Saku, 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
Saku, Nagano, Japan
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2024
61AQILowest AQI recorded on
9th Aug 2023
14AQISame Day Analysis (1st August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 36 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 31st Jul - 1st Aug 2026
Saku, Nagano, Japan
AQI
Day
Night
.
4 AM31st Jul 2026
7 PM
3 AM1st Aug 2026
Day time
Avg. Highest Time
6PM31st Jul
62AQI
Avg. Lowest Time
7AM31st Jul
22AQI
Night time
Avg. Highest Time
7PM31st Jul
62AQI
Avg. Lowest Time
2AM1st Aug
23AQI
In the last 24 hours,
Saku's AQI reached its highest point of 62 at 6 PM during the Day, while the lowest point, 22, was recorded at 7 AM during the Day between 31st Jul and 1st Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Saku, Nagano, Japan
JulAug
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st
Day
Night
3rd Jul 2026144 AMAQI
3rd Jul 2026105 AMAQI
3rd Jul 2026116 AMAQI
3rd Jul 2026177 AMAQI
3rd Jul 2026128 AMAQI
3rd Jul 2026129 AMAQI
3rd Jul 20261110 AMAQI
3rd Jul 20261611 AMAQI
3rd Jul 20261212 PMAQI
3rd Jul 2026261 PMAQI
3rd Jul 2026282 PMAQI
3rd Jul 2026403 PMAQI
3rd Jul 2026364 PMAQI
3rd Jul 2026305 PMAQI
3rd Jul 2026176 PMAQI
3rd Jul 2026197 PMAQI
3rd Jul 2026248 PMAQI
3rd Jul 2026219 PMAQI
3rd Jul 20262610 PMAQI
3rd Jul 20262611 PMAQI
4th Jul 20262812 AMAQI
4th Jul 2026281 AMAQI
4th Jul 2026262 AMAQI
4th Jul 2026253 AMAQI
18°C14/22°C
4th Jul 2026234 AMAQI
4th Jul 2026245 AMAQI
4th Jul 2026266 AMAQI
4th Jul 2026257 AMAQI
4th Jul 2026258 AMAQI
4th Jul 2026249 AMAQI
4th Jul 20262410 AMAQI
4th Jul 20262411 AMAQI
4th Jul 20262312 PMAQI
4th Jul 2026241 PMAQI
4th Jul 2026252 PMAQI
4th Jul 2026243 PMAQI
4th Jul 2026244 PMAQI
4th Jul 2026265 PMAQI
4th Jul 2026256 PMAQI
4th Jul 2026257 PMAQI
4th Jul 2026248 PMAQI
4th Jul 2026269 PMAQI
4th Jul 20262710 PMAQI
4th Jul 20262411 PMAQI
5th Jul 20262412 AMAQI
5th Jul 2026261 AMAQI
5th Jul 2026202 AMAQI
5th Jul 2026213 AMAQI
18°C14/22°C
5th Jul 2026204 AMAQI
5th Jul 2026235 AMAQI
5th Jul 2026226 AMAQI
5th Jul 2026207 AMAQI
5th Jul 2026208 AMAQI
5th Jul 2026169 AMAQI
5th Jul 20261910 AMAQI
5th Jul 20261611 AMAQI
5th Jul 20261712 PMAQI
5th Jul 2026161 PMAQI
5th Jul 2026182 PMAQI
5th Jul 2026233 PMAQI
5th Jul 2026224 PMAQI
5th Jul 2026225 PMAQI
5th Jul 2026216 PMAQI
5th Jul 2026167 PMAQI
5th Jul 2026208 PMAQI
5th Jul 2026189 PMAQI
5th Jul 20261810 PMAQI
5th Jul 20261611 PMAQI
6th Jul 2026812 AMAQI
6th Jul 2026231 AMAQI
6th Jul 2026242 AMAQI
6th Jul 2026203 AMAQI
19°C17/22°C
6th Jul 2026204 AMAQI
6th Jul 202695 AMAQI
6th Jul 2026156 AMAQI
6th Jul 2026107 AMAQI
6th Jul 2026178 AMAQI
6th Jul 2026169 AMAQI
6th Jul 20261710 AMAQI
6th Jul 20262411 AMAQI
6th Jul 20261512 PMAQI
6th Jul 202681 PMAQI
6th Jul 2026182 PMAQI
6th Jul 202683 PMAQI
6th Jul 2026124 PMAQI
6th Jul 2026145 PMAQI
6th Jul 2026186 PMAQI
6th Jul 202687 PMAQI
6th Jul 2026158 PMAQI
6th Jul 2026169 PMAQI
6th Jul 20261610 PMAQI
6th Jul 20261811 PMAQI
7th Jul 20261712 AMAQI
7th Jul 2026181 AMAQI
7th Jul 2026172 AMAQI
7th Jul 202683 AMAQI
17°C17/19°C
7th Jul 2026124 AMAQI
7th Jul 2026235 AMAQI
7th Jul 2026286 AMAQI
7th Jul 2026247 AMAQI
7th Jul 2026268 AMAQI
7th Jul 2026229 AMAQI
7th Jul 20262310 AMAQI
7th Jul 20262111 AMAQI
7th Jul 20262112 PMAQI
7th Jul 2026201 PMAQI
7th Jul 2026232 PMAQI
7th Jul 2026273 PMAQI
7th Jul 2026254 PMAQI
7th Jul 2026265 PMAQI
7th Jul 2026276 PMAQI
7th Jul 2026267 PMAQI
7th Jul 2026268 PMAQI
7th Jul 2026279 PMAQI
7th Jul 20262510 PMAQI
7th Jul 20262611 PMAQI
8th Jul 20262912 AMAQI
8th Jul 2026291 AMAQI
8th Jul 2026282 AMAQI
8th Jul 2026283 AMAQI
18°C16/24°C
8th Jul 2026264 AMAQI
8th Jul 2026275 AMAQI
8th Jul 2026286 AMAQI
8th Jul 2026277 AMAQI
8th Jul 2026298 AMAQI
8th Jul 2026249 AMAQI
8th Jul 20262510 AMAQI
8th Jul 20262311 AMAQI
8th Jul 20262412 PMAQI
8th Jul 2026241 PMAQI
8th Jul 2026242 PMAQI
8th Jul 2026253 PMAQI
8th Jul 2026264 PMAQI
8th Jul 2026245 PMAQI
8th Jul 2026246 PMAQI
8th Jul 2026227 PMAQI
8th Jul 2026208 PMAQI
8th Jul 2026239 PMAQI
8th Jul 20262410 PMAQI
8th Jul 20262611 PMAQI
9th Jul 20263012 AMAQI
9th Jul 2026281 AMAQI
9th Jul 2026292 AMAQI
9th Jul 2026283 AMAQI
21°C16/27°C
9th Jul 2026274 AMAQI
9th Jul 2026265 AMAQI
9th Jul 2026286 AMAQI
9th Jul 2026287 AMAQI
9th Jul 2026268 AMAQI
9th Jul 2026239 AMAQI
9th Jul 20262410 AMAQI
9th Jul 20262411 AMAQI
9th Jul 20262312 PMAQI
9th Jul 2026201 PMAQI
9th Jul 2026232 PMAQI
9th Jul 2026263 PMAQI
9th Jul 2026264 PMAQI
9th Jul 2026275 PMAQI
9th Jul 2026266 PMAQI
9th Jul 2026267 PMAQI
9th Jul 2026248 PMAQI
9th Jul 2026249 PMAQI
9th Jul 20262510 PMAQI
9th Jul 20262911 PMAQI
10th Jul 20262612 AMAQI
10th Jul 2026291 AMAQI
10th Jul 2026282 AMAQI
10th Jul 2026273 AMAQI
22°C14/29°C
10th Jul 2026264 AMAQI
10th Jul 2026305 AMAQI
10th Jul 2026286 AMAQI
10th Jul 2026277 AMAQI
10th Jul 2026298 AMAQI
10th Jul 2026289 AMAQI
10th Jul 20262910 AMAQI
10th Jul 20262711 AMAQI
10th Jul 20262912 PMAQI
10th Jul 2026261 PMAQI
10th Jul 2026242 PMAQI
10th Jul 2026253 PMAQI
10th Jul 2026274 PMAQI
10th Jul 2026295 PMAQI
10th Jul 2026306 PMAQI
10th Jul 2026307 PMAQI
10th Jul 2026308 PMAQI
10th Jul 2026309 PMAQI
10th Jul 20263110 PMAQI
10th Jul 20263111 PMAQI
11th Jul 20263212 AMAQI
11th Jul 2026311 AMAQI
11th Jul 2026322 AMAQI
11th Jul 2026313 AMAQI
23°C16/31°C
11th Jul 2026304 AMAQI
11th Jul 2026305 AMAQI
11th Jul 2026316 AMAQI
11th Jul 2026297 AMAQI
11th Jul 2026328 AMAQI
11th Jul 2026349 AMAQI
11th Jul 20263110 AMAQI
11th Jul 20262811 AMAQI
11th Jul 20262812 PMAQI
11th Jul 2026241 PMAQI
11th Jul 2026252 PMAQI
11th Jul 2026223 PMAQI
11th Jul 2026264 PMAQI
11th Jul 2026305 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026327 PMAQI
11th Jul 2026288 PMAQI
11th Jul 2026309 PMAQI
11th Jul 20263010 PMAQI
11th Jul 20263211 PMAQI
12th Jul 20263012 AMAQI
12th Jul 2026301 AMAQI
12th Jul 2026302 AMAQI
12th Jul 2026303 AMAQI
23°C17/30°C
12th Jul 2026294 AMAQI
12th Jul 2026285 AMAQI
12th Jul 2026286 AMAQI
12th Jul 2026307 AMAQI
12th Jul 2026288 AMAQI
12th Jul 2026309 AMAQI
12th Jul 20263010 AMAQI
12th Jul 20262611 AMAQI
12th Jul 20262612 PMAQI
12th Jul 2026241 PMAQI
12th Jul 2026242 PMAQI
12th Jul 2026223 PMAQI
12th Jul 2026244 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026306 PMAQI
12th Jul 2026307 PMAQI
12th Jul 2026288 PMAQI
12th Jul 2026289 PMAQI
12th Jul 20262910 PMAQI
12th Jul 20262811 PMAQI
13th Jul 20262812 AMAQI
13th Jul 2026301 AMAQI
13th Jul 2026302 AMAQI
13th Jul 2026273 AMAQI
21°C16/28°C
13th Jul 2026254 AMAQI
13th Jul 2026275 AMAQI
13th Jul 2026276 AMAQI
13th Jul 2026267 AMAQI
13th Jul 2026288 AMAQI
13th Jul 2026279 AMAQI
13th Jul 20262910 AMAQI
13th Jul 20262611 AMAQI
13th Jul 20262512 PMAQI
13th Jul 2026201 PMAQI
13th Jul 2026202 PMAQI
13th Jul 2026223 PMAQI
13th Jul 2026244 PMAQI
13th Jul 2026605 PMAQI
13th Jul 2026636 PMAQI
13th Jul 2026447 PMAQI
13th Jul 2026658 PMAQI
13th Jul 2026499 PMAQI
13th Jul 20263010 PMAQI
13th Jul 20263611 PMAQI
14th Jul 20263112 AMAQI
14th Jul 2026301 AMAQI
14th Jul 2026302 AMAQI
14th Jul 2026283 AMAQI
20°C16/26°C
14th Jul 2026264 AMAQI
14th Jul 2026125 AMAQI
14th Jul 2026296 AMAQI
14th Jul 2026287 AMAQI
14th Jul 2026268 AMAQI
14th Jul 2026239 AMAQI
14th Jul 20261810 AMAQI
14th Jul 20262111 AMAQI
14th Jul 20262912 PMAQI
14th Jul 2026351 PMAQI
14th Jul 2026202 PMAQI
14th Jul 2026383 PMAQI
14th Jul 2026404 PMAQI
14th Jul 2026425 PMAQI
14th Jul 2026426 PMAQI
14th Jul 2026297 PMAQI
14th Jul 2026618 PMAQI
14th Jul 2026509 PMAQI
14th Jul 20265410 PMAQI
14th Jul 20267111 PMAQI
15th Jul 20265212 AMAQI
15th Jul 2026581 AMAQI
15th Jul 2026472 AMAQI
15th Jul 2026383 AMAQI
23°C16/32°C
15th Jul 2026544 AMAQI
15th Jul 2026475 AMAQI
15th Jul 2026436 AMAQI
15th Jul 2026457 AMAQI
15th Jul 2026508 AMAQI
15th Jul 2026519 AMAQI
15th Jul 20265010 AMAQI
15th Jul 20262611 AMAQI
15th Jul 20264112 PMAQI
15th Jul 2026741 PMAQI
15th Jul 2026442 PMAQI
15th Jul 2026533 PMAQI
15th Jul 2026584 PMAQI
15th Jul 2026565 PMAQI
15th Jul 2026546 PMAQI
15th Jul 2026607 PMAQI
15th Jul 2026558 PMAQI
15th Jul 2026569 PMAQI
15th Jul 20265510 PMAQI
15th Jul 20265611 PMAQI
16th Jul 20265612 AMAQI
16th Jul 2026541 AMAQI
16th Jul 2026552 AMAQI
16th Jul 2026573 AMAQI
24°C17/33°C
16th Jul 2026564 AMAQI
16th Jul 2026565 AMAQI
16th Jul 2026586 AMAQI
16th Jul 2026547 AMAQI
16th Jul 2026528 AMAQI
16th Jul 2026529 AMAQI
16th Jul 20265510 AMAQI
16th Jul 20266011 AMAQI
16th Jul 20266912 PMAQI
16th Jul 2026701 PMAQI
16th Jul 2026532 PMAQI
16th Jul 2026663 PMAQI
16th Jul 2026564 PMAQI
16th Jul 2026685 PMAQI
16th Jul 2026486 PMAQI
16th Jul 2026487 PMAQI
16th Jul 2026548 PMAQI
16th Jul 2026509 PMAQI
16th Jul 20264110 PMAQI
16th Jul 20265311 PMAQI
17th Jul 20265012 AMAQI
17th Jul 2026211 AMAQI
17th Jul 2026212 AMAQI
17th Jul 2026203 AMAQI
23°C17/31°C
17th Jul 2026224 AMAQI
17th Jul 2026265 AMAQI
17th Jul 2026256 AMAQI
17th Jul 2026257 AMAQI
17th Jul 2026298 AMAQI
17th Jul 2026269 AMAQI
17th Jul 20262510 AMAQI
17th Jul 20262411 AMAQI
17th Jul 20263712 PMAQI
17th Jul 2026521 PMAQI
17th Jul 2026442 PMAQI
17th Jul 2026483 PMAQI
17th Jul 2026544 PMAQI
17th Jul 2026525 PMAQI
17th Jul 2026416 PMAQI
17th Jul 2026427 PMAQI
17th Jul 2026548 PMAQI
17th Jul 2026529 PMAQI
17th Jul 20263410 PMAQI
17th Jul 20261811 PMAQI
18th Jul 20262412 AMAQI
18th Jul 2026221 AMAQI
18th Jul 2026222 AMAQI
18th Jul 2026243 AMAQI
23°C19/28°C
18th Jul 2026274 AMAQI
18th Jul 2026225 AMAQI
18th Jul 2026266 AMAQI
18th Jul 2026267 AMAQI
18th Jul 2026188 AMAQI
18th Jul 2026269 AMAQI
18th Jul 20261410 AMAQI
18th Jul 20261811 AMAQI
18th Jul 20261612 PMAQI
18th Jul 2026241 PMAQI
18th Jul 2026302 PMAQI
18th Jul 2026393 PMAQI
18th Jul 2026484 PMAQI
18th Jul 2026555 PMAQI
18th Jul 2026526 PMAQI
18th Jul 2026507 PMAQI
18th Jul 2026428 PMAQI
18th Jul 2026349 PMAQI
18th Jul 20263410 PMAQI
18th Jul 20263011 PMAQI
19th Jul 20262712 AMAQI
19th Jul 2026281 AMAQI
19th Jul 2026292 AMAQI
19th Jul 2026283 AMAQI
21°C19/23°C
19th Jul 2026284 AMAQI
19th Jul 2026275 AMAQI
19th Jul 2026266 AMAQI
19th Jul 2026267 AMAQI
19th Jul 2026288 AMAQI
19th Jul 2026309 AMAQI
19th Jul 20262710 AMAQI
19th Jul 20262411 AMAQI
19th Jul 20263612 PMAQI
19th Jul 2026441 PMAQI
19th Jul 2026502 PMAQI
19th Jul 2026503 PMAQI
19th Jul 2026534 PMAQI
19th Jul 2026565 PMAQI
19th Jul 2026506 PMAQI
19th Jul 2026467 PMAQI
19th Jul 2026408 PMAQI
19th Jul 2026389 PMAQI
19th Jul 20264110 PMAQI
19th Jul 20263611 PMAQI
20th Jul 20263012 AMAQI
20th Jul 2026271 AMAQI
20th Jul 2026262 AMAQI
20th Jul 2026293 AMAQI
23°C19/30°C
20th Jul 2026264 AMAQI
20th Jul 2026255 AMAQI
20th Jul 2026326 AMAQI
20th Jul 2026307 AMAQI
20th Jul 2026268 AMAQI
20th Jul 2026309 AMAQI
20th Jul 20263110 AMAQI
20th Jul 20263011 AMAQI
20th Jul 20263912 PMAQI
20th Jul 2026451 PMAQI
20th Jul 2026302 PMAQI
20th Jul 2026303 PMAQI
20th Jul 2026304 PMAQI
20th Jul 2026425 PMAQI
20th Jul 2026406 PMAQI
20th Jul 2026397 PMAQI
20th Jul 2026378 PMAQI
20th Jul 2026389 PMAQI
20th Jul 20263710 PMAQI
20th Jul 20263811 PMAQI
21st Jul 20263112 AMAQI
21st Jul 2026351 AMAQI
21st Jul 2026372 AMAQI
21st Jul 2026363 AMAQI
24°C18/31°C
21st Jul 2026344 AMAQI
21st Jul 2026455 AMAQI
21st Jul 2026446 AMAQI
21st Jul 2026587 AMAQI
21st Jul 2026608 AMAQI
21st Jul 2026629 AMAQI
21st Jul 20266010 AMAQI
21st Jul 20265311 AMAQI
21st Jul 2026571 PMAQI
21st Jul 2026682 PMAQI
21st Jul 2026653 PMAQI
21st Jul 2026664 PMAQI
21st Jul 2026665 PMAQI
21st Jul 2026656 PMAQI
21st Jul 2026937 PMAQI
21st Jul 2026648 PMAQI
21st Jul 2026629 PMAQI
21st Jul 20266110 PMAQI
21st Jul 20265811 PMAQI
22nd Jul 20265612 AMAQI
22nd Jul 2026531 AMAQI
22nd Jul 2026562 AMAQI
22nd Jul 2026563 AMAQI
24°C18/32°C
22nd Jul 2026544 AMAQI
22nd Jul 2026455 AMAQI
22nd Jul 2026436 AMAQI
22nd Jul 2026427 AMAQI
22nd Jul 2026418 AMAQI
22nd Jul 2026419 AMAQI
22nd Jul 20264710 AMAQI
22nd Jul 20265611 AMAQI
22nd Jul 20266612 PMAQI
22nd Jul 2026781 PMAQI
22nd Jul 2026782 PMAQI
22nd Jul 2026783 PMAQI
22nd Jul 2026804 PMAQI
22nd Jul 2026785 PMAQI
22nd Jul 2026776 PMAQI
22nd Jul 2026787 PMAQI
22nd Jul 2026768 PMAQI
22nd Jul 2026719 PMAQI
22nd Jul 20267310 PMAQI
22nd Jul 20267611 PMAQI
23rd Jul 20267412 AMAQI
23rd Jul 2026861 AMAQI
23rd Jul 2026742 AMAQI
23rd Jul 2026753 AMAQI
24°C17/34°C
23rd Jul 2026744 AMAQI
23rd Jul 2026685 AMAQI
23rd Jul 2026646 AMAQI
23rd Jul 2026607 AMAQI
23rd Jul 2026598 AMAQI
23rd Jul 2026599 AMAQI
23rd Jul 20266010 AMAQI
23rd Jul 20266911 AMAQI
23rd Jul 20266412 PMAQI
23rd Jul 2026581 PMAQI
23rd Jul 2026562 PMAQI
23rd Jul 2026423 PMAQI
23rd Jul 2026464 PMAQI
23rd Jul 2026505 PMAQI
23rd Jul 2026536 PMAQI
23rd Jul 2026497 PMAQI
23rd Jul 2026488 PMAQI
23rd Jul 2026559 PMAQI
23rd Jul 20266810 PMAQI
23rd Jul 20266011 PMAQI
24th Jul 20265412 AMAQI
24th Jul 2026491 AMAQI
24th Jul 2026482 AMAQI
24th Jul 2026413 AMAQI
25°C19/33°C
24th Jul 2026344 AMAQI
24th Jul 2026365 AMAQI
24th Jul 2026326 AMAQI
24th Jul 2026347 AMAQI
24th Jul 2026388 AMAQI
24th Jul 2026369 AMAQI
24th Jul 20263610 AMAQI
24th Jul 20265411 AMAQI
24th Jul 20266512 PMAQI
24th Jul 2026581 PMAQI
24th Jul 2026622 PMAQI
24th Jul 2026563 PMAQI
24th Jul 2026374 PMAQI
24th Jul 2026445 PMAQI
24th Jul 2026606 PMAQI
24th Jul 2026617 PMAQI
24th Jul 2026588 PMAQI
24th Jul 2026609 PMAQI
24th Jul 20266010 PMAQI
24th Jul 20265811 PMAQI
25th Jul 20265512 AMAQI
25th Jul 2026481 AMAQI
25th Jul 2026402 AMAQI
25th Jul 2026363 AMAQI
23°C18/32°C
25th Jul 2026364 AMAQI
25th Jul 2026345 AMAQI
25th Jul 2026366 AMAQI
25th Jul 2026287 AMAQI
25th Jul 2026368 AMAQI
25th Jul 2026329 AMAQI
25th Jul 20263610 AMAQI
25th Jul 20264311 AMAQI
25th Jul 20265612 PMAQI
25th Jul 2026571 PMAQI
25th Jul 2026562 PMAQI
25th Jul 2026673 PMAQI
25th Jul 2026594 PMAQI
25th Jul 2026575 PMAQI
25th Jul 2026606 PMAQI
25th Jul 2026427 PMAQI
25th Jul 2026328 PMAQI
25th Jul 2026329 PMAQI
25th Jul 20264410 PMAQI
25th Jul 20265211 PMAQI
26th Jul 20264812 AMAQI
26th Jul 2026451 AMAQI
26th Jul 2026402 AMAQI
26th Jul 2026403 AMAQI
23°C17/32°C
26th Jul 2026324 AMAQI
26th Jul 2026355 AMAQI
26th Jul 2026286 AMAQI
26th Jul 2026347 AMAQI
26th Jul 2026348 AMAQI
26th Jul 2026329 AMAQI
26th Jul 20263710 AMAQI
26th Jul 20263411 AMAQI
26th Jul 20264712 PMAQI
26th Jul 2026541 PMAQI
26th Jul 2026562 PMAQI
26th Jul 2026573 PMAQI
26th Jul 2026454 PMAQI
26th Jul 2026465 PMAQI
26th Jul 2026406 PMAQI
26th Jul 2026487 PMAQI
26th Jul 2026478 PMAQI
26th Jul 2026449 PMAQI
26th Jul 20264310 PMAQI
26th Jul 20264111 PMAQI
27th Jul 20262912 AMAQI
27th Jul 2026251 AMAQI
27th Jul 2026222 AMAQI
27th Jul 2026263 AMAQI
22°C17/28°C
27th Jul 2026404 AMAQI
27th Jul 2026455 AMAQI
27th Jul 2026446 AMAQI
27th Jul 2026477 AMAQI
27th Jul 2026358 AMAQI
27th Jul 2026499 AMAQI
27th Jul 20262610 AMAQI
27th Jul 20262311 AMAQI
27th Jul 20263012 PMAQI
27th Jul 2026301 PMAQI
27th Jul 2026242 PMAQI
27th Jul 2026263 PMAQI
27th Jul 2026284 PMAQI
27th Jul 2026235 PMAQI
27th Jul 2026316 PMAQI
27th Jul 2026277 PMAQI
27th Jul 2026308 PMAQI
27th Jul 2026349 PMAQI
27th Jul 20263210 PMAQI
27th Jul 20262911 PMAQI
28th Jul 20262412 AMAQI
28th Jul 2026241 AMAQI
28th Jul 2026252 AMAQI
28th Jul 2026283 AMAQI
21°C15/27°C
28th Jul 2026234 AMAQI
28th Jul 2026325 AMAQI
28th Jul 2026266 AMAQI
28th Jul 2026327 AMAQI
28th Jul 2026368 AMAQI
28th Jul 2026239 AMAQI
28th Jul 20262610 AMAQI
28th Jul 20263611 AMAQI
28th Jul 20263212 PMAQI
28th Jul 2026281 PMAQI
28th Jul 2026542 PMAQI
28th Jul 2026543 PMAQI
28th Jul 2026504 PMAQI
28th Jul 2026415 PMAQI
28th Jul 2026346 PMAQI
28th Jul 2026287 PMAQI
28th Jul 2026348 PMAQI
28th Jul 2026349 PMAQI
28th Jul 20264410 PMAQI
28th Jul 20263411 PMAQI
29th Jul 20265812 AMAQI
29th Jul 2026341 AMAQI
29th Jul 2026212 AMAQI
29th Jul 2026273 AMAQI
19°C16/24°C
29th Jul 2026254 AMAQI
29th Jul 2026235 AMAQI
29th Jul 2026256 AMAQI
29th Jul 2026237 AMAQI
29th Jul 2026258 AMAQI
29th Jul 2026239 AMAQI
29th Jul 20262310 AMAQI
29th Jul 20262311 AMAQI
29th Jul 20262812 PMAQI
29th Jul 2026341 PMAQI
29th Jul 2026322 PMAQI
29th Jul 2026363 PMAQI
29th Jul 2026304 PMAQI
29th Jul 2026385 PMAQI
29th Jul 2026386 PMAQI
29th Jul 2026387 PMAQI
29th Jul 2026468 PMAQI
29th Jul 2026449 PMAQI
29th Jul 20264510 PMAQI
29th Jul 20264111 PMAQI
30th Jul 20263612 AMAQI
30th Jul 2026361 AMAQI
30th Jul 2026282 AMAQI
30th Jul 2026223 AMAQI
20°C14/29°C
30th Jul 2026284 AMAQI
30th Jul 2026275 AMAQI
30th Jul 2026236 AMAQI
30th Jul 2026217 AMAQI
30th Jul 2026218 AMAQI
30th Jul 2026229 AMAQI
30th Jul 20262110 AMAQI
30th Jul 20262411 AMAQI
30th Jul 20262612 PMAQI
30th Jul 2026321 PMAQI
30th Jul 2026372 PMAQI
30th Jul 2026283 PMAQI
30th Jul 2026344 PMAQI
30th Jul 2026325 PMAQI
30th Jul 2026296 PMAQI
30th Jul 2026297 PMAQI
30th Jul 2026298 PMAQI
30th Jul 2026449 PMAQI
30th Jul 20264510 PMAQI
30th Jul 20263711 PMAQI
31st Jul 20263812 AMAQI
31st Jul 2026381 AMAQI
31st Jul 2026362 AMAQI
31st Jul 2026373 AMAQI
23°C15/31°C
31st Jul 2026384 AMAQI
31st Jul 2026245 AMAQI
31st Jul 2026226 AMAQI
31st Jul 2026227 AMAQI
31st Jul 2026258 AMAQI
31st Jul 2026289 AMAQI
31st Jul 20262710 AMAQI
31st Jul 20264011 AMAQI
31st Jul 20265212 PMAQI
31st Jul 2026541 PMAQI
31st Jul 2026552 PMAQI
31st Jul 2026563 PMAQI
31st Jul 2026564 PMAQI
31st Jul 2026605 PMAQI
31st Jul 2026626 PMAQI
31st Jul 2026627 PMAQI
31st Jul 2026408 PMAQI
31st Jul 2026349 PMAQI
31st Jul 20263410 PMAQI
31st Jul 20263411 PMAQI
1st Aug 20262812 AMAQI
1st Aug 2026271 AMAQI
1st Aug 2026232 AMAQI
1st Aug 2026433 AMAQI
22°C16/31°C
1st Aug 2026344 AMAQI
4 AM1st Aug 2026315 AMAQI
1st Aug 2026366 AMAQI
1st Aug 2026427 AMAQI
1st Aug 2026368 AMAQI
1st Aug 2026349 AMAQI
1st Aug 20263910 AMAQI
1st Aug 20264211 AMAQI
11 AM1st Aug 20264212 PMAQI
1st Aug 2026421 PMAQI
1st Aug 2026362 PMAQI
1st Aug 2026343 PMAQI
1st Aug 2026384 PMAQI
1st Aug 2026375 PMAQI
1st Aug 2026346 PMAQI
1st Aug 2026367 PMAQI
7 PM1st Aug 2026348 PMAQI
1st Aug 2026369 PMAQI
1st Aug 20263410 PMAQI
1st Aug 20263411 PMAQI
11 PM3 AM
23°C16/31°C
Day time
Avg. Highest Time
5 PM - 6 PM
42AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
4 AM - 7 AM
31AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 PM to 6 PM (Avg. 42), while the lowest AQI was between 4 AM to 7 AM (Avg. 31).
Night time
Avg. Highest Time
8 PM - 11 PM
39AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
2 AM - 3 AM
32AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 11 PM (Avg. 39), while the lowest AQI was between 2 AM to 3 AM (Avg. 32).
2026 Days Vs Air Quality
Saku, Nagano, Japan
2026
85%
181
15%
32
Total number of days with different AQI categories in last 213 days in 2026 (152 days remaining)
Good
181 DaysModerate
32 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 213 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Saku, 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
12AQI (US)
12AQI (US)
2nd January 2026
14AQI (US)
14AQI (US)
3rd January 2026
12AQI (US)
12AQI (US)
4th January 2026
16AQI (US)
16AQI (US)
5th January 2026
24AQI (US)
24AQI (US)
6th January 2026
22AQI (US)
22AQI (US)
7th January 2026
26AQI (US)
26AQI (US)
8th January 2026
23AQI (US)
23AQI (US)
9th January 2026
17AQI (US)
17AQI (US)
10th January 2026
30AQI (US)
30AQI (US)
11th January 2026
24AQI (US)
24AQI (US)
12th January 2026
13AQI (US)
13AQI (US)
13th January 2026
22AQI (US)
22AQI (US)
14th January 2026
12AQI (US)
12AQI (US)
15th January 2026
32AQI (US)
32AQI (US)
16th January 2026
46AQI (US)
46AQI (US)
17th January 2026
52AQI (US)
52AQI (US)
18th January 2026
33AQI (US)
33AQI (US)
19th January 2026
52AQI (US)
52AQI (US)
20th January 2026
30AQI (US)
30AQI (US)
21st January 2026
12AQI (US)
12AQI (US)
22nd January 2026
18AQI (US)
18AQI (US)
23rd January 2026
26AQI (US)
26AQI (US)
24th January 2026
40AQI (US)
40AQI (US)
25th January 2026
42AQI (US)
42AQI (US)
26th January 2026
22AQI (US)
22AQI (US)
27th January 2026
40AQI (US)
40AQI (US)
28th January 2026
28AQI (US)
28AQI (US)
29th January 2026
30AQI (US)
30AQI (US)
30th January 2026
41AQI (US)
41AQI (US)
31st January 2026
17AQI (US)
17AQI (US)
1st February 2026
36AQI (US)
36AQI (US)
2nd February 2026
43AQI (US)
43AQI (US)
3rd February 2026
30AQI (US)
30AQI (US)
4th February 2026
26AQI (US)
26AQI (US)
5th February 2026
52AQI (US)
52AQI (US)
6th February 2026
53AQI (US)
53AQI (US)
7th February 2026
13AQI (US)
13AQI (US)
8th February 2026
11AQI (US)
11AQI (US)
9th February 2026
30AQI (US)
30AQI (US)
10th February 2026
36AQI (US)
36AQI (US)
11th February 2026
42AQI (US)
42AQI (US)
12th February 2026
50AQI (US)
50AQI (US)
13th February 2026
65AQI (US)
65AQI (US)
14th February 2026
58AQI (US)
58AQI (US)
15th February 2026
58AQI (US)
58AQI (US)
16th February 2026
56AQI (US)
56AQI (US)
17th February 2026
22AQI (US)
22AQI (US)
18th February 2026
25AQI (US)
25AQI (US)
19th February 2026
50AQI (US)
50AQI (US)
20th February 2026
32AQI (US)
32AQI (US)
21st February 2026
54AQI (US)
54AQI (US)
22nd February 2026
46AQI (US)
46AQI (US)
23rd February 2026
52AQI (US)
52AQI (US)
24th February 2026
51AQI (US)
51AQI (US)
25th February 2026
20AQI (US)
20AQI (US)
26th February 2026
9AQI (US)
9AQI (US)
27th February 2026
16AQI (US)
16AQI (US)
28th February 2026
18AQI (US)
18AQI (US)
1st March 2026
34AQI (US)
34AQI (US)
2nd March 2026
52AQI (US)
52AQI (US)
3rd March 2026
34AQI (US)
34AQI (US)
4th March 2026
16AQI (US)
16AQI (US)
5th March 2026
51AQI (US)
51AQI (US)
6th March 2026
41AQI (US)
41AQI (US)
7th March 2026
37AQI (US)
37AQI (US)
8th March 2026
36AQI (US)
36AQI (US)
9th March 2026
41AQI (US)
41AQI (US)
10th March 2026
50AQI (US)
50AQI (US)
11th March 2026
50AQI (US)
50AQI (US)
12th March 2026
55AQI (US)
55AQI (US)
13th March 2026
34AQI (US)
34AQI (US)
14th March 2026
40AQI (US)
40AQI (US)
15th March 2026
46AQI (US)
46AQI (US)
16th March 2026
46AQI (US)
46AQI (US)
17th March 2026
44AQI (US)
44AQI (US)
18th March 2026
57AQI (US)
57AQI (US)
19th March 2026
23AQI (US)
23AQI (US)
20th March 2026
39AQI (US)
39AQI (US)
21st March 2026
48AQI (US)
48AQI (US)
22nd March 2026
54AQI (US)
54AQI (US)
23rd March 2026
50AQI (US)
50AQI (US)
24th March 2026
47AQI (US)
47AQI (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
58AQI (US)
58AQI (US)
29th March 2026
66AQI (US)
66AQI (US)
30th March 2026
42AQI (US)
42AQI (US)
31st March 2026
24AQI (US)
24AQI (US)
1st April 2026
11AQI (US)
11AQI (US)
2nd April 2026
16AQI (US)
16AQI (US)
3rd April 2026
46AQI (US)
46AQI (US)
4th April 2026
40AQI (US)
40AQI (US)
5th April 2026
16AQI (US)
16AQI (US)
6th April 2026
40AQI (US)
40AQI (US)
7th April 2026
36AQI (US)
36AQI (US)
8th April 2026
28AQI (US)
28AQI (US)
9th April 2026
25AQI (US)
25AQI (US)
10th April 2026
33AQI (US)
33AQI (US)
11th April 2026
30AQI (US)
30AQI (US)
12th April 2026
29AQI (US)
29AQI (US)
13th April 2026
29AQI (US)
29AQI (US)
14th April 2026
45AQI (US)
45AQI (US)
15th April 2026
24AQI (US)
24AQI (US)
16th April 2026
26AQI (US)
26AQI (US)
17th April 2026
30AQI (US)
30AQI (US)
18th April 2026
36AQI (US)
36AQI (US)
19th April 2026
33AQI (US)
33AQI (US)
20th April 2026
35AQI (US)
35AQI (US)
21st April 2026
32AQI (US)
32AQI (US)
22nd April 2026
33AQI (US)
33AQI (US)
23rd April 2026
26AQI (US)
26AQI (US)
24th April 2026
18AQI (US)
18AQI (US)
25th April 2026
26AQI (US)
26AQI (US)
26th April 2026
38AQI (US)
38AQI (US)
27th April 2026
38AQI (US)
38AQI (US)
28th April 2026
34AQI (US)
34AQI (US)
29th April 2026
30AQI (US)
30AQI (US)
30th April 2026
23AQI (US)
23AQI (US)
1st May 2026
23AQI (US)
23AQI (US)
2nd May 2026
46AQI (US)
46AQI (US)
3rd May 2026
52AQI (US)
52AQI (US)
4th May 2026
23AQI (US)
23AQI (US)
5th May 2026
22AQI (US)
22AQI (US)
6th May 2026
28AQI (US)
28AQI (US)
7th May 2026
31AQI (US)
31AQI (US)
8th May 2026
28AQI (US)
28AQI (US)
9th May 2026
24AQI (US)
24AQI (US)
10th May 2026
32AQI (US)
32AQI (US)
11th May 2026
25AQI (US)
25AQI (US)
12th May 2026
26AQI (US)
26AQI (US)
13th May 2026
37AQI (US)
37AQI (US)
14th May 2026
31AQI (US)
31AQI (US)
15th May 2026
32AQI (US)
32AQI (US)
16th May 2026
84AQI (US)
84AQI (US)
17th May 2026
68AQI (US)
68AQI (US)
18th May 2026
54AQI (US)
54AQI (US)
19th May 2026
48AQI (US)
48AQI (US)
20th May 2026
62AQI (US)
62AQI (US)
21st May 2026
60AQI (US)
60AQI (US)
22nd May 2026
62AQI (US)
62AQI (US)
23rd May 2026
55AQI (US)
55AQI (US)
24th May 2026
60AQI (US)
60AQI (US)
25th May 2026
50AQI (US)
50AQI (US)
26th May 2026
39AQI (US)
39AQI (US)
27th May 2026
20AQI (US)
20AQI (US)
28th May 2026
28AQI (US)
28AQI (US)
29th May 2026
24AQI (US)
24AQI (US)
30th May 2026
21AQI (US)
21AQI (US)
31st May 2026
32AQI (US)
32AQI (US)
1st June 2026
37AQI (US)
37AQI (US)
2nd June 2026
24AQI (US)
24AQI (US)
3rd June 2026
17AQI (US)
17AQI (US)
4th June 2026
10AQI (US)
10AQI (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
22AQI (US)
22AQI (US)
11th June 2026
24AQI (US)
24AQI (US)
12th June 2026
24AQI (US)
24AQI (US)
13th June 2026
24AQI (US)
24AQI (US)
14th June 2026
23AQI (US)
23AQI (US)
15th June 2026
19AQI (US)
19AQI (US)
16th June 2026
24AQI (US)
24AQI (US)
17th June 2026
24AQI (US)
24AQI (US)
18th June 2026
24AQI (US)
24AQI (US)
19th June 2026
26AQI (US)
26AQI (US)
20th June 2026
23AQI (US)
23AQI (US)
21st June 2026
16AQI (US)
16AQI (US)
22nd June 2026
15AQI (US)
15AQI (US)
23rd June 2026
18AQI (US)
18AQI (US)
24th June 2026
20AQI (US)
20AQI (US)
25th June 2026
23AQI (US)
23AQI (US)
26th June 2026
26AQI (US)
26AQI (US)
27th June 2026
22AQI (US)
22AQI (US)
28th June 2026
24AQI (US)
24AQI (US)
29th June 2026
26AQI (US)
26AQI (US)
30th June 2026
38AQI (US)
38AQI (US)
1st July 2026
41AQI (US)
41AQI (US)
2nd July 2026
17AQI (US)
17AQI (US)
3rd July 2026
19AQI (US)
19AQI (US)
4th July 2026
25AQI (US)
25AQI (US)
5th July 2026
20AQI (US)
20AQI (US)
6th July 2026
16AQI (US)
16AQI (US)
7th July 2026
22AQI (US)
22AQI (US)
8th July 2026
26AQI (US)
26AQI (US)
9th July 2026
26AQI (US)
26AQI (US)
10th July 2026
28AQI (US)
28AQI (US)
11th July 2026
30AQI (US)
30AQI (US)
12th July 2026
28AQI (US)
28AQI (US)
13th July 2026
33AQI (US)
33AQI (US)
14th July 2026
34AQI (US)
34AQI (US)
15th July 2026
51AQI (US)
51AQI (US)
16th July 2026
56AQI (US)
56AQI (US)
17th July 2026
36AQI (US)
36AQI (US)
18th July 2026
30AQI (US)
30AQI (US)
19th July 2026
36AQI (US)
36AQI (US)
20th July 2026
33AQI (US)
33AQI (US)
21st July 2026
56AQI (US)
56AQI (US)
22nd July 2026
62AQI (US)
62AQI (US)
23rd July 2026
61AQI (US)
61AQI (US)
24th July 2026
49AQI (US)
49AQI (US)
25th July 2026
44AQI (US)
44AQI (US)
26th July 2026
42AQI (US)
42AQI (US)
27th July 2026
32AQI (US)
32AQI (US)
28th July 2026
34AQI (US)
34AQI (US)
29th July 2026
32AQI (US)
32AQI (US)
30th July 2026
30AQI (US)
30AQI (US)
31st July 2026
40AQI (US)
40AQI (US)
1st August 2026
36AQI (US)
36AQI (US)
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
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
27AQI (US)
38AQI (US)
42AQI (US)
30AQI (US)
40AQI (US)
22AQI (US)
35AQI (US)
36AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202633AQI (US)
29
2
19
9
24
7
30
22
9
30
26
5
1
181
32
Highest AQI (US) recorded in
March42AQI (US)
Lowest AQI (US) recorded in
June22AQI (US)
202539AQI (US)
31
28
26
5
25
5
27
4
25
5
22
9
26
5
30
29
2
24
6
30
1
323
42
Highest AQI (US) recorded in
July48AQI (US)
Lowest AQI (US) recorded in
January32AQI (US)
202432AQI (US)
31
29
29
1
30
29
2
23
7
29
2
27
4
27
3
31
30
31
346
19
Highest AQI (US) recorded in
June43AQI (US)
Lowest AQI (US) recorded in
January24AQI (US)
202331AQI (US)
30
28
28
3
27
3
26
5
27
3
21
10
31
30
31
29
31
339
24
Highest AQI (US) recorded in
July43AQI (US)
Lowest AQI (US) recorded in
September22AQI (US)
202234AQI (US)
29
21
28
3
23
6
26
5
24
6
17
4
1
28
29
2
29
1
31
286
27
Highest AQI (US) recorded in
April43AQI (US)
Lowest AQI (US) recorded in
August16AQI (US)
202130AQI (US)
30
27
1
28
1
21
30
1
26
4
26
5
30
1
30
31
28
2
31
338
15
Highest AQI (US) recorded in
June41AQI (US)
Lowest AQI (US) recorded in
January21AQI (US)
202028AQI (US)
13
19
2
18
25
5
30
1
21
10
19
28
3
24
6
31
228
27
Highest AQI (US) recorded in
August46AQI (US)
Lowest AQI (US) recorded in
July17AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2025(Avg.)
39AQI (US)Least Polluted Year Recorded
2020(Avg.)
28AQI (US)Saku's annual 2026 AQI (US) (33) shows an average percentage change of 3.1% (worsened AQI (US)) compared to previous years: 2020 (28), 2021 (30), 2022 (34), 2023 (31), 2024 (32), 2025 (39).
