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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Yokomachi, Itoigawa, 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

Yokomachi, Itoigawa, Niigata, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2024
54AQI
Lowest AQI recorded on
27th Aug 2024
22AQI

Same Day Analysis (17th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 22 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 16th Aug - 17th Aug 2026

Yokomachi, Itoigawa, Niigata, Japan

AQI
Day
Night
.

4 AM16th Aug 2026

6 PM

3 AM17th Aug 2026

Day time
Avg. Highest Time
8AM16th Aug

33AQI

Avg. Lowest Time
5PM16th Aug

23AQI

Night time
Avg. Highest Time
4AM16th Aug

25AQI

Avg. Lowest Time
2AM17th Aug

21AQI

In the last 24 hours,

Yokomachi's AQI reached its highest point of 33 at 8 AM during the Day, while the lowest point, 21, was recorded at 2 AM during the Night between 16th Aug and 17th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Yokomachi, Itoigawa, Niigata, Japan

JulAug
19th - 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 - 16th16th - 17th17th
Day
Night
19th Jul 2026274 AMAQI
19th Jul 2026295 AMAQI
19th Jul 2026316 AMAQI
19th Jul 2026327 AMAQI
19th Jul 2026298 AMAQI
19th Jul 2026279 AMAQI
19th Jul 20262510 AMAQI
19th Jul 20263111 AMAQI
19th Jul 20263312 PMAQI
19th Jul 2026441 PMAQI
19th Jul 2026482 PMAQI
19th Jul 2026503 PMAQI
19th Jul 2026454 PMAQI
19th Jul 2026425 PMAQI
19th Jul 2026466 PMAQI
19th Jul 2026497 PMAQI
19th Jul 2026468 PMAQI
19th Jul 2026409 PMAQI
19th Jul 20264210 PMAQI
19th Jul 20264011 PMAQI
20th Jul 20264912 AMAQI
20th Jul 2026461 AMAQI
20th Jul 2026472 AMAQI
20th Jul 2026543 AMAQI

26°C22/30°C

20th Jul 2026544 AMAQI
20th Jul 2026565 AMAQI
20th Jul 2026556 AMAQI
20th Jul 2026507 AMAQI
20th Jul 2026528 AMAQI
20th Jul 2026549 AMAQI
20th Jul 20265510 AMAQI
20th Jul 20265411 AMAQI
20th Jul 20265412 PMAQI
20th Jul 2026561 PMAQI
20th Jul 2026592 PMAQI
20th Jul 2026583 PMAQI
20th Jul 2026584 PMAQI
20th Jul 2026565 PMAQI
20th Jul 2026586 PMAQI
20th Jul 2026597 PMAQI
20th Jul 2026568 PMAQI
20th Jul 2026629 PMAQI
20th Jul 20266210 PMAQI
20th Jul 20265811 PMAQI
21st Jul 20265812 AMAQI
21st Jul 2026571 AMAQI
21st Jul 2026572 AMAQI
21st Jul 2026623 AMAQI

26°C23/30°C

21st Jul 2026594 AMAQI
21st Jul 2026575 AMAQI
21st Jul 2026646 AMAQI
21st Jul 2026637 AMAQI
21st Jul 2026628 AMAQI
21st Jul 2026609 AMAQI
21st Jul 20266410 AMAQI
21st Jul 20266411 AMAQI
21st Jul 2026631 PMAQI
21st Jul 2026642 PMAQI
21st Jul 2026643 PMAQI
21st Jul 2026684 PMAQI
21st Jul 2026645 PMAQI
21st Jul 2026646 PMAQI
21st Jul 2026947 PMAQI
21st Jul 2026648 PMAQI
21st Jul 2026589 PMAQI
21st Jul 20266010 PMAQI
21st Jul 20265911 PMAQI
22nd Jul 20265812 AMAQI
22nd Jul 2026621 AMAQI
22nd Jul 2026582 AMAQI
22nd Jul 2026623 AMAQI

26°C23/28°C

22nd Jul 2026624 AMAQI
22nd Jul 2026635 AMAQI
22nd Jul 2026586 AMAQI
22nd Jul 2026677 AMAQI
22nd Jul 2026668 AMAQI
22nd Jul 2026629 AMAQI
22nd Jul 20266810 AMAQI
22nd Jul 20266611 AMAQI
22nd Jul 20266812 PMAQI
22nd Jul 2026651 PMAQI
22nd Jul 2026682 PMAQI
22nd Jul 2026723 PMAQI
22nd Jul 2026884 PMAQI
22nd Jul 2026715 PMAQI
22nd Jul 2026876 PMAQI
22nd Jul 2026727 PMAQI
22nd Jul 2026828 PMAQI
22nd Jul 2026539 PMAQI
22nd Jul 20263810 PMAQI
22nd Jul 20261811 PMAQI
23rd Jul 20262912 AMAQI
23rd Jul 2026571 AMAQI
23rd Jul 2026582 AMAQI
23rd Jul 2026563 AMAQI

27°C23/30°C

23rd Jul 2026804 AMAQI
23rd Jul 2026805 AMAQI
23rd Jul 2026646 AMAQI
23rd Jul 2026727 AMAQI
23rd Jul 2026638 AMAQI
23rd Jul 2026789 AMAQI
23rd Jul 20264810 AMAQI
23rd Jul 20264911 AMAQI
23rd Jul 20265212 PMAQI
23rd Jul 2026311 PMAQI
23rd Jul 2026532 PMAQI
23rd Jul 2026683 PMAQI
23rd Jul 2026634 PMAQI
23rd Jul 2026555 PMAQI
23rd Jul 2026256 PMAQI
23rd Jul 2026167 PMAQI
23rd Jul 2026178 PMAQI
23rd Jul 2026369 PMAQI
23rd Jul 20264410 PMAQI
23rd Jul 20266011 PMAQI
24th Jul 20262712 AMAQI
24th Jul 2026521 AMAQI
24th Jul 2026312 AMAQI
24th Jul 2026623 AMAQI

26°C23/29°C

24th Jul 2026424 AMAQI
24th Jul 2026545 AMAQI
24th Jul 2026366 AMAQI
24th Jul 2026277 AMAQI
24th Jul 2026298 AMAQI
24th Jul 2026509 AMAQI
24th Jul 20262910 AMAQI
24th Jul 20262511 AMAQI
24th Jul 20263612 PMAQI
24th Jul 2026271 PMAQI
24th Jul 2026272 PMAQI
24th Jul 2026253 PMAQI
24th Jul 2026424 PMAQI
24th Jul 2026385 PMAQI
24th Jul 2026406 PMAQI
24th Jul 2026387 PMAQI
24th Jul 2026368 PMAQI
24th Jul 2026299 PMAQI
24th Jul 20262910 PMAQI
24th Jul 20263611 PMAQI
25th Jul 20264012 AMAQI
25th Jul 2026361 AMAQI
25th Jul 2026382 AMAQI
25th Jul 2026443 AMAQI

25°C22/28°C

25th Jul 2026444 AMAQI
25th Jul 2026485 AMAQI
25th Jul 2026466 AMAQI
25th Jul 2026517 AMAQI
25th Jul 2026488 AMAQI
25th Jul 2026509 AMAQI
25th Jul 20264810 AMAQI
25th Jul 20265211 AMAQI
25th Jul 20265112 PMAQI
25th Jul 2026511 PMAQI
25th Jul 2026552 PMAQI
25th Jul 2026513 PMAQI
25th Jul 2026484 PMAQI
25th Jul 2026485 PMAQI
25th Jul 2026446 PMAQI
25th Jul 2026427 PMAQI
25th Jul 2026408 PMAQI
25th Jul 2026339 PMAQI
25th Jul 20263610 PMAQI
25th Jul 20263311 PMAQI
26th Jul 20263312 AMAQI
26th Jul 2026361 AMAQI
26th Jul 2026362 AMAQI
26th Jul 2026363 AMAQI

25°C22/28°C

26th Jul 2026334 AMAQI
26th Jul 2026315 AMAQI
26th Jul 2026296 AMAQI
26th Jul 2026277 AMAQI
26th Jul 2026298 AMAQI
26th Jul 2026319 AMAQI
26th Jul 20263310 AMAQI
26th Jul 20262511 AMAQI
26th Jul 20262512 PMAQI
26th Jul 2026231 PMAQI
26th Jul 2026232 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026254 PMAQI
26th Jul 2026255 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026237 PMAQI
26th Jul 2026258 PMAQI
26th Jul 2026299 PMAQI
26th Jul 20261710 PMAQI
26th Jul 20263111 PMAQI
27th Jul 20265112 AMAQI
27th Jul 2026251 AMAQI
27th Jul 2026252 AMAQI
27th Jul 2026253 AMAQI

24°C21/25°C

27th Jul 2026254 AMAQI
27th Jul 2026255 AMAQI
27th Jul 2026216 AMAQI
27th Jul 2026217 AMAQI
27th Jul 2026238 AMAQI
27th Jul 2026219 AMAQI
27th Jul 20262310 AMAQI
27th Jul 20262511 AMAQI
27th Jul 20262112 PMAQI
27th Jul 2026211 PMAQI
27th Jul 2026252 PMAQI
27th Jul 2026193 PMAQI
27th Jul 2026214 PMAQI
27th Jul 2026215 PMAQI
27th Jul 2026216 PMAQI
27th Jul 2026217 PMAQI
27th Jul 2026218 PMAQI
27th Jul 2026219 PMAQI
27th Jul 20262310 PMAQI
27th Jul 20262111 PMAQI
28th Jul 20262312 AMAQI
28th Jul 2026211 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026213 AMAQI

24°C20/26°C

28th Jul 2026234 AMAQI
28th Jul 2026255 AMAQI
28th Jul 2026256 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026318 AMAQI
28th Jul 2026279 AMAQI
28th Jul 20263310 AMAQI
28th Jul 20262911 AMAQI
28th Jul 20263112 PMAQI
28th Jul 2026311 PMAQI
28th Jul 2026292 PMAQI
28th Jul 2026293 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026295 PMAQI
28th Jul 2026276 PMAQI
28th Jul 2026337 PMAQI
28th Jul 2026318 PMAQI
28th Jul 2026279 PMAQI
28th Jul 20262910 PMAQI
28th Jul 20262911 PMAQI
29th Jul 20262512 AMAQI
29th Jul 2026251 AMAQI
29th Jul 2026252 AMAQI
29th Jul 2026253 AMAQI

23°C21/28°C

29th Jul 2026234 AMAQI
29th Jul 2026215 AMAQI
29th Jul 2026216 AMAQI
29th Jul 2026217 AMAQI
29th Jul 2026218 AMAQI
29th Jul 2026259 AMAQI
29th Jul 20262110 AMAQI
29th Jul 20262511 AMAQI
29th Jul 20262512 PMAQI
29th Jul 2026231 PMAQI
29th Jul 2026192 PMAQI
29th Jul 2026213 PMAQI
29th Jul 2026274 PMAQI
29th Jul 2026215 PMAQI
29th Jul 2026216 PMAQI
29th Jul 2026277 PMAQI
29th Jul 2026278 PMAQI
29th Jul 2026259 PMAQI
29th Jul 20262310 PMAQI
29th Jul 20263311 PMAQI
30th Jul 20262912 AMAQI
30th Jul 2026311 AMAQI
30th Jul 2026332 AMAQI
30th Jul 2026333 AMAQI

24°C21/27°C

30th Jul 2026364 AMAQI
30th Jul 2026385 AMAQI
30th Jul 2026366 AMAQI
30th Jul 2026447 AMAQI
30th Jul 2026428 AMAQI
30th Jul 2026449 AMAQI
30th Jul 20264610 AMAQI
30th Jul 20264411 AMAQI
30th Jul 20264912 PMAQI
30th Jul 2026511 PMAQI
30th Jul 2026502 PMAQI
30th Jul 2026483 PMAQI
30th Jul 2026504 PMAQI
30th Jul 2026475 PMAQI
30th Jul 2026506 PMAQI
30th Jul 2026487 PMAQI
30th Jul 2026468 PMAQI
30th Jul 2026609 PMAQI
30th Jul 20264210 PMAQI
30th Jul 20264411 PMAQI
31st Jul 20264812 AMAQI
31st Jul 2026581 AMAQI
31st Jul 2026312 AMAQI
31st Jul 2026463 AMAQI

24°C20/29°C

31st Jul 2026464 AMAQI
31st Jul 2026515 AMAQI
31st Jul 2026466 AMAQI
31st Jul 2026447 AMAQI
31st Jul 2026448 AMAQI
31st Jul 2026429 AMAQI
31st Jul 20264010 AMAQI
31st Jul 20264011 AMAQI
31st Jul 20264012 PMAQI
31st Jul 2026441 PMAQI
31st Jul 2026362 PMAQI
31st Jul 2026383 PMAQI
31st Jul 2026384 PMAQI
31st Jul 2026465 PMAQI
31st Jul 2026466 PMAQI
31st Jul 2026447 PMAQI
31st Jul 2026428 PMAQI
31st Jul 2026369 PMAQI
31st Jul 20264210 PMAQI
31st Jul 20264411 PMAQI
1st Aug 20264812 AMAQI
1st Aug 2026421 AMAQI
1st Aug 2026462 AMAQI
1st Aug 2026463 AMAQI

25°C22/28°C

1st Aug 2026464 AMAQI
1st Aug 2026485 AMAQI
1st Aug 2026406 AMAQI
1st Aug 2026427 AMAQI
1st Aug 2026408 AMAQI
1st Aug 2026449 AMAQI
1st Aug 20264610 AMAQI
1st Aug 20264211 AMAQI
1st Aug 20264012 PMAQI
1st Aug 2026421 PMAQI
1st Aug 2026382 PMAQI
1st Aug 2026403 PMAQI
1st Aug 2026404 PMAQI
1st Aug 2026385 PMAQI
1st Aug 2026446 PMAQI
1st Aug 2026387 PMAQI
1st Aug 2026348 PMAQI
1st Aug 2026339 PMAQI
1st Aug 20263610 PMAQI
1st Aug 20263611 PMAQI
2nd Aug 20264012 AMAQI
2nd Aug 2026441 AMAQI
2nd Aug 2026442 AMAQI
2nd Aug 2026403 AMAQI

25°C22/30°C

2nd Aug 2026424 AMAQI
2nd Aug 2026385 AMAQI
2nd Aug 2026426 AMAQI
2nd Aug 2026427 AMAQI
2nd Aug 2026408 AMAQI
2nd Aug 2026369 AMAQI
2nd Aug 20263810 AMAQI
2nd Aug 20264811 AMAQI
2nd Aug 20264212 PMAQI
2nd Aug 2026481 PMAQI
2nd Aug 2026512 PMAQI
2nd Aug 2026463 PMAQI
2nd Aug 2026464 PMAQI
2nd Aug 2026505 PMAQI
2nd Aug 2026446 PMAQI
2nd Aug 2026427 PMAQI
2nd Aug 2026428 PMAQI
2nd Aug 2026469 PMAQI
2nd Aug 20263810 PMAQI
2nd Aug 20263811 PMAQI
3rd Aug 20263612 AMAQI
3rd Aug 2026381 AMAQI
3rd Aug 2026382 AMAQI
3rd Aug 2026333 AMAQI

25°C22/29°C

3rd Aug 2026364 AMAQI
3rd Aug 2026315 AMAQI
3rd Aug 2026426 AMAQI
3rd Aug 2026387 AMAQI
3rd Aug 2026388 AMAQI
3rd Aug 2026409 AMAQI
3rd Aug 20264010 AMAQI
3rd Aug 20264211 AMAQI
3rd Aug 20264412 PMAQI
3rd Aug 2026481 PMAQI
3rd Aug 2026402 PMAQI
3rd Aug 2026383 PMAQI
3rd Aug 2026364 PMAQI
3rd Aug 2026405 PMAQI
3rd Aug 2026336 PMAQI
3rd Aug 2026317 PMAQI
3rd Aug 2026298 PMAQI
3rd Aug 2026299 PMAQI
3rd Aug 20262710 PMAQI
3rd Aug 20262711 PMAQI
4th Aug 20262512 AMAQI
4th Aug 2026291 AMAQI
4th Aug 2026272 AMAQI
4th Aug 2026273 AMAQI

25°C22/28°C

4th Aug 2026254 AMAQI
4th Aug 2026255 AMAQI
4th Aug 2026236 AMAQI
4th Aug 2026277 AMAQI
4th Aug 2026298 AMAQI
4th Aug 2026299 AMAQI
4th Aug 20262710 AMAQI
4th Aug 20262911 AMAQI
4th Aug 20262912 PMAQI
4th Aug 2026251 PMAQI
4th Aug 2026272 PMAQI
4th Aug 2026313 PMAQI
4th Aug 2026314 PMAQI
4th Aug 2026335 PMAQI
4th Aug 2026296 PMAQI
4th Aug 2026297 PMAQI
4th Aug 2026318 PMAQI
4th Aug 2026299 PMAQI
4th Aug 20263110 PMAQI
4th Aug 20262911 PMAQI
5th Aug 20262712 AMAQI
5th Aug 2026311 AMAQI
5th Aug 2026312 AMAQI
5th Aug 2026293 AMAQI

25°C21/29°C

5th Aug 2026294 AMAQI
5th Aug 2026315 AMAQI
5th Aug 2026276 AMAQI
5th Aug 2026277 AMAQI
5th Aug 2026298 AMAQI
5th Aug 2026319 AMAQI
5th Aug 20263110 AMAQI
5th Aug 20262911 AMAQI
5th Aug 20263612 PMAQI
5th Aug 2026331 PMAQI
5th Aug 2026362 PMAQI
5th Aug 2026363 PMAQI
5th Aug 2026404 PMAQI
5th Aug 2026405 PMAQI
5th Aug 2026406 PMAQI
5th Aug 2026387 PMAQI
5th Aug 2026408 PMAQI
5th Aug 2026389 PMAQI
5th Aug 20263310 PMAQI
5th Aug 20263311 PMAQI
6th Aug 20263312 AMAQI
6th Aug 2026361 AMAQI
6th Aug 2026332 AMAQI
6th Aug 2026383 AMAQI

25°C20/30°C

6th Aug 2026424 AMAQI
6th Aug 2026385 AMAQI
6th Aug 2026406 AMAQI
6th Aug 2026427 AMAQI
6th Aug 2026428 AMAQI
6th Aug 2026389 AMAQI
6th Aug 20263810 AMAQI
6th Aug 20264011 AMAQI
6th Aug 20263812 PMAQI
6th Aug 2026401 PMAQI
6th Aug 2026462 PMAQI
6th Aug 2026383 PMAQI
6th Aug 2026424 PMAQI
6th Aug 2026385 PMAQI
6th Aug 2026406 PMAQI
6th Aug 2026407 PMAQI
6th Aug 2026468 PMAQI
6th Aug 2026489 PMAQI
6th Aug 20264210 PMAQI
6th Aug 20264211 PMAQI
7th Aug 20264212 AMAQI
7th Aug 2026441 AMAQI
7th Aug 2026472 AMAQI
7th Aug 2026503 AMAQI

26°C22/31°C

7th Aug 2026514 AMAQI
7th Aug 2026565 AMAQI
7th Aug 2026536 AMAQI
7th Aug 2026557 AMAQI
7th Aug 2026568 AMAQI
7th Aug 2026549 AMAQI
7th Aug 20265710 AMAQI
7th Aug 20265611 AMAQI
7th Aug 20265712 PMAQI
7th Aug 2026451 PMAQI
7th Aug 2026522 PMAQI
7th Aug 2026533 PMAQI
7th Aug 2026534 PMAQI
7th Aug 2026525 PMAQI
7th Aug 2026496 PMAQI
7th Aug 2026527 PMAQI
7th Aug 2026528 PMAQI
7th Aug 2026509 PMAQI
7th Aug 20265210 PMAQI
7th Aug 20264811 PMAQI
8th Aug 20265512 AMAQI
8th Aug 2026511 AMAQI
8th Aug 2026522 AMAQI
8th Aug 2026483 AMAQI

26°C22/31°C

8th Aug 2026484 AMAQI
8th Aug 2026495 AMAQI
8th Aug 2026466 AMAQI
8th Aug 2026447 AMAQI
8th Aug 2026428 AMAQI
8th Aug 2026429 AMAQI
8th Aug 20264610 AMAQI
8th Aug 20264811 AMAQI
8th Aug 20264912 PMAQI
8th Aug 2026461 PMAQI
8th Aug 2026442 PMAQI
8th Aug 2026493 PMAQI
8th Aug 2026504 PMAQI
8th Aug 2026515 PMAQI
8th Aug 2026426 PMAQI
8th Aug 2026527 PMAQI
8th Aug 2026468 PMAQI
8th Aug 2026449 PMAQI
8th Aug 20263810 PMAQI
8th Aug 20263811 PMAQI
9th Aug 20261212 AMAQI
9th Aug 2026251 AMAQI
9th Aug 2026272 AMAQI
9th Aug 2026253 AMAQI

25°C22/29°C

9th Aug 2026254 AMAQI
9th Aug 2026385 AMAQI
9th Aug 2026466 AMAQI
9th Aug 2026447 AMAQI
9th Aug 2026428 AMAQI
9th Aug 202689 AMAQI
9th Aug 20261210 AMAQI
9th Aug 20262511 AMAQI
9th Aug 20263612 PMAQI
9th Aug 2026101 PMAQI
9th Aug 2026312 PMAQI
9th Aug 2026333 PMAQI
9th Aug 2026334 PMAQI
9th Aug 2026295 PMAQI
9th Aug 2026276 PMAQI
9th Aug 2026217 PMAQI
9th Aug 2026238 PMAQI
9th Aug 2026259 PMAQI
9th Aug 20262510 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20262512 AMAQI
10th Aug 2026271 AMAQI
10th Aug 2026252 AMAQI
10th Aug 2026253 AMAQI

25°C23/27°C

10th Aug 2026234 AMAQI
10th Aug 2026275 AMAQI
10th Aug 2026236 AMAQI
10th Aug 2026257 AMAQI
10th Aug 2026258 AMAQI
10th Aug 2026219 AMAQI
10th Aug 20262110 AMAQI
10th Aug 20262111 AMAQI
10th Aug 20262512 PMAQI
10th Aug 2026231 PMAQI
10th Aug 2026212 PMAQI
10th Aug 2026213 PMAQI
10th Aug 2026234 PMAQI
10th Aug 2026235 PMAQI
10th Aug 2026276 PMAQI
10th Aug 2026257 PMAQI
10th Aug 2026258 PMAQI
10th Aug 2026239 PMAQI
10th Aug 20262110 PMAQI
10th Aug 20262111 PMAQI
11th Aug 20262112 AMAQI
11th Aug 2026211 AMAQI
11th Aug 2026232 AMAQI
11th Aug 2026233 AMAQI

24°C20/26°C

11th Aug 2026254 AMAQI
11th Aug 2026215 AMAQI
11th Aug 2026236 AMAQI
11th Aug 2026257 AMAQI
11th Aug 2026258 AMAQI
11th Aug 2026219 AMAQI
11th Aug 20262310 AMAQI
11th Aug 20262511 AMAQI
11th Aug 20262912 PMAQI
11th Aug 2026251 PMAQI
11th Aug 2026252 PMAQI
11th Aug 2026213 PMAQI
11th Aug 2026234 PMAQI
11th Aug 2026215 PMAQI
11th Aug 2026256 PMAQI
11th Aug 2026237 PMAQI
11th Aug 2026258 PMAQI
11th Aug 2026219 PMAQI
11th Aug 20262310 PMAQI
11th Aug 20262111 PMAQI
12th Aug 20262112 AMAQI
12th Aug 2026231 AMAQI
12th Aug 2026212 AMAQI
12th Aug 2026233 AMAQI

23°C20/25°C

12th Aug 2026214 AMAQI
12th Aug 2026215 AMAQI
12th Aug 2026216 AMAQI
12th Aug 2026217 AMAQI
12th Aug 2026218 AMAQI
12th Aug 2026219 AMAQI
12th Aug 20262110 AMAQI
12th Aug 20262311 AMAQI
12th Aug 20262312 PMAQI
12th Aug 2026231 PMAQI
12th Aug 2026192 PMAQI
12th Aug 2026213 PMAQI
12th Aug 2026214 PMAQI
12th Aug 2026235 PMAQI
12th Aug 2026236 PMAQI
12th Aug 2026237 PMAQI
12th Aug 2026218 PMAQI
12th Aug 2026239 PMAQI
12th Aug 20262310 PMAQI
12th Aug 20262511 PMAQI
13th Aug 20262312 AMAQI
13th Aug 2026191 AMAQI
13th Aug 2026212 AMAQI
13th Aug 2026233 AMAQI

24°C21/29°C

13th Aug 2026214 AMAQI
13th Aug 2026215 AMAQI
13th Aug 2026216 AMAQI
13th Aug 2026217 AMAQI
13th Aug 2026238 AMAQI
13th Aug 2026219 AMAQI
13th Aug 20262110 AMAQI
13th Aug 20262111 AMAQI
13th Aug 20262112 PMAQI
13th Aug 2026211 PMAQI
13th Aug 2026212 PMAQI
13th Aug 2026213 PMAQI
13th Aug 2026234 PMAQI
13th Aug 2026235 PMAQI
13th Aug 2026256 PMAQI
13th Aug 2026217 PMAQI
13th Aug 2026218 PMAQI
13th Aug 2026219 PMAQI
13th Aug 20262110 PMAQI
13th Aug 20262311 PMAQI
14th Aug 20262112 AMAQI
14th Aug 2026251 AMAQI
14th Aug 2026232 AMAQI
14th Aug 2026253 AMAQI

25°C21/30°C

14th Aug 2026214 AMAQI
14th Aug 2026215 AMAQI
14th Aug 2026216 AMAQI
14th Aug 2026217 AMAQI
14th Aug 2026218 AMAQI
14th Aug 2026219 AMAQI
14th Aug 20262710 AMAQI
14th Aug 20262511 AMAQI
14th Aug 20262512 PMAQI
14th Aug 2026211 PMAQI
14th Aug 2026252 PMAQI
14th Aug 2026213 PMAQI
14th Aug 2026234 PMAQI
14th Aug 2026215 PMAQI
14th Aug 2026216 PMAQI
14th Aug 2026217 PMAQI
14th Aug 2026258 PMAQI
14th Aug 2026219 PMAQI
14th Aug 20262510 PMAQI
14th Aug 20262111 PMAQI
15th Aug 20262112 AMAQI
15th Aug 2026211 AMAQI
15th Aug 2026232 AMAQI
15th Aug 2026213 AMAQI

24°C21/29°C

15th Aug 2026214 AMAQI
15th Aug 2026215 AMAQI
15th Aug 2026216 AMAQI
15th Aug 2026217 AMAQI
15th Aug 2026238 AMAQI
15th Aug 2026219 AMAQI
15th Aug 20262510 AMAQI
15th Aug 20262311 AMAQI
15th Aug 20262112 PMAQI
15th Aug 2026211 PMAQI
15th Aug 2026232 PMAQI
15th Aug 2026253 PMAQI
15th Aug 2026254 PMAQI
15th Aug 2026235 PMAQI
15th Aug 2026216 PMAQI
15th Aug 2026217 PMAQI
15th Aug 2026258 PMAQI
15th Aug 2026259 PMAQI
15th Aug 20262710 PMAQI
15th Aug 20262511 PMAQI
16th Aug 20262512 AMAQI
16th Aug 2026251 AMAQI
16th Aug 2026252 AMAQI
16th Aug 2026213 AMAQI

25°C21/29°C

16th Aug 2026254 AMAQI
16th Aug 2026295 AMAQI
16th Aug 2026276 AMAQI
16th Aug 2026297 AMAQI
16th Aug 2026338 AMAQI
16th Aug 2026299 AMAQI
16th Aug 20262910 AMAQI
16th Aug 20262711 AMAQI
16th Aug 20263112 PMAQI
16th Aug 2026271 PMAQI
16th Aug 2026272 PMAQI
16th Aug 2026293 PMAQI
16th Aug 2026234 PMAQI
16th Aug 2026235 PMAQI
16th Aug 2026256 PMAQI
16th Aug 2026257 PMAQI
16th Aug 2026258 PMAQI
16th Aug 2026259 PMAQI
16th Aug 20262510 PMAQI
16th Aug 20262511 PMAQI
17th Aug 20262112 AMAQI
17th Aug 2026211 AMAQI
17th Aug 2026212 AMAQI
17th Aug 2026233 AMAQI

24°C22/28°C

17th Aug 2026214 AMAQI
4 AM
17th Aug 2026215 AMAQI
17th Aug 2026256 AMAQI
17th Aug 2026217 AMAQI
17th Aug 2026218 AMAQI
17th Aug 2026219 AMAQI
17th Aug 20262510 AMAQI
17th Aug 20262111 AMAQI
11 AM
17th Aug 20262312 PMAQI
17th Aug 2026231 PMAQI
17th Aug 2026232 PMAQI
17th Aug 2026213 PMAQI
17th Aug 2026214 PMAQI
17th Aug 2026255 PMAQI
17th Aug 2026216 PMAQI
6 PM
17th Aug 2026217 PMAQI
17th Aug 2026258 PMAQI
17th Aug 2026259 PMAQI
17th Aug 20262510 PMAQI
17th Aug 20262511 PMAQI
11 PM
3 AM

14°C14/16°C

Day time
Avg. Highest Time
2 PM - 6 PM

37AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
4 AM - 1 PM

36AQI

10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 6 PM (Avg. 37), while the lowest AQI was between 4 AM to 1 PM (Avg. 36).
Night time
Avg. Highest Time
3 AM - 9 PM

36AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
12 AM

33AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 AM to 9 PM (Avg. 36), while the lowest AQI was between 12 AM to 12 AM (Avg. 33).

2026 Days Vs Air Quality

Yokomachi, Itoigawa, Niigata, Japan

2026

85%

194

15%

35

Total number of days with different AQI categories in last 229 days in 2026 (136 days remaining)

Good
194 Days
Moderate
35 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 85%

Health Risk Level:

Low

In 2026, 85% of 229 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

Yokomachi, Itoigawa, 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
22AQI (US)
2nd January 2026
31AQI (US)
3rd January 2026
34AQI (US)
4th January 2026
31AQI (US)
5th January 2026
34AQI (US)
6th January 2026
25AQI (US)
7th January 2026
23AQI (US)
8th January 2026
26AQI (US)
9th January 2026
28AQI (US)
10th January 2026
29AQI (US)
11th January 2026
27AQI (US)
12th January 2026
28AQI (US)
13th January 2026
31AQI (US)
14th January 2026
27AQI (US)
15th January 2026
46AQI (US)
16th January 2026
50AQI (US)
17th January 2026
45AQI (US)
18th January 2026
34AQI (US)
19th January 2026
49AQI (US)
20th January 2026
32AQI (US)
21st January 2026
19AQI (US)
22nd January 2026
25AQI (US)
23rd January 2026
34AQI (US)
24th January 2026
35AQI (US)
25th January 2026
42AQI (US)
26th January 2026
27AQI (US)
27th January 2026
36AQI (US)
28th January 2026
32AQI (US)
29th January 2026
27AQI (US)
30th January 2026
39AQI (US)
31st January 2026
43AQI (US)
1st February 2026
34AQI (US)
2nd February 2026
42AQI (US)
3rd February 2026
32AQI (US)
4th February 2026
38AQI (US)
5th February 2026
41AQI (US)
6th February 2026
38AQI (US)
7th February 2026
20AQI (US)
8th February 2026
10AQI (US)
9th February 2026
33AQI (US)
10th February 2026
41AQI (US)
11th February 2026
48AQI (US)
12th February 2026
41AQI (US)
13th February 2026
47AQI (US)
14th February 2026
61AQI (US)
15th February 2026
55AQI (US)
16th February 2026
43AQI (US)
17th February 2026
17AQI (US)
18th February 2026
32AQI (US)
19th February 2026
29AQI (US)
20th February 2026
35AQI (US)
21st February 2026
42AQI (US)
22nd February 2026
36AQI (US)
23rd February 2026
42AQI (US)
24th February 2026
34AQI (US)
25th February 2026
37AQI (US)
26th February 2026
27AQI (US)
27th February 2026
43AQI (US)
28th February 2026
36AQI (US)
1st March 2026
39AQI (US)
2nd March 2026
66AQI (US)
3rd March 2026
43AQI (US)
4th March 2026
47AQI (US)
5th March 2026
62AQI (US)
6th March 2026
56AQI (US)
7th March 2026
45AQI (US)
8th March 2026
44AQI (US)
9th March 2026
46AQI (US)
10th March 2026
55AQI (US)
11th March 2026
56AQI (US)
12th March 2026
63AQI (US)
13th March 2026
35AQI (US)
14th March 2026
49AQI (US)
15th March 2026
60AQI (US)
16th March 2026
55AQI (US)
17th March 2026
53AQI (US)
18th March 2026
54AQI (US)
19th March 2026
32AQI (US)
20th March 2026
32AQI (US)
21st March 2026
50AQI (US)
22nd March 2026
47AQI (US)
23rd March 2026
53AQI (US)
24th March 2026
76AQI (US)
25th March 2026
59AQI (US)
26th March 2026
23AQI (US)
27th March 2026
20AQI (US)
28th March 2026
58AQI (US)
29th March 2026
66AQI (US)
30th March 2026
64AQI (US)
31st March 2026
40AQI (US)
1st April 2026
39AQI (US)
2nd April 2026
18AQI (US)
3rd April 2026
42AQI (US)
4th April 2026
46AQI (US)
5th April 2026
33AQI (US)
6th April 2026
26AQI (US)
7th April 2026
32AQI (US)
8th April 2026
30AQI (US)
9th April 2026
29AQI (US)
10th April 2026
45AQI (US)
11th April 2026
40AQI (US)
12th April 2026
30AQI (US)
13th April 2026
30AQI (US)
14th April 2026
38AQI (US)
15th April 2026
52AQI (US)
16th April 2026
29AQI (US)
17th April 2026
28AQI (US)
18th April 2026
33AQI (US)
19th April 2026
33AQI (US)
20th April 2026
36AQI (US)
21st April 2026
42AQI (US)
22nd April 2026
28AQI (US)
23rd April 2026
21AQI (US)
24th April 2026
32AQI (US)
25th April 2026
46AQI (US)
26th April 2026
52AQI (US)
27th April 2026
50AQI (US)
28th April 2026
42AQI (US)
29th April 2026
40AQI (US)
30th April 2026
39AQI (US)
1st May 2026
48AQI (US)
2nd May 2026
55AQI (US)
3rd May 2026
46AQI (US)
4th May 2026
25AQI (US)
5th May 2026
27AQI (US)
6th May 2026
28AQI (US)
7th May 2026
31AQI (US)
8th May 2026
26AQI (US)
9th May 2026
27AQI (US)
10th May 2026
26AQI (US)
11th May 2026
29AQI (US)
12th May 2026
34AQI (US)
13th May 2026
40AQI (US)
14th May 2026
32AQI (US)
15th May 2026
34AQI (US)
16th May 2026
83AQI (US)
17th May 2026
67AQI (US)
18th May 2026
54AQI (US)
19th May 2026
48AQI (US)
20th May 2026
61AQI (US)
21st May 2026
61AQI (US)
22nd May 2026
64AQI (US)
23rd May 2026
56AQI (US)
24th May 2026
61AQI (US)
25th May 2026
50AQI (US)
26th May 2026
42AQI (US)
27th May 2026
51AQI (US)
28th May 2026
30AQI (US)
29th May 2026
18AQI (US)
30th May 2026
22AQI (US)
31st May 2026
29AQI (US)
1st June 2026
43AQI (US)
2nd June 2026
46AQI (US)
3rd June 2026
18AQI (US)
4th June 2026
17AQI (US)
5th June 2026
21AQI (US)
6th June 2026
24AQI (US)
7th June 2026
22AQI (US)
8th June 2026
21AQI (US)
9th June 2026
23AQI (US)
10th June 2026
22AQI (US)
11th June 2026
24AQI (US)
12th June 2026
25AQI (US)
13th June 2026
26AQI (US)
14th June 2026
23AQI (US)
15th June 2026
23AQI (US)
16th June 2026
27AQI (US)
17th June 2026
26AQI (US)
18th June 2026
27AQI (US)
19th June 2026
29AQI (US)
20th June 2026
24AQI (US)
21st June 2026
19AQI (US)
22nd June 2026
17AQI (US)
23rd June 2026
21AQI (US)
24th June 2026
20AQI (US)
25th June 2026
25AQI (US)
26th June 2026
29AQI (US)
27th June 2026
27AQI (US)
28th June 2026
27AQI (US)
29th June 2026
26AQI (US)
30th June 2026
23AQI (US)
1st July 2026
24AQI (US)
2nd July 2026
21AQI (US)
3rd July 2026
18AQI (US)
4th July 2026
25AQI (US)
5th July 2026
23AQI (US)
6th July 2026
21AQI (US)
7th July 2026
17AQI (US)
8th July 2026
25AQI (US)
9th July 2026
25AQI (US)
10th July 2026
28AQI (US)
11th July 2026
45AQI (US)
12th July 2026
30AQI (US)
13th July 2026
27AQI (US)
14th July 2026
27AQI (US)
15th July 2026
26AQI (US)
16th July 2026
35AQI (US)
17th July 2026
32AQI (US)
18th July 2026
46AQI (US)
19th July 2026
36AQI (US)
20th July 2026
55AQI (US)
21st July 2026
63AQI (US)
22nd July 2026
64AQI (US)
23rd July 2026
52AQI (US)
24th July 2026
36AQI (US)
25th July 2026
45AQI (US)
26th July 2026
28AQI (US)
27th July 2026
24AQI (US)
28th July 2026
27AQI (US)
29th July 2026
24AQI (US)
30th July 2026
43AQI (US)
31st July 2026
43AQI (US)
1st August 2026
41AQI (US)
2nd August 2026
43AQI (US)
3rd August 2026
36AQI (US)
4th August 2026
28AQI (US)
5th August 2026
33AQI (US)
6th August 2026
40AQI (US)
7th August 2026
52AQI (US)
8th August 2026
47AQI (US)
9th August 2026
27AQI (US)
10th August 2026
24AQI (US)
11th August 2026
23AQI (US)
12th August 2026
22AQI (US)
13th August 2026
22AQI (US)
14th August 2026
23AQI (US)
15th August 2026
23AQI (US)
16th August 2026
26AQI (US)
17th August 2026
22AQI (US)
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

33AQI (US)

37AQI (US)

50AQI (US)

36AQI (US)

42AQI (US)

25AQI (US)

33AQI (US)

31AQI (US)

No. of days

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

202636AQI (US)

31
26
2
15
16
28
2
21
10
30
27
4
16
1
194
35

Highest AQI (US) recorded in

March

50AQI (US)

Lowest AQI (US) recorded in

June

25AQI (US)

202541AQI (US)

31
28
24
7
28
2
24
7
21
9
22
9
23
8
30
12
19
22
8
27
4
292
73

Highest AQI (US) recorded in

October

50AQI (US)

Lowest AQI (US) recorded in

September

29AQI (US)

202437AQI (US)

31
29
25
6
15
15
30
1
16
14
28
3
30
1
26
4
31
27
3
31
319
47

Highest AQI (US) recorded in

April

51AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

202338AQI (US)

31
28
23
8
21
9
24
7
25
5
19
12
30
1
29
1
31
26
3
30
1
317
47

Highest AQI (US) recorded in

April

48AQI (US)

Lowest AQI (US) recorded in

January

30AQI (US)

202237AQI (US)

30
21
25
6
14
3
20
11
22
8
17
4
1
27
1
30
1
29
1
31
267
35

Highest AQI (US) recorded in

May

47AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

202134AQI (US)

30
1
24
4
27
2
18
3
25
6
19
11
23
8
26
5
30
31
30
23
306
40

Highest AQI (US) recorded in

June

49AQI (US)

Lowest AQI (US) recorded in

January

24AQI (US)

202030AQI (US)

12
1
21
17
1
24
6
28
1
14
15
2
19
30
1
27
3
31
223
28
2

Highest AQI (US) recorded in

August

55AQI (US)

Lowest AQI (US) recorded in

December

19AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2025(Avg.)
41AQI (US)
Least Polluted Year Recorded
2020(Avg.)
30AQI (US)

Yokomachi's annual 2026 AQI (US) (36) shows an average percentage change of 0.5% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (34), 2022 (37), 2023 (38), 2024 (37), 2025 (41).