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
Niiza, Saitama, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
28th Aug 2021
78AQILowest AQI recorded on
25th Aug 2023
13AQISame Day Analysis (10th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Niiza, Saitama, Japan
AQI
Day
Night
.
4 AM10th Aug 2025
6 PM
3 AM11th Aug 2025
Day time
Avg. Highest Time
4AM10th Aug
47AQI
Avg. Lowest Time
4PM10th Aug
21AQI
Night time
Avg. Highest Time
2AM11th Aug
49AQI
Avg. Lowest Time
7PM10th Aug
23AQI
In the last 24 hours,
Niiza's AQI reached its highest point of 49 at 2 AM during the Night, while the lowest point, 21, was recorded at 4 PM during the Day between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Niiza, Saitama, Japan
JulAug
12th - 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 - 08th08th - 09th09th - 10th10th - 11th11th
Day
Night
12th Jul 2025654 AMAQI
12th Jul 2025625 AMAQI
12th Jul 2025626 AMAQI
12th Jul 2025627 AMAQI
12th Jul 2025628 AMAQI
12th Jul 2025419 AMAQI
12th Jul 20253710 AMAQI
12th Jul 20254011 AMAQI
12th Jul 20254112 PMAQI
12th Jul 2025491 PMAQI
12th Jul 2025522 PMAQI
12th Jul 2025503 PMAQI
12th Jul 2025504 PMAQI
12th Jul 2025505 PMAQI
12th Jul 2025486 PMAQI
12th Jul 2025477 PMAQI
12th Jul 2025488 PMAQI
12th Jul 2025569 PMAQI
12th Jul 20255610 PMAQI
12th Jul 20255611 PMAQI
13th Jul 20255612 AMAQI
13th Jul 2025581 AMAQI
13th Jul 2025622 AMAQI
13th Jul 2025623 AMAQI
25°C22/29°C
13th Jul 2025614 AMAQI
13th Jul 2025595 AMAQI
13th Jul 2025596 AMAQI
13th Jul 2025597 AMAQI
13th Jul 2025608 AMAQI
13th Jul 2025479 AMAQI
13th Jul 20254110 AMAQI
13th Jul 20254811 AMAQI
13th Jul 20255212 PMAQI
13th Jul 2025521 PMAQI
13th Jul 2025522 PMAQI
13th Jul 2025523 PMAQI
13th Jul 2025504 PMAQI
13th Jul 2025505 PMAQI
13th Jul 2025496 PMAQI
13th Jul 2025507 PMAQI
13th Jul 2025498 PMAQI
13th Jul 2025539 PMAQI
13th Jul 20255310 PMAQI
13th Jul 20255311 PMAQI
14th Jul 20255312 AMAQI
14th Jul 2025551 AMAQI
14th Jul 2025592 AMAQI
14th Jul 2025593 AMAQI
27°C24/32°C
14th Jul 2025594 AMAQI
14th Jul 2025585 AMAQI
14th Jul 2025586 AMAQI
14th Jul 2025587 AMAQI
14th Jul 2025588 AMAQI
14th Jul 2025369 AMAQI
14th Jul 20252510 AMAQI
14th Jul 20252111 AMAQI
14th Jul 20252312 PMAQI
14th Jul 2025301 PMAQI
14th Jul 2025292 PMAQI
14th Jul 2025273 PMAQI
14th Jul 2025304 PMAQI
14th Jul 2025325 PMAQI
14th Jul 2025316 PMAQI
14th Jul 2025317 PMAQI
14th Jul 2025358 PMAQI
14th Jul 2025509 PMAQI
14th Jul 20254910 PMAQI
14th Jul 20254911 PMAQI
15th Jul 20255012 AMAQI
15th Jul 2025521 AMAQI
15th Jul 2025562 AMAQI
15th Jul 2025563 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 2025369 AMAQI
15th Jul 20253110 AMAQI
15th Jul 20252611 AMAQI
15th Jul 20252612 PMAQI
15th Jul 2025351 PMAQI
15th Jul 2025362 PMAQI
15th Jul 2025393 PMAQI
15th Jul 2025354 PMAQI
15th Jul 2025285 PMAQI
15th Jul 2025326 PMAQI
15th Jul 2025357 PMAQI
15th Jul 2025338 PMAQI
15th Jul 2025469 PMAQI
15th Jul 20254610 PMAQI
15th Jul 20254811 PMAQI
16th Jul 20254912 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 2025529 AMAQI
16th Jul 20254810 AMAQI
16th Jul 20253911 AMAQI
16th Jul 20252712 PMAQI
16th Jul 2025281 PMAQI
16th Jul 2025292 PMAQI
16th Jul 2025283 PMAQI
16th Jul 2025284 PMAQI
16th Jul 2025295 PMAQI
16th Jul 2025286 PMAQI
16th Jul 2025287 PMAQI
16th Jul 2025318 PMAQI
16th Jul 2025449 PMAQI
16th Jul 20254410 PMAQI
16th Jul 20254411 PMAQI
17th Jul 20254412 AMAQI
17th Jul 2025481 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
29°C26/31°C
17th Jul 2025524 AMAQI
17th Jul 2025515 AMAQI
17th Jul 2025506 AMAQI
17th Jul 2025507 AMAQI
17th Jul 2025508 AMAQI
17th Jul 2025349 AMAQI
17th Jul 20253410 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20253512 PMAQI
17th Jul 2025361 PMAQI
17th Jul 2025332 PMAQI
17th Jul 2025363 PMAQI
17th Jul 2025374 PMAQI
17th Jul 2025365 PMAQI
17th Jul 2025366 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025428 PMAQI
17th Jul 2025479 PMAQI
17th Jul 20254610 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 2025494 AMAQI
18th Jul 2025475 AMAQI
18th Jul 2025476 AMAQI
18th Jul 2025477 AMAQI
18th Jul 2025478 AMAQI
18th Jul 2025359 AMAQI
18th Jul 20253110 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252512 PMAQI
18th Jul 2025291 PMAQI
18th Jul 2025272 PMAQI
18th Jul 2025283 PMAQI
18th Jul 2025284 PMAQI
18th Jul 2025275 PMAQI
18th Jul 2025286 PMAQI
18th Jul 2025297 PMAQI
18th Jul 2025328 PMAQI
18th Jul 2025419 PMAQI
18th Jul 20254110 PMAQI
18th Jul 20254111 PMAQI
19th Jul 20254112 AMAQI
19th Jul 2025431 AMAQI
19th Jul 2025472 AMAQI
19th Jul 2025473 AMAQI
29°C26/33°C
19th Jul 2025464 AMAQI
19th Jul 2025445 AMAQI
19th Jul 2025456 AMAQI
19th Jul 2025457 AMAQI
19th Jul 2025448 AMAQI
19th Jul 2025279 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252111 AMAQI
19th Jul 20252012 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025252 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025274 PMAQI
19th Jul 2025275 PMAQI
19th Jul 2025266 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025298 PMAQI
19th Jul 2025379 PMAQI
19th Jul 20253710 PMAQI
19th Jul 20253711 PMAQI
20th Jul 20253712 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 2025426 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025329 AMAQI
20th Jul 20252710 AMAQI
20th Jul 20252611 AMAQI
20th Jul 20252512 PMAQI
20th Jul 2025281 PMAQI
20th Jul 2025292 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025294 PMAQI
20th Jul 2025275 PMAQI
20th Jul 2025296 PMAQI
20th Jul 2025337 PMAQI
20th Jul 2025338 PMAQI
20th Jul 2025369 PMAQI
20th Jul 20253610 PMAQI
20th Jul 20253611 PMAQI
21st Jul 20253612 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025413 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 2025299 AMAQI
21st Jul 20253510 AMAQI
21st Jul 20254011 AMAQI
21st Jul 20254412 PMAQI
21st Jul 2025461 PMAQI
21st Jul 2025462 PMAQI
21st Jul 2025443 PMAQI
21st Jul 2025364 PMAQI
21st Jul 2025355 PMAQI
21st Jul 2025346 PMAQI
21st Jul 2025357 PMAQI
21st Jul 2025328 PMAQI
21st Jul 2025349 PMAQI
21st Jul 20253410 PMAQI
21st Jul 20253311 PMAQI
22nd Jul 20253312 AMAQI
22nd Jul 2025351 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025383 AMAQI
31°C28/36°C
22nd Jul 2025384 AMAQI
22nd Jul 2025395 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025397 AMAQI
22nd Jul 2025398 AMAQI
22nd Jul 2025339 AMAQI
22nd Jul 20253910 AMAQI
22nd Jul 20254611 AMAQI
22nd Jul 20255112 PMAQI
22nd Jul 2025531 PMAQI
22nd Jul 2025522 PMAQI
22nd Jul 2025523 PMAQI
22nd Jul 2025454 PMAQI
22nd Jul 2025425 PMAQI
22nd Jul 2025386 PMAQI
22nd Jul 2025327 PMAQI
22nd Jul 2025308 PMAQI
22nd Jul 2025329 PMAQI
22nd Jul 20253210 PMAQI
22nd Jul 20253211 PMAQI
23rd Jul 20253212 AMAQI
23rd Jul 2025341 AMAQI
23rd Jul 2025372 AMAQI
23rd Jul 2025373 AMAQI
32°C29/36°C
23rd Jul 2025384 AMAQI
23rd Jul 2025405 AMAQI
23rd Jul 2025396 AMAQI
23rd Jul 2025407 AMAQI
23rd Jul 2025398 AMAQI
23rd Jul 2025399 AMAQI
23rd Jul 20255410 AMAQI
23rd Jul 20255711 AMAQI
23rd Jul 20256012 PMAQI
23rd Jul 2025601 PMAQI
23rd Jul 2025592 PMAQI
23rd Jul 2025573 PMAQI
23rd Jul 2025514 PMAQI
23rd Jul 2025495 PMAQI
23rd Jul 2025466 PMAQI
23rd Jul 2025417 PMAQI
23rd Jul 2025348 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253210 PMAQI
23rd Jul 20253211 PMAQI
24th Jul 20253312 AMAQI
24th Jul 2025351 AMAQI
24th Jul 2025372 AMAQI
24th Jul 2025373 AMAQI
32°C29/36°C
24th Jul 2025384 AMAQI
24th Jul 2025425 AMAQI
24th Jul 2025416 AMAQI
24th Jul 2025417 AMAQI
24th Jul 2025418 AMAQI
24th Jul 2025459 AMAQI
24th Jul 20255510 AMAQI
24th Jul 20256111 AMAQI
24th Jul 20256212 PMAQI
24th Jul 2025601 PMAQI
24th Jul 2025602 PMAQI
24th Jul 2025603 PMAQI
24th Jul 2025544 PMAQI
24th Jul 2025485 PMAQI
24th Jul 2025436 PMAQI
24th Jul 2025347 PMAQI
24th Jul 2025338 PMAQI
24th Jul 2025359 PMAQI
24th Jul 20253610 PMAQI
24th Jul 20253711 PMAQI
25th Jul 20253612 AMAQI
25th Jul 2025361 AMAQI
25th Jul 2025382 AMAQI
25th Jul 2025383 AMAQI
32°C29/37°C
25th Jul 2025394 AMAQI
25th Jul 2025435 AMAQI
25th Jul 2025436 AMAQI
25th Jul 2025437 AMAQI
25th Jul 2025438 AMAQI
25th Jul 2025529 AMAQI
25th Jul 20255710 AMAQI
25th Jul 20255911 AMAQI
25th Jul 20256012 PMAQI
25th Jul 2025561 PMAQI
25th Jul 2025532 PMAQI
25th Jul 2025453 PMAQI
25th Jul 2025384 PMAQI
25th Jul 2025335 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025297 PMAQI
25th Jul 2025298 PMAQI
25th Jul 2025339 PMAQI
25th Jul 20253310 PMAQI
25th Jul 20253311 PMAQI
26th Jul 20253212 AMAQI
26th Jul 2025341 AMAQI
26th Jul 2025392 AMAQI
26th Jul 2025403 AMAQI
32°C29/37°C
26th Jul 2025404 AMAQI
26th Jul 2025435 AMAQI
26th Jul 2025436 AMAQI
26th Jul 2025437 AMAQI
26th Jul 2025438 AMAQI
26th Jul 2025479 AMAQI
26th Jul 20255610 AMAQI
26th Jul 20255811 AMAQI
26th Jul 20256012 PMAQI
26th Jul 2025561 PMAQI
26th Jul 2025492 PMAQI
26th Jul 2025413 PMAQI
26th Jul 2025354 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025296 PMAQI
26th Jul 2025297 PMAQI
26th Jul 2025288 PMAQI
26th Jul 2025339 PMAQI
26th Jul 20253310 PMAQI
26th Jul 20253311 PMAQI
27th Jul 20253212 AMAQI
27th Jul 2025351 AMAQI
27th Jul 2025382 AMAQI
27th Jul 2025393 AMAQI
32°C29/37°C
27th Jul 2025404 AMAQI
27th Jul 2025435 AMAQI
27th Jul 2025426 AMAQI
27th Jul 2025427 AMAQI
27th Jul 2025428 AMAQI
27th Jul 2025409 AMAQI
27th Jul 20254510 AMAQI
27th Jul 20255511 AMAQI
27th Jul 20255212 PMAQI
27th Jul 2025491 PMAQI
27th Jul 2025432 PMAQI
27th Jul 2025403 PMAQI
27th Jul 2025354 PMAQI
27th Jul 2025295 PMAQI
27th Jul 2025266 PMAQI
27th Jul 2025257 PMAQI
27th Jul 2025268 PMAQI
27th Jul 2025319 PMAQI
27th Jul 20253110 PMAQI
27th Jul 20253111 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025351 AMAQI
28th Jul 2025382 AMAQI
28th Jul 2025383 AMAQI
32°C29/36°C
28th Jul 2025394 AMAQI
28th Jul 2025405 AMAQI
28th Jul 2025406 AMAQI
28th Jul 2025407 AMAQI
28th Jul 2025408 AMAQI
28th Jul 2025299 AMAQI
28th Jul 20253710 AMAQI
28th Jul 20254111 AMAQI
28th Jul 20254912 PMAQI
28th Jul 2025531 PMAQI
28th Jul 2025542 PMAQI
28th Jul 2025553 PMAQI
28th Jul 2025574 PMAQI
28th Jul 2025575 PMAQI
28th Jul 2025526 PMAQI
28th Jul 2025437 PMAQI
28th Jul 2025348 PMAQI
28th Jul 2025349 PMAQI
28th Jul 20253410 PMAQI
28th Jul 20253411 PMAQI
29th Jul 20253412 AMAQI
29th Jul 2025341 AMAQI
29th Jul 2025382 AMAQI
29th Jul 2025363 AMAQI
32°C29/37°C
29th Jul 2025384 AMAQI
29th Jul 2025405 AMAQI
29th Jul 2025416 AMAQI
29th Jul 2025407 AMAQI
29th Jul 2025398 AMAQI
29th Jul 2025339 AMAQI
29th Jul 20254010 AMAQI
29th Jul 20254611 AMAQI
29th Jul 20254912 PMAQI
29th Jul 2025481 PMAQI
29th Jul 2025492 PMAQI
29th Jul 2025493 PMAQI
29th Jul 2025494 PMAQI
29th Jul 2025455 PMAQI
29th Jul 2025376 PMAQI
29th Jul 2025307 PMAQI
29th Jul 2025298 PMAQI
29th Jul 2025329 PMAQI
29th Jul 20253310 PMAQI
29th Jul 20253211 PMAQI
30th Jul 20253312 AMAQI
30th Jul 2025351 AMAQI
30th Jul 2025372 AMAQI
30th Jul 2025373 AMAQI
32°C28/38°C
30th Jul 2025374 AMAQI
30th Jul 2025395 AMAQI
30th Jul 2025396 AMAQI
30th Jul 2025397 AMAQI
30th Jul 2025398 AMAQI
30th Jul 2025239 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252912 PMAQI
30th Jul 2025321 PMAQI
30th Jul 2025322 PMAQI
30th Jul 2025343 PMAQI
30th Jul 2025324 PMAQI
30th Jul 2025305 PMAQI
30th Jul 2025306 PMAQI
30th Jul 2025317 PMAQI
30th Jul 2025348 PMAQI
30th Jul 2025369 PMAQI
30th Jul 20253510 PMAQI
30th Jul 20253511 PMAQI
31st Jul 20253512 AMAQI
31st Jul 2025351 AMAQI
31st Jul 2025362 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 20254411 AMAQI
31st Jul 20254012 PMAQI
31st Jul 2025381 PMAQI
31st Jul 2025382 PMAQI
31st Jul 2025383 PMAQI
31st Jul 2025324 PMAQI
31st Jul 2025275 PMAQI
31st Jul 2025266 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025278 PMAQI
31st Jul 2025289 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252712 AMAQI
1st Aug 2025321 AMAQI
1st Aug 2025332 AMAQI
1st Aug 2025343 AMAQI
29°C26/35°C
1st Aug 2025354 AMAQI
1st Aug 2025345 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025347 AMAQI
1st Aug 2025368 AMAQI
1st Aug 2025379 AMAQI
1st Aug 20252910 AMAQI
1st Aug 20254411 AMAQI
1st Aug 20254212 PMAQI
1st Aug 2025411 PMAQI
1st Aug 2025372 PMAQI
1st Aug 2025343 PMAQI
1st Aug 2025424 PMAQI
1st Aug 2025325 PMAQI
1st Aug 2025396 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025288 PMAQI
1st Aug 2025289 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20252911 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025301 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025373 AMAQI
29°C27/32°C
2nd Aug 2025374 AMAQI
2nd Aug 2025385 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025367 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025379 AMAQI
2nd Aug 20253310 AMAQI
2nd Aug 20254311 AMAQI
2nd Aug 20253812 PMAQI
2nd Aug 2025441 PMAQI
2nd Aug 2025562 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025524 PMAQI
2nd Aug 2025535 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025547 PMAQI
2nd Aug 2025418 PMAQI
2nd Aug 2025389 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 2025395 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025398 AMAQI
3rd Aug 2025479 AMAQI
3rd Aug 20255410 AMAQI
3rd Aug 20255511 AMAQI
3rd Aug 20256012 PMAQI
3rd Aug 2025541 PMAQI
3rd Aug 2025572 PMAQI
3rd Aug 2025523 PMAQI
3rd Aug 2025504 PMAQI
3rd Aug 2025535 PMAQI
3rd Aug 2025556 PMAQI
3rd Aug 2025517 PMAQI
3rd Aug 2025518 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254011 PMAQI
4th Aug 20253812 AMAQI
4th Aug 2025371 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025403 AMAQI
32°C28/37°C
4th Aug 2025424 AMAQI
4th Aug 2025435 AMAQI
4th Aug 2025436 AMAQI
4th Aug 2025437 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025629 AMAQI
4th Aug 20256510 AMAQI
4th Aug 20258011 AMAQI
4th Aug 20257912 PMAQI
4th Aug 2025901 PMAQI
4th Aug 2025932 PMAQI
4th Aug 2025873 PMAQI
4th Aug 2025894 PMAQI
4th Aug 2025955 PMAQI
4th Aug 2025826 PMAQI
4th Aug 2025747 PMAQI
4th Aug 2025668 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20254611 PMAQI
5th Aug 20255612 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025412 AMAQI
5th Aug 2025413 AMAQI
33°C30/38°C
5th Aug 2025514 AMAQI
5th Aug 2025545 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025527 AMAQI
5th Aug 2025538 AMAQI
5th Aug 2025589 AMAQI
5th Aug 20256410 AMAQI
5th Aug 20256011 AMAQI
5th Aug 20256012 PMAQI
5th Aug 2025581 PMAQI
5th Aug 2025572 PMAQI
5th Aug 2025573 PMAQI
5th Aug 2025604 PMAQI
5th Aug 2025525 PMAQI
5th Aug 2025506 PMAQI
5th Aug 2025477 PMAQI
5th Aug 2025508 PMAQI
5th Aug 2025489 PMAQI
5th Aug 20254810 PMAQI
5th Aug 20254311 PMAQI
6th Aug 20254712 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 2025538 AMAQI
6th Aug 2025439 AMAQI
6th Aug 20253910 AMAQI
6th Aug 20254211 AMAQI
6th Aug 20255112 PMAQI
6th Aug 2025511 PMAQI
6th Aug 2025542 PMAQI
6th Aug 2025503 PMAQI
6th Aug 2025494 PMAQI
6th Aug 2025585 PMAQI
6th Aug 2025546 PMAQI
6th Aug 2025587 PMAQI
6th Aug 2025548 PMAQI
6th Aug 2025479 PMAQI
6th Aug 20254910 PMAQI
6th Aug 20254711 PMAQI
7th Aug 20254612 AMAQI
7th Aug 2025481 AMAQI
7th Aug 2025522 AMAQI
7th Aug 2025523 AMAQI
33°C30/38°C
7th Aug 2025514 AMAQI
7th Aug 2025515 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025467 AMAQI
7th Aug 2025518 AMAQI
7th Aug 2025479 AMAQI
7th Aug 20254210 AMAQI
7th Aug 20254711 AMAQI
7th Aug 20253312 PMAQI
7th Aug 2025301 PMAQI
7th Aug 2025292 PMAQI
7th Aug 2025303 PMAQI
7th Aug 2025424 PMAQI
7th Aug 2025505 PMAQI
7th Aug 2025526 PMAQI
7th Aug 2025527 PMAQI
7th Aug 2025528 PMAQI
7th Aug 2025499 PMAQI
7th Aug 20254910 PMAQI
7th Aug 20254911 PMAQI
8th Aug 20254912 AMAQI
8th Aug 2025491 AMAQI
8th Aug 2025502 AMAQI
8th Aug 2025493 AMAQI
32°C29/34°C
8th Aug 2025484 AMAQI
8th Aug 2025485 AMAQI
8th Aug 2025486 AMAQI
8th Aug 2025487 AMAQI
8th Aug 2025488 AMAQI
8th Aug 2025379 AMAQI
8th Aug 20253110 AMAQI
8th Aug 20253311 AMAQI
8th Aug 20253512 PMAQI
8th Aug 2025401 PMAQI
8th Aug 2025402 PMAQI
8th Aug 2025443 PMAQI
8th Aug 2025384 PMAQI
8th Aug 2025365 PMAQI
8th Aug 2025506 PMAQI
8th Aug 2025517 PMAQI
8th Aug 2025528 PMAQI
8th Aug 2025509 PMAQI
8th Aug 20254710 PMAQI
8th Aug 20254511 PMAQI
9th Aug 20254412 AMAQI
9th Aug 2025471 AMAQI
9th Aug 2025502 AMAQI
9th Aug 2025503 AMAQI
30°C25/36°C
9th Aug 2025494 AMAQI
9th Aug 2025485 AMAQI
9th Aug 2025486 AMAQI
9th Aug 2025477 AMAQI
9th Aug 2025488 AMAQI
9th Aug 2025369 AMAQI
9th Aug 20253210 AMAQI
9th Aug 20253611 AMAQI
9th Aug 20253812 PMAQI
9th Aug 2025431 PMAQI
9th Aug 2025462 PMAQI
9th Aug 2025543 PMAQI
9th Aug 2025604 PMAQI
9th Aug 2025625 PMAQI
9th Aug 2025586 PMAQI
9th Aug 2025557 PMAQI
9th Aug 2025538 PMAQI
9th Aug 2025529 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 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 20253310 AMAQI
10th Aug 20252611 AMAQI
10th Aug 20252412 PMAQI
10th Aug 2025281 PMAQI
10th Aug 2025272 PMAQI
10th Aug 2025253 PMAQI
10th Aug 2025214 PMAQI
10th Aug 2025245 PMAQI
10th Aug 2025236 PMAQI
10th Aug 2025237 PMAQI
10th Aug 2025278 PMAQI
10th Aug 2025409 PMAQI
10th Aug 20254510 PMAQI
10th Aug 20254611 PMAQI
11th Aug 20254412 AMAQI
11th Aug 2025451 AMAQI
11th Aug 2025492 AMAQI
11th Aug 2025483 AMAQI
27°C26/27°C
11th Aug 2025484 AMAQI
4 AM11th Aug 2025465 AMAQI
11th Aug 2025456 AMAQI
11th Aug 2025467 AMAQI
11th Aug 2025458 AMAQI
11th Aug 2025339 AMAQI
11th Aug 20252910 AMAQI
11th Aug 20252911 AMAQI
11 AM11th Aug 20252712 PMAQI
11th Aug 2025271 PMAQI
11th Aug 2025302 PMAQI
11th Aug 2025353 PMAQI
11th Aug 2025334 PMAQI
11th Aug 2025475 PMAQI
11th Aug 2025416 PMAQI
6 PM11th Aug 2025347 PMAQI
11th Aug 2025348 PMAQI
11th Aug 2025349 PMAQI
11th Aug 20253410 PMAQI
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
45AQI
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. 45), while the lowest AQI was between 9 AM to 10 AM (Avg. 40).
Night time
Avg. Highest Time
2 AM - 3 AM
45AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
7 PM - 8 PM
39AQI
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. 45), while the lowest AQI was between 7 PM to 8 PM (Avg. 39).
2025 Days Vs Air Quality
Niiza, Saitama, Japan
2025
90%
200
10%
22
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
200 DaysModerate
22 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 223 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
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
31AQI
31AQI
2nd January 2025
31AQI
31AQI
3rd January 2025
24AQI
24AQI
4th January 2025
27AQI
27AQI
5th January 2025
34AQI
34AQI
6th January 2025
48AQI
48AQI
7th January 2025
31AQI
31AQI
8th January 2025
34AQI
34AQI
9th January 2025
29AQI
29AQI
10th January 2025
28AQI
28AQI
11th January 2025
29AQI
29AQI
12th January 2025
38AQI
38AQI
13th January 2025
31AQI
31AQI
14th January 2025
37AQI
37AQI
15th January 2025
35AQI
35AQI
16th January 2025
31AQI
31AQI
17th January 2025
31AQI
31AQI
18th January 2025
33AQI
33AQI
19th January 2025
45AQI
45AQI
20th January 2025
42AQI
42AQI
21st January 2025
41AQI
41AQI
22nd January 2025
39AQI
39AQI
23rd January 2025
47AQI
47AQI
24th January 2025
44AQI
44AQI
25th January 2025
37AQI
37AQI
26th January 2025
35AQI
35AQI
27th January 2025
33AQI
33AQI
28th January 2025
40AQI
40AQI
29th January 2025
29AQI
29AQI
30th January 2025
33AQI
33AQI
31st January 2025
29AQI
29AQI
1st February 2025
42AQI
42AQI
2nd February 2025
36AQI
36AQI
3rd February 2025
41AQI
41AQI
4th February 2025
33AQI
33AQI
5th February 2025
33AQI
33AQI
6th February 2025
28AQI
28AQI
7th February 2025
29AQI
29AQI
8th February 2025
29AQI
29AQI
9th February 2025
28AQI
28AQI
10th February 2025
28AQI
28AQI
11th February 2025
32AQI
32AQI
12th February 2025
38AQI
38AQI
13th February 2025
48AQI
48AQI
14th February 2025
32AQI
32AQI
15th February 2025
45AQI
45AQI
16th February 2025
40AQI
40AQI
17th February 2025
42AQI
42AQI
18th February 2025
33AQI
33AQI
19th February 2025
33AQI
33AQI
20th February 2025
30AQI
30AQI
21st February 2025
31AQI
31AQI
22nd February 2025
30AQI
30AQI
23rd February 2025
31AQI
31AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
37AQI
37AQI
27th February 2025
39AQI
39AQI
28th February 2025
53AQI
53AQI
1st March 2025
54AQI
54AQI
2nd March 2025
59AQI
59AQI
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
36AQI
36AQI
11th March 2025
38AQI
38AQI
12th March 2025
48AQI
48AQI
13th March 2025
44AQI
44AQI
14th March 2025
39AQI
39AQI
15th March 2025
36AQI
36AQI
16th March 2025
24AQI
24AQI
17th March 2025
21AQI
21AQI
18th March 2025
23AQI
23AQI
19th March 2025
17AQI
17AQI
20th March 2025
23AQI
23AQI
21st March 2025
38AQI
38AQI
22nd March 2025
46AQI
46AQI
23rd March 2025
53AQI
53AQI
24th March 2025
54AQI
54AQI
25th March 2025
71AQI
71AQI
26th March 2025
76AQI
76AQI
27th March 2025
71AQI
71AQI
28th March 2025
47AQI
47AQI
29th March 2025
36AQI
36AQI
30th March 2025
40AQI
40AQI
31st March 2025
32AQI
32AQI
1st April 2025
28AQI
28AQI
2nd April 2025
21AQI
21AQI
3rd April 2025
22AQI
22AQI
4th April 2025
23AQI
23AQI
5th April 2025
26AQI
26AQI
6th April 2025
22AQI
22AQI
7th April 2025
27AQI
27AQI
8th April 2025
34AQI
34AQI
9th April 2025
27AQI
27AQI
10th April 2025
43AQI
43AQI
11th April 2025
39AQI
39AQI
12th April 2025
38AQI
38AQI
13th April 2025
31AQI
31AQI
14th April 2025
37AQI
37AQI
15th April 2025
29AQI
29AQI
16th April 2025
28AQI
28AQI
17th April 2025
44AQI
44AQI
18th April 2025
50AQI
50AQI
19th April 2025
59AQI
59AQI
20th April 2025
47AQI
47AQI
21st April 2025
45AQI
45AQI
22nd April 2025
43AQI
43AQI
23rd April 2025
28AQI
28AQI
24th April 2025
37AQI
37AQI
25th April 2025
42AQI
42AQI
26th April 2025
44AQI
44AQI
27th April 2025
47AQI
47AQI
28th April 2025
41AQI
41AQI
29th April 2025
31AQI
31AQI
30th April 2025
42AQI
42AQI
1st May 2025
36AQI
36AQI
2nd May 2025
29AQI
29AQI
3rd May 2025
26AQI
26AQI
4th May 2025
36AQI
36AQI
5th May 2025
30AQI
30AQI
6th May 2025
27AQI
27AQI
7th May 2025
22AQI
22AQI
8th May 2025
28AQI
28AQI
9th May 2025
28AQI
28AQI
10th May 2025
20AQI
20AQI
11th May 2025
22AQI
22AQI
12th May 2025
24AQI
24AQI
13th May 2025
31AQI
31AQI
14th May 2025
33AQI
33AQI
15th May 2025
34AQI
34AQI
16th May 2025
39AQI
39AQI
17th May 2025
24AQI
24AQI
18th May 2025
40AQI
40AQI
19th May 2025
41AQI
41AQI
20th May 2025
60AQI
60AQI
21st May 2025
52AQI
52AQI
22nd May 2025
41AQI
41AQI
23rd May 2025
42AQI
42AQI
24th May 2025
40AQI
40AQI
25th May 2025
28AQI
28AQI
26th May 2025
28AQI
28AQI
27th May 2025
24AQI
24AQI
28th May 2025
25AQI
25AQI
29th May 2025
30AQI
30AQI
30th May 2025
24AQI
24AQI
31st May 2025
17AQI
17AQI
1st June 2025
22AQI
22AQI
2nd June 2025
28AQI
28AQI
3rd June 2025
30AQI
30AQI
4th June 2025
24AQI
24AQI
5th June 2025
36AQI
36AQI
6th June 2025
40AQI
40AQI
7th June 2025
45AQI
45AQI
8th June 2025
54AQI
54AQI
9th June 2025
43AQI
43AQI
10th June 2025
33AQI
33AQI
11th June 2025
30AQI
30AQI
12th June 2025
36AQI
36AQI
13th June 2025
39AQI
39AQI
14th June 2025
31AQI
31AQI
15th June 2025
26AQI
26AQI
16th June 2025
32AQI
32AQI
17th June 2025
43AQI
43AQI
18th June 2025
36AQI
36AQI
19th June 2025
37AQI
37AQI
20th June 2025
37AQI
37AQI
21st June 2025
30AQI
30AQI
22nd June 2025
22AQI
22AQI
23rd June 2025
21AQI
21AQI
24th June 2025
18AQI
18AQI
25th June 2025
17AQI
17AQI
26th June 2025
18AQI
18AQI
27th June 2025
25AQI
25AQI
28th June 2025
25AQI
25AQI
29th June 2025
28AQI
28AQI
30th June 2025
34AQI
34AQI
1st July 2025
38AQI
38AQI
2nd July 2025
44AQI
44AQI
3rd July 2025
46AQI
46AQI
4th July 2025
47AQI
47AQI
5th July 2025
49AQI
49AQI
6th July 2025
58AQI
58AQI
7th July 2025
74AQI
74AQI
8th July 2025
76AQI
76AQI
9th July 2025
81AQI
81AQI
10th July 2025
63AQI
63AQI
11th July 2025
52AQI
52AQI
12th July 2025
55AQI
55AQI
13th July 2025
54AQI
54AQI
14th July 2025
44AQI
44AQI
15th July 2025
44AQI
44AQI
16th July 2025
43AQI
43AQI
17th July 2025
44AQI
44AQI
18th July 2025
39AQI
39AQI
19th July 2025
36AQI
36AQI
20th July 2025
35AQI
35AQI
21st July 2025
37AQI
37AQI
22nd July 2025
38AQI
38AQI
23rd July 2025
41AQI
41AQI
24th July 2025
42AQI
42AQI
25th July 2025
40AQI
40AQI
26th July 2025
39AQI
39AQI
27th July 2025
37AQI
37AQI
28th July 2025
41AQI
41AQI
29th July 2025
38AQI
38AQI
30th July 2025
33AQI
33AQI
31st July 2025
33AQI
33AQI
1st August 2025
33AQI
33AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
45AQI
45AQI
4th August 2025
59AQI
59AQI
5th August 2025
51AQI
51AQI
6th August 2025
50AQI
50AQI
7th August 2025
47AQI
47AQI
8th August 2025
46AQI
46AQI
9th August 2025
49AQI
49AQI
10th August 2025
40AQI
40AQI
35AQI
35AQI
41AQI
36AQI
32AQI
31AQI
46AQI
46AQI
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
23
8
8
2
200
22
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
June31AQI
202438AQI
29
2
28
1
23
8
20
10
26
5
26
4
16
15
30
1
28
2
29
2
26
4
31
312
54
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
December32AQI
202340AQI
26
5
20
8
23
8
20
10
25
6
21
9
21
10
31
29
1
30
1
21
8
22
9
289
75
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
August28AQI
202238AQI
30
1
17
4
28
3
22
8
22
9
18
12
20
4
1
28
30
1
24
6
31
271
48
Highest AQI recorded in
June48AQI
Lowest AQI recorded in
August24AQI
202136AQI
25
6
23
5
27
3
1
29
1
26
5
27
3
30
1
25
6
30
28
3
25
5
27
4
322
42
1
Highest AQI recorded in
May40AQI
Lowest AQI recorded in
July33AQI
202032AQI
13
20
1
18
27
3
31
24
7
19
30
1
24
6
24
7
230
25
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
September23AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
40AQILeast Polluted Year Recorded
2020(Avg.)
32AQINiiza's annual 2025 AQI (37) shows an average percentage change of 0.4% (worsened AQI) compared to previous years: 2020 (32), 2021 (36), 2022 (38), 2023 (40), 2024 (38).
