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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Seto, Aichi, 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+

September Air Quality Analysis

Seto, Aichi, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
11th Sep 2022
57AQI
Lowest AQI recorded on
6th Sep 2022
11AQI

Same Day Analysis (28th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 25 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 27th Sep - 28th Sep 2026

Seto, Aichi, Japan

AQI
Day
Night
.

5 AM27th Sep 2026

6 PM

4 AM28th Sep 2026

Day time
Avg. Highest Time
5PM27th Sep

38AQI

Avg. Lowest Time
9AM27th Sep

21AQI

Night time
Avg. Highest Time
6PM27th Sep

50AQI

Avg. Lowest Time
1AM28th Sep

23AQI

In the last 24 hours,

Seto's AQI reached its highest point of 50 at 6 PM during the Night, while the lowest point, 21, was recorded at 9 AM during the Day between 27th Sep and 28th Sep 2026.

Day & Night AQI Trend : Aug - Sep 2026

Seto, Aichi, Japan

AugSep
30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th
Day
Night
30th Aug 2026335 AMAQI
30th Aug 2026336 AMAQI
30th Aug 2026317 AMAQI
30th Aug 2026338 AMAQI
30th Aug 2026339 AMAQI
30th Aug 20263810 AMAQI
30th Aug 20264411 AMAQI
30th Aug 20263812 PMAQI
30th Aug 2026401 PMAQI
30th Aug 2026382 PMAQI
30th Aug 2026363 PMAQI
30th Aug 2026384 PMAQI
30th Aug 2026315 PMAQI
30th Aug 2026336 PMAQI
30th Aug 2026347 PMAQI
30th Aug 2026298 PMAQI
30th Aug 2026259 PMAQI
30th Aug 20264010 PMAQI
30th Aug 20264011 PMAQI
31st Aug 20263212 AMAQI
31st Aug 2026211 AMAQI
31st Aug 2026292 AMAQI
31st Aug 2026253 AMAQI
31st Aug 2026234 AMAQI

27°C24/30°C

31st Aug 2026255 AMAQI
31st Aug 2026236 AMAQI
31st Aug 2026237 AMAQI
31st Aug 2026218 AMAQI
31st Aug 2026259 AMAQI
31st Aug 20262110 AMAQI
31st Aug 20262711 AMAQI
31st Aug 20263812 PMAQI
31st Aug 2026381 PMAQI
31st Aug 2026402 PMAQI
31st Aug 2026363 PMAQI
31st Aug 2026424 PMAQI
31st Aug 2026495 PMAQI
31st Aug 2026496 PMAQI
31st Aug 2026447 PMAQI
31st Aug 2026408 PMAQI
31st Aug 2026469 PMAQI
31st Aug 20264410 PMAQI
31st Aug 20264011 PMAQI
1st Sep 20263612 AMAQI
1st Sep 2026401 AMAQI
1st Sep 2026382 AMAQI
1st Sep 2026253 AMAQI
1st Sep 2026314 AMAQI

28°C25/31°C

1st Sep 2026365 AMAQI
1st Sep 2026366 AMAQI
1st Sep 2026317 AMAQI
1st Sep 2026338 AMAQI
1st Sep 2026409 AMAQI
1st Sep 20264010 AMAQI
1st Sep 20264011 AMAQI
1st Sep 20264612 PMAQI
1st Sep 2026461 PMAQI
1st Sep 2026482 PMAQI
1st Sep 2026463 PMAQI
1st Sep 2026424 PMAQI
1st Sep 2026385 PMAQI
1st Sep 2026386 PMAQI
1st Sep 2026387 PMAQI
1st Sep 2026298 PMAQI
1st Sep 2026259 PMAQI
1st Sep 20262510 PMAQI
1st Sep 20262511 PMAQI
2nd Sep 20262112 AMAQI
2nd Sep 2026271 AMAQI
2nd Sep 2026232 AMAQI
2nd Sep 2026273 AMAQI
2nd Sep 2026214 AMAQI

26°C24/30°C

2nd Sep 2026215 AMAQI
2nd Sep 2026256 AMAQI
2nd Sep 2026277 AMAQI
2nd Sep 2026298 AMAQI
2nd Sep 2026299 AMAQI
2nd Sep 20262110 AMAQI
2nd Sep 20262711 AMAQI
2nd Sep 20263612 PMAQI
2nd Sep 2026291 PMAQI
2nd Sep 2026232 PMAQI
2nd Sep 2026253 PMAQI
2nd Sep 2026294 PMAQI
2nd Sep 2026275 PMAQI
2nd Sep 2026296 PMAQI
2nd Sep 2026217 PMAQI
2nd Sep 2026258 PMAQI
2nd Sep 2026259 PMAQI
2nd Sep 20262310 PMAQI
2nd Sep 20262111 PMAQI
3rd Sep 20262312 AMAQI
3rd Sep 2026211 AMAQI
3rd Sep 2026212 AMAQI
3rd Sep 2026293 AMAQI
3rd Sep 2026254 AMAQI

28°C25/33°C

3rd Sep 2026215 AMAQI
3rd Sep 2026236 AMAQI
3rd Sep 2026237 AMAQI
3rd Sep 2026218 AMAQI
3rd Sep 2026239 AMAQI
3rd Sep 20262510 AMAQI
3rd Sep 20262711 AMAQI
3rd Sep 20262512 PMAQI
3rd Sep 2026251 PMAQI
3rd Sep 2026232 PMAQI
3rd Sep 2026253 PMAQI
3rd Sep 2026254 PMAQI
3rd Sep 2026255 PMAQI
3rd Sep 2026256 PMAQI
3rd Sep 2026217 PMAQI
3rd Sep 2026218 PMAQI
3rd Sep 2026219 PMAQI
3rd Sep 20262710 PMAQI
3rd Sep 20262711 PMAQI
4th Sep 20262312 AMAQI
4th Sep 2026251 AMAQI
4th Sep 2026252 AMAQI
4th Sep 2026213 AMAQI
4th Sep 2026214 AMAQI

25°C22/27°C

4th Sep 2026215 AMAQI
4th Sep 2026236 AMAQI
4th Sep 2026257 AMAQI
4th Sep 2026258 AMAQI
4th Sep 2026219 AMAQI
4th Sep 20262910 AMAQI
4th Sep 20262511 AMAQI
4th Sep 20262312 PMAQI
4th Sep 2026251 PMAQI
4th Sep 2026252 PMAQI
4th Sep 2026213 PMAQI
4th Sep 2026234 PMAQI
4th Sep 2026215 PMAQI
4th Sep 2026256 PMAQI
4th Sep 2026257 PMAQI
4th Sep 2026298 PMAQI
4th Sep 2026299 PMAQI
4th Sep 20262910 PMAQI
4th Sep 20262511 PMAQI
5th Sep 20262512 AMAQI
5th Sep 2026251 AMAQI
5th Sep 2026252 AMAQI
5th Sep 2026253 AMAQI
5th Sep 2026234 AMAQI

22°C20/23°C

5th Sep 2026255 AMAQI
5th Sep 2026256 AMAQI
5th Sep 2026217 AMAQI
5th Sep 2026238 AMAQI
5th Sep 2026259 AMAQI
5th Sep 20262510 AMAQI
5th Sep 20262511 AMAQI
5th Sep 20262512 PMAQI
5th Sep 2026211 PMAQI
5th Sep 2026212 PMAQI
5th Sep 2026253 PMAQI
5th Sep 2026214 PMAQI
5th Sep 2026235 PMAQI
5th Sep 2026216 PMAQI
5th Sep 2026297 PMAQI
5th Sep 2026218 PMAQI
5th Sep 2026259 PMAQI
5th Sep 20262510 PMAQI
5th Sep 20262311 PMAQI
6th Sep 20262512 AMAQI
6th Sep 2026251 AMAQI
6th Sep 2026252 AMAQI
6th Sep 2026253 AMAQI
6th Sep 2026254 AMAQI

22°C21/25°C

6th Sep 2026255 AMAQI
6th Sep 2026256 AMAQI
6th Sep 2026297 AMAQI
6th Sep 2026258 AMAQI
6th Sep 2026219 AMAQI
6th Sep 20262310 AMAQI
6th Sep 20262111 AMAQI
6th Sep 20262112 PMAQI
6th Sep 2026231 PMAQI
6th Sep 2026212 PMAQI
6th Sep 2026213 PMAQI
6th Sep 2026254 PMAQI
6th Sep 2026345 PMAQI
6th Sep 2026256 PMAQI
6th Sep 2026297 PMAQI
6th Sep 2026258 PMAQI
6th Sep 2026259 PMAQI
6th Sep 20262510 PMAQI
6th Sep 20262511 PMAQI
7th Sep 20262512 AMAQI
7th Sep 2026251 AMAQI
7th Sep 2026252 AMAQI
7th Sep 2026253 AMAQI
7th Sep 2026254 AMAQI

22°C19/26°C

7th Sep 2026255 AMAQI
7th Sep 2026256 AMAQI
7th Sep 2026237 AMAQI
7th Sep 2026238 AMAQI
7th Sep 2026259 AMAQI
7th Sep 20262310 AMAQI
7th Sep 20262111 AMAQI
7th Sep 20262512 PMAQI
7th Sep 2026251 PMAQI
7th Sep 2026252 PMAQI
7th Sep 2026253 PMAQI
7th Sep 2026254 PMAQI
7th Sep 2026255 PMAQI
7th Sep 2026216 PMAQI
7th Sep 2026217 PMAQI
7th Sep 2026258 PMAQI
7th Sep 2026219 PMAQI
7th Sep 20262510 PMAQI
7th Sep 20262511 PMAQI
8th Sep 20262112 AMAQI
8th Sep 2026251 AMAQI
8th Sep 2026252 AMAQI
8th Sep 2026213 AMAQI
8th Sep 2026254 AMAQI

21°C20/23°C

8th Sep 2026255 AMAQI
8th Sep 2026296 AMAQI
8th Sep 2026237 AMAQI
8th Sep 2026258 AMAQI
8th Sep 2026259 AMAQI
8th Sep 20262110 AMAQI
8th Sep 20262111 AMAQI
8th Sep 20262112 PMAQI
8th Sep 2026211 PMAQI
8th Sep 2026272 PMAQI
8th Sep 2026293 PMAQI
8th Sep 2026294 PMAQI
8th Sep 2026275 PMAQI
8th Sep 2026276 PMAQI
8th Sep 2026237 PMAQI
8th Sep 2026258 PMAQI
8th Sep 2026279 PMAQI
8th Sep 20263310 PMAQI
8th Sep 20262311 PMAQI
9th Sep 20262312 AMAQI
9th Sep 2026211 AMAQI
9th Sep 2026232 AMAQI
9th Sep 2026253 AMAQI
9th Sep 2026254 AMAQI

25°C22/27°C

9th Sep 2026295 AMAQI
9th Sep 2026256 AMAQI
9th Sep 2026257 AMAQI
9th Sep 2026278 AMAQI
9th Sep 2026259 AMAQI
9th Sep 20262510 AMAQI
9th Sep 20262511 AMAQI
9th Sep 20263112 PMAQI
9th Sep 2026291 PMAQI
9th Sep 2026292 PMAQI
9th Sep 2026333 PMAQI
9th Sep 2026384 PMAQI
9th Sep 2026305 PMAQI
9th Sep 2026406 PMAQI
9th Sep 2026387 PMAQI
9th Sep 2026348 PMAQI
9th Sep 2026259 PMAQI
9th Sep 20262910 PMAQI
9th Sep 20262511 PMAQI
10th Sep 20263112 AMAQI
10th Sep 2026231 AMAQI
10th Sep 2026272 AMAQI
10th Sep 2026253 AMAQI
10th Sep 2026274 AMAQI

24°C20/28°C

10th Sep 2026255 AMAQI
10th Sep 2026256 AMAQI
10th Sep 2026257 AMAQI
10th Sep 2026258 AMAQI
10th Sep 2026259 AMAQI
10th Sep 20262310 AMAQI
10th Sep 20262111 AMAQI
10th Sep 20261912 PMAQI
10th Sep 2026231 PMAQI
10th Sep 2026192 PMAQI
10th Sep 2026173 PMAQI
10th Sep 2026174 PMAQI
10th Sep 2026175 PMAQI
10th Sep 2026256 PMAQI
10th Sep 2026237 PMAQI
10th Sep 2026278 PMAQI
10th Sep 2026299 PMAQI
10th Sep 20262910 PMAQI
10th Sep 20263111 PMAQI
11th Sep 20263112 AMAQI
11th Sep 2026211 AMAQI
11th Sep 2026272 AMAQI
11th Sep 2026253 AMAQI
11th Sep 2026254 AMAQI

20°C20/21°C

11th Sep 2026235 AMAQI
11th Sep 2026216 AMAQI
11th Sep 2026257 AMAQI
11th Sep 2026258 AMAQI
11th Sep 2026259 AMAQI
11th Sep 20262510 AMAQI
11th Sep 20262111 AMAQI
11th Sep 20262912 PMAQI
11th Sep 2026231 PMAQI
11th Sep 2026212 PMAQI
11th Sep 2026213 PMAQI
11th Sep 2026214 PMAQI
11th Sep 2026215 PMAQI
11th Sep 2026256 PMAQI
11th Sep 2026257 PMAQI
11th Sep 2026278 PMAQI
11th Sep 2026299 PMAQI
11th Sep 20262710 PMAQI
11th Sep 20263111 PMAQI
12th Sep 20262112 AMAQI
12th Sep 2026301 AMAQI
12th Sep 2026292 AMAQI
12th Sep 2026273 AMAQI
12th Sep 2026294 AMAQI

22°C21/23°C

12th Sep 2026295 AMAQI
12th Sep 2026296 AMAQI
12th Sep 2026407 AMAQI
12th Sep 2026548 AMAQI
12th Sep 2026349 AMAQI
12th Sep 20262510 AMAQI
12th Sep 20263111 AMAQI
12th Sep 20263312 PMAQI
12th Sep 2026421 PMAQI
12th Sep 2026212 PMAQI
12th Sep 2026553 PMAQI
12th Sep 2026514 PMAQI
12th Sep 2026515 PMAQI
12th Sep 2026426 PMAQI
12th Sep 2026297 PMAQI
12th Sep 2026218 PMAQI
12th Sep 2026239 PMAQI
12th Sep 20262910 PMAQI
12th Sep 20262511 PMAQI
13th Sep 20262312 AMAQI
13th Sep 2026251 AMAQI
13th Sep 2026252 AMAQI
13th Sep 2026273 AMAQI
13th Sep 2026254 AMAQI

24°C23/26°C

13th Sep 2026216 AMAQI
13th Sep 2026217 AMAQI
13th Sep 2026218 AMAQI
13th Sep 2026219 AMAQI
13th Sep 20262310 AMAQI
13th Sep 20262511 AMAQI
13th Sep 20262512 PMAQI
13th Sep 2026251 PMAQI
13th Sep 2026212 PMAQI
13th Sep 2026253 PMAQI
13th Sep 2026254 PMAQI
13th Sep 2026295 PMAQI
13th Sep 2026216 PMAQI
13th Sep 2026257 PMAQI
13th Sep 2026218 PMAQI
13th Sep 2026259 PMAQI
13th Sep 20262510 PMAQI
13th Sep 20262311 PMAQI
14th Sep 20262512 AMAQI
14th Sep 2026211 AMAQI
14th Sep 2026252 AMAQI
14th Sep 2026253 AMAQI
14th Sep 2026254 AMAQI

25°C23/28°C

14th Sep 2026255 AMAQI
14th Sep 2026296 AMAQI
14th Sep 2026297 AMAQI
14th Sep 2026258 AMAQI
14th Sep 2026259 AMAQI
14th Sep 20262510 AMAQI
14th Sep 20262511 AMAQI
14th Sep 20262112 PMAQI
14th Sep 2026251 PMAQI
14th Sep 2026292 PMAQI
14th Sep 2026253 PMAQI
14th Sep 2026254 PMAQI
14th Sep 2026255 PMAQI
14th Sep 2026216 PMAQI
14th Sep 2026257 PMAQI
14th Sep 2026278 PMAQI
14th Sep 2026259 PMAQI
14th Sep 20262510 PMAQI
14th Sep 20262511 PMAQI
15th Sep 20262112 AMAQI
15th Sep 2026211 AMAQI
15th Sep 2026252 AMAQI
15th Sep 2026213 AMAQI
15th Sep 2026234 AMAQI

26°C24/29°C

15th Sep 2026255 AMAQI
15th Sep 2026216 AMAQI
15th Sep 2026217 AMAQI
15th Sep 2026298 AMAQI
15th Sep 2026259 AMAQI
15th Sep 20262510 AMAQI
15th Sep 20262511 AMAQI
15th Sep 20262912 PMAQI
15th Sep 2026211 PMAQI
15th Sep 2026252 PMAQI
15th Sep 2026293 PMAQI
15th Sep 2026254 PMAQI
15th Sep 2026215 PMAQI
15th Sep 2026426 PMAQI
15th Sep 2026297 PMAQI
15th Sep 2026338 PMAQI
15th Sep 2026339 PMAQI
15th Sep 20262510 PMAQI
15th Sep 20262511 PMAQI
16th Sep 20262112 AMAQI
16th Sep 2026251 AMAQI
16th Sep 2026252 AMAQI
16th Sep 2026253 AMAQI
16th Sep 2026214 AMAQI

23°C22/24°C

16th Sep 2026215 AMAQI
16th Sep 2026216 AMAQI
16th Sep 2026257 AMAQI
16th Sep 2026258 AMAQI
16th Sep 2026219 AMAQI
16th Sep 20262110 AMAQI
16th Sep 20262511 AMAQI
16th Sep 20262512 PMAQI
16th Sep 2026251 PMAQI
16th Sep 2026252 PMAQI
16th Sep 2026253 PMAQI
16th Sep 2026274 PMAQI
16th Sep 2026255 PMAQI
16th Sep 2026236 PMAQI
16th Sep 2026217 PMAQI
16th Sep 2026258 PMAQI
16th Sep 2026219 PMAQI
16th Sep 20262310 PMAQI
16th Sep 20262511 PMAQI
17th Sep 20262112 AMAQI
17th Sep 2026211 AMAQI
17th Sep 2026212 AMAQI
17th Sep 2026233 AMAQI
17th Sep 2026214 AMAQI

22°C22/24°C

17th Sep 2026255 AMAQI
17th Sep 2026196 AMAQI
17th Sep 2026217 AMAQI
17th Sep 2026238 AMAQI
17th Sep 2026219 AMAQI
17th Sep 20262310 AMAQI
17th Sep 20262111 AMAQI
17th Sep 20261712 PMAQI
17th Sep 2026191 PMAQI
17th Sep 2026172 PMAQI
17th Sep 2026253 PMAQI
17th Sep 2026274 PMAQI
17th Sep 2026465 PMAQI
17th Sep 2026216 PMAQI
17th Sep 2026277 PMAQI
17th Sep 2026218 PMAQI
17th Sep 2026299 PMAQI
17th Sep 20262110 PMAQI
17th Sep 20262511 PMAQI
18th Sep 20262112 AMAQI
18th Sep 2026211 AMAQI
18th Sep 2026252 AMAQI
18th Sep 2026213 AMAQI
18th Sep 2026234 AMAQI

23°C21/27°C

18th Sep 2026255 AMAQI
18th Sep 2026216 AMAQI
18th Sep 2026257 AMAQI
18th Sep 2026258 AMAQI
18th Sep 2026259 AMAQI
18th Sep 20262710 AMAQI
18th Sep 20262911 AMAQI
18th Sep 20262912 PMAQI
18th Sep 2026331 PMAQI
18th Sep 2026232 PMAQI
18th Sep 2026423 PMAQI
18th Sep 2026424 PMAQI
18th Sep 2026535 PMAQI
18th Sep 2026446 PMAQI
18th Sep 2026407 PMAQI
18th Sep 2026428 PMAQI
18th Sep 2026319 PMAQI
18th Sep 20263610 PMAQI
18th Sep 20264811 PMAQI
19th Sep 20265012 AMAQI
19th Sep 2026541 AMAQI
19th Sep 2026502 AMAQI
19th Sep 2026423 AMAQI
19th Sep 2026514 AMAQI

24°C22/28°C

19th Sep 2026515 AMAQI
19th Sep 2026546 AMAQI
19th Sep 2026527 AMAQI
19th Sep 2026468 AMAQI
19th Sep 2026529 AMAQI
19th Sep 20265010 AMAQI
19th Sep 20265111 AMAQI
19th Sep 20265312 PMAQI
19th Sep 2026521 PMAQI
19th Sep 2026522 PMAQI
19th Sep 2026503 PMAQI
19th Sep 2026544 PMAQI
19th Sep 2026505 PMAQI
19th Sep 2026486 PMAQI
19th Sep 2026517 PMAQI
19th Sep 2026408 PMAQI
19th Sep 2026389 PMAQI
19th Sep 20263110 PMAQI
19th Sep 20263611 PMAQI
20th Sep 20263812 AMAQI
20th Sep 2026361 AMAQI
20th Sep 2026402 AMAQI
20th Sep 2026293 AMAQI
20th Sep 2026334 AMAQI

25°C22/30°C

20th Sep 2026335 AMAQI
20th Sep 2026386 AMAQI
20th Sep 2026367 AMAQI
20th Sep 2026368 AMAQI
20th Sep 2026299 AMAQI
20th Sep 20263110 AMAQI
20th Sep 20263111 AMAQI
20th Sep 20262912 PMAQI
20th Sep 2026291 PMAQI
20th Sep 2026292 PMAQI
20th Sep 2026293 PMAQI
20th Sep 2026254 PMAQI
20th Sep 2026255 PMAQI
20th Sep 2026296 PMAQI
20th Sep 2026277 PMAQI
20th Sep 2026368 PMAQI
20th Sep 2026279 PMAQI
20th Sep 20262510 PMAQI
20th Sep 20262311 PMAQI
21st Sep 20262512 AMAQI
21st Sep 2026211 AMAQI
21st Sep 2026212 AMAQI
21st Sep 2026233 AMAQI
21st Sep 2026214 AMAQI

25°C23/29°C

21st Sep 2026235 AMAQI
21st Sep 2026256 AMAQI
21st Sep 2026217 AMAQI
21st Sep 2026298 AMAQI
21st Sep 2026259 AMAQI
21st Sep 20262110 AMAQI
21st Sep 20262511 AMAQI
21st Sep 20262512 PMAQI
21st Sep 2026251 PMAQI
21st Sep 2026252 PMAQI
21st Sep 2026233 PMAQI
21st Sep 2026214 PMAQI
21st Sep 2026195 PMAQI
21st Sep 2026216 PMAQI
21st Sep 2026237 PMAQI
21st Sep 2026178 PMAQI
21st Sep 2026199 PMAQI
21st Sep 20261710 PMAQI
21st Sep 20261711 PMAQI
22nd Sep 20261912 AMAQI
22nd Sep 2026171 AMAQI
22nd Sep 2026322 AMAQI
22nd Sep 2026403 AMAQI
22nd Sep 2026344 AMAQI

25°C23/28°C

22nd Sep 2026315 AMAQI
22nd Sep 2026236 AMAQI
22nd Sep 2026237 AMAQI
22nd Sep 2026258 AMAQI
22nd Sep 2026259 AMAQI
22nd Sep 20262510 AMAQI
22nd Sep 20262111 AMAQI
22nd Sep 20261912 PMAQI
22nd Sep 2026251 PMAQI
22nd Sep 2026252 PMAQI
22nd Sep 2026293 PMAQI
22nd Sep 2026334 PMAQI
22nd Sep 2026255 PMAQI
22nd Sep 2026296 PMAQI
22nd Sep 2026277 PMAQI
22nd Sep 2026298 PMAQI
22nd Sep 2026219 PMAQI
22nd Sep 20262110 PMAQI
22nd Sep 20262111 PMAQI
23rd Sep 20262112 AMAQI
23rd Sep 2026521 AMAQI
23rd Sep 2026422 AMAQI
23rd Sep 2026213 AMAQI
23rd Sep 2026274 AMAQI

26°C22/31°C

23rd Sep 2026425 AMAQI
23rd Sep 2026366 AMAQI
23rd Sep 2026297 AMAQI
23rd Sep 2026218 AMAQI
23rd Sep 2026259 AMAQI
23rd Sep 20263110 AMAQI
23rd Sep 20262511 AMAQI
23rd Sep 20262912 PMAQI
23rd Sep 2026271 PMAQI
23rd Sep 2026292 PMAQI
23rd Sep 2026313 PMAQI
23rd Sep 2026234 PMAQI
23rd Sep 2026235 PMAQI
23rd Sep 2026256 PMAQI
23rd Sep 2026467 PMAQI
23rd Sep 2026488 PMAQI
23rd Sep 2026509 PMAQI
23rd Sep 20264610 PMAQI
23rd Sep 20263611 PMAQI
24th Sep 20263112 AMAQI
24th Sep 2026271 AMAQI
24th Sep 2026272 AMAQI
24th Sep 2026293 AMAQI
24th Sep 2026294 AMAQI

24°C22/27°C

24th Sep 2026235 AMAQI
24th Sep 2026236 AMAQI
24th Sep 2026257 AMAQI
24th Sep 2026298 AMAQI
24th Sep 2026239 AMAQI
24th Sep 20262110 AMAQI
24th Sep 20263311 AMAQI
24th Sep 20264212 PMAQI
24th Sep 2026251 PMAQI
24th Sep 2026292 PMAQI
24th Sep 2026313 PMAQI
24th Sep 2026384 PMAQI
24th Sep 2026505 PMAQI
24th Sep 2026316 PMAQI
24th Sep 2026367 PMAQI
24th Sep 2026508 PMAQI
24th Sep 2026409 PMAQI
24th Sep 20263410 PMAQI
24th Sep 20262511 PMAQI
25th Sep 20262512 AMAQI
25th Sep 2026271 AMAQI
25th Sep 2026252 AMAQI
25th Sep 2026253 AMAQI
25th Sep 2026254 AMAQI

24°C21/30°C

25th Sep 2026255 AMAQI
25th Sep 2026256 AMAQI
25th Sep 2026277 AMAQI
25th Sep 2026278 AMAQI
25th Sep 2026299 AMAQI
25th Sep 20263110 AMAQI
25th Sep 20263111 AMAQI
25th Sep 20263312 PMAQI
25th Sep 2026331 PMAQI
25th Sep 2026362 PMAQI
25th Sep 2026363 PMAQI
25th Sep 2026384 PMAQI
25th Sep 2026545 PMAQI
25th Sep 2026486 PMAQI
25th Sep 2026537 PMAQI
25th Sep 2026408 PMAQI
25th Sep 2026369 PMAQI
25th Sep 20264210 PMAQI
25th Sep 20263811 PMAQI
26th Sep 20264412 AMAQI
26th Sep 2026441 AMAQI
26th Sep 2026422 AMAQI
26th Sep 2026423 AMAQI
26th Sep 2026504 AMAQI

23°C20/27°C

26th Sep 2026525 AMAQI
26th Sep 2026466 AMAQI
26th Sep 2026487 AMAQI
26th Sep 2026448 AMAQI
26th Sep 2026429 AMAQI
26th Sep 20263310 AMAQI
26th Sep 20264011 AMAQI
26th Sep 20262912 PMAQI
26th Sep 2026291 PMAQI
26th Sep 2026272 PMAQI
26th Sep 2026253 PMAQI
26th Sep 2026254 PMAQI
26th Sep 2026275 PMAQI
26th Sep 2026256 PMAQI
26th Sep 2026297 PMAQI
26th Sep 2026318 PMAQI
26th Sep 2026259 PMAQI
26th Sep 20262910 PMAQI
26th Sep 20262911 PMAQI
27th Sep 20263112 AMAQI
27th Sep 2026331 AMAQI
27th Sep 2026312 AMAQI
27th Sep 2026273 AMAQI
27th Sep 2026274 AMAQI

20°C19/23°C

27th Sep 2026255 AMAQI
27th Sep 2026216 AMAQI
27th Sep 2026257 AMAQI
27th Sep 2026258 AMAQI
27th Sep 2026219 AMAQI
27th Sep 20262310 AMAQI
27th Sep 20262311 AMAQI
27th Sep 20262512 PMAQI
27th Sep 2026271 PMAQI
27th Sep 2026232 PMAQI
27th Sep 2026233 PMAQI
27th Sep 2026294 PMAQI
27th Sep 2026385 PMAQI
27th Sep 2026506 PMAQI
27th Sep 2026237 PMAQI
27th Sep 2026298 PMAQI
27th Sep 2026279 PMAQI
27th Sep 20262910 PMAQI
27th Sep 20262311 PMAQI
28th Sep 20262912 AMAQI
28th Sep 2026231 AMAQI
28th Sep 2026272 AMAQI
28th Sep 2026253 AMAQI
28th Sep 2026254 AMAQI

21°C19/23°C

28th Sep 2026215 AMAQI
5 AM
28th Sep 2026216 AMAQI
28th Sep 2026257 AMAQI
28th Sep 2026238 AMAQI
28th Sep 2026259 AMAQI
28th Sep 20262310 AMAQI
28th Sep 20262511 AMAQI
11 AM
28th Sep 20262112 PMAQI
28th Sep 2026251 PMAQI
28th Sep 2026252 PMAQI
28th Sep 2026233 PMAQI
28th Sep 2026294 PMAQI
28th Sep 2026335 PMAQI
28th Sep 2026296 PMAQI
6 PM
28th Sep 2026257 PMAQI
28th Sep 2026298 PMAQI
28th Sep 2026299 PMAQI
28th Sep 20262310 PMAQI
28th Sep 20262511 PMAQI
11 PM
4 AM

21°C21/22°C

Day time
Avg. Highest Time
5 PM

32AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
6 AM - 7 AM

27AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 PM to 5 PM (Avg. 32), while the lowest AQI was between 6 AM to 7 AM (Avg. 27).
Night time
Avg. Highest Time
7 PM - 8 PM

30AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
3 AM

26AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 8 PM (Avg. 30), while the lowest AQI was between 3 AM to 3 AM (Avg. 26).

2026 Days Vs Air Quality

Seto, Aichi, Japan

2026

89%

241

11%

30

Total number of days with different AQI categories in last 271 days in 2026 (94 days remaining)

Good
241 Days
Moderate
30 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 89%

Health Risk Level:

Low

In 2026, 89% of 271 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

Seto, Aichi, 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
22AQI (US)
2nd January 2026
13AQI (US)
3rd January 2026
16AQI (US)
4th January 2026
22AQI (US)
5th January 2026
43AQI (US)
6th January 2026
24AQI (US)
7th January 2026
21AQI (US)
8th January 2026
25AQI (US)
9th January 2026
17AQI (US)
10th January 2026
23AQI (US)
11th January 2026
28AQI (US)
12th January 2026
13AQI (US)
13th January 2026
35AQI (US)
14th January 2026
21AQI (US)
15th January 2026
29AQI (US)
16th January 2026
52AQI (US)
17th January 2026
42AQI (US)
18th January 2026
54AQI (US)
19th January 2026
60AQI (US)
20th January 2026
33AQI (US)
21st January 2026
11AQI (US)
22nd January 2026
21AQI (US)
23rd January 2026
39AQI (US)
24th January 2026
38AQI (US)
25th January 2026
41AQI (US)
26th January 2026
30AQI (US)
27th January 2026
42AQI (US)
28th January 2026
29AQI (US)
29th January 2026
29AQI (US)
30th January 2026
35AQI (US)
31st January 2026
34AQI (US)
1st February 2026
35AQI (US)
2nd February 2026
48AQI (US)
3rd February 2026
32AQI (US)
4th February 2026
33AQI (US)
5th February 2026
32AQI (US)
6th February 2026
37AQI (US)
7th February 2026
13AQI (US)
8th February 2026
16AQI (US)
9th February 2026
34AQI (US)
10th February 2026
46AQI (US)
11th February 2026
48AQI (US)
12th February 2026
44AQI (US)
13th February 2026
46AQI (US)
14th February 2026
64AQI (US)
15th February 2026
42AQI (US)
16th February 2026
42AQI (US)
17th February 2026
17AQI (US)
18th February 2026
28AQI (US)
19th February 2026
31AQI (US)
20th February 2026
30AQI (US)
21st February 2026
48AQI (US)
22nd February 2026
28AQI (US)
23rd February 2026
42AQI (US)
24th February 2026
49AQI (US)
25th February 2026
20AQI (US)
26th February 2026
18AQI (US)
27th February 2026
48AQI (US)
28th February 2026
41AQI (US)
1st March 2026
19AQI (US)
2nd March 2026
80AQI (US)
3rd March 2026
50AQI (US)
4th March 2026
23AQI (US)
5th March 2026
42AQI (US)
6th March 2026
52AQI (US)
7th March 2026
46AQI (US)
8th March 2026
45AQI (US)
9th March 2026
50AQI (US)
10th March 2026
58AQI (US)
11th March 2026
56AQI (US)
12th March 2026
67AQI (US)
13th March 2026
46AQI (US)
14th March 2026
47AQI (US)
15th March 2026
61AQI (US)
16th March 2026
61AQI (US)
17th March 2026
53AQI (US)
18th March 2026
61AQI (US)
19th March 2026
21AQI (US)
20th March 2026
35AQI (US)
21st March 2026
46AQI (US)
22nd March 2026
53AQI (US)
23rd March 2026
49AQI (US)
24th March 2026
43AQI (US)
25th March 2026
61AQI (US)
26th March 2026
15AQI (US)
27th March 2026
25AQI (US)
28th March 2026
58AQI (US)
29th March 2026
54AQI (US)
30th March 2026
38AQI (US)
31st March 2026
15AQI (US)
1st April 2026
25AQI (US)
2nd April 2026
43AQI (US)
3rd April 2026
48AQI (US)
4th April 2026
42AQI (US)
5th April 2026
31AQI (US)
6th April 2026
31AQI (US)
7th April 2026
37AQI (US)
8th April 2026
26AQI (US)
9th April 2026
29AQI (US)
10th April 2026
45AQI (US)
11th April 2026
35AQI (US)
12th April 2026
37AQI (US)
13th April 2026
38AQI (US)
14th April 2026
47AQI (US)
15th April 2026
32AQI (US)
16th April 2026
19AQI (US)
17th April 2026
42AQI (US)
18th April 2026
32AQI (US)
19th April 2026
26AQI (US)
20th April 2026
28AQI (US)
21st April 2026
40AQI (US)
22nd April 2026
47AQI (US)
23rd April 2026
38AQI (US)
24th April 2026
23AQI (US)
25th April 2026
46AQI (US)
26th April 2026
50AQI (US)
27th April 2026
49AQI (US)
28th April 2026
44AQI (US)
29th April 2026
40AQI (US)
30th April 2026
36AQI (US)
1st May 2026
48AQI (US)
2nd May 2026
51AQI (US)
3rd May 2026
51AQI (US)
4th May 2026
24AQI (US)
5th May 2026
21AQI (US)
6th May 2026
34AQI (US)
7th May 2026
35AQI (US)
8th May 2026
27AQI (US)
9th May 2026
27AQI (US)
10th May 2026
35AQI (US)
11th May 2026
36AQI (US)
12th May 2026
39AQI (US)
13th May 2026
44AQI (US)
14th May 2026
40AQI (US)
15th May 2026
47AQI (US)
16th May 2026
85AQI (US)
17th May 2026
67AQI (US)
18th May 2026
53AQI (US)
19th May 2026
48AQI (US)
20th May 2026
61AQI (US)
21st May 2026
60AQI (US)
22nd May 2026
61AQI (US)
23rd May 2026
55AQI (US)
24th May 2026
59AQI (US)
25th May 2026
48AQI (US)
26th May 2026
39AQI (US)
27th May 2026
24AQI (US)
28th May 2026
25AQI (US)
29th May 2026
24AQI (US)
30th May 2026
24AQI (US)
31st May 2026
27AQI (US)
1st June 2026
29AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
27AQI (US)
4th June 2026
24AQI (US)
5th June 2026
22AQI (US)
6th June 2026
25AQI (US)
7th June 2026
21AQI (US)
8th June 2026
20AQI (US)
9th June 2026
22AQI (US)
10th June 2026
22AQI (US)
11th June 2026
25AQI (US)
12th June 2026
27AQI (US)
13th June 2026
42AQI (US)
14th June 2026
25AQI (US)
15th June 2026
22AQI (US)
16th June 2026
27AQI (US)
17th June 2026
24AQI (US)
18th June 2026
25AQI (US)
19th June 2026
30AQI (US)
20th June 2026
22AQI (US)
21st June 2026
18AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
22AQI (US)
24th June 2026
21AQI (US)
25th June 2026
27AQI (US)
26th June 2026
29AQI (US)
27th June 2026
26AQI (US)
28th June 2026
28AQI (US)
29th June 2026
39AQI (US)
30th June 2026
62AQI (US)
1st July 2026
43AQI (US)
2nd July 2026
16AQI (US)
3rd July 2026
21AQI (US)
4th July 2026
24AQI (US)
5th July 2026
22AQI (US)
6th July 2026
19AQI (US)
7th July 2026
25AQI (US)
8th July 2026
25AQI (US)
9th July 2026
25AQI (US)
10th July 2026
28AQI (US)
11th July 2026
18AQI (US)
12th July 2026
26AQI (US)
13th July 2026
32AQI (US)
14th July 2026
26AQI (US)
15th July 2026
30AQI (US)
16th July 2026
47AQI (US)
17th July 2026
47AQI (US)
18th July 2026
43AQI (US)
19th July 2026
20AQI (US)
20th July 2026
32AQI (US)
21st July 2026
57AQI (US)
22nd July 2026
71AQI (US)
23rd July 2026
48AQI (US)
24th July 2026
36AQI (US)
25th July 2026
39AQI (US)
26th July 2026
39AQI (US)
27th July 2026
30AQI (US)
28th July 2026
32AQI (US)
29th July 2026
25AQI (US)
30th July 2026
44AQI (US)
31st July 2026
39AQI (US)
1st August 2026
36AQI (US)
2nd August 2026
46AQI (US)
3rd August 2026
45AQI (US)
4th August 2026
32AQI (US)
5th August 2026
36AQI (US)
6th August 2026
26AQI (US)
7th August 2026
25AQI (US)
8th August 2026
26AQI (US)
9th August 2026
25AQI (US)
10th August 2026
25AQI (US)
11th August 2026
23AQI (US)
12th August 2026
24AQI (US)
13th August 2026
27AQI (US)
14th August 2026
25AQI (US)
15th August 2026
25AQI (US)
16th August 2026
24AQI (US)
17th August 2026
25AQI (US)
18th August 2026
25AQI (US)
19th August 2026
24AQI (US)
20th August 2026
25AQI (US)
21st August 2026
29AQI (US)
22nd August 2026
32AQI (US)
23rd August 2026
32AQI (US)
24th August 2026
31AQI (US)
25th August 2026
36AQI (US)
26th August 2026
37AQI (US)
27th August 2026
25AQI (US)
28th August 2026
22AQI (US)
29th August 2026
29AQI (US)
30th August 2026
34AQI (US)
31st August 2026
33AQI (US)
1st September 2026
36AQI (US)
2nd September 2026
25AQI (US)
3rd September 2026
24AQI (US)
4th September 2026
24AQI (US)
5th September 2026
24AQI (US)
6th September 2026
25AQI (US)
7th September 2026
24AQI (US)
8th September 2026
25AQI (US)
9th September 2026
28AQI (US)
10th September 2026
24AQI (US)
11th September 2026
25AQI (US)
12th September 2026
33AQI (US)
13th September 2026
24AQI (US)
14th September 2026
25AQI (US)
15th September 2026
26AQI (US)
16th September 2026
24AQI (US)
17th September 2026
23AQI (US)
18th September 2026
31AQI (US)
19th September 2026
48AQI (US)
20th September 2026
31AQI (US)
21st September 2026
22AQI (US)
22nd September 2026
26AQI (US)
23rd September 2026
33AQI (US)
24th September 2026
31AQI (US)
25th September 2026
34AQI (US)
26th September 2026
36AQI (US)
27th September 2026
27AQI (US)
28th September 2026
25AQI (US)
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

30AQI (US)

36AQI (US)

46AQI (US)

37AQI (US)

43AQI (US)

27AQI (US)

33AQI (US)

29AQI (US)

28AQI (US)

No. of days

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

202634AQI (US)

28
3
27
1
18
13
30
21
10
29
1
29
2
31
28
241
30

Highest AQI (US) recorded in

March

46AQI (US)

Lowest AQI (US) recorded in

June

27AQI (US)

202533AQI (US)

31
28
29
2
30
31
30
19
12
20
11
30
26
5
27
3
26
5
327
38

Highest AQI (US) recorded in

July

47AQI (US)

Lowest AQI (US) recorded in

April

19AQI (US)

202429AQI (US)

31
29
30
1
30
31
29
1
31
30
1
30
31
30
31
363
3

Highest AQI (US) recorded in

April

36AQI (US)

Lowest AQI (US) recorded in

January

24AQI (US)

202327AQI (US)

31
28
31
30
30
1
29
1
31
31
30
31
29
31
362
2

Highest AQI (US) recorded in

April

36AQI (US)

Lowest AQI (US) recorded in

August

20AQI (US)

202227AQI (US)

31
21
31
29
30
1
30
21
1
27
1
31
30
31
313
2

Highest AQI (US) recorded in

May

36AQI (US)

Lowest AQI (US) recorded in

August

12AQI (US)

202124AQI (US)

30
28
31
28
2
29
2
28
2
31
31
30
31
30
31
358
6

Highest AQI (US) recorded in

June

35AQI (US)

Lowest AQI (US) recorded in

January

12AQI (US)

202014AQI (US)

13
21
18
30
31
31
19
31
30
31
255

Highest AQI (US) recorded in

August

21AQI (US)

Lowest AQI (US) recorded in

December

11AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2026(Avg.)
34AQI (US)
Least Polluted Year Recorded
2020(Avg.)
14AQI (US)

Seto's annual 2026 AQI (US) (34) shows an average percentage change of 42.7% (worsened AQI (US)) compared to previous years: 2020 (14), 2021 (24), 2022 (27), 2023 (27), 2024 (29), 2025 (33).