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
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
3rd Aug 2024
58AQILowest AQI recorded on
22nd Aug 2021
9AQISame Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 47 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Arai, Ina, Nagano, Japan
AQI
Day
Night
.
4 AM4th Aug 2025
7 PM
3 AM5th Aug 2025
Day time
Avg. Highest Time
4PM4th Aug
91AQI
Avg. Lowest Time
7AM4th Aug
46AQI
Night time
Avg. Highest Time
7PM4th Aug
68AQI
Avg. Lowest Time
3AM5th Aug
44AQI
In the last 24 hours,
Arai's AQI reached its highest point of 91 at 4 PM during the Day, while the lowest point, 44, was recorded at 3 AM during the Night between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Arai, Ina, Nagano, Japan
JulAug
06th - 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 - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
6th Jul 2025524 AMAQI
6th Jul 2025545 AMAQI
6th Jul 2025536 AMAQI
6th Jul 2025537 AMAQI
6th Jul 2025538 AMAQI
6th Jul 2025569 AMAQI
6th Jul 20256510 AMAQI
6th Jul 20256911 AMAQI
6th Jul 20256712 PMAQI
6th Jul 2025571 PMAQI
6th Jul 2025562 PMAQI
6th Jul 2025543 PMAQI
6th Jul 2025524 PMAQI
6th Jul 2025545 PMAQI
6th Jul 2025516 PMAQI
6th Jul 2025517 PMAQI
6th Jul 2025548 PMAQI
6th Jul 2025559 PMAQI
6th Jul 20255410 PMAQI
6th Jul 20255411 PMAQI
7th Jul 20255412 AMAQI
7th Jul 2025531 AMAQI
7th Jul 2025542 AMAQI
7th Jul 2025543 AMAQI
20°C13/24°C
7th Jul 2025544 AMAQI
7th Jul 2025555 AMAQI
7th Jul 2025546 AMAQI
7th Jul 2025557 AMAQI
7th Jul 2025558 AMAQI
7th Jul 2025559 AMAQI
7th Jul 20255810 AMAQI
7th Jul 20256211 AMAQI
7th Jul 20256112 PMAQI
7th Jul 2025601 PMAQI
7th Jul 2025602 PMAQI
7th Jul 2025603 PMAQI
7th Jul 2025574 PMAQI
7th Jul 2025615 PMAQI
7th Jul 2025646 PMAQI
7th Jul 2025737 PMAQI
7th Jul 2025698 PMAQI
7th Jul 2025669 PMAQI
7th Jul 20256510 PMAQI
7th Jul 20256311 PMAQI
8th Jul 20256112 AMAQI
8th Jul 2025581 AMAQI
8th Jul 2025542 AMAQI
8th Jul 2025543 AMAQI
20°C15/23°C
8th Jul 2025554 AMAQI
8th Jul 2025565 AMAQI
8th Jul 2025556 AMAQI
8th Jul 2025557 AMAQI
8th Jul 2025558 AMAQI
8th Jul 2025589 AMAQI
8th Jul 20256110 AMAQI
8th Jul 20256611 AMAQI
8th Jul 20256112 PMAQI
8th Jul 2025621 PMAQI
8th Jul 2025622 PMAQI
8th Jul 2025603 PMAQI
8th Jul 2025604 PMAQI
8th Jul 2025645 PMAQI
8th Jul 2025676 PMAQI
8th Jul 2025697 PMAQI
8th Jul 2025708 PMAQI
8th Jul 2025709 PMAQI
8th Jul 20257010 PMAQI
8th Jul 20256911 PMAQI
9th Jul 20256812 AMAQI
9th Jul 2025631 AMAQI
9th Jul 2025582 AMAQI
9th Jul 2025573 AMAQI
20°C15/22°C
9th Jul 2025584 AMAQI
9th Jul 2025585 AMAQI
9th Jul 2025586 AMAQI
9th Jul 2025587 AMAQI
9th Jul 2025588 AMAQI
9th Jul 2025659 AMAQI
9th Jul 20256710 AMAQI
9th Jul 20256211 AMAQI
9th Jul 20256412 PMAQI
9th Jul 2025671 PMAQI
9th Jul 2025722 PMAQI
9th Jul 2025743 PMAQI
9th Jul 2025874 PMAQI
9th Jul 2025785 PMAQI
9th Jul 2025776 PMAQI
9th Jul 2025797 PMAQI
9th Jul 2025718 PMAQI
9th Jul 2025719 PMAQI
9th Jul 20257010 PMAQI
9th Jul 20256111 PMAQI
10th Jul 20255812 AMAQI
10th Jul 2025571 AMAQI
10th Jul 2025562 AMAQI
10th Jul 2025603 AMAQI
19°C12/23°C
10th Jul 2025604 AMAQI
10th Jul 2025635 AMAQI
10th Jul 2025636 AMAQI
10th Jul 2025627 AMAQI
10th Jul 2025648 AMAQI
10th Jul 2025589 AMAQI
10th Jul 20256110 AMAQI
10th Jul 20256711 AMAQI
10th Jul 20257812 PMAQI
10th Jul 2025761 PMAQI
10th Jul 2025742 PMAQI
10th Jul 2025723 PMAQI
10th Jul 2025704 PMAQI
10th Jul 2025645 PMAQI
10th Jul 2025646 PMAQI
10th Jul 2025547 PMAQI
10th Jul 2025568 PMAQI
10th Jul 2025569 PMAQI
10th Jul 20255410 PMAQI
10th Jul 20255311 PMAQI
11th Jul 20255312 AMAQI
11th Jul 2025541 AMAQI
11th Jul 2025542 AMAQI
11th Jul 2025543 AMAQI
22°C13/29°C
11th Jul 2025624 AMAQI
11th Jul 2025625 AMAQI
11th Jul 2025626 AMAQI
11th Jul 2025627 AMAQI
11th Jul 2025628 AMAQI
11th Jul 2025289 AMAQI
11th Jul 20252010 AMAQI
11th Jul 20252011 AMAQI
11th Jul 20252212 PMAQI
11th Jul 2025301 PMAQI
11th Jul 2025382 PMAQI
11th Jul 2025373 PMAQI
11th Jul 2025414 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025376 PMAQI
11th Jul 2025367 PMAQI
11th Jul 2025448 PMAQI
11th Jul 2025529 PMAQI
11th Jul 20255310 PMAQI
11th Jul 20255211 PMAQI
12th Jul 20255312 AMAQI
12th Jul 2025521 AMAQI
12th Jul 2025552 AMAQI
12th Jul 2025583 AMAQI
22°C17/27°C
12th Jul 2025574 AMAQI
12th Jul 2025555 AMAQI
12th Jul 2025566 AMAQI
12th Jul 2025567 AMAQI
12th Jul 2025568 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20252410 AMAQI
12th Jul 20252611 AMAQI
12th Jul 20253112 PMAQI
12th Jul 2025381 PMAQI
12th Jul 2025382 PMAQI
12th Jul 2025363 PMAQI
12th Jul 2025394 PMAQI
12th Jul 2025425 PMAQI
12th Jul 2025426 PMAQI
12th Jul 2025497 PMAQI
12th Jul 2025528 PMAQI
12th Jul 2025549 PMAQI
12th Jul 20255410 PMAQI
12th Jul 20255311 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025521 AMAQI
13th Jul 2025562 AMAQI
13th Jul 2025563 AMAQI
22°C18/27°C
13th Jul 2025564 AMAQI
13th Jul 2025545 AMAQI
13th Jul 2025566 AMAQI
13th Jul 2025547 AMAQI
13th Jul 2025548 AMAQI
13th Jul 2025429 AMAQI
13th Jul 20253210 AMAQI
13th Jul 20253211 AMAQI
13th Jul 20253812 PMAQI
13th Jul 2025401 PMAQI
13th Jul 2025372 PMAQI
13th Jul 2025383 PMAQI
13th Jul 2025424 PMAQI
13th Jul 2025385 PMAQI
13th Jul 2025456 PMAQI
13th Jul 2025427 PMAQI
13th Jul 2025508 PMAQI
13th Jul 2025539 PMAQI
13th Jul 20255210 PMAQI
13th Jul 20255211 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025531 AMAQI
14th Jul 2025552 AMAQI
14th Jul 2025563 AMAQI
23°C19/29°C
14th Jul 2025554 AMAQI
14th Jul 2025545 AMAQI
14th Jul 2025536 AMAQI
14th Jul 2025537 AMAQI
14th Jul 2025538 AMAQI
14th Jul 2025429 AMAQI
14th Jul 20254210 AMAQI
14th Jul 20253411 AMAQI
14th Jul 20252812 PMAQI
14th Jul 2025381 PMAQI
14th Jul 2025362 PMAQI
14th Jul 2025363 PMAQI
14th Jul 2025354 PMAQI
14th Jul 2025325 PMAQI
14th Jul 2025306 PMAQI
14th Jul 2025237 PMAQI
14th Jul 2025288 PMAQI
14th Jul 2025419 PMAQI
14th Jul 20254210 PMAQI
14th Jul 20254111 PMAQI
15th Jul 20254112 AMAQI
15th Jul 2025441 AMAQI
15th Jul 2025422 AMAQI
15th Jul 2025523 AMAQI
20°C16/22°C
15th Jul 2025534 AMAQI
15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025249 AMAQI
15th Jul 20251310 AMAQI
15th Jul 20251511 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025211 PMAQI
15th Jul 2025222 PMAQI
15th Jul 2025243 PMAQI
15th Jul 2025284 PMAQI
15th Jul 2025295 PMAQI
15th Jul 2025286 PMAQI
15th Jul 2025277 PMAQI
15th Jul 2025328 PMAQI
15th Jul 2025409 PMAQI
15th Jul 20254210 PMAQI
15th Jul 20254111 PMAQI
16th Jul 20254212 AMAQI
16th Jul 2025461 AMAQI
16th Jul 2025522 AMAQI
16th Jul 2025523 AMAQI
18°C13/21°C
16th Jul 2025504 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025466 AMAQI
16th Jul 2025467 AMAQI
16th Jul 2025468 AMAQI
16th Jul 2025349 AMAQI
16th Jul 20253810 AMAQI
16th Jul 20254411 AMAQI
16th Jul 20254812 PMAQI
16th Jul 2025531 PMAQI
16th Jul 2025502 PMAQI
16th Jul 2025443 PMAQI
16th Jul 2025364 PMAQI
16th Jul 2025405 PMAQI
16th Jul 2025396 PMAQI
16th Jul 2025347 PMAQI
16th Jul 2025328 PMAQI
16th Jul 2025399 PMAQI
16th Jul 20253610 PMAQI
16th Jul 20253611 PMAQI
17th Jul 20253412 AMAQI
17th Jul 2025361 AMAQI
17th Jul 2025382 AMAQI
17th Jul 2025403 AMAQI
17°C11/20°C
17th Jul 2025484 AMAQI
17th Jul 2025485 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025488 AMAQI
17th Jul 2025229 AMAQI
17th Jul 20251510 AMAQI
17th Jul 20251611 AMAQI
17th Jul 20252212 PMAQI
17th Jul 2025221 PMAQI
17th Jul 2025222 PMAQI
17th Jul 2025243 PMAQI
17th Jul 2025304 PMAQI
17th Jul 2025285 PMAQI
17th Jul 2025316 PMAQI
17th Jul 2025357 PMAQI
17th Jul 2025338 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20253710 PMAQI
17th Jul 20253911 PMAQI
18th Jul 20253912 AMAQI
18th Jul 2025341 AMAQI
18th Jul 2025452 AMAQI
18th Jul 2025463 AMAQI
16°C12/14°C
18th Jul 2025444 AMAQI
18th Jul 2025415 AMAQI
18th Jul 2025406 AMAQI
18th Jul 2025407 AMAQI
18th Jul 2025408 AMAQI
18th Jul 2025239 AMAQI
18th Jul 20252010 AMAQI
18th Jul 20252411 AMAQI
18th Jul 20252412 PMAQI
18th Jul 2025301 PMAQI
18th Jul 2025262 PMAQI
18th Jul 2025243 PMAQI
18th Jul 2025314 PMAQI
18th Jul 2025345 PMAQI
18th Jul 2025306 PMAQI
18th Jul 2025297 PMAQI
18th Jul 2025328 PMAQI
18th Jul 2025399 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20253611 PMAQI
19th Jul 20253712 AMAQI
19th Jul 2025401 AMAQI
19th Jul 2025442 AMAQI
19th Jul 2025443 AMAQI
17°C9/21°C
19th Jul 2025424 AMAQI
19th Jul 2025405 AMAQI
19th Jul 2025406 AMAQI
19th Jul 2025417 AMAQI
19th Jul 2025398 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20252310 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252112 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025233 PMAQI
19th Jul 2025214 PMAQI
19th Jul 2025245 PMAQI
19th Jul 2025276 PMAQI
19th Jul 2025287 PMAQI
19th Jul 2025328 PMAQI
19th Jul 2025369 PMAQI
19th Jul 20253810 PMAQI
19th Jul 20253611 PMAQI
20th Jul 20253712 AMAQI
20th Jul 2025361 AMAQI
20th Jul 2025412 AMAQI
20th Jul 2025423 AMAQI
18°C11/22°C
20th Jul 2025424 AMAQI
20th Jul 2025395 AMAQI
20th Jul 2025386 AMAQI
20th Jul 2025387 AMAQI
20th Jul 2025388 AMAQI
20th Jul 2025319 AMAQI
20th Jul 20252610 AMAQI
20th Jul 20252811 AMAQI
20th Jul 20252412 PMAQI
20th Jul 2025191 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025246 PMAQI
20th Jul 2025257 PMAQI
20th Jul 2025328 PMAQI
20th Jul 2025369 PMAQI
20th Jul 20253310 PMAQI
20th Jul 20253511 PMAQI
21st Jul 20253512 AMAQI
21st Jul 2025351 AMAQI
21st Jul 2025392 AMAQI
21st Jul 2025403 AMAQI
20°C12/25°C
21st Jul 2025404 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025387 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025269 AMAQI
21st Jul 20253210 AMAQI
21st Jul 20253711 AMAQI
21st Jul 20253512 PMAQI
21st Jul 2025301 PMAQI
21st Jul 2025352 PMAQI
21st Jul 2025253 PMAQI
21st Jul 2025324 PMAQI
21st Jul 2025335 PMAQI
21st Jul 2025426 PMAQI
21st Jul 2025357 PMAQI
21st Jul 2025338 PMAQI
21st Jul 2025369 PMAQI
21st Jul 20253610 PMAQI
21st Jul 20253611 PMAQI
22nd Jul 20253412 AMAQI
22nd Jul 2025381 AMAQI
22nd Jul 2025392 AMAQI
22nd Jul 2025383 AMAQI
20°C14/25°C
22nd Jul 2025384 AMAQI
22nd Jul 2025375 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025377 AMAQI
22nd Jul 2025378 AMAQI
22nd Jul 2025329 AMAQI
22nd Jul 20253310 AMAQI
22nd Jul 20255211 AMAQI
22nd Jul 20254912 PMAQI
22nd Jul 2025461 PMAQI
22nd Jul 2025462 PMAQI
22nd Jul 2025463 PMAQI
22nd Jul 2025404 PMAQI
22nd Jul 2025345 PMAQI
22nd Jul 2025386 PMAQI
22nd Jul 2025387 PMAQI
22nd Jul 2025388 PMAQI
22nd Jul 2025419 PMAQI
22nd Jul 20254110 PMAQI
22nd Jul 20254011 PMAQI
23rd Jul 20254012 AMAQI
23rd Jul 2025381 AMAQI
23rd Jul 2025392 AMAQI
23rd Jul 2025383 AMAQI
20°C14/24°C
23rd Jul 2025394 AMAQI
23rd Jul 2025395 AMAQI
23rd Jul 2025406 AMAQI
23rd Jul 2025407 AMAQI
23rd Jul 2025398 AMAQI
23rd Jul 2025369 AMAQI
23rd Jul 20254310 AMAQI
23rd Jul 20254811 AMAQI
23rd Jul 20255412 PMAQI
23rd Jul 2025541 PMAQI
23rd Jul 2025522 PMAQI
23rd Jul 2025523 PMAQI
23rd Jul 2025524 PMAQI
23rd Jul 2025505 PMAQI
23rd Jul 2025396 PMAQI
23rd Jul 2025347 PMAQI
23rd Jul 2025368 PMAQI
23rd Jul 2025399 PMAQI
23rd Jul 20254110 PMAQI
23rd Jul 20253811 PMAQI
24th Jul 20253912 AMAQI
24th Jul 2025391 AMAQI
24th Jul 2025402 AMAQI
24th Jul 2025403 AMAQI
20°C13/25°C
24th Jul 2025414 AMAQI
24th Jul 2025425 AMAQI
24th Jul 2025426 AMAQI
24th Jul 2025427 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025439 AMAQI
24th Jul 20254810 AMAQI
24th Jul 20255211 AMAQI
24th Jul 20255612 PMAQI
24th Jul 2025531 PMAQI
24th Jul 2025562 PMAQI
24th Jul 2025563 PMAQI
24th Jul 2025544 PMAQI
24th Jul 2025545 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025377 PMAQI
24th Jul 2025378 PMAQI
24th Jul 2025349 PMAQI
24th Jul 20253210 PMAQI
24th Jul 20253311 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025331 AMAQI
25th Jul 2025402 AMAQI
25th Jul 2025413 AMAQI
21°C12/28°C
25th Jul 2025434 AMAQI
25th Jul 2025445 AMAQI
25th Jul 2025446 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025448 AMAQI
25th Jul 2025279 AMAQI
25th Jul 20253010 AMAQI
25th Jul 20253611 AMAQI
25th Jul 20253512 PMAQI
25th Jul 2025361 PMAQI
25th Jul 2025372 PMAQI
25th Jul 2025323 PMAQI
25th Jul 2025354 PMAQI
25th Jul 2025405 PMAQI
25th Jul 2025416 PMAQI
25th Jul 2025337 PMAQI
25th Jul 2025328 PMAQI
25th Jul 2025399 PMAQI
25th Jul 20253610 PMAQI
25th Jul 20253711 PMAQI
26th Jul 20253512 AMAQI
26th Jul 2025351 AMAQI
26th Jul 2025412 AMAQI
26th Jul 2025403 AMAQI
21°C17/27°C
26th Jul 2025404 AMAQI
26th Jul 2025405 AMAQI
26th Jul 2025406 AMAQI
26th Jul 2025397 AMAQI
26th Jul 2025398 AMAQI
26th Jul 2025299 AMAQI
26th Jul 20252810 AMAQI
26th Jul 20252911 AMAQI
26th Jul 20252912 PMAQI
26th Jul 2025271 PMAQI
26th Jul 2025282 PMAQI
26th Jul 2025283 PMAQI
26th Jul 2025284 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025266 PMAQI
26th Jul 2025267 PMAQI
26th Jul 2025268 PMAQI
26th Jul 2025329 PMAQI
26th Jul 20253010 PMAQI
26th Jul 20253011 PMAQI
27th Jul 20253212 AMAQI
27th Jul 2025331 AMAQI
27th Jul 2025362 AMAQI
27th Jul 2025393 AMAQI
19°C13/24°C
27th Jul 2025384 AMAQI
27th Jul 2025375 AMAQI
27th Jul 2025376 AMAQI
27th Jul 2025387 AMAQI
27th Jul 2025378 AMAQI
27th Jul 2025299 AMAQI
27th Jul 20252610 AMAQI
27th Jul 20252611 AMAQI
27th Jul 20252412 PMAQI
27th Jul 2025261 PMAQI
27th Jul 2025362 PMAQI
27th Jul 2025383 PMAQI
27th Jul 2025364 PMAQI
27th Jul 2025325 PMAQI
27th Jul 2025356 PMAQI
27th Jul 2025307 PMAQI
27th Jul 2025368 PMAQI
27th Jul 2025359 PMAQI
27th Jul 20253310 PMAQI
27th Jul 20253111 PMAQI
28th Jul 20253012 AMAQI
28th Jul 2025321 AMAQI
28th Jul 2025372 AMAQI
28th Jul 2025373 AMAQI
19°C12/23°C
28th Jul 2025374 AMAQI
28th Jul 2025365 AMAQI
28th Jul 2025366 AMAQI
28th Jul 2025367 AMAQI
28th Jul 2025348 AMAQI
28th Jul 2025309 AMAQI
28th Jul 20253010 AMAQI
28th Jul 20253211 AMAQI
28th Jul 20253312 PMAQI
28th Jul 2025491 PMAQI
28th Jul 2025482 PMAQI
28th Jul 2025453 PMAQI
28th Jul 2025494 PMAQI
28th Jul 2025485 PMAQI
28th Jul 2025526 PMAQI
28th Jul 2025487 PMAQI
28th Jul 2025438 PMAQI
28th Jul 2025409 PMAQI
28th Jul 20253910 PMAQI
28th Jul 20253811 PMAQI
29th Jul 20253812 AMAQI
29th Jul 2025391 AMAQI
29th Jul 2025362 AMAQI
29th Jul 2025353 AMAQI
20°C13/24°C
29th Jul 2025364 AMAQI
29th Jul 2025375 AMAQI
29th Jul 2025366 AMAQI
29th Jul 2025367 AMAQI
29th Jul 2025368 AMAQI
29th Jul 2025459 AMAQI
29th Jul 20255610 AMAQI
29th Jul 20255611 AMAQI
29th Jul 20255612 PMAQI
29th Jul 2025531 PMAQI
29th Jul 2025522 PMAQI
29th Jul 2025513 PMAQI
29th Jul 2025564 PMAQI
29th Jul 2025555 PMAQI
29th Jul 2025576 PMAQI
29th Jul 2025547 PMAQI
29th Jul 2025568 PMAQI
29th Jul 2025529 PMAQI
29th Jul 20254910 PMAQI
29th Jul 20254811 PMAQI
30th Jul 20254912 AMAQI
30th Jul 2025461 AMAQI
30th Jul 2025432 AMAQI
30th Jul 2025373 AMAQI
21°C13/26°C
30th Jul 2025394 AMAQI
30th Jul 2025415 AMAQI
30th Jul 2025416 AMAQI
30th Jul 2025407 AMAQI
30th Jul 2025418 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20255910 AMAQI
30th Jul 20255411 AMAQI
30th Jul 20255612 PMAQI
30th Jul 2025581 PMAQI
30th Jul 2025562 PMAQI
30th Jul 2025543 PMAQI
30th Jul 2025524 PMAQI
30th Jul 2025545 PMAQI
30th Jul 2025556 PMAQI
30th Jul 2025537 PMAQI
30th Jul 2025528 PMAQI
30th Jul 2025539 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255111 PMAQI
31st Jul 20254912 AMAQI
31st Jul 2025461 AMAQI
31st Jul 2025432 AMAQI
31st Jul 2025423 AMAQI
22°C13/31°C
31st Jul 2025424 AMAQI
31st Jul 2025425 AMAQI
31st Jul 2025426 AMAQI
31st Jul 2025427 AMAQI
31st Jul 2025428 AMAQI
31st Jul 2025429 AMAQI
31st Jul 20254210 AMAQI
31st Jul 20254811 AMAQI
31st Jul 20254412 PMAQI
31st Jul 2025471 PMAQI
31st Jul 2025462 PMAQI
31st Jul 2025443 PMAQI
31st Jul 2025404 PMAQI
31st Jul 2025475 PMAQI
31st Jul 2025456 PMAQI
31st Jul 2025367 PMAQI
31st Jul 2025508 PMAQI
31st Jul 2025429 PMAQI
31st Jul 20253710 PMAQI
31st Jul 20253811 PMAQI
1st Aug 20253712 AMAQI
1st Aug 2025371 AMAQI
1st Aug 2025322 AMAQI
1st Aug 2025343 AMAQI
20°C12/26°C
1st Aug 2025364 AMAQI
1st Aug 2025355 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025357 AMAQI
1st Aug 2025388 AMAQI
1st Aug 2025549 AMAQI
1st Aug 20255010 AMAQI
1st Aug 20255411 AMAQI
1st Aug 20254812 PMAQI
1st Aug 2025551 PMAQI
1st Aug 2025422 PMAQI
1st Aug 2025403 PMAQI
1st Aug 2025544 PMAQI
1st Aug 2025525 PMAQI
1st Aug 2025536 PMAQI
1st Aug 2025507 PMAQI
1st Aug 2025468 PMAQI
1st Aug 2025449 PMAQI
1st Aug 20254410 PMAQI
1st Aug 20254011 PMAQI
2nd Aug 20254012 AMAQI
2nd Aug 2025341 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025383 AMAQI
20°C11/25°C
2nd Aug 2025414 AMAQI
2nd Aug 2025425 AMAQI
2nd Aug 2025426 AMAQI
2nd Aug 2025407 AMAQI
2nd Aug 2025408 AMAQI
2nd Aug 2025509 AMAQI
2nd Aug 20253910 AMAQI
2nd Aug 20254511 AMAQI
2nd Aug 20254012 PMAQI
2nd Aug 2025461 PMAQI
2nd Aug 2025522 PMAQI
2nd Aug 2025553 PMAQI
2nd Aug 2025504 PMAQI
2nd Aug 2025525 PMAQI
2nd Aug 2025496 PMAQI
2nd Aug 2025537 PMAQI
2nd Aug 2025498 PMAQI
2nd Aug 2025459 PMAQI
2nd Aug 20254610 PMAQI
2nd Aug 20254511 PMAQI
3rd Aug 20253612 AMAQI
3rd Aug 2025391 AMAQI
3rd Aug 2025422 AMAQI
3rd Aug 2025403 AMAQI
21°C14/26°C
3rd Aug 2025424 AMAQI
3rd Aug 2025425 AMAQI
3rd Aug 2025406 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025418 AMAQI
3rd Aug 2025449 AMAQI
3rd Aug 20255010 AMAQI
3rd Aug 20255411 AMAQI
3rd Aug 20255912 PMAQI
3rd Aug 2025561 PMAQI
3rd Aug 2025572 PMAQI
3rd Aug 2025503 PMAQI
3rd Aug 2025584 PMAQI
3rd Aug 2025595 PMAQI
3rd Aug 2025586 PMAQI
3rd Aug 2025607 PMAQI
3rd Aug 2025578 PMAQI
3rd Aug 2025509 PMAQI
3rd Aug 20254510 PMAQI
3rd Aug 20254711 PMAQI
4th Aug 20254112 AMAQI
4th Aug 2025391 AMAQI
4th Aug 2025412 AMAQI
4th Aug 2025403 AMAQI
20°C14/24°C
4th Aug 2025464 AMAQI
4th Aug 2025465 AMAQI
4th Aug 2025466 AMAQI
4th Aug 2025467 AMAQI
4th Aug 2025478 AMAQI
4th Aug 2025579 AMAQI
4th Aug 20256010 AMAQI
4th Aug 20256811 AMAQI
4th Aug 20257512 PMAQI
4th Aug 2025711 PMAQI
4th Aug 2025762 PMAQI
4th Aug 2025723 PMAQI
4th Aug 2025914 PMAQI
4th Aug 2025705 PMAQI
4th Aug 2025726 PMAQI
4th Aug 2025687 PMAQI
4th Aug 2025608 PMAQI
4th Aug 2025579 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20255411 PMAQI
5th Aug 20255712 AMAQI
5th Aug 2025481 AMAQI
5th Aug 2025462 AMAQI
5th Aug 2025443 AMAQI
20°C14/24°C
5th Aug 2025524 AMAQI
4 AM5th Aug 2025545 AMAQI
5th Aug 2025546 AMAQI
5th Aug 2025547 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025519 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20255611 AMAQI
11 AM5th Aug 20255812 PMAQI
5th Aug 2025551 PMAQI
7 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
46AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
9 AM - 10 AM
40AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 8 AM (Avg. 46), while the lowest AQI was between 9 AM to 10 AM (Avg. 40).
Night time
Avg. Highest Time
12 AM - 11 PM
45AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
45AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 45), while the lowest AQI was between 12 AM to 11 PM (Avg. 45).
2025 Days Vs Air Quality
Arai, Ina, Nagano, Japan
2025
89%
192
11%
23
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
192 DaysModerate
23 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 217 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
Arai, Ina, Nagano, Japan
AQI levels in 2025
AQI
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.
1st January 2025
29AQI
29AQI
2nd January 2025
29AQI
29AQI
3rd January 2025
29AQI
29AQI
4th January 2025
29AQI
29AQI
5th January 2025
28AQI
28AQI
6th January 2025
40AQI
40AQI
7th January 2025
29AQI
29AQI
8th January 2025
30AQI
30AQI
9th January 2025
30AQI
30AQI
10th January 2025
26AQI
26AQI
11th January 2025
28AQI
28AQI
12th January 2025
33AQI
33AQI
13th January 2025
30AQI
30AQI
14th January 2025
33AQI
33AQI
15th January 2025
32AQI
32AQI
16th January 2025
26AQI
26AQI
17th January 2025
28AQI
28AQI
18th January 2025
30AQI
30AQI
19th January 2025
36AQI
36AQI
20th January 2025
33AQI
33AQI
21st January 2025
35AQI
35AQI
22nd January 2025
38AQI
38AQI
23rd January 2025
50AQI
50AQI
24th January 2025
52AQI
52AQI
25th January 2025
39AQI
39AQI
26th January 2025
36AQI
36AQI
27th January 2025
30AQI
30AQI
28th January 2025
30AQI
30AQI
29th January 2025
33AQI
33AQI
30th January 2025
31AQI
31AQI
31st January 2025
33AQI
33AQI
1st February 2025
44AQI
44AQI
2nd February 2025
40AQI
40AQI
3rd February 2025
41AQI
41AQI
4th February 2025
35AQI
35AQI
5th February 2025
35AQI
35AQI
6th February 2025
32AQI
32AQI
7th February 2025
34AQI
34AQI
8th February 2025
31AQI
31AQI
9th February 2025
30AQI
30AQI
10th February 2025
31AQI
31AQI
11th February 2025
31AQI
31AQI
12th February 2025
30AQI
30AQI
13th February 2025
32AQI
32AQI
14th February 2025
31AQI
31AQI
15th February 2025
31AQI
31AQI
16th February 2025
42AQI
42AQI
17th February 2025
41AQI
41AQI
18th February 2025
35AQI
35AQI
19th February 2025
34AQI
34AQI
20th February 2025
31AQI
31AQI
21st February 2025
31AQI
31AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
32AQI
32AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
36AQI
36AQI
27th February 2025
38AQI
38AQI
28th February 2025
43AQI
43AQI
1st March 2025
41AQI
41AQI
2nd March 2025
44AQI
44AQI
3rd March 2025
38AQI
38AQI
4th March 2025
36AQI
36AQI
5th March 2025
40AQI
40AQI
6th March 2025
34AQI
34AQI
7th March 2025
37AQI
37AQI
8th March 2025
35AQI
35AQI
9th March 2025
37AQI
37AQI
10th March 2025
37AQI
37AQI
11th March 2025
34AQI
34AQI
12th March 2025
31AQI
31AQI
13th March 2025
41AQI
41AQI
14th March 2025
39AQI
39AQI
15th March 2025
39AQI
39AQI
16th March 2025
25AQI
25AQI
17th March 2025
23AQI
23AQI
18th March 2025
24AQI
24AQI
19th March 2025
21AQI
21AQI
20th March 2025
28AQI
28AQI
21st March 2025
44AQI
44AQI
22nd March 2025
48AQI
48AQI
23rd March 2025
57AQI
57AQI
24th March 2025
59AQI
59AQI
25th March 2025
73AQI
73AQI
26th March 2025
95AQI
95AQI
27th March 2025
71AQI
71AQI
28th March 2025
49AQI
49AQI
29th March 2025
38AQI
38AQI
30th March 2025
38AQI
38AQI
31st March 2025
30AQI
30AQI
1st April 2025
26AQI
26AQI
2nd April 2025
23AQI
23AQI
3rd April 2025
22AQI
22AQI
4th April 2025
22AQI
22AQI
5th April 2025
29AQI
29AQI
6th April 2025
24AQI
24AQI
7th April 2025
33AQI
33AQI
8th April 2025
39AQI
39AQI
9th April 2025
29AQI
29AQI
10th April 2025
44AQI
44AQI
11th April 2025
35AQI
35AQI
12th April 2025
46AQI
46AQI
13th April 2025
27AQI
27AQI
14th April 2025
37AQI
37AQI
15th April 2025
21AQI
21AQI
16th April 2025
32AQI
32AQI
17th April 2025
43AQI
43AQI
18th April 2025
53AQI
53AQI
19th April 2025
68AQI
68AQI
20th April 2025
53AQI
53AQI
21st April 2025
42AQI
42AQI
22nd April 2025
46AQI
46AQI
23rd April 2025
28AQI
28AQI
24th April 2025
30AQI
30AQI
25th April 2025
37AQI
37AQI
26th April 2025
43AQI
43AQI
27th April 2025
46AQI
46AQI
28th April 2025
44AQI
44AQI
29th April 2025
37AQI
37AQI
30th April 2025
51AQI
51AQI
1st May 2025
45AQI
45AQI
2nd May 2025
34AQI
34AQI
3rd May 2025
34AQI
34AQI
4th May 2025
35AQI
35AQI
5th May 2025
39AQI
39AQI
6th May 2025
31AQI
31AQI
7th May 2025
29AQI
29AQI
8th May 2025
34AQI
34AQI
9th May 2025
29AQI
29AQI
10th May 2025
24AQI
24AQI
11th May 2025
26AQI
26AQI
12th May 2025
26AQI
26AQI
13th May 2025
38AQI
38AQI
14th May 2025
44AQI
44AQI
15th May 2025
47AQI
47AQI
16th May 2025
48AQI
48AQI
17th May 2025
35AQI
35AQI
18th May 2025
46AQI
46AQI
19th May 2025
44AQI
44AQI
20th May 2025
62AQI
62AQI
21st May 2025
64AQI
64AQI
22nd May 2025
50AQI
50AQI
23rd May 2025
54AQI
54AQI
24th May 2025
48AQI
48AQI
25th May 2025
30AQI
30AQI
26th May 2025
31AQI
31AQI
27th May 2025
30AQI
30AQI
28th May 2025
27AQI
27AQI
29th May 2025
36AQI
36AQI
30th May 2025
23AQI
23AQI
31st May 2025
22AQI
22AQI
1st June 2025
21AQI
21AQI
2nd June 2025
30AQI
30AQI
3rd June 2025
24AQI
24AQI
4th June 2025
30AQI
30AQI
5th June 2025
35AQI
35AQI
6th June 2025
43AQI
43AQI
7th June 2025
46AQI
46AQI
8th June 2025
55AQI
55AQI
9th June 2025
54AQI
54AQI
10th June 2025
32AQI
32AQI
11th June 2025
29AQI
29AQI
12th June 2025
38AQI
38AQI
13th June 2025
47AQI
47AQI
14th June 2025
39AQI
39AQI
15th June 2025
29AQI
29AQI
16th June 2025
30AQI
30AQI
17th June 2025
38AQI
38AQI
18th June 2025
47AQI
47AQI
19th June 2025
50AQI
50AQI
20th June 2025
55AQI
55AQI
21st June 2025
49AQI
49AQI
22nd June 2025
43AQI
43AQI
23rd June 2025
33AQI
33AQI
24th June 2025
33AQI
33AQI
25th June 2025
33AQI
33AQI
26th June 2025
29AQI
29AQI
27th June 2025
35AQI
35AQI
28th June 2025
37AQI
37AQI
29th June 2025
44AQI
44AQI
30th June 2025
47AQI
47AQI
1st July 2025
50AQI
50AQI
2nd July 2025
48AQI
48AQI
3rd July 2025
49AQI
49AQI
4th July 2025
51AQI
51AQI
5th July 2025
60AQI
60AQI
6th July 2025
55AQI
55AQI
7th July 2025
60AQI
60AQI
8th July 2025
62AQI
62AQI
9th July 2025
66AQI
66AQI
10th July 2025
61AQI
61AQI
11th July 2025
46AQI
46AQI
12th July 2025
47AQI
47AQI
13th July 2025
48AQI
48AQI
14th July 2025
42AQI
42AQI
15th July 2025
36AQI
36AQI
16th July 2025
43AQI
43AQI
17th July 2025
34AQI
34AQI
18th July 2025
34AQI
34AQI
19th July 2025
33AQI
33AQI
20th July 2025
32AQI
32AQI
21st July 2025
36AQI
36AQI
22nd July 2025
39AQI
39AQI
23rd July 2025
42AQI
42AQI
24th July 2025
43AQI
43AQI
25th July 2025
37AQI
37AQI
26th July 2025
32AQI
32AQI
27th July 2025
33AQI
33AQI
28th July 2025
39AQI
39AQI
29th July 2025
47AQI
47AQI
30th July 2025
49AQI
49AQI
31st July 2025
43AQI
43AQI
1st August 2025
43AQI
43AQI
2nd August 2025
44AQI
44AQI
3rd August 2025
47AQI
47AQI
33AQI
35AQI
41AQI
37AQI
38AQI
39AQI
45AQI
45AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202538AQI
30
1
28
26
5
26
4
28
3
27
3
24
7
3
192
23
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
January33AQI
202431AQI
31
29
28
3
23
7
31
26
4
31
29
2
28
2
31
30
31
348
18
Highest AQI recorded in
April43AQI
Lowest AQI recorded in
October24AQI
202334AQI
28
3
28
25
6
23
7
29
2
30
27
4
31
30
31
28
1
30
1
340
24
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
August25AQI
202235AQI
31
20
1
23
8
14
3
24
7
26
4
18
3
1
27
1
31
28
2
31
274
29
Highest AQI recorded in
May43AQI
Lowest AQI recorded in
August19AQI
202131AQI
28
3
25
3
28
1
20
1
30
1
25
5
29
2
31
30
31
26
4
31
334
20
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
August25AQI
202028AQI
12
1
18
3
18
25
5
31
22
8
1
19
30
1
30
31
236
18
1
Highest AQI recorded in
August44AQI
Lowest AQI recorded in
July17AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
38AQILeast Polluted Year Recorded
2020(Avg.)
28AQIArai's annual 2025 AQI (38) shows an average percentage change of 20.6% (worsened AQI) compared to previous years: 2020 (28), 2021 (31), 2022 (35), 2023 (34), 2024 (31).
