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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Niigata Prefecture, Tsubame, Niigata, 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

Niigata Prefecture, Tsubame, Niigata, Japan

2022
2023
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
24th Aug 2025
52AQI
Lowest AQI recorded on
14th Aug 2026
17AQI

Same Day Analysis (15th August):
On this day, AQI across the 4 years varied significantly: 2026 ranks 3rd highest AQI at 24 of Good air quality, showing improvement over 2025 and 2023 on the same day.

Day & Night AQI Trend: 14th Aug - 15th Aug 2026

Niigata Prefecture, Tsubame, Niigata, Japan

AQI
Day
Night
.

4 AM14th Aug 2026

6 PM

3 AM15th Aug 2026

Day time
Avg. Highest Time
5AM14th Aug

19AQI

Avg. Lowest Time
4PM14th Aug

14AQI

Night time
Avg. Highest Time
2AM15th Aug

23AQI

Avg. Lowest Time
11PM14th Aug

17AQI

In the last 24 hours,

Niigata Prefecture's AQI reached its highest point of 23 at 2 AM during the Night, while the lowest point, 14, was recorded at 4 PM during the Day between 14th Aug and 15th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Niigata Prefecture, Tsubame, Niigata, Japan

JulAug
17th - 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 - 14th14th - 15th15th
Day
Night
17th Jul 2026284 AMAQI
17th Jul 2026285 AMAQI
17th Jul 2026276 AMAQI
17th Jul 2026287 AMAQI
17th Jul 2026248 AMAQI
17th Jul 2026269 AMAQI
17th Jul 20263010 AMAQI
17th Jul 20262811 AMAQI
17th Jul 20262712 PMAQI
17th Jul 2026241 PMAQI
17th Jul 2026222 PMAQI
17th Jul 2026233 PMAQI
17th Jul 2026294 PMAQI
17th Jul 2026295 PMAQI
17th Jul 2026276 PMAQI
17th Jul 2026257 PMAQI
17th Jul 2026258 PMAQI
17th Jul 2026259 PMAQI
17th Jul 20262510 PMAQI
17th Jul 20262311 PMAQI
18th Jul 20262512 AMAQI
18th Jul 2026251 AMAQI
18th Jul 2026252 AMAQI
18th Jul 2026253 AMAQI

26°C23/32°C

18th Jul 2026234 AMAQI
18th Jul 2026275 AMAQI
18th Jul 2026236 AMAQI
18th Jul 2026237 AMAQI
18th Jul 2026258 AMAQI
18th Jul 2026219 AMAQI
18th Jul 20262110 AMAQI
18th Jul 20262111 AMAQI
18th Jul 20262712 PMAQI
18th Jul 2026251 PMAQI
18th Jul 2026232 PMAQI
18th Jul 2026253 PMAQI
18th Jul 2026234 PMAQI
18th Jul 2026235 PMAQI
18th Jul 2026256 PMAQI
18th Jul 2026257 PMAQI
18th Jul 2026218 PMAQI
18th Jul 2026239 PMAQI
18th Jul 20262110 PMAQI
18th Jul 20262311 PMAQI
19th Jul 20262112 AMAQI
19th Jul 2026231 AMAQI
19th Jul 2026212 AMAQI
19th Jul 2026233 AMAQI

27°C23/31°C

19th Jul 2026234 AMAQI
19th Jul 2026215 AMAQI
19th Jul 2026216 AMAQI
19th Jul 2026257 AMAQI
19th Jul 2026258 AMAQI
19th Jul 2026219 AMAQI
19th Jul 20262510 AMAQI
19th Jul 20262511 AMAQI
19th Jul 20262312 PMAQI
19th Jul 2026211 PMAQI
19th Jul 2026252 PMAQI
19th Jul 2026253 PMAQI
19th Jul 2026274 PMAQI
19th Jul 2026255 PMAQI
19th Jul 2026276 PMAQI
19th Jul 2026257 PMAQI
19th Jul 2026298 PMAQI
19th Jul 2026339 PMAQI
19th Jul 20263610 PMAQI
19th Jul 20264011 PMAQI
20th Jul 20263812 AMAQI
20th Jul 2026381 AMAQI
20th Jul 2026422 AMAQI
20th Jul 2026423 AMAQI

27°C24/32°C

20th Jul 2026384 AMAQI
20th Jul 2026405 AMAQI
20th Jul 2026466 AMAQI
20th Jul 2026427 AMAQI
20th Jul 2026448 AMAQI
20th Jul 2026469 AMAQI
20th Jul 20264910 AMAQI
20th Jul 20264811 AMAQI
20th Jul 20265312 PMAQI
20th Jul 2026531 PMAQI
20th Jul 2026602 PMAQI
20th Jul 2026603 PMAQI
20th Jul 2026554 PMAQI
20th Jul 2026605 PMAQI
20th Jul 2026576 PMAQI
20th Jul 2026547 PMAQI
20th Jul 2026558 PMAQI
20th Jul 2026549 PMAQI
20th Jul 20265410 PMAQI
20th Jul 20265411 PMAQI
21st Jul 20265512 AMAQI
21st Jul 2026531 AMAQI
21st Jul 2026522 AMAQI
21st Jul 2026513 AMAQI

28°C24/32°C

21st Jul 2026554 AMAQI
21st Jul 2026545 AMAQI
21st Jul 2026536 AMAQI
21st Jul 2026547 AMAQI
21st Jul 2026538 AMAQI
21st Jul 2026549 AMAQI
21st Jul 20265410 AMAQI
21st Jul 20265511 AMAQI
21st Jul 2026561 PMAQI
21st Jul 2026542 PMAQI
21st Jul 2026553 PMAQI
21st Jul 2026544 PMAQI
21st Jul 2026515 PMAQI
21st Jul 2026506 PMAQI
21st Jul 2026887 PMAQI
21st Jul 2026488 PMAQI
21st Jul 2026449 PMAQI
21st Jul 20264410 PMAQI
21st Jul 20264611 PMAQI
22nd Jul 20264212 AMAQI
22nd Jul 2026441 AMAQI
22nd Jul 2026312 AMAQI
22nd Jul 2026313 AMAQI

27°C24/31°C

22nd Jul 2026294 AMAQI
22nd Jul 2026315 AMAQI
22nd Jul 2026316 AMAQI
22nd Jul 2026337 AMAQI
22nd Jul 2026368 AMAQI
22nd Jul 2026429 AMAQI
22nd Jul 20264810 AMAQI
22nd Jul 20265111 AMAQI
22nd Jul 20265512 PMAQI
22nd Jul 2026571 PMAQI
22nd Jul 2026652 PMAQI
22nd Jul 2026673 PMAQI
22nd Jul 2026664 PMAQI
22nd Jul 2026535 PMAQI
22nd Jul 2026426 PMAQI
22nd Jul 2026467 PMAQI
22nd Jul 2026428 PMAQI
22nd Jul 2026369 PMAQI
22nd Jul 20263010 PMAQI
22nd Jul 20263311 PMAQI
23rd Jul 20264012 AMAQI
23rd Jul 2026441 AMAQI
23rd Jul 2026472 AMAQI
23rd Jul 2026473 AMAQI

27°C24/31°C

23rd Jul 2026364 AMAQI
23rd Jul 2026365 AMAQI
23rd Jul 2026346 AMAQI
23rd Jul 2026277 AMAQI
23rd Jul 2026248 AMAQI
23rd Jul 2026229 AMAQI
23rd Jul 20262310 AMAQI
23rd Jul 20261911 AMAQI
23rd Jul 20262112 PMAQI
23rd Jul 2026251 PMAQI
23rd Jul 2026292 PMAQI
23rd Jul 2026313 PMAQI
23rd Jul 2026314 PMAQI
23rd Jul 2026275 PMAQI
23rd Jul 2026246 PMAQI
23rd Jul 2026217 PMAQI
23rd Jul 2026218 PMAQI
23rd Jul 2026209 PMAQI
23rd Jul 20262110 PMAQI
23rd Jul 20262111 PMAQI
24th Jul 20262112 AMAQI
24th Jul 2026201 AMAQI
24th Jul 2026252 AMAQI
24th Jul 2026233 AMAQI

26°C24/30°C

24th Jul 2026234 AMAQI
24th Jul 2026255 AMAQI
24th Jul 2026256 AMAQI
24th Jul 2026297 AMAQI
24th Jul 2026278 AMAQI
24th Jul 2026319 AMAQI
24th Jul 20264010 AMAQI
24th Jul 20263311 AMAQI
24th Jul 20263312 PMAQI
24th Jul 2026331 PMAQI
24th Jul 2026332 PMAQI
24th Jul 2026293 PMAQI
24th Jul 2026314 PMAQI
24th Jul 2026275 PMAQI
24th Jul 2026256 PMAQI
24th Jul 2026297 PMAQI
24th Jul 2026278 PMAQI
24th Jul 2026319 PMAQI
24th Jul 20262910 PMAQI
24th Jul 20263411 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026311 AMAQI
25th Jul 2026332 AMAQI
25th Jul 2026383 AMAQI

25°C23/27°C

25th Jul 2026364 AMAQI
25th Jul 2026365 AMAQI
25th Jul 2026296 AMAQI
25th Jul 2026337 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262510 AMAQI
25th Jul 20262711 AMAQI
25th Jul 20262112 PMAQI
25th Jul 2026211 PMAQI
25th Jul 2026232 PMAQI
25th Jul 2026233 PMAQI
25th Jul 2026214 PMAQI
25th Jul 2026235 PMAQI
25th Jul 2026256 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026258 PMAQI
25th Jul 2026299 PMAQI
25th Jul 20262710 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20263112 AMAQI
26th Jul 2026251 AMAQI
26th Jul 2026272 AMAQI
26th Jul 2026253 AMAQI

25°C22/28°C

26th Jul 2026214 AMAQI
26th Jul 2026215 AMAQI
26th Jul 2026256 AMAQI
26th Jul 2026217 AMAQI
26th Jul 2026258 AMAQI
26th Jul 2026259 AMAQI
26th Jul 20262710 AMAQI
26th Jul 20262711 AMAQI
26th Jul 20262112 PMAQI
26th Jul 2026251 PMAQI
26th Jul 2026212 PMAQI
26th Jul 2026193 PMAQI
26th Jul 2026234 PMAQI
26th Jul 2026235 PMAQI
26th Jul 2026236 PMAQI
26th Jul 2026257 PMAQI
26th Jul 2026218 PMAQI
26th Jul 2026279 PMAQI
26th Jul 20262310 PMAQI
26th Jul 20262111 PMAQI
27th Jul 20262112 AMAQI
27th Jul 2026171 AMAQI
27th Jul 2026192 AMAQI
27th Jul 2026233 AMAQI

23°C22/25°C

27th Jul 2026234 AMAQI
27th Jul 2026235 AMAQI
27th Jul 2026256 AMAQI
27th Jul 2026217 AMAQI
27th Jul 2026238 AMAQI
27th Jul 2026259 AMAQI
27th Jul 20262510 AMAQI
27th Jul 20262111 AMAQI
27th Jul 20262512 PMAQI
27th Jul 2026191 PMAQI
27th Jul 2026212 PMAQI
27th Jul 2026213 PMAQI
27th Jul 2026214 PMAQI
27th Jul 2026215 PMAQI
27th Jul 2026196 PMAQI
27th Jul 2026217 PMAQI
27th Jul 2026178 PMAQI
27th Jul 2026219 PMAQI
27th Jul 20261910 PMAQI
27th Jul 20262311 PMAQI
28th Jul 20261912 AMAQI
28th Jul 2026211 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026253 AMAQI

24°C21/28°C

28th Jul 2026254 AMAQI
28th Jul 2026255 AMAQI
28th Jul 2026256 AMAQI
28th Jul 2026297 AMAQI
28th Jul 2026238 AMAQI
28th Jul 2026259 AMAQI
28th Jul 20262510 AMAQI
28th Jul 20262511 AMAQI
28th Jul 20262112 PMAQI
28th Jul 2026291 PMAQI
28th Jul 2026362 PMAQI
28th Jul 2026333 PMAQI
28th Jul 2026294 PMAQI
28th Jul 2026335 PMAQI
28th Jul 2026256 PMAQI
28th Jul 2026257 PMAQI
28th Jul 2026278 PMAQI
28th Jul 2026259 PMAQI
28th Jul 20262510 PMAQI
28th Jul 20262111 PMAQI
29th Jul 20262512 AMAQI
29th Jul 2026251 AMAQI
29th Jul 2026292 AMAQI
29th Jul 2026293 AMAQI

24°C21/30°C

29th Jul 2026294 AMAQI
29th Jul 2026295 AMAQI
29th Jul 2026256 AMAQI
29th Jul 2026337 AMAQI
29th Jul 2026318 AMAQI
29th Jul 2026299 AMAQI
29th Jul 20262510 AMAQI
29th Jul 20262511 AMAQI
29th Jul 20262512 PMAQI
29th Jul 2026211 PMAQI
29th Jul 2026272 PMAQI
29th Jul 2026233 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026335 PMAQI
29th Jul 2026216 PMAQI
29th Jul 2026257 PMAQI
29th Jul 2026218 PMAQI
29th Jul 2026259 PMAQI
29th Jul 20262110 PMAQI
29th Jul 20262511 PMAQI
30th Jul 20262512 AMAQI
30th Jul 2026211 AMAQI
30th Jul 2026252 AMAQI
30th Jul 2026213 AMAQI

24°C22/25°C

30th Jul 2026234 AMAQI
30th Jul 2026275 AMAQI
30th Jul 2026276 AMAQI
30th Jul 2026297 AMAQI
30th Jul 2026318 AMAQI
30th Jul 2026299 AMAQI
30th Jul 20263810 AMAQI
30th Jul 20263611 AMAQI
30th Jul 20264012 PMAQI
30th Jul 2026421 PMAQI
30th Jul 2026462 PMAQI
30th Jul 2026403 PMAQI
30th Jul 2026464 PMAQI
30th Jul 2026425 PMAQI
30th Jul 2026446 PMAQI
30th Jul 2026447 PMAQI
30th Jul 2026448 PMAQI
30th Jul 2026429 PMAQI
30th Jul 20264410 PMAQI
30th Jul 20264211 PMAQI
31st Jul 20264212 AMAQI
31st Jul 2026421 AMAQI
31st Jul 2026442 AMAQI
31st Jul 2026403 AMAQI

24°C22/28°C

31st Jul 2026404 AMAQI
31st Jul 2026425 AMAQI
31st Jul 2026446 AMAQI
31st Jul 2026467 AMAQI
31st Jul 2026428 AMAQI
31st Jul 2026429 AMAQI
31st Jul 20264010 AMAQI
31st Jul 20264211 AMAQI
31st Jul 20264012 PMAQI
31st Jul 2026381 PMAQI
31st Jul 2026362 PMAQI
31st Jul 2026333 PMAQI
31st Jul 2026314 PMAQI
31st Jul 2026335 PMAQI
31st Jul 2026386 PMAQI
31st Jul 2026337 PMAQI
31st Jul 2026368 PMAQI
31st Jul 2026389 PMAQI
31st Jul 20263610 PMAQI
31st Jul 20264011 PMAQI
1st Aug 20263812 AMAQI
1st Aug 2026401 AMAQI
1st Aug 2026382 AMAQI
1st Aug 2026333 AMAQI

24°C22/27°C

1st Aug 2026334 AMAQI
1st Aug 2026315 AMAQI
1st Aug 2026296 AMAQI
1st Aug 2026317 AMAQI
1st Aug 2026368 AMAQI
1st Aug 2026339 AMAQI
1st Aug 20263310 AMAQI
1st Aug 20263611 AMAQI
1st Aug 20263312 PMAQI
1st Aug 2026381 PMAQI
1st Aug 2026382 PMAQI
1st Aug 2026363 PMAQI
1st Aug 2026404 PMAQI
1st Aug 2026365 PMAQI
1st Aug 2026366 PMAQI
1st Aug 2026387 PMAQI
1st Aug 2026368 PMAQI
1st Aug 2026369 PMAQI
1st Aug 20263610 PMAQI
1st Aug 20263811 PMAQI
2nd Aug 20263812 AMAQI
2nd Aug 2026381 AMAQI
2nd Aug 2026402 AMAQI
2nd Aug 2026363 AMAQI

25°C23/27°C

2nd Aug 2026404 AMAQI
2nd Aug 2026405 AMAQI
2nd Aug 2026426 AMAQI
2nd Aug 2026447 AMAQI
2nd Aug 2026448 AMAQI
2nd Aug 2026429 AMAQI
2nd Aug 20264610 AMAQI
2nd Aug 20264411 AMAQI
2nd Aug 20264612 PMAQI
2nd Aug 2026441 PMAQI
2nd Aug 2026422 PMAQI
2nd Aug 2026383 PMAQI
2nd Aug 2026384 PMAQI
2nd Aug 2026385 PMAQI
2nd Aug 2026346 PMAQI
2nd Aug 2026367 PMAQI
2nd Aug 2026318 PMAQI
2nd Aug 2026319 PMAQI
2nd Aug 20262910 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20262912 AMAQI
3rd Aug 2026271 AMAQI
3rd Aug 2026232 AMAQI
3rd Aug 2026253 AMAQI

26°C23/29°C

3rd Aug 2026254 AMAQI
3rd Aug 2026215 AMAQI
3rd Aug 2026256 AMAQI
3rd Aug 2026387 AMAQI
3rd Aug 2026298 AMAQI
3rd Aug 2026259 AMAQI
3rd Aug 20262510 AMAQI
3rd Aug 20262911 AMAQI
3rd Aug 20263812 PMAQI
3rd Aug 2026331 PMAQI
3rd Aug 2026292 PMAQI
3rd Aug 2026293 PMAQI
3rd Aug 2026294 PMAQI
3rd Aug 2026295 PMAQI
3rd Aug 2026296 PMAQI
3rd Aug 2026297 PMAQI
3rd Aug 2026298 PMAQI
3rd Aug 2026299 PMAQI
3rd Aug 20263310 PMAQI
3rd Aug 20262911 PMAQI
4th Aug 20262512 AMAQI
4th Aug 2026251 AMAQI
4th Aug 2026212 AMAQI
4th Aug 2026253 AMAQI

24°C21/29°C

4th Aug 2026254 AMAQI
4th Aug 2026215 AMAQI
4th Aug 2026256 AMAQI
4th Aug 2026257 AMAQI
4th Aug 2026258 AMAQI
4th Aug 2026259 AMAQI
4th Aug 20262510 AMAQI
4th Aug 20262111 AMAQI
4th Aug 20262512 PMAQI
4th Aug 2026251 PMAQI
4th Aug 2026252 PMAQI
4th Aug 2026253 PMAQI
4th Aug 2026254 PMAQI
4th Aug 2026235 PMAQI
4th Aug 2026296 PMAQI
4th Aug 2026217 PMAQI
4th Aug 2026258 PMAQI
4th Aug 2026259 PMAQI
4th Aug 20262110 PMAQI
4th Aug 20262311 PMAQI
5th Aug 20262512 AMAQI
5th Aug 2026231 AMAQI
5th Aug 2026232 AMAQI
5th Aug 2026233 AMAQI

25°C19/31°C

5th Aug 2026234 AMAQI
5th Aug 2026235 AMAQI
5th Aug 2026236 AMAQI
5th Aug 2026237 AMAQI
5th Aug 2026258 AMAQI
5th Aug 2026259 AMAQI
5th Aug 20262710 AMAQI
5th Aug 20262911 AMAQI
5th Aug 20262712 PMAQI
5th Aug 2026271 PMAQI
5th Aug 2026272 PMAQI
5th Aug 2026273 PMAQI
5th Aug 2026274 PMAQI
5th Aug 2026275 PMAQI
5th Aug 2026296 PMAQI
5th Aug 2026297 PMAQI
5th Aug 2026298 PMAQI
5th Aug 2026299 PMAQI
5th Aug 20262910 PMAQI
5th Aug 20262911 PMAQI
6th Aug 20262712 AMAQI
6th Aug 2026291 AMAQI
6th Aug 2026272 AMAQI
6th Aug 2026293 AMAQI

25°C19/31°C

6th Aug 2026294 AMAQI
6th Aug 2026275 AMAQI
6th Aug 2026276 AMAQI
6th Aug 2026257 AMAQI
6th Aug 2026298 AMAQI
6th Aug 2026279 AMAQI
6th Aug 20262910 AMAQI
6th Aug 20263111 AMAQI
6th Aug 20263112 PMAQI
6th Aug 2026311 PMAQI
6th Aug 2026362 PMAQI
6th Aug 2026343 PMAQI
6th Aug 2026334 PMAQI
6th Aug 2026315 PMAQI
6th Aug 2026336 PMAQI
6th Aug 2026317 PMAQI
6th Aug 2026318 PMAQI
6th Aug 2026339 PMAQI
6th Aug 20263110 PMAQI
6th Aug 20263111 PMAQI
7th Aug 20263112 AMAQI
7th Aug 2026331 AMAQI
7th Aug 2026332 AMAQI
7th Aug 2026313 AMAQI

27°C22/33°C

7th Aug 2026314 AMAQI
7th Aug 2026315 AMAQI
7th Aug 2026316 AMAQI
7th Aug 2026337 AMAQI
7th Aug 2026298 AMAQI
7th Aug 2026319 AMAQI
7th Aug 20262910 AMAQI
7th Aug 20262911 AMAQI
7th Aug 20264212 PMAQI
7th Aug 2026461 PMAQI
7th Aug 2026312 PMAQI
7th Aug 2026363 PMAQI
7th Aug 2026334 PMAQI
7th Aug 2026365 PMAQI
7th Aug 2026336 PMAQI
7th Aug 2026367 PMAQI
7th Aug 2026368 PMAQI
7th Aug 2026339 PMAQI
7th Aug 20263610 PMAQI
7th Aug 20264011 PMAQI
8th Aug 20264012 AMAQI
8th Aug 2026361 AMAQI
8th Aug 2026402 AMAQI
8th Aug 2026363 AMAQI

28°C23/33°C

8th Aug 2026364 AMAQI
8th Aug 2026365 AMAQI
8th Aug 2026336 AMAQI
8th Aug 2026407 AMAQI
8th Aug 2026298 AMAQI
8th Aug 2026409 AMAQI
8th Aug 20264410 AMAQI
8th Aug 20264411 AMAQI
8th Aug 20264812 PMAQI
8th Aug 2026481 PMAQI
8th Aug 2026502 PMAQI
8th Aug 2026403 PMAQI
8th Aug 2026404 PMAQI
8th Aug 2026405 PMAQI
8th Aug 2026296 PMAQI
8th Aug 2026297 PMAQI
8th Aug 2026368 PMAQI
8th Aug 2026369 PMAQI
8th Aug 20262910 PMAQI
8th Aug 20262311 PMAQI
9th Aug 20262112 AMAQI
9th Aug 2026271 AMAQI
9th Aug 2026232 AMAQI
9th Aug 2026233 AMAQI

27°C23/31°C

9th Aug 2026234 AMAQI
9th Aug 2026235 AMAQI
9th Aug 2026336 AMAQI
9th Aug 2026277 AMAQI
9th Aug 2026238 AMAQI
9th Aug 2026239 AMAQI
9th Aug 20262310 AMAQI
9th Aug 20262111 AMAQI
9th Aug 20262312 PMAQI
9th Aug 2026251 PMAQI
9th Aug 2026252 PMAQI
9th Aug 2026213 PMAQI
9th Aug 2026214 PMAQI
9th Aug 2026215 PMAQI
9th Aug 2026216 PMAQI
9th Aug 2026217 PMAQI
9th Aug 2026238 PMAQI
9th Aug 2026239 PMAQI
9th Aug 20262310 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20262112 AMAQI
10th Aug 2026251 AMAQI
10th Aug 2026212 AMAQI
10th Aug 2026253 AMAQI

25°C23/27°C

10th Aug 2026234 AMAQI
10th Aug 2026255 AMAQI
10th Aug 2026256 AMAQI
10th Aug 2026237 AMAQI
10th Aug 2026258 AMAQI
10th Aug 2026259 AMAQI
10th Aug 20262510 AMAQI
10th Aug 20262511 AMAQI
10th Aug 20262112 PMAQI
10th Aug 2026231 PMAQI
10th Aug 2026232 PMAQI
10th Aug 2026253 PMAQI
10th Aug 2026254 PMAQI
10th Aug 2026255 PMAQI
10th Aug 2026256 PMAQI
10th Aug 2026237 PMAQI
10th Aug 2026218 PMAQI
10th Aug 2026239 PMAQI
10th Aug 20262110 PMAQI
10th Aug 20262311 PMAQI
11th Aug 20262312 AMAQI
11th Aug 2026231 AMAQI
11th Aug 2026252 AMAQI
11th Aug 2026293 AMAQI

25°C21/28°C

11th Aug 2026254 AMAQI
11th Aug 2026255 AMAQI
11th Aug 2026236 AMAQI
11th Aug 2026237 AMAQI
11th Aug 2026258 AMAQI
11th Aug 2026259 AMAQI
11th Aug 20262510 AMAQI
11th Aug 20262711 AMAQI
11th Aug 20262112 PMAQI
11th Aug 2026231 PMAQI
11th Aug 2026232 PMAQI
11th Aug 2026253 PMAQI
11th Aug 2026234 PMAQI
11th Aug 2026235 PMAQI
11th Aug 2026256 PMAQI
11th Aug 2026277 PMAQI
11th Aug 2026298 PMAQI
11th Aug 2026279 PMAQI
11th Aug 20262510 PMAQI
11th Aug 20262911 PMAQI
12th Aug 20263312 AMAQI
12th Aug 2026291 AMAQI
12th Aug 2026292 AMAQI
12th Aug 2026293 AMAQI

23°C20/26°C

12th Aug 2026254 AMAQI
12th Aug 2026255 AMAQI
12th Aug 2026256 AMAQI
12th Aug 2026257 AMAQI
12th Aug 2026278 AMAQI
12th Aug 2026299 AMAQI
12th Aug 20262510 AMAQI
12th Aug 20262311 AMAQI
12th Aug 20262712 PMAQI
12th Aug 2026271 PMAQI
12th Aug 2026232 PMAQI
12th Aug 2026253 PMAQI
12th Aug 2026254 PMAQI
12th Aug 2026235 PMAQI
12th Aug 2026256 PMAQI
12th Aug 2026277 PMAQI
12th Aug 2026258 PMAQI
12th Aug 2026259 PMAQI
12th Aug 20262910 PMAQI
12th Aug 20262511 PMAQI
13th Aug 20262512 AMAQI
13th Aug 2026251 AMAQI
13th Aug 2026232 AMAQI
13th Aug 2026233 AMAQI

25°C22/29°C

13th Aug 2026254 AMAQI
13th Aug 2026255 AMAQI
13th Aug 2026216 AMAQI
13th Aug 2026257 AMAQI
13th Aug 2026238 AMAQI
13th Aug 2026239 AMAQI
13th Aug 20262510 AMAQI
13th Aug 20262311 AMAQI
13th Aug 20262312 PMAQI
13th Aug 2026231 PMAQI
13th Aug 2026212 PMAQI
13th Aug 2026233 PMAQI
13th Aug 2026234 PMAQI
13th Aug 2026235 PMAQI
13th Aug 2026196 PMAQI
13th Aug 2026197 PMAQI
13th Aug 2026198 PMAQI
13th Aug 2026199 PMAQI
13th Aug 20262110 PMAQI
13th Aug 20261911 PMAQI
14th Aug 20261912 AMAQI
14th Aug 2026171 AMAQI
14th Aug 2026142 AMAQI
14th Aug 2026143 AMAQI

27°C22/34°C

14th Aug 2026144 AMAQI
14th Aug 2026195 AMAQI
14th Aug 2026196 AMAQI
14th Aug 2026177 AMAQI
14th Aug 2026178 AMAQI
14th Aug 2026149 AMAQI
14th Aug 20261710 AMAQI
14th Aug 20261411 AMAQI
14th Aug 20261712 PMAQI
14th Aug 2026171 PMAQI
14th Aug 2026172 PMAQI
14th Aug 2026173 PMAQI
14th Aug 2026144 PMAQI
14th Aug 2026195 PMAQI
14th Aug 2026196 PMAQI
14th Aug 2026177 PMAQI
14th Aug 2026198 PMAQI
14th Aug 2026199 PMAQI
14th Aug 20261910 PMAQI
14th Aug 20261711 PMAQI
15th Aug 20261912 AMAQI
15th Aug 2026211 AMAQI
15th Aug 2026232 AMAQI
15th Aug 2026233 AMAQI

27°C22/33°C

15th Aug 2026234 AMAQI
4 AM
15th Aug 2026235 AMAQI
15th Aug 2026256 AMAQI
15th Aug 2026197 AMAQI
15th Aug 2026218 AMAQI
15th Aug 2026259 AMAQI
15th Aug 20262510 AMAQI
15th Aug 20262311 AMAQI
11 AM
15th Aug 20262312 PMAQI
15th Aug 2026211 PMAQI
15th Aug 2026212 PMAQI
15th Aug 2026233 PMAQI
15th Aug 2026254 PMAQI
15th Aug 2026255 PMAQI
15th Aug 2026276 PMAQI
6 PM
15th Aug 2026277 PMAQI
15th Aug 2026298 PMAQI
15th Aug 2026259 PMAQI
15th Aug 20262910 PMAQI
15th Aug 20262511 PMAQI
11 PM
3 AM

26°C22/32°C

Day time
Avg. Highest Time
2 PM

32AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
4 AM

28AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 2 PM (Avg. 32), while the lowest AQI was between 4 AM to 4 AM (Avg. 28).
Night time
Avg. Highest Time
7 PM

31AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
12 AM - 3 AM

29AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 7 PM (Avg. 31), while the lowest AQI was between 12 AM to 3 AM (Avg. 29).

2026 Days Vs Air Quality

Niigata Prefecture, Tsubame, Niigata, Japan

2026

87%

198

13%

29

Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)

Good
198 Days
Moderate
29 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 87%

Health Risk Level:

Low

In 2026, 87% of 227 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

Niigata Prefecture, Tsubame, Niigata, 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
14AQI (US)
2nd January 2026
15AQI (US)
3rd January 2026
13AQI (US)
4th January 2026
22AQI (US)
5th January 2026
14AQI (US)
6th January 2026
22AQI (US)
7th January 2026
20AQI (US)
8th January 2026
18AQI (US)
9th January 2026
16AQI (US)
10th January 2026
21AQI (US)
11th January 2026
28AQI (US)
12th January 2026
18AQI (US)
13th January 2026
16AQI (US)
14th January 2026
16AQI (US)
15th January 2026
22AQI (US)
16th January 2026
39AQI (US)
17th January 2026
45AQI (US)
18th January 2026
32AQI (US)
19th January 2026
45AQI (US)
20th January 2026
19AQI (US)
21st January 2026
15AQI (US)
22nd January 2026
21AQI (US)
23rd January 2026
31AQI (US)
24th January 2026
31AQI (US)
25th January 2026
40AQI (US)
26th January 2026
24AQI (US)
27th January 2026
34AQI (US)
28th January 2026
32AQI (US)
29th January 2026
22AQI (US)
30th January 2026
38AQI (US)
31st January 2026
42AQI (US)
1st February 2026
31AQI (US)
2nd February 2026
33AQI (US)
3rd February 2026
30AQI (US)
4th February 2026
36AQI (US)
5th February 2026
45AQI (US)
6th February 2026
42AQI (US)
7th February 2026
27AQI (US)
8th February 2026
27AQI (US)
9th February 2026
40AQI (US)
10th February 2026
46AQI (US)
11th February 2026
53AQI (US)
12th February 2026
35AQI (US)
13th February 2026
37AQI (US)
14th February 2026
64AQI (US)
15th February 2026
50AQI (US)
16th February 2026
37AQI (US)
17th February 2026
15AQI (US)
18th February 2026
30AQI (US)
19th February 2026
26AQI (US)
20th February 2026
32AQI (US)
21st February 2026
44AQI (US)
22nd February 2026
42AQI (US)
23rd February 2026
43AQI (US)
24th February 2026
32AQI (US)
25th February 2026
35AQI (US)
26th February 2026
34AQI (US)
27th February 2026
41AQI (US)
28th February 2026
34AQI (US)
1st March 2026
37AQI (US)
2nd March 2026
65AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
61AQI (US)
5th March 2026
60AQI (US)
6th March 2026
53AQI (US)
7th March 2026
44AQI (US)
8th March 2026
46AQI (US)
9th March 2026
44AQI (US)
10th March 2026
55AQI (US)
11th March 2026
53AQI (US)
12th March 2026
61AQI (US)
13th March 2026
35AQI (US)
14th March 2026
48AQI (US)
15th March 2026
58AQI (US)
16th March 2026
54AQI (US)
17th March 2026
61AQI (US)
18th March 2026
54AQI (US)
19th March 2026
34AQI (US)
20th March 2026
38AQI (US)
21st March 2026
57AQI (US)
22nd March 2026
42AQI (US)
23rd March 2026
47AQI (US)
24th March 2026
66AQI (US)
25th March 2026
54AQI (US)
26th March 2026
22AQI (US)
27th March 2026
24AQI (US)
28th March 2026
53AQI (US)
29th March 2026
50AQI (US)
30th March 2026
63AQI (US)
31st March 2026
47AQI (US)
1st April 2026
31AQI (US)
2nd April 2026
18AQI (US)
3rd April 2026
48AQI (US)
4th April 2026
48AQI (US)
5th April 2026
36AQI (US)
6th April 2026
23AQI (US)
7th April 2026
26AQI (US)
8th April 2026
24AQI (US)
9th April 2026
32AQI (US)
10th April 2026
44AQI (US)
11th April 2026
37AQI (US)
12th April 2026
26AQI (US)
13th April 2026
28AQI (US)
14th April 2026
35AQI (US)
15th April 2026
40AQI (US)
16th April 2026
31AQI (US)
17th April 2026
33AQI (US)
18th April 2026
33AQI (US)
19th April 2026
33AQI (US)
20th April 2026
33AQI (US)
21st April 2026
40AQI (US)
22nd April 2026
29AQI (US)
23rd April 2026
29AQI (US)
24th April 2026
30AQI (US)
25th April 2026
43AQI (US)
26th April 2026
46AQI (US)
27th April 2026
47AQI (US)
28th April 2026
37AQI (US)
29th April 2026
32AQI (US)
30th April 2026
37AQI (US)
1st May 2026
47AQI (US)
2nd May 2026
54AQI (US)
3rd May 2026
40AQI (US)
4th May 2026
27AQI (US)
5th May 2026
23AQI (US)
6th May 2026
29AQI (US)
7th May 2026
28AQI (US)
8th May 2026
27AQI (US)
9th May 2026
29AQI (US)
10th May 2026
27AQI (US)
11th May 2026
28AQI (US)
12th May 2026
34AQI (US)
13th May 2026
38AQI (US)
14th May 2026
29AQI (US)
15th May 2026
34AQI (US)
16th May 2026
83AQI (US)
17th May 2026
66AQI (US)
18th May 2026
53AQI (US)
19th May 2026
48AQI (US)
20th May 2026
61AQI (US)
21st May 2026
62AQI (US)
22nd May 2026
65AQI (US)
23rd May 2026
56AQI (US)
24th May 2026
61AQI (US)
25th May 2026
52AQI (US)
26th May 2026
41AQI (US)
27th May 2026
28AQI (US)
28th May 2026
26AQI (US)
29th May 2026
23AQI (US)
30th May 2026
22AQI (US)
31st May 2026
26AQI (US)
1st June 2026
27AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
25AQI (US)
4th June 2026
19AQI (US)
5th June 2026
20AQI (US)
6th June 2026
21AQI (US)
7th June 2026
22AQI (US)
8th June 2026
20AQI (US)
9th June 2026
23AQI (US)
10th June 2026
21AQI (US)
11th June 2026
22AQI (US)
12th June 2026
23AQI (US)
13th June 2026
25AQI (US)
14th June 2026
22AQI (US)
15th June 2026
22AQI (US)
16th June 2026
26AQI (US)
17th June 2026
25AQI (US)
18th June 2026
26AQI (US)
19th June 2026
26AQI (US)
20th June 2026
22AQI (US)
21st June 2026
19AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
19AQI (US)
24th June 2026
20AQI (US)
25th June 2026
26AQI (US)
26th June 2026
27AQI (US)
27th June 2026
26AQI (US)
28th June 2026
27AQI (US)
29th June 2026
24AQI (US)
30th June 2026
22AQI (US)
1st July 2026
23AQI (US)
2nd July 2026
22AQI (US)
3rd July 2026
19AQI (US)
4th July 2026
24AQI (US)
5th July 2026
22AQI (US)
6th July 2026
19AQI (US)
7th July 2026
24AQI (US)
8th July 2026
24AQI (US)
9th July 2026
25AQI (US)
10th July 2026
28AQI (US)
11th July 2026
29AQI (US)
12th July 2026
28AQI (US)
13th July 2026
29AQI (US)
14th July 2026
35AQI (US)
15th July 2026
26AQI (US)
16th July 2026
27AQI (US)
17th July 2026
26AQI (US)
18th July 2026
24AQI (US)
19th July 2026
25AQI (US)
20th July 2026
49AQI (US)
21st July 2026
54AQI (US)
22nd July 2026
43AQI (US)
23rd July 2026
29AQI (US)
24th July 2026
28AQI (US)
25th July 2026
28AQI (US)
26th July 2026
24AQI (US)
27th July 2026
21AQI (US)
28th July 2026
26AQI (US)
29th July 2026
26AQI (US)
30th July 2026
35AQI (US)
31st July 2026
39AQI (US)
1st August 2026
36AQI (US)
2nd August 2026
39AQI (US)
3rd August 2026
29AQI (US)
4th August 2026
24AQI (US)
5th August 2026
26AQI (US)
6th August 2026
30AQI (US)
7th August 2026
34AQI (US)
8th August 2026
38AQI (US)
9th August 2026
23AQI (US)
10th August 2026
24AQI (US)
11th August 2026
25AQI (US)
12th August 2026
26AQI (US)
13th August 2026
22AQI (US)
14th August 2026
17AQI (US)
15th August 2026
24AQI (US)
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

25AQI (US)

37AQI (US)

49AQI (US)

34AQI (US)

41AQI (US)

23AQI (US)

28AQI (US)

28AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202634AQI (US)

31
26
2
15
16
30
21
10
30
30
1
15
198
29

Highest AQI (US) recorded in

March

49AQI (US)

Lowest AQI (US) recorded in

June

23AQI (US)

202538AQI (US)

31
27
1
24
7
28
2
26
5
24
6
23
8
28
3
30
25
6
27
3
28
3
321
44

Highest AQI (US) recorded in

July

46AQI (US)

Lowest AQI (US) recorded in

September

29AQI (US)

202335AQI (US)

31
27
1
25
6
24
6
26
5
26
4
25
6
31
30
31
27
2
31
334
30

Highest AQI (US) recorded in

April

45AQI (US)

Lowest AQI (US) recorded in

October

28AQI (US)

202234AQI (US)

31
21
27
4
15
2
23
8
25
5
21
2
29
30
1
27
3
31
282
23

Highest AQI (US) recorded in

May

44AQI (US)

Lowest AQI (US) recorded in

December

26AQI (US)

202130AQI (US)

30
1
26
2
27
2
19
2
29
2
23
7
31
29
2
30
31
30
19
324
18

Highest AQI (US) recorded in

June

41AQI (US)

Lowest AQI (US) recorded in

January

23AQI (US)

202025AQI (US)

13
21
17
1
28
2
28
1
21
8
2
19
30
1
28
2
31
236
15
2

Highest AQI (US) recorded in

August

44AQI (US)

Lowest AQI (US) recorded in

December

15AQI (US)

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
38AQI (US)
Least Polluted Year Recorded
2020(Avg.)
25AQI (US)

Niigata Prefecture's annual 2026 AQI (US) (34) shows an average percentage change of 7.1% (worsened AQI (US)) compared to previous years: 2020 (25), 2021 (30), 2022 (34), 2023 (35), 2025 (38).