAQI
20th Jul 2026369 PMAQI
20th Jul 20263110 PMAQI
20th Jul 20262911 PMAQI
21st Jul 20262912 AMAQI
21st Jul 2026291 AMAQI
21st Jul 2026292 AMAQI
21st Jul 2026313 AMAQI
23°C16/32°C
21st Jul 2026334 AMAQI
21st Jul 2026295 AMAQI
21st Jul 2026316 AMAQI
21st Jul 2026297 AMAQI
21st Jul 2026338 AMAQI
21st Jul 2026319 AMAQI
21st Jul 20263310 AMAQI
21st Jul 20263111 AMAQI
21st Jul 2026331 PMAQI
21st Jul 2026362 PMAQI
21st Jul 2026363 PMAQI
21st Jul 2026334 PMAQI
21st Jul 2026365 PMAQI
21st Jul 2026386 PMAQI
21st Jul 2026847 PMAQI
21st Jul 2026428 PMAQI
21st Jul 2026409 PMAQI
21st Jul 20264010 PMAQI
21st Jul 20263811 PMAQI
22nd Jul 20263112 AMAQI
22nd Jul 2026421 AMAQI
22nd Jul 2026442 AMAQI
22nd Jul 2026333 AMAQI
23°C16/32°C
22nd Jul 2026314 AMAQI
22nd Jul 2026295 AMAQI
22nd Jul 2026296 AMAQI
22nd Jul 2026317 AMAQI
22nd Jul 2026338 AMAQI
22nd Jul 2026299 AMAQI
22nd Jul 20262910 AMAQI
22nd Jul 20262911 AMAQI
22nd Jul 20263312 PMAQI
22nd Jul 2026361 PMAQI
22nd Jul 2026402 PMAQI
22nd Jul 2026463 PMAQI
22nd Jul 2026424 PMAQI
22nd Jul 2026515 PMAQI
22nd Jul 2026576 PMAQI
22nd Jul 2026647 PMAQI
22nd Jul 2026598 PMAQI
22nd Jul 2026609 PMAQI
22nd Jul 20265910 PMAQI
22nd Jul 20266011 PMAQI
23rd Jul 20265412 AMAQI
23rd Jul 2026601 AMAQI
23rd Jul 2026582 AMAQI
23rd Jul 2026543 AMAQI
24°C16/34°C
23rd Jul 2026524 AMAQI
23rd Jul 2026555 AMAQI
23rd Jul 2026516 AMAQI
23rd Jul 2026427 AMAQI
23rd Jul 2026338 AMAQI
23rd Jul 2026369 AMAQI
23rd Jul 20262610 AMAQI
23rd Jul 20262511 AMAQI
23rd Jul 20262312 PMAQI
23rd Jul 2026181 PMAQI
23rd Jul 2026202 PMAQI
23rd Jul 2026183 PMAQI
23rd Jul 2026204 PMAQI
23rd Jul 2026195 PMAQI
23rd Jul 2026406 PMAQI
23rd Jul 2026547 PMAQI
23rd Jul 2026558 PMAQI
23rd Jul 2026569 PMAQI
23rd Jul 20265210 PMAQI
23rd Jul 20265211 PMAQI
24th Jul 20264612 AMAQI
24th Jul 2026421 AMAQI
24th Jul 2026362 AMAQI
24th Jul 2026273 AMAQI
24°C15/35°C
24th Jul 2026274 AMAQI
24th Jul 2026275 AMAQI
24th Jul 2026276 AMAQI
24th Jul 2026297 AMAQI
24th Jul 2026218 AMAQI
24th Jul 2026219 AMAQI
24th Jul 20262510 AMAQI
24th Jul 20262711 AMAQI
24th Jul 20262712 PMAQI
24th Jul 2026251 PMAQI
24th Jul 2026172 PMAQI
24th Jul 2026203 PMAQI
24th Jul 2026234 PMAQI
24th Jul 2026295 PMAQI
24th Jul 2026406 PMAQI
24th Jul 2026567 PMAQI
24th Jul 2026558 PMAQI
24th Jul 2026339 PMAQI
24th Jul 20263110 PMAQI
24th Jul 20262911 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026291 AMAQI
25th Jul 2026292 AMAQI
25th Jul 2026293 AMAQI
23°C15/33°C
25th Jul 2026314 AMAQI
25th Jul 2026335 AMAQI
25th Jul 2026256 AMAQI
25th Jul 2026297 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262910 AMAQI
25th Jul 20262911 AMAQI
25th Jul 20262912 PMAQI
25th Jul 2026271 PMAQI
25th Jul 2026272 PMAQI
25th Jul 2026273 PMAQI
25th Jul 2026254 PMAQI
25th Jul 2026255 PMAQI
25th Jul 2026256 PMAQI
25th Jul 2026297 PMAQI
25th Jul 2026278 PMAQI
25th Jul 2026279 PMAQI
25th Jul 20262710 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262912 AMAQI
26th Jul 2026271 AMAQI
26th Jul 2026252 AMAQI
26th Jul 2026253 AMAQI
22°C14/34°C
26th Jul 2026274 AMAQI
26th Jul 2026275 AMAQI
26th Jul 2026276 AMAQI
26th Jul 2026257 AMAQI
26th Jul 2026258 AMAQI
26th Jul 2026299 AMAQI
26th Jul 20262710 AMAQI
26th Jul 20262911 AMAQI
26th Jul 20262512 PMAQI
26th Jul 2026271 PMAQI
26th Jul 2026272 PMAQI
26th Jul 2026253 PMAQI
26th Jul 2026254 PMAQI
26th Jul 2026255 PMAQI
26th Jul 2026256 PMAQI
26th Jul 2026237 PMAQI
26th Jul 2026218 PMAQI
26th Jul 2026219 PMAQI
26th Jul 20262110 PMAQI
26th Jul 20262111 PMAQI
27th Jul 20262512 AMAQI
27th Jul 2026211 AMAQI
27th Jul 2026212 AMAQI
27th Jul 2026213 AMAQI
21°C14/30°C
27th Jul 2026384 AMAQI
27th Jul 2026405 AMAQI
27th Jul 2026326 AMAQI
27th Jul 2026387 AMAQI
27th Jul 2026318 AMAQI
27th Jul 2026389 AMAQI
27th Jul 20263010 AMAQI
27th Jul 20263311 AMAQI
27th Jul 20263812 PMAQI
27th Jul 2026401 PMAQI
27th Jul 2026292 PMAQI
27th Jul 2026293 PMAQI
27th Jul 2026294 PMAQI
27th Jul 2026295 PMAQI
27th Jul 2026256 PMAQI
27th Jul 2026257 PMAQI
27th Jul 2026218 PMAQI
27th Jul 2026339 PMAQI
27th Jul 20264010 PMAQI
27th Jul 20262511 PMAQI
28th Jul 20263412 AMAQI
28th Jul 2026421 AMAQI
28th Jul 2026292 AMAQI
28th Jul 2026253 AMAQI
20°C13/28°C
28th Jul 2026384 AMAQI
28th Jul 2026365 AMAQI
28th Jul 2026296 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026338 AMAQI
28th Jul 2026279 AMAQI
28th Jul 20262510 AMAQI
28th Jul 20262311 AMAQI
28th Jul 20262112 PMAQI
28th Jul 2026211 PMAQI
28th Jul 2026212 PMAQI
28th Jul 2026293 PMAQI
28th Jul 2026424 PMAQI
28th Jul 2026405 PMAQI
28th Jul 2026406 PMAQI
28th Jul 2026407 PMAQI
28th Jul 2026368 PMAQI
28th Jul 2026369 PMAQI
28th Jul 20263110 PMAQI
28th Jul 20263111 PMAQI
29th Jul 20262912 AMAQI
29th Jul 2026311 AMAQI
29th Jul 2026332 AMAQI
29th Jul 2026333 AMAQI
18°C14/26°C
29th Jul 2026314 AMAQI
29th Jul 2026295 AMAQI
29th Jul 2026256 AMAQI
29th Jul 2026297 AMAQI
29th Jul 2026278 AMAQI
29th Jul 2026319 AMAQI
29th Jul 20262710 AMAQI
29th Jul 20262711 AMAQI
29th Jul 20262712 PMAQI
29th Jul 2026291 PMAQI
29th Jul 2026252 PMAQI
29th Jul 2026233 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026255 PMAQI
29th Jul 2026256 PMAQI
29th Jul 2026297 PMAQI
29th Jul 2026278 PMAQI
29th Jul 2026299 PMAQI
29th Jul 20262510 PMAQI
29th Jul 20263111 PMAQI
30th Jul 20262912 AMAQI
30th Jul 2026271 AMAQI
30th Jul 2026292 AMAQI
30th Jul 2026253 AMAQI
20°C13/30°C
30th Jul 2026274 AMAQI
30th Jul 2026275 AMAQI
30th Jul 2026276 AMAQI
30th Jul 2026257 AMAQI
30th Jul 2026238 AMAQI
30th Jul 2026219 AMAQI
30th Jul 20262510 AMAQI
30th Jul 20262711 AMAQI
30th Jul 20262712 PMAQI
30th Jul 2026291 PMAQI
30th Jul 2026362 PMAQI
30th Jul 2026343 PMAQI
30th Jul 2026294 PMAQI
30th Jul 2026215 PMAQI
30th Jul 2026276 PMAQI
30th Jul 2026257 PMAQI
30th Jul 2026218 PMAQI
30th Jul 2026219 PMAQI
30th Jul 20262110 PMAQI
30th Jul 20262111 PMAQI
31st Jul 20262312 AMAQI
31st Jul 2026231 AMAQI
31st Jul 2026212 AMAQI
31st Jul 2026213 AMAQI
22°C14/32°C
31st Jul 2026234 AMAQI
31st Jul 2026215 AMAQI
31st Jul 2026216 AMAQI
31st Jul 2026217 AMAQI
31st Jul 2026238 AMAQI
31st Jul 2026239 AMAQI
31st Jul 20262110 AMAQI
31st Jul 20262311 AMAQI
31st Jul 20262112 PMAQI
31st Jul 2026231 PMAQI
31st Jul 2026232 PMAQI
31st Jul 2026253 PMAQI
31st Jul 2026254 PMAQI
31st Jul 2026235 PMAQI
31st Jul 2026256 PMAQI
31st Jul 2026277 PMAQI
31st Jul 2026258 PMAQI
31st Jul 2026259 PMAQI
31st Jul 20262710 PMAQI
31st Jul 20262511 PMAQI
1st Aug 20262712 AMAQI
1st Aug 2026251 AMAQI
1st Aug 2026252 AMAQI
1st Aug 2026293 AMAQI
22°C14/33°C
1st Aug 2026274 AMAQI
1st Aug 2026275 AMAQI
1st Aug 2026256 AMAQI
1st Aug 2026277 AMAQI
1st Aug 2026298 AMAQI
1st Aug 2026299 AMAQI
1st Aug 20262910 AMAQI
1st Aug 20262911 AMAQI
1st Aug 20262712 PMAQI
1st Aug 2026291 PMAQI
1st Aug 2026252 PMAQI
1st Aug 2026253 PMAQI
1st Aug 2026254 PMAQI
1st Aug 2026235 PMAQI
1st Aug 2026236 PMAQI
1st Aug 2026257 PMAQI
1st Aug 2026258 PMAQI
1st Aug 2026259 PMAQI
1st Aug 20262310 PMAQI
1st Aug 20262511 PMAQI
2nd Aug 20262312 AMAQI
2nd Aug 2026231 AMAQI
2nd Aug 2026232 AMAQI
2nd Aug 2026253 AMAQI
22°C15/33°C
2nd Aug 2026254 AMAQI
2nd Aug 2026255 AMAQI
2nd Aug 2026256 AMAQI
2nd Aug 2026237 AMAQI
2nd Aug 2026258 AMAQI
2nd Aug 2026239 AMAQI
2nd Aug 20262310 AMAQI
2nd Aug 20262311 AMAQI
2nd Aug 20262112 PMAQI
2nd Aug 2026231 PMAQI
2nd Aug 2026252 PMAQI
2nd Aug 2026213 PMAQI
2nd Aug 2026254 PMAQI
2nd Aug 2026255 PMAQI
2nd Aug 2026256 PMAQI
2nd Aug 2026257 PMAQI
2nd Aug 2026278 PMAQI
2nd Aug 2026279 PMAQI
2nd Aug 20262510 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20262512 AMAQI
3rd Aug 2026251 AMAQI
3rd Aug 2026272 AMAQI
3rd Aug 2026273 AMAQI
22°C15/33°C
3rd Aug 2026274 AMAQI
3rd Aug 2026275 AMAQI
3rd Aug 2026276 AMAQI
3rd Aug 2026277 AMAQI
3rd Aug 2026278 AMAQI
3rd Aug 2026299 AMAQI
3rd Aug 20262710 AMAQI
3rd Aug 20262911 AMAQI
3rd Aug 20263112 PMAQI
3rd Aug 2026291 PMAQI
3rd Aug 2026332 PMAQI
3rd Aug 2026333 PMAQI
3rd Aug 2026334 PMAQI
3rd Aug 2026335 PMAQI
3rd Aug 2026316 PMAQI
3rd Aug 2026297 PMAQI
3rd Aug 2026318 PMAQI
3rd Aug 2026299 PMAQI
3rd Aug 20263110 PMAQI
3rd Aug 20262911 PMAQI
4th Aug 20262512 AMAQI
4th Aug 2026271 AMAQI
4th Aug 2026252 AMAQI
4th Aug 2026253 AMAQI
22°C16/28°C
4th Aug 2026254 AMAQI
4th Aug 2026255 AMAQI
4th Aug 2026216 AMAQI
4th Aug 2026217 AMAQI
4th Aug 2026218 AMAQI
4th Aug 2026219 AMAQI
4th Aug 20262910 AMAQI
4th Aug 20262911 AMAQI
4th Aug 20263412 PMAQI
4th Aug 2026231 PMAQI
4th Aug 2026312 PMAQI
4th Aug 2026253 PMAQI
4th Aug 2026314 PMAQI
4th Aug 2026255 PMAQI
4th Aug 2026216 PMAQI
4th Aug 2026257 PMAQI
4th Aug 2026258 PMAQI
4th Aug 2026299 PMAQI
4th Aug 20262510 PMAQI
4th Aug 20262511 PMAQI
5th Aug 20262112 AMAQI
5th Aug 2026211 AMAQI
5th Aug 2026212 AMAQI
5th Aug 2026213 AMAQI
22°C16/31°C
5th Aug 2026234 AMAQI
5th Aug 2026215 AMAQI
5th Aug 2026216 AMAQI
5th Aug 2026217 AMAQI
5th Aug 2026238 AMAQI
5th Aug 2026239 AMAQI
5th Aug 20262310 AMAQI
5th Aug 20262511 AMAQI
5th Aug 20262512 PMAQI
5th Aug 2026251 PMAQI
5th Aug 2026252 PMAQI
5th Aug 2026253 PMAQI
5th Aug 2026234 PMAQI
5th Aug 2026255 PMAQI
5th Aug 2026256 PMAQI
5th Aug 2026297 PMAQI
5th Aug 2026278 PMAQI
5th Aug 2026319 PMAQI
5th Aug 20263310 PMAQI
5th Aug 20263311 PMAQI
6th Aug 20263612 AMAQI
6th Aug 2026381 AMAQI
6th Aug 2026382 AMAQI
6th Aug 2026383 AMAQI
22°C12/32°C
6th Aug 2026384 AMAQI
6th Aug 2026425 AMAQI
6th Aug 2026406 AMAQI
6th Aug 2026427 AMAQI
6th Aug 2026408 AMAQI
6th Aug 2026369 AMAQI
6th Aug 20263610 AMAQI
6th Aug 20263611 AMAQI
6th Aug 20263612 PMAQI
6th Aug 2026361 PMAQI
6th Aug 2026332 PMAQI
6th Aug 2026313 PMAQI
6th Aug 2026294 PMAQI
6th Aug 2026295 PMAQI
6th Aug 2026316 PMAQI
6th Aug 2026337 PMAQI
6th Aug 2026298 PMAQI
6th Aug 2026319 PMAQI
6th Aug 20263110 PMAQI
6th Aug 20262911 PMAQI
7th Aug 20262912 AMAQI
7th Aug 2026311 AMAQI
7th Aug 2026292 AMAQI
7th Aug 2026293 AMAQI
21°C14/32°C
7th Aug 2026314 AMAQI
4 AM7th Aug 2026295 AMAQI
7th Aug 2026296 AMAQI
7th Aug 2026277 AMAQI
7th Aug 2026278 AMAQI
7th Aug 2026259 AMAQI
7th Aug 20262510 AMAQI
7th Aug 20262511 AMAQI
11 AM7th Aug 20262712 PMAQI
7th Aug 2026231 PMAQI
7th Aug 2026252 PMAQI
7th Aug 2026233 PMAQI
7th Aug 2026214 PMAQI
7th Aug 2026235 PMAQI
7th Aug 2026236 PMAQI
7th Aug 2026217 PMAQI
7 PM7th Aug 2026218 PMAQI
7th Aug 2026349 PMAQI
7th Aug 20262110 PMAQI
7th Aug 20262111 PMAQI
11 PM3 AM
21°C14/30°C
Day time
Avg. Highest Time
7 PM
34AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
2 PM - 3 PM
27AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 7 PM (Avg. 34), while the lowest AQI was between 2 PM to 3 PM (Avg. 27).
Night time
Avg. Highest Time
1 AM
33AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
3 AM
31AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 1 AM (Avg. 33), while the lowest AQI was between 3 AM to 3 AM (Avg. 31).
2026 Days Vs Air Quality
Arai, Ina, Nagano, Japan
2026
91%
199
9%
20
Total number of days with different AQI categories in last 219 days in 2026 (146 days remaining)
Good
199 DaysModerate
20 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2026, 91% of 219 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Arai, Ina, Nagano, Japan
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
20AQI (US)
20AQI (US)
2nd January 2026
26AQI (US)
26AQI (US)
3rd January 2026
20AQI (US)
20AQI (US)
4th January 2026
27AQI (US)
27AQI (US)
5th January 2026
37AQI (US)
37AQI (US)
6th January 2026
18AQI (US)
18AQI (US)
7th January 2026
35AQI (US)
35AQI (US)
8th January 2026
32AQI (US)
32AQI (US)
9th January 2026
25AQI (US)
25AQI (US)
10th January 2026
38AQI (US)
38AQI (US)
11th January 2026
30AQI (US)
30AQI (US)
12th January 2026
21AQI (US)
21AQI (US)
13th January 2026
22AQI (US)
22AQI (US)
14th January 2026
13AQI (US)
13AQI (US)
15th January 2026
36AQI (US)
36AQI (US)
16th January 2026
36AQI (US)
36AQI (US)
17th January 2026
47AQI (US)
47AQI (US)
18th January 2026
40AQI (US)
40AQI (US)
19th January 2026
51AQI (US)
51AQI (US)
20th January 2026
33AQI (US)
33AQI (US)
21st January 2026
21AQI (US)
21AQI (US)
22nd January 2026
21AQI (US)
21AQI (US)
23rd January 2026
28AQI (US)
28AQI (US)
24th January 2026
39AQI (US)
39AQI (US)
25th January 2026
42AQI (US)
42AQI (US)
26th January 2026
21AQI (US)
21AQI (US)
27th January 2026
39AQI (US)
39AQI (US)
28th January 2026
27AQI (US)
27AQI (US)
29th January 2026
25AQI (US)
25AQI (US)
30th January 2026
40AQI (US)
40AQI (US)
31st January 2026
24AQI (US)
24AQI (US)
1st February 2026
33AQI (US)
33AQI (US)
2nd February 2026
44AQI (US)
44AQI (US)
3rd February 2026
29AQI (US)
29AQI (US)
4th February 2026
28AQI (US)
28AQI (US)
5th February 2026
45AQI (US)
45AQI (US)
6th February 2026
48AQI (US)
48AQI (US)
7th February 2026
12AQI (US)
12AQI (US)
8th February 2026
11AQI (US)
11AQI (US)
9th February 2026
32AQI (US)
32AQI (US)
10th February 2026
35AQI (US)
35AQI (US)
11th February 2026
40AQI (US)
40AQI (US)
12th February 2026
46AQI (US)
46AQI (US)
13th February 2026
60AQI (US)
60AQI (US)
14th February 2026
55AQI (US)
55AQI (US)
15th February 2026
57AQI (US)
57AQI (US)
16th February 2026
53AQI (US)
53AQI (US)
17th February 2026
23AQI (US)
23AQI (US)
18th February 2026
22AQI (US)
22AQI (US)
19th February 2026
29AQI (US)
29AQI (US)
20th February 2026
29AQI (US)
29AQI (US)
21st February 2026
50AQI (US)
50AQI (US)
22nd February 2026
40AQI (US)
40AQI (US)
23rd February 2026
44AQI (US)
44AQI (US)
24th February 2026
48AQI (US)
48AQI (US)
25th February 2026
19AQI (US)
19AQI (US)
26th February 2026
12AQI (US)
12AQI (US)
27th February 2026
22AQI (US)
22AQI (US)
28th February 2026
15AQI (US)
15AQI (US)
1st March 2026
21AQI (US)
21AQI (US)
2nd March 2026
55AQI (US)
55AQI (US)
3rd March 2026
36AQI (US)
36AQI (US)
4th March 2026
42AQI (US)
42AQI (US)
5th March 2026
49AQI (US)
49AQI (US)
6th March 2026
42AQI (US)
42AQI (US)
7th March 2026
34AQI (US)
34AQI (US)
8th March 2026
35AQI (US)
35AQI (US)
9th March 2026
40AQI (US)
40AQI (US)
10th March 2026
50AQI (US)
50AQI (US)
11th March 2026
51AQI (US)
51AQI (US)
12th March 2026
53AQI (US)
53AQI (US)
13th March 2026
33AQI (US)
33AQI (US)
14th March 2026
38AQI (US)
38AQI (US)
15th March 2026
44AQI (US)
44AQI (US)
16th March 2026
44AQI (US)
44AQI (US)
17th March 2026
40AQI (US)
40AQI (US)
18th March 2026
46AQI (US)
46AQI (US)
19th March 2026
24AQI (US)
24AQI (US)
20th March 2026
54AQI (US)
54AQI (US)
21st March 2026
48AQI (US)
48AQI (US)
22nd March 2026
45AQI (US)
45AQI (US)
23rd March 2026
46AQI (US)
46AQI (US)
24th March 2026
44AQI (US)
44AQI (US)
25th March 2026
50AQI (US)
50AQI (US)
26th March 2026
10AQI (US)
10AQI (US)
27th March 2026
21AQI (US)
21AQI (US)
28th March 2026
54AQI (US)
54AQI (US)
29th March 2026
59AQI (US)
59AQI (US)
30th March 2026
48AQI (US)
48AQI (US)
31st March 2026
12AQI (US)
12AQI (US)
1st April 2026
17AQI (US)
17AQI (US)
2nd April 2026
29AQI (US)
29AQI (US)
3rd April 2026
45AQI (US)
45AQI (US)
4th April 2026
39AQI (US)
39AQI (US)
5th April 2026
17AQI (US)
17AQI (US)
6th April 2026
38AQI (US)
38AQI (US)
7th April 2026
32AQI (US)
32AQI (US)
8th April 2026
26AQI (US)
26AQI (US)
9th April 2026
23AQI (US)
23AQI (US)
10th April 2026
40AQI (US)
40AQI (US)
11th April 2026
27AQI (US)
27AQI (US)
12th April 2026
28AQI (US)
28AQI (US)
13th April 2026
30AQI (US)
30AQI (US)
14th April 2026
40AQI (US)
40AQI (US)
15th April 2026
26AQI (US)
26AQI (US)
16th April 2026
25AQI (US)
25AQI (US)
17th April 2026
31AQI (US)
31AQI (US)
18th April 2026
32AQI (US)
32AQI (US)
19th April 2026
31AQI (US)
31AQI (US)
20th April 2026
30AQI (US)
30AQI (US)
21st April 2026
30AQI (US)
30AQI (US)
22nd April 2026
39AQI (US)
39AQI (US)
23rd April 2026
27AQI (US)
27AQI (US)
24th April 2026
21AQI (US)
21AQI (US)
25th April 2026
32AQI (US)
32AQI (US)
26th April 2026
43AQI (US)
43AQI (US)
27th April 2026
41AQI (US)
41AQI (US)
28th April 2026
35AQI (US)
35AQI (US)
29th April 2026
32AQI (US)
32AQI (US)
30th April 2026
24AQI (US)
24AQI (US)
1st May 2026
26AQI (US)
26AQI (US)
2nd May 2026
42AQI (US)
42AQI (US)
3rd May 2026
49AQI (US)
49AQI (US)
4th May 2026
20AQI (US)
20AQI (US)
5th May 2026
21AQI (US)
21AQI (US)
6th May 2026
27AQI (US)
27AQI (US)
7th May 2026
28AQI (US)
28AQI (US)
8th May 2026
27AQI (US)
27AQI (US)
9th May 2026
23AQI (US)
23AQI (US)
10th May 2026
25AQI (US)
25AQI (US)
11th May 2026
28AQI (US)
28AQI (US)
12th May 2026
33AQI (US)
33AQI (US)
13th May 2026
37AQI (US)
37AQI (US)
14th May 2026
31AQI (US)
31AQI (US)
15th May 2026
33AQI (US)
33AQI (US)
16th May 2026
84AQI (US)
84AQI (US)
17th May 2026
68AQI (US)
68AQI (US)
18th May 2026
53AQI (US)
53AQI (US)
19th May 2026
48AQI (US)
48AQI (US)
20th May 2026
61AQI (US)
61AQI (US)
21st May 2026
60AQI (US)
60AQI (US)
22nd May 2026
63AQI (US)
63AQI (US)
23rd May 2026
54AQI (US)
54AQI (US)
24th May 2026
59AQI (US)
59AQI (US)
25th May 2026
49AQI (US)
49AQI (US)
26th May 2026
40AQI (US)
40AQI (US)
27th May 2026
24AQI (US)
24AQI (US)
28th May 2026
25AQI (US)
25AQI (US)
29th May 2026
22AQI (US)
22AQI (US)
30th May 2026
21AQI (US)
21AQI (US)
31st May 2026
24AQI (US)
24AQI (US)
1st June 2026
27AQI (US)
27AQI (US)
2nd June 2026
29AQI (US)
29AQI (US)
3rd June 2026
21AQI (US)
21AQI (US)
4th June 2026
20AQI (US)
20AQI (US)
5th June 2026
20AQI (US)
20AQI (US)
6th June 2026
20AQI (US)
20AQI (US)
7th June 2026
20AQI (US)
20AQI (US)
8th June 2026
16AQI (US)
16AQI (US)
9th June 2026
22AQI (US)
22AQI (US)
10th June 2026
20AQI (US)
20AQI (US)
11th June 2026
23AQI (US)
23AQI (US)
12th June 2026
24AQI (US)
24AQI (US)
13th June 2026
25AQI (US)
25AQI (US)
14th June 2026
23AQI (US)
23AQI (US)
15th June 2026
20AQI (US)
20AQI (US)
16th June 2026
24AQI (US)
24AQI (US)
17th June 2026
24AQI (US)
24AQI (US)
18th June 2026
23AQI (US)
23AQI (US)
19th June 2026
25AQI (US)
25AQI (US)
20th June 2026
23AQI (US)
23AQI (US)
21st June 2026
14AQI (US)
14AQI (US)
22nd June 2026
18AQI (US)
18AQI (US)
23rd June 2026
19AQI (US)
19AQI (US)
24th June 2026
21AQI (US)
21AQI (US)
25th June 2026
25AQI (US)
25AQI (US)
26th June 2026
26AQI (US)
26AQI (US)
27th June 2026
25AQI (US)
25AQI (US)
28th June 2026
24AQI (US)
24AQI (US)
29th June 2026
23AQI (US)
23AQI (US)
30th June 2026
37AQI (US)
37AQI (US)
1st July 2026
36AQI (US)
36AQI (US)
2nd July 2026
14AQI (US)
14AQI (US)
3rd July 2026
12AQI (US)
12AQI (US)
4th July 2026
22AQI (US)
22AQI (US)
5th July 2026
17AQI (US)
17AQI (US)
6th July 2026
14AQI (US)
14AQI (US)
7th July 2026
16AQI (US)
16AQI (US)
8th July 2026
21AQI (US)
21AQI (US)
9th July 2026
24AQI (US)
24AQI (US)
10th July 2026
32AQI (US)
32AQI (US)
11th July 2026
29AQI (US)
29AQI (US)
12th July 2026
28AQI (US)
28AQI (US)
13th July 2026
26AQI (US)
26AQI (US)
14th July 2026
27AQI (US)
27AQI (US)
15th July 2026
37AQI (US)
37AQI (US)
16th July 2026
53AQI (US)
53AQI (US)
17th July 2026
43AQI (US)
43AQI (US)
18th July 2026
43AQI (US)
43AQI (US)
19th July 2026
24AQI (US)
24AQI (US)
20th July 2026
27AQI (US)
27AQI (US)
21st July 2026
36AQI (US)
36AQI (US)
22nd July 2026
42AQI (US)
42AQI (US)
23rd July 2026
41AQI (US)
41AQI (US)
24th July 2026
31AQI (US)
31AQI (US)
25th July 2026
28AQI (US)
28AQI (US)
26th July 2026
25AQI (US)
25AQI (US)
27th July 2026
30AQI (US)
30AQI (US)
28th July 2026
31AQI (US)
31AQI (US)
29th July 2026
28AQI (US)
28AQI (US)
30th July 2026
26AQI (US)
26AQI (US)
31st July 2026
23AQI (US)
23AQI (US)
1st August 2026
26AQI (US)
26AQI (US)
2nd August 2026
24AQI (US)
24AQI (US)
3rd August 2026
29AQI (US)
29AQI (US)
4th August 2026
26AQI (US)
26AQI (US)
5th August 2026
25AQI (US)
25AQI (US)
6th August 2026
35AQI (US)
35AQI (US)
7th August 2026
26AQI (US)
26AQI (US)
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
30AQI (US)
35AQI (US)
41AQI (US)
31AQI (US)
39AQI (US)
23AQI (US)
29AQI (US)
27AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202632AQI (US)
30
1
24
4
25
6
30
23
8
30
30
1
7
199
20
Highest AQI (US) recorded in
March41AQI (US)
Lowest AQI (US) recorded in
June23AQI (US)
202540AQI (US)
30
1
28
26
5
26
4
28
3
27
3
24
7
22
9
30
26
5
21
9
24
7
312
53
Highest AQI (US) recorded in
August46AQI (US)
Lowest AQI (US) recorded in
September33AQI (US)
202431AQI (US)
30
29
28
3
23
7
31
26
4
31
29
2
28
2
31
30
31
347
18
Highest AQI (US) recorded in
April43AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
202334AQI (US)
28
3
28
25
6
23
7
29
2
30
27
4
31
30
31
28
1
30
1
340
24
Highest AQI (US) recorded in
April45AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202235AQI (US)
30
20
1
23
8
14
3
24
7
26
4
18
3
1
27
1
31
28
2
31
273
29
Highest AQI (US) recorded in
March43AQI (US)
Lowest AQI (US) recorded in
August19AQI (US)
202131AQI (US)
27
3
25
3
28
1
20
1
30
1
25
5
29
2
31
30
31
26
4
31
333
20
Highest AQI (US) recorded in
June40AQI (US)
Lowest AQI (US) recorded in
August25AQI (US)
202028AQI (US)
12
1
18
3
18
25
5
31
22
8
1
19
30
1
30
31
236
18
1
Highest AQI (US) recorded in
August44AQI (US)
Lowest AQI (US) recorded in
July17AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2025(Avg.)
40AQI (US)Least Polluted Year Recorded
2020(Avg.)
28AQI (US)Arai's annual 2026 AQI (US) (32) shows an average percentage change of -2.2% (improved AQI (US)) compared to previous years: 2020 (28), 2021 (31), 2022 (35), 2023 (34), 2024 (31), 2025 (40).
