Suwa, Niiza, Saitama, 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
Suwa, Niiza, Saitama, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
28th Aug 2021
74AQILowest AQI recorded on
8th Aug 2021
15AQISame Day Analysis (12th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 36 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Suwa, Niiza, Saitama, Japan
AQI
Day
Night
.
4 AM12th Aug 2025
6 PM
3 AM13th Aug 2025
Day time
Avg. Highest Time
4AM12th Aug
43AQI
Avg. Lowest Time
3PM12th Aug
24AQI
Night time
Avg. Highest Time
2AM13th Aug
41AQI
Avg. Lowest Time
7PM12th Aug
30AQI
In the last 24 hours,
Suwa's AQI reached its highest point of 43 at 4 AM during the Day, while the lowest point, 24, was recorded at 3 PM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Suwa, Niiza, Saitama, Japan
JulAug
14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th
Day
Night
14th Jul 2025594 AMAQI
14th Jul 2025585 AMAQI
14th Jul 2025586 AMAQI
14th Jul 2025587 AMAQI
14th Jul 2025588 AMAQI
14th Jul 2025379 AMAQI
14th Jul 20252710 AMAQI
14th Jul 20252011 AMAQI
14th Jul 20252212 PMAQI
14th Jul 2025281 PMAQI
14th Jul 2025272 PMAQI
14th Jul 2025243 PMAQI
14th Jul 2025224 PMAQI
14th Jul 2025275 PMAQI
14th Jul 2025326 PMAQI
14th Jul 2025277 PMAQI
14th Jul 2025338 PMAQI
14th Jul 2025509 PMAQI
14th Jul 20254910 PMAQI
14th Jul 20254911 PMAQI
15th Jul 20255012 AMAQI
15th Jul 2025531 AMAQI
15th Jul 2025562 AMAQI
15th Jul 2025573 AMAQI
27°C25/30°C
15th Jul 2025564 AMAQI
15th Jul 2025545 AMAQI
15th Jul 2025546 AMAQI
15th Jul 2025547 AMAQI
15th Jul 2025548 AMAQI
15th Jul 2025389 AMAQI
15th Jul 20253610 AMAQI
15th Jul 20252811 AMAQI
15th Jul 20252512 PMAQI
15th Jul 2025341 PMAQI
15th Jul 2025382 PMAQI
15th Jul 2025393 PMAQI
15th Jul 2025344 PMAQI
15th Jul 2025255 PMAQI
15th Jul 2025286 PMAQI
15th Jul 2025347 PMAQI
15th Jul 2025348 PMAQI
15th Jul 2025469 PMAQI
15th Jul 20254410 PMAQI
15th Jul 20254711 PMAQI
16th Jul 20254812 AMAQI
16th Jul 2025521 AMAQI
16th Jul 2025542 AMAQI
16th Jul 2025543 AMAQI
28°C27/31°C
16th Jul 2025544 AMAQI
16th Jul 2025525 AMAQI
16th Jul 2025526 AMAQI
16th Jul 2025527 AMAQI
16th Jul 2025528 AMAQI
16th Jul 2025549 AMAQI
16th Jul 20254810 AMAQI
16th Jul 20254411 AMAQI
16th Jul 20253112 PMAQI
16th Jul 2025261 PMAQI
16th Jul 2025272 PMAQI
16th Jul 2025263 PMAQI
16th Jul 2025254 PMAQI
16th Jul 2025285 PMAQI
16th Jul 2025246 PMAQI
16th Jul 2025257 PMAQI
16th Jul 2025328 PMAQI
16th Jul 2025439 PMAQI
16th Jul 20254210 PMAQI
16th Jul 20254111 PMAQI
17th Jul 20254112 AMAQI
17th Jul 2025481 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
29°C26/31°C
17th Jul 2025524 AMAQI
17th Jul 2025525 AMAQI
17th Jul 2025516 AMAQI
17th Jul 2025517 AMAQI
17th Jul 2025518 AMAQI
17th Jul 2025369 AMAQI
17th Jul 20253510 AMAQI
17th Jul 20254111 AMAQI
17th Jul 20253812 PMAQI
17th Jul 2025361 PMAQI
17th Jul 2025332 PMAQI
17th Jul 2025383 PMAQI
17th Jul 2025374 PMAQI
17th Jul 2025365 PMAQI
17th Jul 2025376 PMAQI
17th Jul 2025437 PMAQI
17th Jul 2025438 PMAQI
17th Jul 2025469 PMAQI
17th Jul 20254510 PMAQI
17th Jul 20254611 PMAQI
18th Jul 20254612 AMAQI
18th Jul 2025481 AMAQI
18th Jul 2025502 AMAQI
18th Jul 2025503 AMAQI
29°C27/33°C
18th Jul 2025504 AMAQI
18th Jul 2025475 AMAQI
18th Jul 2025476 AMAQI
18th Jul 2025477 AMAQI
18th Jul 2025468 AMAQI
18th Jul 2025369 AMAQI
18th Jul 20253210 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025271 PMAQI
18th Jul 2025262 PMAQI
18th Jul 2025283 PMAQI
18th Jul 2025274 PMAQI
18th Jul 2025245 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025247 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025389 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20254011 PMAQI
19th Jul 20253912 AMAQI
19th Jul 2025441 AMAQI
19th Jul 2025482 AMAQI
19th Jul 2025483 AMAQI
29°C26/33°C
19th Jul 2025464 AMAQI
19th Jul 2025435 AMAQI
19th Jul 2025446 AMAQI
19th Jul 2025447 AMAQI
19th Jul 2025448 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252410 AMAQI
19th Jul 20252111 AMAQI
19th Jul 20251812 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025262 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025255 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025257 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025369 PMAQI
19th Jul 20253610 PMAQI
19th Jul 20253611 PMAQI
20th Jul 20253612 AMAQI
20th Jul 2025391 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025453 AMAQI
29°C26/33°C
20th Jul 2025444 AMAQI
20th Jul 2025415 AMAQI
20th Jul 2025416 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025349 AMAQI
20th Jul 20253010 AMAQI
20th Jul 20252711 AMAQI
20th Jul 20252712 PMAQI
20th Jul 2025301 PMAQI
20th Jul 2025292 PMAQI
20th Jul 2025323 PMAQI
20th Jul 2025304 PMAQI
20th Jul 2025285 PMAQI
20th Jul 2025276 PMAQI
20th Jul 2025327 PMAQI
20th Jul 2025328 PMAQI
20th Jul 2025369 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253711 PMAQI
21st Jul 20253612 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025403 AMAQI
30°C27/35°C
21st Jul 2025404 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025387 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025289 AMAQI
21st Jul 20253410 AMAQI
21st Jul 20254611 AMAQI
21st Jul 20254612 PMAQI
21st Jul 2025501 PMAQI
21st Jul 2025472 PMAQI
21st Jul 2025453 PMAQI
21st Jul 2025364 PMAQI
21st Jul 2025385 PMAQI
21st Jul 2025366 PMAQI
21st Jul 2025347 PMAQI
21st Jul 2025328 PMAQI
21st Jul 2025349 PMAQI
21st Jul 20253410 PMAQI
21st Jul 20253311 PMAQI
22nd Jul 20253212 AMAQI
22nd Jul 2025351 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025383 AMAQI
31°C28/36°C
22nd Jul 2025384 AMAQI
22nd Jul 2025405 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025397 AMAQI
22nd Jul 2025398 AMAQI
22nd Jul 2025389 AMAQI
22nd Jul 20254110 AMAQI
22nd Jul 20254511 AMAQI
22nd Jul 20255312 PMAQI
22nd Jul 2025541 PMAQI
22nd Jul 2025542 PMAQI
22nd Jul 2025553 PMAQI
22nd Jul 2025434 PMAQI
22nd Jul 2025425 PMAQI
22nd Jul 2025386 PMAQI
22nd Jul 2025337 PMAQI
22nd Jul 2025328 PMAQI
22nd Jul 2025329 PMAQI
22nd Jul 20253210 PMAQI
22nd Jul 20253211 PMAQI
23rd Jul 20253112 AMAQI
23rd Jul 2025341 AMAQI
23rd Jul 2025382 AMAQI
23rd Jul 2025383 AMAQI
32°C29/36°C
23rd Jul 2025384 AMAQI
23rd Jul 2025405 AMAQI
23rd Jul 2025406 AMAQI
23rd Jul 2025417 AMAQI
23rd Jul 2025408 AMAQI
23rd Jul 2025349 AMAQI
23rd Jul 20255310 AMAQI
23rd Jul 20255611 AMAQI
23rd Jul 20256012 PMAQI
23rd Jul 2025621 PMAQI
23rd Jul 2025592 PMAQI
23rd Jul 2025583 PMAQI
23rd Jul 2025534 PMAQI
23rd Jul 2025515 PMAQI
23rd Jul 2025476 PMAQI
23rd Jul 2025427 PMAQI
23rd Jul 2025348 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253210 PMAQI
23rd Jul 20253311 PMAQI
24th Jul 20253412 AMAQI
24th Jul 2025351 AMAQI
24th Jul 2025382 AMAQI
24th Jul 2025383 AMAQI
32°C29/36°C
24th Jul 2025394 AMAQI
24th Jul 2025425 AMAQI
24th Jul 2025436 AMAQI
24th Jul 2025427 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025469 AMAQI
24th Jul 20255510 AMAQI
24th Jul 20256211 AMAQI
24th Jul 20256412 PMAQI
24th Jul 2025631 PMAQI
24th Jul 2025622 PMAQI
24th Jul 2025603 PMAQI
24th Jul 2025544 PMAQI
24th Jul 2025495 PMAQI
24th Jul 2025446 PMAQI
24th Jul 2025327 PMAQI
24th Jul 2025318 PMAQI
24th Jul 2025369 PMAQI
24th Jul 20253710 PMAQI
24th Jul 20253811 PMAQI
25th Jul 20253612 AMAQI
25th Jul 2025381 AMAQI
25th Jul 2025392 AMAQI
25th Jul 2025393 AMAQI
32°C29/37°C
25th Jul 2025414 AMAQI
25th Jul 2025455 AMAQI
25th Jul 2025466 AMAQI
25th Jul 2025467 AMAQI
25th Jul 2025468 AMAQI
25th Jul 2025509 AMAQI
25th Jul 20255610 AMAQI
25th Jul 20255911 AMAQI
25th Jul 20256212 PMAQI
25th Jul 2025601 PMAQI
25th Jul 2025552 PMAQI
25th Jul 2025493 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025335 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025297 PMAQI
25th Jul 2025288 PMAQI
25th Jul 2025339 PMAQI
25th Jul 20253310 PMAQI
25th Jul 20253311 PMAQI
26th Jul 20253212 AMAQI
26th Jul 2025351 AMAQI
26th Jul 2025412 AMAQI
26th Jul 2025413 AMAQI
32°C29/37°C
26th Jul 2025424 AMAQI
26th Jul 2025465 AMAQI
26th Jul 2025456 AMAQI
26th Jul 2025467 AMAQI
26th Jul 2025468 AMAQI
26th Jul 2025469 AMAQI
26th Jul 20255610 AMAQI
26th Jul 20255811 AMAQI
26th Jul 20256212 PMAQI
26th Jul 2025581 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025483 PMAQI
26th Jul 2025374 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025306 PMAQI
26th Jul 2025257 PMAQI
26th Jul 2025258 PMAQI
26th Jul 2025349 PMAQI
26th Jul 20253410 PMAQI
26th Jul 20253411 PMAQI
27th Jul 20253212 AMAQI
27th Jul 2025351 AMAQI
27th Jul 2025392 AMAQI
27th Jul 2025403 AMAQI
32°C29/37°C
27th Jul 2025414 AMAQI
27th Jul 2025455 AMAQI
27th Jul 2025446 AMAQI
27th Jul 2025447 AMAQI
27th Jul 2025448 AMAQI
27th Jul 2025419 AMAQI
27th Jul 20254510 AMAQI
27th Jul 20255811 AMAQI
27th Jul 20255512 PMAQI
27th Jul 2025551 PMAQI
27th Jul 2025452 PMAQI
27th Jul 2025423 PMAQI
27th Jul 2025344 PMAQI
27th Jul 2025295 PMAQI
27th Jul 2025266 PMAQI
27th Jul 2025247 PMAQI
27th Jul 2025278 PMAQI
27th Jul 2025329 PMAQI
27th Jul 20253010 PMAQI
27th Jul 20253211 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025361 AMAQI
28th Jul 2025392 AMAQI
28th Jul 2025403 AMAQI
32°C29/36°C
28th Jul 2025404 AMAQI
28th Jul 2025425 AMAQI
28th Jul 2025426 AMAQI
28th Jul 2025427 AMAQI
28th Jul 2025428 AMAQI
28th Jul 2025309 AMAQI
28th Jul 20253910 AMAQI
28th Jul 20254211 AMAQI
28th Jul 20255312 PMAQI
28th Jul 2025561 PMAQI
28th Jul 2025562 PMAQI
28th Jul 2025583 PMAQI
28th Jul 2025614 PMAQI
28th Jul 2025605 PMAQI
28th Jul 2025546 PMAQI
28th Jul 2025437 PMAQI
28th Jul 2025368 PMAQI
28th Jul 2025369 PMAQI
28th Jul 20253610 PMAQI
28th Jul 20253411 PMAQI
29th Jul 20253312 AMAQI
29th Jul 2025351 AMAQI
29th Jul 2025392 AMAQI
29th Jul 2025383 AMAQI
32°C29/37°C
29th Jul 2025404 AMAQI
29th Jul 2025415 AMAQI
29th Jul 2025426 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025418 AMAQI
29th Jul 2025319 AMAQI
29th Jul 20253910 AMAQI
29th Jul 20254611 AMAQI
29th Jul 20255212 PMAQI
29th Jul 2025531 PMAQI
29th Jul 2025502 PMAQI
29th Jul 2025523 PMAQI
29th Jul 2025544 PMAQI
29th Jul 2025485 PMAQI
29th Jul 2025366 PMAQI
29th Jul 2025287 PMAQI
29th Jul 2025288 PMAQI
29th Jul 2025329 PMAQI
29th Jul 20253210 PMAQI
29th Jul 20253011 PMAQI
30th Jul 20253012 AMAQI
30th Jul 2025341 AMAQI
30th Jul 2025382 AMAQI
30th Jul 2025383 AMAQI
32°C28/38°C
30th Jul 2025384 AMAQI
30th Jul 2025415 AMAQI
30th Jul 2025406 AMAQI
30th Jul 2025417 AMAQI
30th Jul 2025418 AMAQI
30th Jul 2025229 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20253012 PMAQI
30th Jul 2025351 PMAQI
30th Jul 2025342 PMAQI
30th Jul 2025363 PMAQI
30th Jul 2025324 PMAQI
30th Jul 2025325 PMAQI
30th Jul 2025326 PMAQI
30th Jul 2025327 PMAQI
30th Jul 2025358 PMAQI
30th Jul 2025369 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253611 PMAQI
31st Jul 20253512 AMAQI
31st Jul 2025361 AMAQI
31st Jul 2025372 AMAQI
31st Jul 2025373 AMAQI
31°C28/36°C
31st Jul 2025364 AMAQI
31st Jul 2025365 AMAQI
31st Jul 2025366 AMAQI
31st Jul 2025367 AMAQI
31st Jul 2025368 AMAQI
31st Jul 2025369 AMAQI
31st Jul 20253610 AMAQI
31st Jul 20254811 AMAQI
31st Jul 20254212 PMAQI
31st Jul 2025391 PMAQI
31st Jul 2025402 PMAQI
31st Jul 2025383 PMAQI
31st Jul 2025344 PMAQI
31st Jul 2025295 PMAQI
31st Jul 2025276 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025288 PMAQI
31st Jul 2025289 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252611 PMAQI
1st Aug 20252712 AMAQI
1st Aug 2025311 AMAQI
1st Aug 2025342 AMAQI
1st Aug 2025353 AMAQI
29°C26/35°C
1st Aug 2025364 AMAQI
1st Aug 2025345 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025347 AMAQI
1st Aug 2025368 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20252910 AMAQI
1st Aug 20254111 AMAQI
1st Aug 20254212 PMAQI
1st Aug 2025381 PMAQI
1st Aug 2025362 PMAQI
1st Aug 2025323 PMAQI
1st Aug 2025394 PMAQI
1st Aug 2025325 PMAQI
1st Aug 2025386 PMAQI
1st Aug 2025237 PMAQI
1st Aug 2025298 PMAQI
1st Aug 2025289 PMAQI
1st Aug 20252910 PMAQI
1st Aug 20252811 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025301 AMAQI
2nd Aug 2025372 AMAQI
2nd Aug 2025373 AMAQI
29°C27/32°C
2nd Aug 2025384 AMAQI
2nd Aug 2025385 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025367 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025359 AMAQI
2nd Aug 20253210 AMAQI
2nd Aug 20254411 AMAQI
2nd Aug 20253412 PMAQI
2nd Aug 2025421 PMAQI
2nd Aug 2025552 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025524 PMAQI
2nd Aug 2025525 PMAQI
2nd Aug 2025526 PMAQI
2nd Aug 2025527 PMAQI
2nd Aug 2025408 PMAQI
2nd Aug 2025399 PMAQI
2nd Aug 20253610 PMAQI
2nd Aug 20254311 PMAQI
3rd Aug 20253212 AMAQI
3rd Aug 2025361 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI
31°C27/37°C
3rd Aug 2025404 AMAQI
3rd Aug 2025405 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025398 AMAQI
3rd Aug 2025479 AMAQI
3rd Aug 20255510 AMAQI
3rd Aug 20255211 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025551 PMAQI
3rd Aug 2025572 PMAQI
3rd Aug 2025533 PMAQI
3rd Aug 2025514 PMAQI
3rd Aug 2025545 PMAQI
3rd Aug 2025556 PMAQI
3rd Aug 2025517 PMAQI
3rd Aug 2025518 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20253911 PMAQI
4th Aug 20253812 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025403 AMAQI
32°C28/37°C
4th Aug 2025424 AMAQI
4th Aug 2025435 AMAQI
4th Aug 2025446 AMAQI
4th Aug 2025437 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025629 AMAQI
4th Aug 20256310 AMAQI
4th Aug 20258011 AMAQI
4th Aug 20258012 PMAQI
4th Aug 2025901 PMAQI
4th Aug 2025932 PMAQI
4th Aug 2025873 PMAQI
4th Aug 2025924 PMAQI
4th Aug 2025965 PMAQI
4th Aug 2025836 PMAQI
4th Aug 2025747 PMAQI
4th Aug 2025678 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255410 PMAQI
4th Aug 20254611 PMAQI
5th Aug 20256312 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025422 AMAQI
5th Aug 2025413 AMAQI
33°C30/38°C
5th Aug 2025504 AMAQI
5th Aug 2025545 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025527 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025589 AMAQI
5th Aug 20256510 AMAQI
5th Aug 20256111 AMAQI
5th Aug 20256012 PMAQI
5th Aug 2025581 PMAQI
5th Aug 2025572 PMAQI
5th Aug 2025583 PMAQI
5th Aug 2025604 PMAQI
5th Aug 2025525 PMAQI
5th Aug 2025486 PMAQI
5th Aug 2025467 PMAQI
5th Aug 2025488 PMAQI
5th Aug 2025489 PMAQI
5th Aug 20254810 PMAQI
5th Aug 20254411 PMAQI
6th Aug 20254612 AMAQI
6th Aug 2025491 AMAQI
6th Aug 2025502 AMAQI
6th Aug 2025503 AMAQI
35°C30/39°C
6th Aug 2025524 AMAQI
6th Aug 2025535 AMAQI
6th Aug 2025526 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025528 AMAQI
6th Aug 2025449 AMAQI
6th Aug 20253910 AMAQI
6th Aug 20254111 AMAQI
6th Aug 20255312 PMAQI
6th Aug 2025501 PMAQI
6th Aug 2025532 PMAQI
6th Aug 2025493 PMAQI
6th Aug 2025484 PMAQI
6th Aug 2025585 PMAQI
6th Aug 2025546 PMAQI
6th Aug 2025587 PMAQI
6th Aug 2025548 PMAQI
6th Aug 2025469 PMAQI
6th Aug 20254810 PMAQI
6th Aug 20254611 PMAQI
7th Aug 20254612 AMAQI
7th Aug 2025481 AMAQI
7th Aug 2025522 AMAQI
7th Aug 2025523 AMAQI
33°C30/38°C
7th Aug 2025524 AMAQI
7th Aug 2025515 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025467 AMAQI
7th Aug 2025518 AMAQI
7th Aug 2025469 AMAQI
7th Aug 20254110 AMAQI
7th Aug 20254611 AMAQI
7th Aug 20253012 PMAQI
7th Aug 2025301 PMAQI
7th Aug 2025292 PMAQI
7th Aug 2025293 PMAQI
7th Aug 2025464 PMAQI
7th Aug 2025525 PMAQI
7th Aug 2025536 PMAQI
7th Aug 2025537 PMAQI
7th Aug 2025528 PMAQI
7th Aug 2025499 PMAQI
7th Aug 20255010 PMAQI
7th Aug 20254911 PMAQI
8th Aug 20254912 AMAQI
8th Aug 2025501 AMAQI
8th Aug 2025502 AMAQI
8th Aug 2025503 AMAQI
32°C29/34°C
8th Aug 2025484 AMAQI
8th Aug 2025485 AMAQI
8th Aug 2025476 AMAQI
8th Aug 2025477 AMAQI
8th Aug 2025488 AMAQI
8th Aug 2025389 AMAQI
8th Aug 20253210 AMAQI
8th Aug 20253411 AMAQI
8th Aug 20252912 PMAQI
8th Aug 2025441 PMAQI
8th Aug 2025422 PMAQI
8th Aug 2025443 PMAQI
8th Aug 2025344 PMAQI
8th Aug 2025325 PMAQI
8th Aug 2025506 PMAQI
8th Aug 2025547 PMAQI
8th Aug 2025558 PMAQI
8th Aug 2025509 PMAQI
8th Aug 20254510 PMAQI
8th Aug 20254411 PMAQI
9th Aug 20254112 AMAQI
9th Aug 2025451 AMAQI
9th Aug 2025502 AMAQI
9th Aug 2025503 AMAQI
30°C25/36°C
9th Aug 2025494 AMAQI
9th Aug 2025475 AMAQI
9th Aug 2025476 AMAQI
9th Aug 2025477 AMAQI
9th Aug 2025478 AMAQI
9th Aug 2025339 AMAQI
9th Aug 20252710 AMAQI
9th Aug 20254011 AMAQI
9th Aug 20254012 PMAQI
9th Aug 2025441 PMAQI
9th Aug 2025492 PMAQI
9th Aug 2025563 PMAQI
9th Aug 2025634 PMAQI
9th Aug 2025635 PMAQI
9th Aug 2025606 PMAQI
9th Aug 2025577 PMAQI
9th Aug 2025558 PMAQI
9th Aug 2025539 PMAQI
9th Aug 20255310 PMAQI
9th Aug 20255311 PMAQI
10th Aug 20255212 AMAQI
10th Aug 2025501 AMAQI
10th Aug 2025482 AMAQI
10th Aug 2025483 AMAQI
29°C25/34°C
10th Aug 2025474 AMAQI
10th Aug 2025465 AMAQI
10th Aug 2025466 AMAQI
10th Aug 2025467 AMAQI
10th Aug 2025468 AMAQI
10th Aug 2025459 AMAQI
10th Aug 20253210 AMAQI
10th Aug 20252411 AMAQI
10th Aug 20252512 PMAQI
10th Aug 2025261 PMAQI
10th Aug 2025262 PMAQI
10th Aug 2025233 PMAQI
10th Aug 2025194 PMAQI
10th Aug 2025225 PMAQI
10th Aug 2025196 PMAQI
10th Aug 2025207 PMAQI
10th Aug 2025258 PMAQI
10th Aug 2025399 PMAQI
10th Aug 20254610 PMAQI
10th Aug 20254611 PMAQI
11th Aug 20254412 AMAQI
11th Aug 2025461 AMAQI
11th Aug 2025482 AMAQI
11th Aug 2025483 AMAQI
27°C26/27°C
11th Aug 2025474 AMAQI
11th Aug 2025445 AMAQI
11th Aug 2025446 AMAQI
11th Aug 2025457 AMAQI
11th Aug 2025448 AMAQI
11th Aug 2025359 AMAQI
11th Aug 20253210 AMAQI
11th Aug 20253111 AMAQI
11th Aug 20252812 PMAQI
11th Aug 2025271 PMAQI
11th Aug 2025322 PMAQI
11th Aug 2025353 PMAQI
11th Aug 2025344 PMAQI
11th Aug 2025465 PMAQI
11th Aug 2025396 PMAQI
11th Aug 2025327 PMAQI
11th Aug 2025338 PMAQI
11th Aug 2025349 PMAQI
11th Aug 20253410 PMAQI
11th Aug 20253411 PMAQI
12th Aug 20253912 AMAQI
12th Aug 2025441 AMAQI
12th Aug 2025462 AMAQI
12th Aug 2025443 AMAQI
28°C27/30°C
12th Aug 2025434 AMAQI
12th Aug 2025415 AMAQI
12th Aug 2025406 AMAQI
12th Aug 2025407 AMAQI
12th Aug 2025428 AMAQI
12th Aug 2025279 AMAQI
12th Aug 20253210 AMAQI
12th Aug 20254011 AMAQI
12th Aug 20253412 PMAQI
12th Aug 2025311 PMAQI
12th Aug 2025272 PMAQI
12th Aug 2025243 PMAQI
12th Aug 2025274 PMAQI
12th Aug 2025275 PMAQI
12th Aug 2025356 PMAQI
12th Aug 2025307 PMAQI
12th Aug 2025348 PMAQI
12th Aug 2025349 PMAQI
12th Aug 20253210 PMAQI
12th Aug 20253411 PMAQI
13th Aug 20253812 AMAQI
13th Aug 2025401 AMAQI
13th Aug 2025412 AMAQI
13th Aug 2025413 AMAQI
28°C27/30°C
13th Aug 2025384 AMAQI
4 AM13th Aug 2025375 AMAQI
13th Aug 2025386 AMAQI
13th Aug 2025387 AMAQI
13th Aug 2025378 AMAQI
13th Aug 2025269 AMAQI
13th Aug 20252610 AMAQI
13th Aug 20252911 AMAQI
11 AM13th Aug 20252112 PMAQI
13th Aug 2025291 PMAQI
13th Aug 2025242 PMAQI
13th Aug 2025303 PMAQI
13th Aug 2025264 PMAQI
13th Aug 2025305 PMAQI
13th Aug 2025276 PMAQI
6 PM13th Aug 2025287 PMAQI
13th Aug 2025248 PMAQI
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
44AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
9 AM - 10 AM
39AQI
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. 44), while the lowest AQI was between 9 AM to 10 AM (Avg. 39).
Night time
Avg. Highest Time
2 AM - 3 AM
44AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
7 PM - 8 PM
37AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 3 AM (Avg. 44), while the lowest AQI was between 7 PM to 8 PM (Avg. 37).
2025 Days Vs Air Quality
Suwa, Niiza, Saitama, Japan
2025
91%
203
9%
21
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Good
203 DaysModerate
21 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 225 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
Suwa, Niiza, Saitama, 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
30AQI
30AQI
2nd January 2025
32AQI
32AQI
3rd January 2025
24AQI
24AQI
4th January 2025
28AQI
28AQI
5th January 2025
34AQI
34AQI
6th January 2025
49AQI
49AQI
7th January 2025
30AQI
30AQI
8th January 2025
35AQI
35AQI
9th January 2025
29AQI
29AQI
10th January 2025
28AQI
28AQI
11th January 2025
28AQI
28AQI
12th January 2025
38AQI
38AQI
13th January 2025
31AQI
31AQI
14th January 2025
39AQI
39AQI
15th January 2025
37AQI
37AQI
16th January 2025
30AQI
30AQI
17th January 2025
31AQI
31AQI
18th January 2025
33AQI
33AQI
19th January 2025
47AQI
47AQI
20th January 2025
43AQI
43AQI
21st January 2025
42AQI
42AQI
22nd January 2025
39AQI
39AQI
23rd January 2025
49AQI
49AQI
24th January 2025
44AQI
44AQI
25th January 2025
37AQI
37AQI
26th January 2025
35AQI
35AQI
27th January 2025
31AQI
31AQI
28th January 2025
41AQI
41AQI
29th January 2025
29AQI
29AQI
30th January 2025
33AQI
33AQI
31st January 2025
29AQI
29AQI
1st February 2025
43AQI
43AQI
2nd February 2025
36AQI
36AQI
3rd February 2025
42AQI
42AQI
4th February 2025
32AQI
32AQI
5th February 2025
33AQI
33AQI
6th February 2025
27AQI
27AQI
7th February 2025
29AQI
29AQI
8th February 2025
29AQI
29AQI
9th February 2025
28AQI
28AQI
10th February 2025
28AQI
28AQI
11th February 2025
34AQI
34AQI
12th February 2025
39AQI
39AQI
13th February 2025
45AQI
45AQI
14th February 2025
32AQI
32AQI
15th February 2025
48AQI
48AQI
16th February 2025
41AQI
41AQI
17th February 2025
45AQI
45AQI
18th February 2025
33AQI
33AQI
19th February 2025
35AQI
35AQI
20th February 2025
29AQI
29AQI
21st February 2025
31AQI
31AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
31AQI
31AQI
24th February 2025
32AQI
32AQI
25th February 2025
35AQI
35AQI
26th February 2025
39AQI
39AQI
27th February 2025
40AQI
40AQI
28th February 2025
55AQI
55AQI
1st March 2025
54AQI
54AQI
2nd March 2025
60AQI
60AQI
3rd March 2025
39AQI
39AQI
4th March 2025
38AQI
38AQI
5th March 2025
28AQI
28AQI
6th March 2025
34AQI
34AQI
7th March 2025
31AQI
31AQI
8th March 2025
37AQI
37AQI
9th March 2025
36AQI
36AQI
10th March 2025
37AQI
37AQI
11th March 2025
39AQI
39AQI
12th March 2025
48AQI
48AQI
13th March 2025
44AQI
44AQI
14th March 2025
40AQI
40AQI
15th March 2025
38AQI
38AQI
16th March 2025
25AQI
25AQI
17th March 2025
21AQI
21AQI
18th March 2025
24AQI
24AQI
19th March 2025
17AQI
17AQI
20th March 2025
24AQI
24AQI
21st March 2025
39AQI
39AQI
22nd March 2025
47AQI
47AQI
23rd March 2025
54AQI
54AQI
24th March 2025
55AQI
55AQI
25th March 2025
72AQI
72AQI
26th March 2025
78AQI
78AQI
27th March 2025
72AQI
72AQI
28th March 2025
47AQI
47AQI
29th March 2025
36AQI
36AQI
30th March 2025
41AQI
41AQI
31st March 2025
33AQI
33AQI
1st April 2025
28AQI
28AQI
2nd April 2025
22AQI
22AQI
3rd April 2025
23AQI
23AQI
4th April 2025
24AQI
24AQI
5th April 2025
27AQI
27AQI
6th April 2025
23AQI
23AQI
7th April 2025
27AQI
27AQI
8th April 2025
36AQI
36AQI
9th April 2025
29AQI
29AQI
10th April 2025
44AQI
44AQI
11th April 2025
39AQI
39AQI
12th April 2025
39AQI
39AQI
13th April 2025
32AQI
32AQI
14th April 2025
38AQI
38AQI
15th April 2025
30AQI
30AQI
16th April 2025
29AQI
29AQI
17th April 2025
45AQI
45AQI
18th April 2025
50AQI
50AQI
19th April 2025
60AQI
60AQI
20th April 2025
48AQI
48AQI
21st April 2025
46AQI
46AQI
22nd April 2025
44AQI
44AQI
23rd April 2025
29AQI
29AQI
24th April 2025
38AQI
38AQI
25th April 2025
43AQI
43AQI
26th April 2025
46AQI
46AQI
27th April 2025
49AQI
49AQI
28th April 2025
43AQI
43AQI
29th April 2025
33AQI
33AQI
30th April 2025
45AQI
45AQI
1st May 2025
37AQI
37AQI
2nd May 2025
29AQI
29AQI
3rd May 2025
28AQI
28AQI
4th May 2025
37AQI
37AQI
5th May 2025
31AQI
31AQI
6th May 2025
27AQI
27AQI
7th May 2025
22AQI
22AQI
8th May 2025
28AQI
28AQI
9th May 2025
28AQI
28AQI
10th May 2025
21AQI
21AQI
11th May 2025
21AQI
21AQI
12th May 2025
23AQI
23AQI
13th May 2025
31AQI
31AQI
14th May 2025
32AQI
32AQI
15th May 2025
32AQI
32AQI
16th May 2025
38AQI
38AQI
17th May 2025
24AQI
24AQI
18th May 2025
41AQI
41AQI
19th May 2025
42AQI
42AQI
20th May 2025
61AQI
61AQI
21st May 2025
51AQI
51AQI
22nd May 2025
40AQI
40AQI
23rd May 2025
42AQI
42AQI
24th May 2025
39AQI
39AQI
25th May 2025
28AQI
28AQI
26th May 2025
28AQI
28AQI
27th May 2025
24AQI
24AQI
28th May 2025
24AQI
24AQI
29th May 2025
30AQI
30AQI
30th May 2025
23AQI
23AQI
31st May 2025
17AQI
17AQI
1st June 2025
22AQI
22AQI
2nd June 2025
27AQI
27AQI
3rd June 2025
31AQI
31AQI
4th June 2025
23AQI
23AQI
5th June 2025
35AQI
35AQI
6th June 2025
39AQI
39AQI
7th June 2025
44AQI
44AQI
8th June 2025
53AQI
53AQI
9th June 2025
42AQI
42AQI
10th June 2025
34AQI
34AQI
11th June 2025
29AQI
29AQI
12th June 2025
36AQI
36AQI
13th June 2025
38AQI
38AQI
14th June 2025
30AQI
30AQI
15th June 2025
25AQI
25AQI
16th June 2025
29AQI
29AQI
17th June 2025
41AQI
41AQI
18th June 2025
33AQI
33AQI
19th June 2025
35AQI
35AQI
20th June 2025
34AQI
34AQI
21st June 2025
30AQI
30AQI
22nd June 2025
20AQI
20AQI
23rd June 2025
21AQI
21AQI
24th June 2025
19AQI
19AQI
25th June 2025
17AQI
17AQI
26th June 2025
17AQI
17AQI
27th June 2025
26AQI
26AQI
28th June 2025
28AQI
28AQI
29th June 2025
29AQI
29AQI
30th June 2025
34AQI
34AQI
1st July 2025
39AQI
39AQI
2nd July 2025
46AQI
46AQI
3rd July 2025
47AQI
47AQI
4th July 2025
47AQI
47AQI
5th July 2025
49AQI
49AQI
6th July 2025
61AQI
61AQI
7th July 2025
77AQI
77AQI
8th July 2025
77AQI
77AQI
9th July 2025
83AQI
83AQI
10th July 2025
63AQI
63AQI
11th July 2025
50AQI
50AQI
12th July 2025
53AQI
53AQI
13th July 2025
54AQI
54AQI
14th July 2025
42AQI
42AQI
15th July 2025
43AQI
43AQI
16th July 2025
41AQI
41AQI
17th July 2025
44AQI
44AQI
18th July 2025
37AQI
37AQI
19th July 2025
34AQI
34AQI
20th July 2025
35AQI
35AQI
21st July 2025
38AQI
38AQI
22nd July 2025
39AQI
39AQI
23rd July 2025
43AQI
43AQI
24th July 2025
44AQI
44AQI
25th July 2025
41AQI
41AQI
26th July 2025
40AQI
40AQI
27th July 2025
38AQI
38AQI
28th July 2025
43AQI
43AQI
29th July 2025
39AQI
39AQI
30th July 2025
34AQI
34AQI
31st July 2025
34AQI
34AQI
1st August 2025
33AQI
33AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
46AQI
46AQI
4th August 2025
61AQI
61AQI
5th August 2025
52AQI
52AQI
6th August 2025
50AQI
50AQI
7th August 2025
47AQI
47AQI
8th August 2025
45AQI
45AQI
9th August 2025
49AQI
49AQI
10th August 2025
37AQI
37AQI
11th August 2025
39AQI
39AQI
12th August 2025
36AQI
36AQI
35AQI
36AQI
42AQI
37AQI
32AQI
31AQI
47AQI
45AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202537AQI
31
27
1
24
7
29
1
29
2
29
1
24
7
10
2
203
21
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
June31AQI
202441AQI
25
6
27
2
23
8
16
14
26
5
25
5
16
15
26
5
27
3
27
4
25
5
31
294
72
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
December33AQI
202344AQI
22
9
16
12
16
15
16
14
23
8
17
13
19
12
28
3
28
2
29
2
18
11
19
12
251
113
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
August31AQI
202241AQI
26
5
14
7
16
15
12
5
22
9
18
12
17
4
1
26
2
26
5
20
10
30
1
228
75
Highest AQI recorded in
March48AQI
Lowest AQI recorded in
August28AQI
202140AQI
22
9
20
8
21
8
2
23
7
24
7
27
3
31
25
6
30
28
3
21
9
21
10
293
70
2
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
July32AQI
202039AQI
10
3
16
5
17
1
22
8
30
1
19
12
19
26
5
17
13
20
11
196
59
Highest AQI recorded in
August46AQI
Lowest AQI recorded in
September29AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
44AQILeast Polluted Year Recorded
2025(Avg.)
37AQISuwa's annual 2025 AQI (37) shows an average percentage change of -8.2% (improved AQI) compared to previous years: 2020 (39), 2021 (40), 2022 (41), 2023 (44), 2024 (41).
