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
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
3rd Aug 2021
72AQILowest AQI recorded on
22nd Aug 2021
21AQISame Day Analysis (21st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 21st Aug - 22nd Aug 2025
Yokomachi, Itoigawa, Niigata, Japan
AQI
Day
Night
.
4 AM21st Aug 2025
6 PM
3 AM22nd Aug 2025
Day time
Avg. Highest Time
9AM21st Aug
60AQI
Avg. Lowest Time
8AM21st Aug
48AQI
Night time
Avg. Highest Time
7PM21st Aug
53AQI
Avg. Lowest Time
3AM22nd Aug
48AQI
In the last 24 hours,
Yokomachi's AQI reached its highest point of 60 at 9 AM during the Day, while the lowest point, 48, was recorded at 3 AM during the Night between 21st Aug and 22nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Yokomachi, Itoigawa, Niigata, Japan
JulAug
23rd - 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 - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd
Day
Night
23rd Jul 2025404 AMAQI
23rd Jul 2025415 AMAQI
23rd Jul 2025426 AMAQI
23rd Jul 2025427 AMAQI
23rd Jul 2025428 AMAQI
23rd Jul 2025509 AMAQI
23rd Jul 20255510 AMAQI
23rd Jul 20255311 AMAQI
23rd Jul 20255312 PMAQI
23rd Jul 2025501 PMAQI
23rd Jul 2025442 PMAQI
23rd Jul 2025473 PMAQI
23rd Jul 2025524 PMAQI
23rd Jul 2025485 PMAQI
23rd Jul 2025436 PMAQI
23rd Jul 2025397 PMAQI
23rd Jul 2025398 PMAQI
23rd Jul 2025369 PMAQI
23rd Jul 20253610 PMAQI
23rd Jul 20254311 PMAQI
24th Jul 20254512 AMAQI
24th Jul 2025401 AMAQI
24th Jul 2025402 AMAQI
24th Jul 2025403 AMAQI
26°C23/30°C
24th Jul 2025414 AMAQI
24th Jul 2025425 AMAQI
24th Jul 2025426 AMAQI
24th Jul 2025427 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025489 AMAQI
24th Jul 20255410 AMAQI
24th Jul 20255411 AMAQI
24th Jul 20255312 PMAQI
24th Jul 2025461 PMAQI
24th Jul 2025482 PMAQI
24th Jul 2025503 PMAQI
24th Jul 2025544 PMAQI
24th Jul 2025535 PMAQI
24th Jul 2025526 PMAQI
24th Jul 2025547 PMAQI
24th Jul 2025508 PMAQI
24th Jul 2025429 PMAQI
24th Jul 20254010 PMAQI
24th Jul 20254411 PMAQI
25th Jul 20254812 AMAQI
25th Jul 2025471 AMAQI
25th Jul 2025422 AMAQI
25th Jul 2025413 AMAQI
26°C22/31°C
25th Jul 2025424 AMAQI
25th Jul 2025445 AMAQI
25th Jul 2025446 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025448 AMAQI
25th Jul 2025529 AMAQI
25th Jul 20256010 AMAQI
25th Jul 20255711 AMAQI
25th Jul 20255612 PMAQI
25th Jul 2025561 PMAQI
25th Jul 2025562 PMAQI
25th Jul 2025553 PMAQI
25th Jul 2025604 PMAQI
25th Jul 2025605 PMAQI
25th Jul 2025546 PMAQI
25th Jul 2025487 PMAQI
25th Jul 2025448 PMAQI
25th Jul 2025539 PMAQI
25th Jul 20254910 PMAQI
25th Jul 20254811 PMAQI
26th Jul 20255212 AMAQI
26th Jul 2025481 AMAQI
26th Jul 2025442 AMAQI
26th Jul 2025453 AMAQI
26°C21/31°C
26th Jul 2025454 AMAQI
26th Jul 2025475 AMAQI
26th Jul 2025486 AMAQI
26th Jul 2025477 AMAQI
26th Jul 2025478 AMAQI
26th Jul 2025549 AMAQI
26th Jul 20255710 AMAQI
26th Jul 20255511 AMAQI
26th Jul 20255312 PMAQI
26th Jul 2025501 PMAQI
26th Jul 2025452 PMAQI
26th Jul 2025413 PMAQI
26th Jul 2025444 PMAQI
26th Jul 2025485 PMAQI
26th Jul 2025466 PMAQI
26th Jul 2025367 PMAQI
26th Jul 2025328 PMAQI
26th Jul 2025369 PMAQI
26th Jul 20254010 PMAQI
26th Jul 20254611 PMAQI
27th Jul 20254812 AMAQI
27th Jul 2025491 AMAQI
27th Jul 2025462 AMAQI
27th Jul 2025463 AMAQI
27°C22/31°C
27th Jul 2025484 AMAQI
27th Jul 2025485 AMAQI
27th Jul 2025486 AMAQI
27th Jul 2025487 AMAQI
27th Jul 2025488 AMAQI
27th Jul 2025449 AMAQI
27th Jul 20253810 AMAQI
27th Jul 20253011 AMAQI
27th Jul 20253812 PMAQI
27th Jul 2025401 PMAQI
27th Jul 2025352 PMAQI
27th Jul 2025363 PMAQI
27th Jul 2025354 PMAQI
27th Jul 2025325 PMAQI
27th Jul 2025346 PMAQI
27th Jul 2025347 PMAQI
27th Jul 2025428 PMAQI
27th Jul 2025439 PMAQI
27th Jul 20254110 PMAQI
27th Jul 20254611 PMAQI
28th Jul 20254612 AMAQI
28th Jul 2025461 AMAQI
28th Jul 2025482 AMAQI
28th Jul 2025483 AMAQI
27°C24/31°C
28th Jul 2025474 AMAQI
28th Jul 2025465 AMAQI
28th Jul 2025466 AMAQI
28th Jul 2025467 AMAQI
28th Jul 2025468 AMAQI
28th Jul 2025369 AMAQI
28th Jul 20253010 AMAQI
28th Jul 20253511 AMAQI
28th Jul 20255012 PMAQI
28th Jul 2025551 PMAQI
28th Jul 2025422 PMAQI
28th Jul 2025443 PMAQI
28th Jul 2025524 PMAQI
28th Jul 2025505 PMAQI
28th Jul 2025506 PMAQI
28th Jul 2025467 PMAQI
28th Jul 2025458 PMAQI
28th Jul 2025469 PMAQI
28th Jul 20254110 PMAQI
28th Jul 20254311 PMAQI
29th Jul 20254912 AMAQI
29th Jul 2025481 AMAQI
29th Jul 2025452 AMAQI
29th Jul 2025463 AMAQI
28°C24/31°C
29th Jul 2025464 AMAQI
29th Jul 2025455 AMAQI
29th Jul 2025456 AMAQI
29th Jul 2025457 AMAQI
29th Jul 2025458 AMAQI
29th Jul 2025489 AMAQI
29th Jul 20255210 AMAQI
29th Jul 20255411 AMAQI
29th Jul 20255012 PMAQI
29th Jul 2025461 PMAQI
29th Jul 2025442 PMAQI
29th Jul 2025353 PMAQI
29th Jul 2025304 PMAQI
29th Jul 2025265 PMAQI
29th Jul 2025246 PMAQI
29th Jul 2025307 PMAQI
29th Jul 2025348 PMAQI
29th Jul 2025389 PMAQI
29th Jul 20253410 PMAQI
29th Jul 20254111 PMAQI
30th Jul 20254712 AMAQI
30th Jul 2025451 AMAQI
30th Jul 2025472 AMAQI
30th Jul 2025463 AMAQI
28°C24/31°C
30th Jul 2025464 AMAQI
30th Jul 2025465 AMAQI
30th Jul 2025466 AMAQI
30th Jul 2025467 AMAQI
30th Jul 2025468 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20255110 AMAQI
30th Jul 20254311 AMAQI
30th Jul 20254512 PMAQI
30th Jul 2025471 PMAQI
30th Jul 2025442 PMAQI
30th Jul 2025423 PMAQI
30th Jul 2025404 PMAQI
30th Jul 2025425 PMAQI
30th Jul 2025366 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025358 PMAQI
30th Jul 2025399 PMAQI
30th Jul 20254410 PMAQI
30th Jul 20254611 PMAQI
31st Jul 20254412 AMAQI
31st Jul 2025441 AMAQI
31st Jul 2025452 AMAQI
31st Jul 2025453 AMAQI
27°C23/32°C
31st Jul 2025464 AMAQI
31st Jul 2025465 AMAQI
31st Jul 2025466 AMAQI
31st Jul 2025467 AMAQI
31st Jul 2025468 AMAQI
31st Jul 2025469 AMAQI
31st Jul 20254610 AMAQI
31st Jul 20255311 AMAQI
31st Jul 20255112 PMAQI
31st Jul 2025501 PMAQI
31st Jul 2025482 PMAQI
31st Jul 2025443 PMAQI
31st Jul 2025524 PMAQI
31st Jul 2025535 PMAQI
31st Jul 2025516 PMAQI
31st Jul 2025527 PMAQI
31st Jul 2025458 PMAQI
31st Jul 2025379 PMAQI
31st Jul 20253810 PMAQI
31st Jul 20253411 PMAQI
1st Aug 20253612 AMAQI
1st Aug 2025431 AMAQI
1st Aug 2025422 AMAQI
1st Aug 2025413 AMAQI
28°C24/32°C
1st Aug 2025424 AMAQI
1st Aug 2025415 AMAQI
1st Aug 2025436 AMAQI
1st Aug 2025457 AMAQI
1st Aug 2025428 AMAQI
1st Aug 2025529 AMAQI
1st Aug 20254810 AMAQI
1st Aug 20255011 AMAQI
1st Aug 20254812 PMAQI
1st Aug 2025461 PMAQI
1st Aug 2025502 PMAQI
1st Aug 2025453 PMAQI
1st Aug 2025554 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025526 PMAQI
1st Aug 2025567 PMAQI
1st Aug 2025468 PMAQI
1st Aug 2025429 PMAQI
1st Aug 20254310 PMAQI
1st Aug 20254411 PMAQI
2nd Aug 20253412 AMAQI
2nd Aug 2025401 AMAQI
2nd Aug 2025402 AMAQI
2nd Aug 2025413 AMAQI
27°C23/32°C
2nd Aug 2025424 AMAQI
2nd Aug 2025435 AMAQI
2nd Aug 2025436 AMAQI
2nd Aug 2025417 AMAQI
2nd Aug 2025418 AMAQI
2nd Aug 2025469 AMAQI
2nd Aug 20254610 AMAQI
2nd Aug 20254211 AMAQI
2nd Aug 20253912 PMAQI
2nd Aug 2025421 PMAQI
2nd Aug 2025502 PMAQI
2nd Aug 2025513 PMAQI
2nd Aug 2025464 PMAQI
2nd Aug 2025495 PMAQI
2nd Aug 2025476 PMAQI
2nd Aug 2025447 PMAQI
2nd Aug 2025458 PMAQI
2nd Aug 2025419 PMAQI
2nd Aug 20253910 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20253412 AMAQI
3rd Aug 2025361 AMAQI
3rd Aug 2025402 AMAQI
3rd Aug 2025393 AMAQI
27°C23/30°C
3rd Aug 2025414 AMAQI
3rd Aug 2025415 AMAQI
3rd Aug 2025406 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025489 AMAQI
3rd Aug 20255110 AMAQI
3rd Aug 20254411 AMAQI
3rd Aug 20255812 PMAQI
3rd Aug 2025521 PMAQI
3rd Aug 2025502 PMAQI
3rd Aug 2025423 PMAQI
3rd Aug 2025504 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025536 PMAQI
3rd Aug 2025467 PMAQI
3rd Aug 2025428 PMAQI
3rd Aug 2025409 PMAQI
3rd Aug 20254010 PMAQI
3rd Aug 20254211 PMAQI
4th Aug 20253812 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025392 AMAQI
4th Aug 2025403 AMAQI
27°C23/31°C
4th Aug 2025434 AMAQI
4th Aug 2025425 AMAQI
4th Aug 2025426 AMAQI
4th Aug 2025437 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025539 AMAQI
4th Aug 20256010 AMAQI
4th Aug 20256311 AMAQI
4th Aug 20256312 PMAQI
4th Aug 2025591 PMAQI
4th Aug 2025682 PMAQI
4th Aug 2025673 PMAQI
4th Aug 2025734 PMAQI
4th Aug 2025725 PMAQI
4th Aug 2025716 PMAQI
4th Aug 2025647 PMAQI
4th Aug 2025628 PMAQI
4th Aug 2025599 PMAQI
4th Aug 20255710 PMAQI
4th Aug 20255211 PMAQI
5th Aug 20255512 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025402 AMAQI
5th Aug 2025403 AMAQI
27°C23/32°C
5th Aug 2025474 AMAQI
5th Aug 2025525 AMAQI
5th Aug 2025506 AMAQI
5th Aug 2025517 AMAQI
5th Aug 2025508 AMAQI
5th Aug 2025589 AMAQI
5th Aug 20255810 AMAQI
5th Aug 20255711 AMAQI
5th Aug 20255312 PMAQI
5th Aug 2025561 PMAQI
5th Aug 2025522 PMAQI
5th Aug 2025533 PMAQI
5th Aug 2025564 PMAQI
5th Aug 2025445 PMAQI
5th Aug 2025446 PMAQI
5th Aug 2025457 PMAQI
5th Aug 2025478 PMAQI
5th Aug 2025469 PMAQI
5th Aug 20254710 PMAQI
5th Aug 20254311 PMAQI
6th Aug 20254412 AMAQI
6th Aug 2025461 AMAQI
6th Aug 2025492 AMAQI
6th Aug 2025463 AMAQI
28°C25/32°C
6th Aug 2025504 AMAQI
6th Aug 2025505 AMAQI
6th Aug 2025516 AMAQI
6th Aug 2025517 AMAQI
6th Aug 2025508 AMAQI
6th Aug 2025429 AMAQI
6th Aug 20253310 AMAQI
6th Aug 20253511 AMAQI
6th Aug 20254012 PMAQI
6th Aug 2025381 PMAQI
6th Aug 2025442 PMAQI
6th Aug 2025323 PMAQI
6th Aug 2025384 PMAQI
6th Aug 2025425 PMAQI
6th Aug 2025366 PMAQI
6th Aug 2025497 PMAQI
6th Aug 2025508 PMAQI
6th Aug 2025459 PMAQI
6th Aug 20254510 PMAQI
6th Aug 20254411 PMAQI
7th Aug 20254412 AMAQI
7th Aug 2025461 AMAQI
7th Aug 2025472 AMAQI
7th Aug 2025463 AMAQI
27°C24/30°C
7th Aug 2025464 AMAQI
7th Aug 2025465 AMAQI
7th Aug 2025466 AMAQI
7th Aug 2025467 AMAQI
7th Aug 2025448 AMAQI
7th Aug 2025289 AMAQI
7th Aug 20253010 AMAQI
7th Aug 20253211 AMAQI
7th Aug 20252212 PMAQI
7th Aug 2025311 PMAQI
7th Aug 2025282 PMAQI
7th Aug 2025253 PMAQI
7th Aug 2025254 PMAQI
7th Aug 2025415 PMAQI
7th Aug 2025436 PMAQI
7th Aug 2025377 PMAQI
7th Aug 2025458 PMAQI
7th Aug 2025489 PMAQI
7th Aug 20254510 PMAQI
7th Aug 20253911 PMAQI
8th Aug 20254012 AMAQI
8th Aug 2025451 AMAQI
8th Aug 2025472 AMAQI
8th Aug 2025473 AMAQI
25°C22/29°C
8th Aug 2025464 AMAQI
8th Aug 2025415 AMAQI
8th Aug 2025416 AMAQI
8th Aug 2025407 AMAQI
8th Aug 2025408 AMAQI
8th Aug 2025279 AMAQI
8th Aug 20252510 AMAQI
8th Aug 20252611 AMAQI
8th Aug 20253012 PMAQI
8th Aug 2025381 PMAQI
8th Aug 2025362 PMAQI
8th Aug 2025323 PMAQI
8th Aug 2025334 PMAQI
8th Aug 2025345 PMAQI
8th Aug 2025326 PMAQI
8th Aug 2025267 PMAQI
8th Aug 2025258 PMAQI
8th Aug 2025379 PMAQI
8th Aug 20253610 PMAQI
8th Aug 20254411 PMAQI
9th Aug 20254512 AMAQI
9th Aug 2025431 AMAQI
9th Aug 2025442 AMAQI
9th Aug 2025423 AMAQI
24°C20/27°C
9th Aug 2025424 AMAQI
9th Aug 2025405 AMAQI
9th Aug 2025406 AMAQI
9th Aug 2025407 AMAQI
9th Aug 2025408 AMAQI
9th Aug 2025289 AMAQI
9th Aug 20252610 AMAQI
9th Aug 20253111 AMAQI
9th Aug 20252912 PMAQI
9th Aug 2025241 PMAQI
9th Aug 2025262 PMAQI
9th Aug 2025323 PMAQI
9th Aug 2025324 PMAQI
9th Aug 2025275 PMAQI
9th Aug 2025266 PMAQI
9th Aug 2025237 PMAQI
9th Aug 2025268 PMAQI
9th Aug 2025339 PMAQI
9th Aug 20253610 PMAQI
9th Aug 20253811 PMAQI
10th Aug 20253712 AMAQI
10th Aug 2025381 AMAQI
10th Aug 2025422 AMAQI
10th Aug 2025423 AMAQI
24°C19/28°C
10th Aug 2025414 AMAQI
10th Aug 2025385 AMAQI
10th Aug 2025386 AMAQI
10th Aug 2025387 AMAQI
10th Aug 2025388 AMAQI
10th Aug 2025429 AMAQI
10th Aug 20254110 AMAQI
10th Aug 20252611 AMAQI
10th Aug 20252712 PMAQI
10th Aug 2025341 PMAQI
10th Aug 2025362 PMAQI
10th Aug 2025333 PMAQI
10th Aug 2025314 PMAQI
10th Aug 2025315 PMAQI
10th Aug 2025336 PMAQI
10th Aug 2025247 PMAQI
10th Aug 2025248 PMAQI
10th Aug 2025339 PMAQI
10th Aug 20254010 PMAQI
10th Aug 20254411 PMAQI
11th Aug 20253412 AMAQI
11th Aug 2025341 AMAQI
11th Aug 2025382 AMAQI
11th Aug 2025393 AMAQI
22°C20/24°C
11th Aug 2025394 AMAQI
11th Aug 2025385 AMAQI
11th Aug 2025386 AMAQI
11th Aug 2025387 AMAQI
11th Aug 2025388 AMAQI
11th Aug 2025209 AMAQI
11th Aug 20251410 AMAQI
11th Aug 20251611 AMAQI
11th Aug 20251712 PMAQI
11th Aug 2025251 PMAQI
11th Aug 2025282 PMAQI
11th Aug 2025223 PMAQI
11th Aug 2025254 PMAQI
11th Aug 2025275 PMAQI
11th Aug 2025246 PMAQI
11th Aug 2025307 PMAQI
11th Aug 2025308 PMAQI
11th Aug 2025349 PMAQI
11th Aug 20253210 PMAQI
11th Aug 20253311 PMAQI
12th Aug 20253012 AMAQI
12th Aug 2025361 AMAQI
12th Aug 2025402 AMAQI
12th Aug 2025383 AMAQI
24°C21/28°C
12th Aug 2025364 AMAQI
12th Aug 2025345 AMAQI
12th Aug 2025346 AMAQI
12th Aug 2025347 AMAQI
12th Aug 2025348 AMAQI
12th Aug 2025259 AMAQI
12th Aug 20252210 AMAQI
12th Aug 20253411 AMAQI
12th Aug 20252812 PMAQI
12th Aug 2025301 PMAQI
12th Aug 2025262 PMAQI
12th Aug 2025223 PMAQI
12th Aug 2025254 PMAQI
12th Aug 2025285 PMAQI
12th Aug 2025276 PMAQI
12th Aug 2025337 PMAQI
12th Aug 2025298 PMAQI
12th Aug 2025369 PMAQI
12th Aug 20252810 PMAQI
12th Aug 20253011 PMAQI
13th Aug 20253112 AMAQI
13th Aug 2025341 AMAQI
13th Aug 2025362 AMAQI
13th Aug 2025363 AMAQI
23°C21/24°C
13th Aug 2025354 AMAQI
13th Aug 2025345 AMAQI
13th Aug 2025356 AMAQI
13th Aug 2025347 AMAQI
13th Aug 2025348 AMAQI
13th Aug 2025259 AMAQI
13th Aug 20252710 AMAQI
13th Aug 20253411 AMAQI
13th Aug 20252112 PMAQI
13th Aug 2025251 PMAQI
13th Aug 2025272 PMAQI
13th Aug 2025353 PMAQI
13th Aug 2025344 PMAQI
13th Aug 2025355 PMAQI
13th Aug 2025306 PMAQI
13th Aug 2025267 PMAQI
13th Aug 2025288 PMAQI
13th Aug 2025329 PMAQI
13th Aug 20253110 PMAQI
13th Aug 20253211 PMAQI
14th Aug 20253612 AMAQI
14th Aug 2025361 AMAQI
14th Aug 2025352 AMAQI
14th Aug 2025363 AMAQI
24°C21/28°C
14th Aug 2025344 AMAQI
14th Aug 2025345 AMAQI
14th Aug 2025336 AMAQI
14th Aug 2025327 AMAQI
14th Aug 2025348 AMAQI
14th Aug 2025339 AMAQI
14th Aug 20253410 AMAQI
14th Aug 20253411 AMAQI
14th Aug 20252812 PMAQI
14th Aug 2025291 PMAQI
14th Aug 2025282 PMAQI
14th Aug 2025273 PMAQI
14th Aug 2025244 PMAQI
14th Aug 2025285 PMAQI
14th Aug 2025256 PMAQI
14th Aug 2025277 PMAQI
14th Aug 2025328 PMAQI
14th Aug 2025359 PMAQI
14th Aug 20253610 PMAQI
14th Aug 20253511 PMAQI
15th Aug 20253612 AMAQI
15th Aug 2025341 AMAQI
15th Aug 2025332 AMAQI
15th Aug 2025323 AMAQI
26°C21/29°C
15th Aug 2025334 AMAQI
15th Aug 2025355 AMAQI
15th Aug 2025336 AMAQI
15th Aug 2025367 AMAQI
15th Aug 2025348 AMAQI
15th Aug 2025349 AMAQI
15th Aug 20253510 AMAQI
15th Aug 20254011 AMAQI
15th Aug 20253412 PMAQI
15th Aug 2025321 PMAQI
15th Aug 2025342 PMAQI
15th Aug 2025363 PMAQI
15th Aug 2025284 PMAQI
15th Aug 2025365 PMAQI
15th Aug 2025346 PMAQI
15th Aug 2025297 PMAQI
15th Aug 2025348 PMAQI
15th Aug 2025329 PMAQI
15th Aug 20253110 PMAQI
15th Aug 20253311 PMAQI
16th Aug 20253212 AMAQI
16th Aug 2025351 AMAQI
16th Aug 2025352 AMAQI
16th Aug 2025343 AMAQI
26°C22/29°C
16th Aug 2025364 AMAQI
16th Aug 2025375 AMAQI
16th Aug 2025376 AMAQI
16th Aug 2025367 AMAQI
16th Aug 2025378 AMAQI
16th Aug 2025289 AMAQI
16th Aug 20253010 AMAQI
16th Aug 20253411 AMAQI
16th Aug 20253612 PMAQI
16th Aug 2025411 PMAQI
16th Aug 2025412 PMAQI
16th Aug 2025343 PMAQI
16th Aug 2025374 PMAQI
16th Aug 2025345 PMAQI
16th Aug 2025286 PMAQI
16th Aug 2025257 PMAQI
16th Aug 2025308 PMAQI
16th Aug 2025349 PMAQI
16th Aug 20253410 PMAQI
16th Aug 20253111 PMAQI
17th Aug 20253212 AMAQI
17th Aug 2025381 AMAQI
17th Aug 2025362 AMAQI
17th Aug 2025363 AMAQI
25°C21/29°C
17th Aug 2025374 AMAQI
17th Aug 2025375 AMAQI
17th Aug 2025396 AMAQI
17th Aug 2025387 AMAQI
17th Aug 2025378 AMAQI
17th Aug 2025369 AMAQI
17th Aug 20253710 AMAQI
17th Aug 20254211 AMAQI
17th Aug 20254512 PMAQI
17th Aug 2025491 PMAQI
17th Aug 2025492 PMAQI
17th Aug 2025443 PMAQI
17th Aug 2025394 PMAQI
17th Aug 2025425 PMAQI
17th Aug 2025346 PMAQI
17th Aug 2025447 PMAQI
17th Aug 2025428 PMAQI
17th Aug 2025379 PMAQI
17th Aug 20253710 PMAQI
17th Aug 20253711 PMAQI
18th Aug 20253712 AMAQI
18th Aug 2025361 AMAQI
18th Aug 2025372 AMAQI
18th Aug 2025373 AMAQI
26°C23/30°C
18th Aug 2025374 AMAQI
18th Aug 2025405 AMAQI
18th Aug 2025406 AMAQI
18th Aug 2025407 AMAQI
18th Aug 2025398 AMAQI
18th Aug 2025419 AMAQI
18th Aug 20253810 AMAQI
18th Aug 20254511 AMAQI
18th Aug 20254612 PMAQI
18th Aug 2025421 PMAQI
18th Aug 2025472 PMAQI
18th Aug 2025453 PMAQI
18th Aug 2025484 PMAQI
18th Aug 2025515 PMAQI
18th Aug 2025446 PMAQI
18th Aug 2025437 PMAQI
18th Aug 2025428 PMAQI
18th Aug 2025419 PMAQI
18th Aug 20253710 PMAQI
18th Aug 20253711 PMAQI
19th Aug 20253312 AMAQI
19th Aug 2025381 AMAQI
19th Aug 2025392 AMAQI
19th Aug 2025383 AMAQI
25°C22/29°C
19th Aug 2025394 AMAQI
19th Aug 2025395 AMAQI
19th Aug 2025396 AMAQI
19th Aug 2025407 AMAQI
19th Aug 2025398 AMAQI
19th Aug 2025469 AMAQI
19th Aug 20254410 AMAQI
19th Aug 20254911 AMAQI
19th Aug 20255312 PMAQI
19th Aug 2025531 PMAQI
19th Aug 2025492 PMAQI
19th Aug 2025553 PMAQI
19th Aug 2025584 PMAQI
19th Aug 2025565 PMAQI
19th Aug 2025566 PMAQI
19th Aug 2025567 PMAQI
19th Aug 2025538 PMAQI
19th Aug 2025519 PMAQI
19th Aug 20255210 PMAQI
19th Aug 20255011 PMAQI
20th Aug 20255312 AMAQI
20th Aug 2025441 AMAQI
20th Aug 2025402 AMAQI
20th Aug 2025403 AMAQI
26°C22/31°C
20th Aug 2025434 AMAQI
20th Aug 2025435 AMAQI
20th Aug 2025446 AMAQI
20th Aug 2025427 AMAQI
20th Aug 2025438 AMAQI
20th Aug 2025589 AMAQI
20th Aug 20255610 AMAQI
20th Aug 20255611 AMAQI
20th Aug 20255912 PMAQI
20th Aug 2025581 PMAQI
20th Aug 2025602 PMAQI
20th Aug 2025573 PMAQI
20th Aug 2025584 PMAQI
20th Aug 2025555 PMAQI
20th Aug 2025566 PMAQI
20th Aug 2025557 PMAQI
20th Aug 2025548 PMAQI
20th Aug 2025539 PMAQI
20th Aug 20255210 PMAQI
20th Aug 20255411 PMAQI
21st Aug 20255312 AMAQI
21st Aug 2025461 AMAQI
21st Aug 2025432 AMAQI
21st Aug 2025443 AMAQI
26°C22/30°C
21st Aug 2025484 AMAQI
21st Aug 2025485 AMAQI
21st Aug 2025496 AMAQI
21st Aug 2025507 AMAQI
21st Aug 2025488 AMAQI
21st Aug 2025609 AMAQI
21st Aug 20255210 AMAQI
21st Aug 20255611 AMAQI
21st Aug 20255512 PMAQI
21st Aug 2025561 PMAQI
21st Aug 2025542 PMAQI
21st Aug 2025553 PMAQI
21st Aug 2025564 PMAQI
21st Aug 2025545 PMAQI
21st Aug 2025526 PMAQI
21st Aug 2025537 PMAQI
21st Aug 2025528 PMAQI
21st Aug 2025529 PMAQI
21st Aug 20255210 PMAQI
21st Aug 20255011 PMAQI
22nd Aug 20255212 AMAQI
22nd Aug 2025501 AMAQI
22nd Aug 2025502 AMAQI
22nd Aug 2025483 AMAQI
25°C22/29°C
22nd Aug 2025504 AMAQI
4 AM22nd Aug 2025505 AMAQI
22nd Aug 2025506 AMAQI
22nd Aug 2025517 AMAQI
22nd Aug 2025518 AMAQI
22nd Aug 2025549 AMAQI
22nd Aug 20255010 AMAQI
22nd Aug 20254811 AMAQI
11 AM22nd Aug 20255412 PMAQI
22nd Aug 2025501 PMAQI
22nd Aug 2025482 PMAQI
6 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 2 PM
42AQI
11 hours / Day
330 hours / Month
Avg. Lowest Time
3 PM
41AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 2 PM (Avg. 42), while the lowest AQI was between 3 PM to 3 PM (Avg. 41).
Night time
Avg. Highest Time
12 AM - 11 PM
41AQI
9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 10 PM
41AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 41), while the lowest AQI was between 12 AM to 10 PM (Avg. 41).
2025 Days Vs Air Quality
Yokomachi, Itoigawa, Niigata, Japan
2025
85%
197
15%
36
Total number of days with different AQI categories in last 234 days in 2025 (131 days remaining)
Good
197 DaysModerate
36 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 234 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 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.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
31AQI
31AQI
2nd January 2025
29AQI
29AQI
3rd January 2025
27AQI
27AQI
4th January 2025
27AQI
27AQI
5th January 2025
26AQI
26AQI
6th January 2025
30AQI
30AQI
7th January 2025
29AQI
29AQI
8th January 2025
29AQI
29AQI
9th January 2025
30AQI
30AQI
10th January 2025
28AQI
28AQI
11th January 2025
28AQI
28AQI
12th January 2025
27AQI
27AQI
13th January 2025
30AQI
30AQI
14th January 2025
35AQI
35AQI
15th January 2025
28AQI
28AQI
16th January 2025
27AQI
27AQI
17th January 2025
28AQI
28AQI
18th January 2025
28AQI
28AQI
19th January 2025
30AQI
30AQI
20th January 2025
33AQI
33AQI
21st January 2025
40AQI
40AQI
22nd January 2025
35AQI
35AQI
23rd January 2025
46AQI
46AQI
24th January 2025
39AQI
39AQI
25th January 2025
38AQI
38AQI
26th January 2025
31AQI
31AQI
27th January 2025
28AQI
28AQI
28th January 2025
30AQI
30AQI
29th January 2025
29AQI
29AQI
30th January 2025
31AQI
31AQI
31st January 2025
32AQI
32AQI
1st February 2025
35AQI
35AQI
2nd February 2025
31AQI
31AQI
3rd February 2025
33AQI
33AQI
4th February 2025
32AQI
32AQI
5th February 2025
31AQI
31AQI
6th February 2025
31AQI
31AQI
7th February 2025
35AQI
35AQI
8th February 2025
31AQI
31AQI
9th February 2025
31AQI
31AQI
10th February 2025
30AQI
30AQI
11th February 2025
32AQI
32AQI
12th February 2025
30AQI
30AQI
13th February 2025
35AQI
35AQI
14th February 2025
33AQI
33AQI
15th February 2025
32AQI
32AQI
16th February 2025
35AQI
35AQI
17th February 2025
40AQI
40AQI
18th February 2025
32AQI
32AQI
19th February 2025
33AQI
33AQI
20th February 2025
31AQI
31AQI
21st February 2025
32AQI
32AQI
22nd February 2025
34AQI
34AQI
23rd February 2025
33AQI
33AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
44AQI
44AQI
27th February 2025
50AQI
50AQI
28th February 2025
47AQI
47AQI
1st March 2025
49AQI
49AQI
2nd March 2025
48AQI
48AQI
3rd March 2025
40AQI
40AQI
4th March 2025
38AQI
38AQI
5th March 2025
30AQI
30AQI
6th March 2025
33AQI
33AQI
7th March 2025
36AQI
36AQI
8th March 2025
36AQI
36AQI
9th March 2025
35AQI
35AQI
10th March 2025
40AQI
40AQI
11th March 2025
37AQI
37AQI
12th March 2025
34AQI
34AQI
13th March 2025
50AQI
50AQI
14th March 2025
38AQI
38AQI
15th March 2025
37AQI
37AQI
16th March 2025
28AQI
28AQI
17th March 2025
28AQI
28AQI
18th March 2025
30AQI
30AQI
19th March 2025
23AQI
23AQI
20th March 2025
34AQI
34AQI
21st March 2025
50AQI
50AQI
22nd March 2025
51AQI
51AQI
23rd March 2025
66AQI
66AQI
24th March 2025
63AQI
63AQI
25th March 2025
75AQI
75AQI
26th March 2025
69AQI
69AQI
27th March 2025
70AQI
70AQI
28th March 2025
57AQI
57AQI
29th March 2025
44AQI
44AQI
30th March 2025
36AQI
36AQI
31st March 2025
36AQI
36AQI
1st April 2025
31AQI
31AQI
2nd April 2025
29AQI
29AQI
3rd April 2025
23AQI
23AQI
4th April 2025
22AQI
22AQI
5th April 2025
31AQI
31AQI
6th April 2025
27AQI
27AQI
7th April 2025
34AQI
34AQI
8th April 2025
38AQI
38AQI
9th April 2025
30AQI
30AQI
10th April 2025
38AQI
38AQI
11th April 2025
44AQI
44AQI
12th April 2025
42AQI
42AQI
13th April 2025
32AQI
32AQI
14th April 2025
34AQI
34AQI
15th April 2025
25AQI
25AQI
16th April 2025
38AQI
38AQI
17th April 2025
43AQI
43AQI
18th April 2025
52AQI
52AQI
19th April 2025
58AQI
58AQI
20th April 2025
48AQI
48AQI
21st April 2025
42AQI
42AQI
22nd April 2025
45AQI
45AQI
23rd April 2025
35AQI
35AQI
24th April 2025
26AQI
26AQI
25th April 2025
39AQI
39AQI
26th April 2025
48AQI
48AQI
27th April 2025
48AQI
48AQI
28th April 2025
47AQI
47AQI
29th April 2025
46AQI
46AQI
30th April 2025
49AQI
49AQI
1st May 2025
54AQI
54AQI
2nd May 2025
36AQI
36AQI
3rd May 2025
40AQI
40AQI
4th May 2025
36AQI
36AQI
5th May 2025
38AQI
38AQI
6th May 2025
35AQI
35AQI
7th May 2025
29AQI
29AQI
8th May 2025
30AQI
30AQI
9th May 2025
36AQI
36AQI
10th May 2025
28AQI
28AQI
11th May 2025
28AQI
28AQI
12th May 2025
39AQI
39AQI
13th May 2025
48AQI
48AQI
14th May 2025
51AQI
51AQI
15th May 2025
55AQI
55AQI
16th May 2025
56AQI
56AQI
17th May 2025
42AQI
42AQI
18th May 2025
52AQI
52AQI
19th May 2025
47AQI
47AQI
20th May 2025
63AQI
63AQI
21st May 2025
64AQI
64AQI
22nd May 2025
47AQI
47AQI
23rd May 2025
48AQI
48AQI
24th May 2025
47AQI
47AQI
25th May 2025
34AQI
34AQI
26th May 2025
33AQI
33AQI
27th May 2025
36AQI
36AQI
28th May 2025
35AQI
35AQI
29th May 2025
39AQI
39AQI
30th May 2025
35AQI
35AQI
31st May 2025
28AQI
28AQI
1st June 2025
32AQI
32AQI
2nd June 2025
40AQI
40AQI
3rd June 2025
43AQI
43AQI
4th June 2025
40AQI
40AQI
5th June 2025
42AQI
42AQI
6th June 2025
47AQI
47AQI
7th June 2025
52AQI
52AQI
8th June 2025
56AQI
56AQI
9th June 2025
60AQI
60AQI
10th June 2025
62AQI
62AQI
11th June 2025
47AQI
47AQI
12th June 2025
48AQI
48AQI
13th June 2025
41AQI
41AQI
14th June 2025
41AQI
41AQI
15th June 2025
30AQI
30AQI
16th June 2025
36AQI
36AQI
17th June 2025
39AQI
39AQI
18th June 2025
45AQI
45AQI
19th June 2025
50AQI
50AQI
20th June 2025
55AQI
55AQI
21st June 2025
60AQI
60AQI
22nd June 2025
69AQI
69AQI
23rd June 2025
48AQI
48AQI
24th June 2025
46AQI
46AQI
25th June 2025
48AQI
48AQI
26th June 2025
41AQI
41AQI
27th June 2025
56AQI
56AQI
28th June 2025
43AQI
43AQI
29th June 2025
43AQI
43AQI
30th June 2025
53AQI
53AQI
1st July 2025
54AQI
54AQI
2nd July 2025
58AQI
58AQI
3rd July 2025
60AQI
60AQI
4th July 2025
67AQI
67AQI
5th July 2025
68AQI
68AQI
6th July 2025
59AQI
59AQI
7th July 2025
61AQI
61AQI
8th July 2025
59AQI
59AQI
9th July 2025
55AQI
55AQI
10th July 2025
48AQI
48AQI
11th July 2025
49AQI
49AQI
12th July 2025
47AQI
47AQI
13th July 2025
50AQI
50AQI
14th July 2025
48AQI
48AQI
15th July 2025
40AQI
40AQI
16th July 2025
47AQI
47AQI
17th July 2025
35AQI
35AQI
18th July 2025
37AQI
37AQI
19th July 2025
36AQI
36AQI
20th July 2025
38AQI
38AQI
21st July 2025
38AQI
38AQI
22nd July 2025
42AQI
42AQI
23rd July 2025
43AQI
43AQI
24th July 2025
46AQI
46AQI
25th July 2025
50AQI
50AQI
26th July 2025
46AQI
46AQI
27th July 2025
42AQI
42AQI
28th July 2025
45AQI
45AQI
29th July 2025
41AQI
41AQI
30th July 2025
43AQI
43AQI
31st July 2025
46AQI
46AQI
1st August 2025
46AQI
46AQI
2nd August 2025
43AQI
43AQI
3rd August 2025
44AQI
44AQI
4th August 2025
54AQI
54AQI
5th August 2025
49AQI
49AQI
6th August 2025
44AQI
44AQI
7th August 2025
40AQI
40AQI
8th August 2025
37AQI
37AQI
9th August 2025
34AQI
34AQI
10th August 2025
35AQI
35AQI
11th August 2025
30AQI
30AQI
12th August 2025
31AQI
31AQI
13th August 2025
31AQI
31AQI
14th August 2025
32AQI
32AQI
15th August 2025
34AQI
34AQI
16th August 2025
34AQI
34AQI
17th August 2025
39AQI
39AQI
18th August 2025
41AQI
41AQI
19th August 2025
47AQI
47AQI
20th August 2025
51AQI
51AQI
21st August 2025
49AQI
49AQI
22nd August 2025
23rd August 2025
24th August 2025
25th August 2025
26th August 2025
27th August 2025
28th August 2025
29th August 2025
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
31AQI
34AQI
43AQI
38AQI
42AQI
47AQI
48AQI
40AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202541AQI
31
28
24
7
28
2
24
7
21
9
22
9
19
2
197
36
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January31AQI
202437AQI
31
29
25
6
15
15
30
1
16
14
28
3
30
1
26
4
31
27
3
31
319
47
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
December27AQI
202338AQI
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 recorded in
April48AQI
Lowest AQI recorded in
January30AQI
202237AQI
31
21
25
6
14
3
20
11
22
8
17
4
1
27
1
30
1
29
1
31
268
35
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
December27AQI
202134AQI
30
1
24
4
27
2
18
3
25
6
19
11
23
8
26
5
30
31
30
23
306
40
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
January24AQI
202030AQI
12
1
21
17
1
24
6
28
1
14
15
2
19
30
1
27
3
31
223
28
2
Highest AQI recorded in
August55AQI
Lowest AQI recorded in
December19AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
41AQILeast Polluted Year Recorded
2020(Avg.)
30AQIYokomachi's annual 2025 AQI (41) shows an average percentage change of 15.8% (worsened AQI) compared to previous years: 2020 (30), 2021 (34), 2022 (37), 2023 (38), 2024 (37).
