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HistoryAQIPM2.5PM10COSO2NO2O3

Joetsu, 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+

September Air Quality Analysis

Joetsu, Niigata, Japan

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
16th Sep 2022
58AQI
Lowest AQI recorded on
21st Sep 2023
21AQI

Same Day Analysis (23rd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 28 of Good air quality, showing improvement over 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 23rd Sep - 24th Sep 2025

Joetsu, Niigata, Japan

AQI
Day
Night
.

5 AM23rd Sep 2025

6 PM

4 AM24th Sep 2025

Day time
Avg. Highest Time
1PM23rd Sep

28AQI

Avg. Lowest Time
9AM23rd Sep

25AQI

Night time
Avg. Highest Time
8PM23rd Sep

43AQI

Avg. Lowest Time
4AM24th Sep

27AQI

In the last 24 hours,

Joetsu's AQI reached its highest point of 43 at 8 PM during the Night, while the lowest point, 25, was recorded at 9 AM during the Day between 23rd Sep and 24th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025

Joetsu, Niigata, Japan

AugSep
25th - 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 - 23rd23rd - 24th24th
Day
Night
25th Aug 2025515 AMAQI
25th Aug 2025526 AMAQI
25th Aug 2025527 AMAQI
25th Aug 2025528 AMAQI
25th Aug 2025529 AMAQI
25th Aug 20255810 AMAQI
25th Aug 20256011 AMAQI
25th Aug 20255712 PMAQI
25th Aug 2025571 PMAQI
25th Aug 2025502 PMAQI
25th Aug 2025603 PMAQI
25th Aug 2025604 PMAQI
25th Aug 2025535 PMAQI
25th Aug 2025586 PMAQI
25th Aug 2025647 PMAQI
25th Aug 2025588 PMAQI
25th Aug 2025549 PMAQI
25th Aug 20255410 PMAQI
25th Aug 20255811 PMAQI
26th Aug 20255412 AMAQI
26th Aug 2025531 AMAQI
26th Aug 2025512 AMAQI
26th Aug 2025503 AMAQI
26th Aug 2025514 AMAQI

27°C23/30°C

26th Aug 2025525 AMAQI
26th Aug 2025526 AMAQI
26th Aug 2025527 AMAQI
26th Aug 2025518 AMAQI
26th Aug 2025539 AMAQI
26th Aug 20256110 AMAQI
26th Aug 20256211 AMAQI
26th Aug 20256212 PMAQI
26th Aug 2025601 PMAQI
26th Aug 2025572 PMAQI
26th Aug 2025583 PMAQI
26th Aug 2025564 PMAQI
26th Aug 2025605 PMAQI
26th Aug 2025566 PMAQI
26th Aug 2025587 PMAQI
26th Aug 2025568 PMAQI
26th Aug 2025549 PMAQI
26th Aug 20255510 PMAQI
26th Aug 20255611 PMAQI
27th Aug 20255612 AMAQI
27th Aug 2025521 AMAQI
27th Aug 2025502 AMAQI
27th Aug 2025523 AMAQI
27th Aug 2025524 AMAQI

27°C23/31°C

27th Aug 2025535 AMAQI
27th Aug 2025536 AMAQI
27th Aug 2025537 AMAQI
27th Aug 2025548 AMAQI
27th Aug 2025459 AMAQI
27th Aug 20255210 AMAQI
27th Aug 20254211 AMAQI
27th Aug 20255612 PMAQI
27th Aug 2025401 PMAQI
27th Aug 2025422 PMAQI
27th Aug 2025403 PMAQI
27th Aug 2025474 PMAQI
27th Aug 2025495 PMAQI
27th Aug 2025486 PMAQI
27th Aug 2025467 PMAQI
27th Aug 2025388 PMAQI
27th Aug 2025449 PMAQI
27th Aug 20254310 PMAQI
27th Aug 20254211 PMAQI
28th Aug 20254112 AMAQI
28th Aug 2025481 AMAQI
28th Aug 2025522 AMAQI
28th Aug 2025523 AMAQI
28th Aug 2025524 AMAQI

25°C22/29°C

28th Aug 2025525 AMAQI
28th Aug 2025526 AMAQI
28th Aug 2025527 AMAQI
28th Aug 2025528 AMAQI
28th Aug 2025269 AMAQI
28th Aug 20253110 AMAQI
28th Aug 20252511 AMAQI
28th Aug 20252812 PMAQI
28th Aug 2025341 PMAQI
28th Aug 2025262 PMAQI
28th Aug 2025283 PMAQI
28th Aug 2025324 PMAQI
28th Aug 2025315 PMAQI
28th Aug 2025326 PMAQI
28th Aug 2025287 PMAQI
28th Aug 2025438 PMAQI
28th Aug 2025419 PMAQI
28th Aug 20253910 PMAQI
28th Aug 20254211 PMAQI
29th Aug 20253812 AMAQI
29th Aug 2025481 AMAQI
29th Aug 2025512 AMAQI
29th Aug 2025503 AMAQI
29th Aug 2025484 AMAQI

24°C21/28°C

29th Aug 2025475 AMAQI
29th Aug 2025476 AMAQI
29th Aug 2025487 AMAQI
29th Aug 2025468 AMAQI
29th Aug 2025339 AMAQI
29th Aug 20253210 AMAQI
29th Aug 20253811 AMAQI
29th Aug 20254012 PMAQI
29th Aug 2025451 PMAQI
29th Aug 2025502 PMAQI
29th Aug 2025543 PMAQI
29th Aug 2025504 PMAQI
29th Aug 2025575 PMAQI
29th Aug 2025566 PMAQI
29th Aug 2025567 PMAQI
29th Aug 2025508 PMAQI
29th Aug 2025509 PMAQI
29th Aug 20254810 PMAQI
29th Aug 20255111 PMAQI
30th Aug 20254812 AMAQI
30th Aug 2025481 AMAQI
30th Aug 2025462 AMAQI
30th Aug 2025473 AMAQI
30th Aug 2025474 AMAQI

25°C21/29°C

30th Aug 2025495 AMAQI
30th Aug 2025486 AMAQI
30th Aug 2025477 AMAQI
30th Aug 2025498 AMAQI
30th Aug 2025469 AMAQI
30th Aug 20255310 AMAQI
30th Aug 20254811 AMAQI
30th Aug 20255212 PMAQI
30th Aug 2025521 PMAQI
30th Aug 2025452 PMAQI
30th Aug 2025483 PMAQI
30th Aug 2025534 PMAQI
30th Aug 2025505 PMAQI
30th Aug 2025426 PMAQI
30th Aug 2025507 PMAQI
30th Aug 2025498 PMAQI
30th Aug 2025459 PMAQI
30th Aug 20254710 PMAQI
30th Aug 20254611 PMAQI
31st Aug 20254612 AMAQI
31st Aug 2025491 AMAQI
31st Aug 2025482 AMAQI
31st Aug 2025493 AMAQI
31st Aug 2025474 AMAQI

26°C22/30°C

31st Aug 2025495 AMAQI
31st Aug 2025486 AMAQI
31st Aug 2025487 AMAQI
31st Aug 2025508 AMAQI
31st Aug 2025519 AMAQI
31st Aug 20255610 AMAQI
31st Aug 20255411 AMAQI
31st Aug 20255812 PMAQI
31st Aug 2025491 PMAQI
31st Aug 2025482 PMAQI
31st Aug 2025493 PMAQI
31st Aug 2025494 PMAQI
31st Aug 2025495 PMAQI
31st Aug 2025446 PMAQI
31st Aug 2025447 PMAQI
31st Aug 2025448 PMAQI
31st Aug 2025509 PMAQI
31st Aug 20254410 PMAQI
31st Aug 20254811 PMAQI
1st Sep 20254612 AMAQI
1st Sep 2025461 AMAQI
1st Sep 2025472 AMAQI
1st Sep 2025473 AMAQI
1st Sep 2025504 AMAQI

26°C22/30°C

1st Sep 2025505 AMAQI
1st Sep 2025486 AMAQI
1st Sep 2025507 AMAQI
1st Sep 2025518 AMAQI
1st Sep 2025409 AMAQI
1st Sep 20254210 AMAQI
1st Sep 20254211 AMAQI
1st Sep 20254112 PMAQI
1st Sep 2025421 PMAQI
1st Sep 2025392 PMAQI
1st Sep 2025523 PMAQI
1st Sep 2025394 PMAQI
1st Sep 2025405 PMAQI
1st Sep 2025326 PMAQI
1st Sep 2025357 PMAQI
1st Sep 2025368 PMAQI
1st Sep 2025389 PMAQI
1st Sep 20253910 PMAQI
1st Sep 20254311 PMAQI
2nd Sep 20254312 AMAQI
2nd Sep 2025461 AMAQI
2nd Sep 2025462 AMAQI
2nd Sep 2025463 AMAQI
2nd Sep 2025464 AMAQI

27°C23/32°C

2nd Sep 2025445 AMAQI
2nd Sep 2025476 AMAQI
2nd Sep 2025467 AMAQI
2nd Sep 2025458 AMAQI
2nd Sep 2025269 AMAQI
2nd Sep 20253810 AMAQI
2nd Sep 20254011 AMAQI
2nd Sep 20254512 PMAQI
2nd Sep 2025411 PMAQI
2nd Sep 2025292 PMAQI
2nd Sep 2025463 PMAQI
2nd Sep 2025274 PMAQI
2nd Sep 2025295 PMAQI
2nd Sep 2025426 PMAQI
2nd Sep 2025337 PMAQI
2nd Sep 2025398 PMAQI
2nd Sep 2025409 PMAQI
2nd Sep 20253710 PMAQI
2nd Sep 20253611 PMAQI
3rd Sep 20253612 AMAQI
3rd Sep 2025381 AMAQI
3rd Sep 2025432 AMAQI
3rd Sep 2025463 AMAQI
3rd Sep 2025444 AMAQI

27°C23/32°C

3rd Sep 2025425 AMAQI
3rd Sep 2025426 AMAQI
3rd Sep 2025437 AMAQI
3rd Sep 2025428 AMAQI
3rd Sep 2025239 AMAQI
3rd Sep 20252710 AMAQI
3rd Sep 20252811 AMAQI
3rd Sep 20252412 PMAQI
3rd Sep 2025301 PMAQI
3rd Sep 2025242 PMAQI
3rd Sep 2025243 PMAQI
3rd Sep 2025264 PMAQI
3rd Sep 2025265 PMAQI
3rd Sep 2025246 PMAQI
3rd Sep 2025257 PMAQI
3rd Sep 2025298 PMAQI
3rd Sep 2025319 PMAQI
3rd Sep 20253410 PMAQI
3rd Sep 20253111 PMAQI
4th Sep 20253212 AMAQI
4th Sep 2025401 AMAQI
4th Sep 2025442 AMAQI
4th Sep 2025423 AMAQI
4th Sep 2025404 AMAQI

25°C22/28°C

4th Sep 2025405 AMAQI
4th Sep 2025396 AMAQI
4th Sep 2025387 AMAQI
4th Sep 2025398 AMAQI
4th Sep 2025279 AMAQI
4th Sep 20252410 AMAQI
4th Sep 20252111 AMAQI
4th Sep 20252112 PMAQI
4th Sep 2025201 PMAQI
4th Sep 2025232 PMAQI
4th Sep 2025203 PMAQI
4th Sep 2025204 PMAQI
4th Sep 2025365 PMAQI
4th Sep 2025346 PMAQI
4th Sep 2025297 PMAQI
4th Sep 2025288 PMAQI
4th Sep 2025289 PMAQI
4th Sep 20252710 PMAQI
4th Sep 20252311 PMAQI
5th Sep 20251812 AMAQI
5th Sep 2025241 AMAQI
5th Sep 2025372 AMAQI
5th Sep 2025383 AMAQI
5th Sep 2025374 AMAQI

25°C22/29°C

5th Sep 2025365 AMAQI
5th Sep 2025366 AMAQI
5th Sep 2025367 AMAQI
5th Sep 2025358 AMAQI
5th Sep 2025209 AMAQI
5th Sep 20252010 AMAQI
5th Sep 20252111 AMAQI
5th Sep 20251812 PMAQI
5th Sep 2025171 PMAQI
5th Sep 2025192 PMAQI
5th Sep 2025183 PMAQI
5th Sep 2025194 PMAQI
5th Sep 2025215 PMAQI
5th Sep 2025226 PMAQI
5th Sep 2025337 PMAQI
5th Sep 2025288 PMAQI
5th Sep 2025289 PMAQI
5th Sep 20252710 PMAQI
5th Sep 20252911 PMAQI
6th Sep 20252712 AMAQI
6th Sep 2025281 AMAQI
6th Sep 2025282 AMAQI
6th Sep 2025303 AMAQI
6th Sep 2025294 AMAQI

24°C21/26°C

6th Sep 2025295 AMAQI
6th Sep 2025286 AMAQI
6th Sep 2025287 AMAQI
6th Sep 2025288 AMAQI
6th Sep 2025199 AMAQI
6th Sep 20252410 AMAQI
6th Sep 20252511 AMAQI
6th Sep 20252612 PMAQI
6th Sep 2025231 PMAQI
6th Sep 2025202 PMAQI
6th Sep 2025283 PMAQI
6th Sep 2025324 PMAQI
6th Sep 2025285 PMAQI
6th Sep 2025276 PMAQI
6th Sep 2025287 PMAQI
6th Sep 2025308 PMAQI
6th Sep 2025289 PMAQI
6th Sep 20252610 PMAQI
6th Sep 20252811 PMAQI
7th Sep 20252612 AMAQI
7th Sep 2025281 AMAQI
7th Sep 2025282 AMAQI
7th Sep 2025283 AMAQI
7th Sep 2025284 AMAQI

23°C20/27°C

7th Sep 2025265 AMAQI
7th Sep 2025276 AMAQI
7th Sep 2025267 AMAQI
7th Sep 2025278 AMAQI
7th Sep 2025269 AMAQI
7th Sep 20252810 AMAQI
7th Sep 20253311 AMAQI
7th Sep 20252812 PMAQI
7th Sep 2025391 PMAQI
7th Sep 2025352 PMAQI
7th Sep 2025393 PMAQI
7th Sep 2025344 PMAQI
7th Sep 2025355 PMAQI
7th Sep 2025386 PMAQI
7th Sep 2025357 PMAQI
7th Sep 2025368 PMAQI
7th Sep 2025299 PMAQI
7th Sep 20253010 PMAQI
7th Sep 20252911 PMAQI
8th Sep 20252812 AMAQI
8th Sep 2025271 AMAQI
8th Sep 2025282 AMAQI
8th Sep 2025283 AMAQI
8th Sep 2025284 AMAQI

25°C20/30°C

8th Sep 2025275 AMAQI
8th Sep 2025286 AMAQI
8th Sep 2025287 AMAQI
8th Sep 2025288 AMAQI
8th Sep 2025279 AMAQI
8th Sep 20252410 AMAQI
8th Sep 20252911 AMAQI
8th Sep 20253212 PMAQI
8th Sep 2025251 PMAQI
8th Sep 2025302 PMAQI
8th Sep 2025353 PMAQI
8th Sep 2025454 PMAQI
8th Sep 2025405 PMAQI
8th Sep 2025346 PMAQI
8th Sep 2025367 PMAQI
8th Sep 2025318 PMAQI
8th Sep 2025329 PMAQI
8th Sep 20252810 PMAQI
8th Sep 20253011 PMAQI
9th Sep 20252812 AMAQI
9th Sep 2025301 AMAQI
9th Sep 2025282 AMAQI
9th Sep 2025293 AMAQI
9th Sep 2025284 AMAQI

24°C22/27°C

9th Sep 2025305 AMAQI
9th Sep 2025326 AMAQI
9th Sep 2025307 AMAQI
9th Sep 2025308 AMAQI
9th Sep 2025459 AMAQI
9th Sep 20254210 AMAQI
9th Sep 20253711 AMAQI
9th Sep 20254412 PMAQI
9th Sep 2025391 PMAQI
9th Sep 2025402 PMAQI
9th Sep 2025363 PMAQI
9th Sep 2025474 PMAQI
9th Sep 2025435 PMAQI
9th Sep 2025426 PMAQI
9th Sep 2025527 PMAQI
9th Sep 2025408 PMAQI
9th Sep 2025319 PMAQI
9th Sep 20252810 PMAQI
9th Sep 20253211 PMAQI
10th Sep 20252812 AMAQI
10th Sep 2025281 AMAQI
10th Sep 2025302 AMAQI
10th Sep 2025293 AMAQI
10th Sep 2025324 AMAQI

25°C22/28°C

10th Sep 2025335 AMAQI
10th Sep 2025326 AMAQI
10th Sep 2025327 AMAQI
10th Sep 2025328 AMAQI
10th Sep 2025359 AMAQI
10th Sep 20253010 AMAQI
10th Sep 20253111 AMAQI
10th Sep 20253812 PMAQI
10th Sep 2025331 PMAQI
10th Sep 2025262 PMAQI
10th Sep 2025353 PMAQI
10th Sep 2025294 PMAQI
10th Sep 2025225 PMAQI
10th Sep 2025356 PMAQI
10th Sep 2025247 PMAQI
10th Sep 2025328 PMAQI
10th Sep 2025289 PMAQI
10th Sep 20253010 PMAQI
10th Sep 20252811 PMAQI
11th Sep 20252812 AMAQI
11th Sep 2025321 AMAQI
11th Sep 2025332 AMAQI
11th Sep 2025323 AMAQI
11th Sep 2025324 AMAQI

24°C21/27°C

11th Sep 2025345 AMAQI
11th Sep 2025326 AMAQI
11th Sep 2025337 AMAQI
11th Sep 2025328 AMAQI
11th Sep 2025199 AMAQI
11th Sep 20252810 AMAQI
11th Sep 20252011 AMAQI
11th Sep 20252212 PMAQI
11th Sep 2025271 PMAQI
11th Sep 2025222 PMAQI
11th Sep 2025283 PMAQI
11th Sep 2025244 PMAQI
11th Sep 2025225 PMAQI
11th Sep 2025296 PMAQI
11th Sep 2025307 PMAQI
11th Sep 2025328 PMAQI
11th Sep 2025299 PMAQI
11th Sep 20253210 PMAQI
11th Sep 20252811 PMAQI
12th Sep 20253112 AMAQI
12th Sep 2025331 AMAQI
12th Sep 2025332 AMAQI
12th Sep 2025333 AMAQI
12th Sep 2025324 AMAQI

23°C21/26°C

12th Sep 2025325 AMAQI
12th Sep 2025326 AMAQI
12th Sep 2025327 AMAQI
12th Sep 2025308 AMAQI
12th Sep 2025269 AMAQI
12th Sep 20252810 AMAQI
12th Sep 20252611 AMAQI
12th Sep 20252212 PMAQI
12th Sep 2025241 PMAQI
12th Sep 2025332 PMAQI
12th Sep 2025333 PMAQI
12th Sep 2025244 PMAQI
12th Sep 2025255 PMAQI
12th Sep 2025266 PMAQI
12th Sep 2025267 PMAQI
12th Sep 2025238 PMAQI
12th Sep 2025249 PMAQI
12th Sep 20252410 PMAQI
12th Sep 20252711 PMAQI
13th Sep 20252812 AMAQI
13th Sep 2025321 AMAQI
13th Sep 2025332 AMAQI
13th Sep 2025353 AMAQI
13th Sep 2025334 AMAQI

23°C20/27°C

13th Sep 2025345 AMAQI
13th Sep 2025336 AMAQI
13th Sep 2025357 AMAQI
13th Sep 2025338 AMAQI
13th Sep 2025189 AMAQI
13th Sep 20251810 AMAQI
13th Sep 20252411 AMAQI
13th Sep 20252412 PMAQI
13th Sep 2025201 PMAQI
13th Sep 2025182 PMAQI
13th Sep 2025193 PMAQI
13th Sep 2025214 PMAQI
13th Sep 2025195 PMAQI
13th Sep 2025186 PMAQI
13th Sep 2025187 PMAQI
13th Sep 2025248 PMAQI
13th Sep 2025269 PMAQI
13th Sep 20252610 PMAQI
13th Sep 20252811 PMAQI
14th Sep 20253212 AMAQI
14th Sep 2025361 AMAQI
14th Sep 2025352 AMAQI
14th Sep 2025333 AMAQI
14th Sep 2025324 AMAQI

24°C21/29°C

14th Sep 2025325 AMAQI
14th Sep 2025326 AMAQI
14th Sep 2025317 AMAQI
14th Sep 2025328 AMAQI
14th Sep 2025239 AMAQI
14th Sep 20251910 AMAQI
14th Sep 20251611 AMAQI
14th Sep 20251612 PMAQI
14th Sep 2025181 PMAQI
14th Sep 2025182 PMAQI
14th Sep 2025223 PMAQI
14th Sep 2025214 PMAQI
14th Sep 2025245 PMAQI
14th Sep 2025236 PMAQI
14th Sep 2025317 PMAQI
14th Sep 2025298 PMAQI
14th Sep 2025309 PMAQI
14th Sep 20253510 PMAQI
14th Sep 20252911 PMAQI
15th Sep 20252912 AMAQI
15th Sep 2025341 AMAQI
15th Sep 2025342 AMAQI
15th Sep 2025343 AMAQI
15th Sep 2025324 AMAQI

23°C21/24°C

15th Sep 2025315 AMAQI
15th Sep 2025326 AMAQI
15th Sep 2025327 AMAQI
15th Sep 2025328 AMAQI
15th Sep 2025299 AMAQI
15th Sep 20252210 AMAQI
15th Sep 20252611 AMAQI
15th Sep 20253812 PMAQI
15th Sep 2025321 PMAQI
15th Sep 2025202 PMAQI
15th Sep 2025293 PMAQI
15th Sep 2025214 PMAQI
15th Sep 2025215 PMAQI
15th Sep 2025196 PMAQI
15th Sep 2025217 PMAQI
15th Sep 2025268 PMAQI
15th Sep 2025309 PMAQI
15th Sep 20252910 PMAQI
15th Sep 20253211 PMAQI
16th Sep 20252912 AMAQI
16th Sep 2025311 AMAQI
16th Sep 2025332 AMAQI
16th Sep 2025333 AMAQI
16th Sep 2025324 AMAQI

24°C21/27°C

16th Sep 2025325 AMAQI
16th Sep 2025326 AMAQI
16th Sep 2025327 AMAQI
16th Sep 2025328 AMAQI
16th Sep 2025319 AMAQI
16th Sep 20252910 AMAQI
16th Sep 20252811 AMAQI
16th Sep 20253412 PMAQI
16th Sep 2025321 PMAQI
16th Sep 2025342 PMAQI
16th Sep 2025343 PMAQI
16th Sep 2025354 PMAQI
16th Sep 2025405 PMAQI
16th Sep 2025326 PMAQI
16th Sep 2025347 PMAQI
16th Sep 2025338 PMAQI
16th Sep 2025369 PMAQI
16th Sep 20253710 PMAQI
16th Sep 20253411 PMAQI
17th Sep 20253412 AMAQI
17th Sep 2025321 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025323 AMAQI
17th Sep 2025324 AMAQI

25°C22/29°C

17th Sep 2025335 AMAQI
17th Sep 2025336 AMAQI
17th Sep 2025337 AMAQI
17th Sep 2025338 AMAQI
17th Sep 2025399 AMAQI
17th Sep 20254110 AMAQI
17th Sep 20254411 AMAQI
17th Sep 20254812 PMAQI
17th Sep 2025501 PMAQI
17th Sep 2025502 PMAQI
17th Sep 2025403 PMAQI
17th Sep 2025364 PMAQI
17th Sep 2025465 PMAQI
17th Sep 2025356 PMAQI
17th Sep 2025357 PMAQI
17th Sep 2025358 PMAQI
17th Sep 2025349 PMAQI
17th Sep 20253310 PMAQI
17th Sep 20253311 PMAQI
18th Sep 20253412 AMAQI
18th Sep 2025341 AMAQI
18th Sep 2025342 AMAQI
18th Sep 2025343 AMAQI
18th Sep 2025354 AMAQI

25°C21/29°C

18th Sep 2025365 AMAQI
18th Sep 2025366 AMAQI
18th Sep 2025367 AMAQI
18th Sep 2025368 AMAQI
18th Sep 2025319 AMAQI
18th Sep 20253210 AMAQI
18th Sep 20253111 AMAQI
18th Sep 20252512 PMAQI
18th Sep 2025201 PMAQI
18th Sep 2025202 PMAQI
18th Sep 2025183 PMAQI
18th Sep 2025204 PMAQI
18th Sep 2025205 PMAQI
18th Sep 2025176 PMAQI
18th Sep 2025167 PMAQI
18th Sep 2025208 PMAQI
18th Sep 2025279 PMAQI
18th Sep 20252610 PMAQI
18th Sep 20252811 PMAQI
19th Sep 20252812 AMAQI
19th Sep 2025311 AMAQI
19th Sep 2025342 AMAQI
19th Sep 2025343 AMAQI
19th Sep 2025344 AMAQI

21°C19/24°C

19th Sep 2025335 AMAQI
19th Sep 2025346 AMAQI
19th Sep 2025347 AMAQI
19th Sep 2025348 AMAQI
19th Sep 2025219 AMAQI
19th Sep 20251510 AMAQI
19th Sep 20251611 AMAQI
19th Sep 20251812 PMAQI
19th Sep 2025201 PMAQI
19th Sep 2025202 PMAQI
19th Sep 2025223 PMAQI
19th Sep 2025214 PMAQI
19th Sep 2025185 PMAQI
19th Sep 2025206 PMAQI
19th Sep 2025227 PMAQI
19th Sep 2025258 PMAQI
19th Sep 2025299 PMAQI
19th Sep 20252910 PMAQI
19th Sep 20252811 PMAQI
20th Sep 20253012 AMAQI
20th Sep 2025341 AMAQI
20th Sep 2025322 AMAQI
20th Sep 2025323 AMAQI
20th Sep 2025324 AMAQI

21°C19/24°C

20th Sep 2025295 AMAQI
20th Sep 2025296 AMAQI
20th Sep 2025297 AMAQI
20th Sep 2025308 AMAQI
20th Sep 2025279 AMAQI
20th Sep 20251810 AMAQI
20th Sep 20251511 AMAQI
20th Sep 20251812 PMAQI
20th Sep 2025201 PMAQI
20th Sep 2025162 PMAQI
20th Sep 2025183 PMAQI
20th Sep 2025194 PMAQI
20th Sep 2025185 PMAQI
20th Sep 2025176 PMAQI
20th Sep 2025197 PMAQI
20th Sep 2025218 PMAQI
20th Sep 2025259 PMAQI
20th Sep 20252410 PMAQI
20th Sep 20252511 PMAQI
21st Sep 20252512 AMAQI
21st Sep 2025261 AMAQI
21st Sep 2025292 AMAQI
21st Sep 2025303 AMAQI
21st Sep 2025294 AMAQI

22°C19/27°C

21st Sep 2025285 AMAQI
21st Sep 2025286 AMAQI
21st Sep 2025287 AMAQI
21st Sep 2025288 AMAQI
21st Sep 2025209 AMAQI
21st Sep 20251410 AMAQI
21st Sep 20252511 AMAQI
21st Sep 20252712 PMAQI
21st Sep 2025221 PMAQI
21st Sep 2025152 PMAQI
21st Sep 2025243 PMAQI
21st Sep 2025274 PMAQI
21st Sep 2025205 PMAQI
21st Sep 2025246 PMAQI
21st Sep 2025347 PMAQI
21st Sep 2025268 PMAQI
21st Sep 2025289 PMAQI
21st Sep 20252610 PMAQI
21st Sep 20252611 PMAQI
22nd Sep 20252512 AMAQI
22nd Sep 2025261 AMAQI
22nd Sep 2025282 AMAQI
22nd Sep 2025283 AMAQI
22nd Sep 2025284 AMAQI

20°C17/22°C

22nd Sep 2025265 AMAQI
22nd Sep 2025266 AMAQI
22nd Sep 2025267 AMAQI
22nd Sep 2025268 AMAQI
22nd Sep 2025219 AMAQI
22nd Sep 20251710 AMAQI
22nd Sep 20251711 AMAQI
22nd Sep 20251812 PMAQI
22nd Sep 2025181 PMAQI
22nd Sep 2025192 PMAQI
22nd Sep 2025183 PMAQI
22nd Sep 2025184 PMAQI
22nd Sep 2025205 PMAQI
22nd Sep 2025226 PMAQI
22nd Sep 2025237 PMAQI
22nd Sep 2025288 PMAQI
22nd Sep 2025309 PMAQI
22nd Sep 20252810 PMAQI
22nd Sep 20252811 PMAQI
23rd Sep 20252912 AMAQI
23rd Sep 2025281 AMAQI
23rd Sep 2025282 AMAQI
23rd Sep 2025273 AMAQI
23rd Sep 2025264 AMAQI

19°C15/23°C

23rd Sep 2025255 AMAQI
23rd Sep 2025266 AMAQI
23rd Sep 2025267 AMAQI
23rd Sep 2025258 AMAQI
23rd Sep 2025259 AMAQI
23rd Sep 20252710 AMAQI
23rd Sep 20252711 AMAQI
23rd Sep 20252612 PMAQI
23rd Sep 2025281 PMAQI
23rd Sep 2025282 PMAQI
23rd Sep 2025283 PMAQI
23rd Sep 2025274 PMAQI
23rd Sep 2025275 PMAQI
23rd Sep 2025316 PMAQI
23rd Sep 2025377 PMAQI
23rd Sep 2025438 PMAQI
23rd Sep 2025419 PMAQI
23rd Sep 20253210 PMAQI
23rd Sep 20253011 PMAQI
24th Sep 20253312 AMAQI
24th Sep 2025301 AMAQI
24th Sep 2025282 AMAQI
24th Sep 2025273 AMAQI
24th Sep 2025274 AMAQI

20°C16/25°C

24th Sep 2025275 AMAQI
5 AM
24th Sep 2025276 AMAQI
24th Sep 2025277 AMAQI
24th Sep 2025278 AMAQI
24th Sep 2025329 AMAQI
24th Sep 20253310 AMAQI
24th Sep 20253311 AMAQI
11 AM
24th Sep 20253512 PMAQI
24th Sep 2025341 PMAQI
24th Sep 2025362 PMAQI
24th Sep 2025373 PMAQI
24th Sep 2025384 PMAQI
24th Sep 2025485 PMAQI
24th Sep 2025446 PMAQI
6 PM
24th Sep 2025407 PMAQI
24th Sep 2025388 PMAQI
24th Sep 2025349 PMAQI
11 PM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 AM

37AQI

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

31AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 AM (Avg. 37), while the lowest AQI was between 9 AM to 9 AM (Avg. 31).
Night time
Avg. Highest Time
1 AM - 4 AM

37AQI

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

34AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 37), while the lowest AQI was between 12 AM to 12 AM (Avg. 34).

2025 Days Vs Air Quality

Joetsu, Niigata, Japan

2025

82%

218

18%

48

Total number of days with different AQI categories in last 267 days in 2025 (98 days remaining)

Good
218 Days
Moderate
48 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 82%

Health Risk Level:

Low

In 2025, 82% of 267 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

Joetsu, 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
32AQI
2nd January 2025
30AQI
3rd January 2025
28AQI
4th January 2025
27AQI
5th January 2025
27AQI
6th January 2025
31AQI
7th January 2025
31AQI
8th January 2025
29AQI
9th January 2025
30AQI
10th January 2025
29AQI
11th January 2025
28AQI
12th January 2025
31AQI
13th January 2025
29AQI
14th January 2025
35AQI
15th January 2025
28AQI
16th January 2025
29AQI
17th January 2025
29AQI
18th January 2025
28AQI
19th January 2025
30AQI
20th January 2025
33AQI
21st January 2025
40AQI
22nd January 2025
34AQI
23rd January 2025
46AQI
24th January 2025
40AQI
25th January 2025
38AQI
26th January 2025
31AQI
27th January 2025
28AQI
28th January 2025
31AQI
29th January 2025
30AQI
30th January 2025
33AQI
31st January 2025
31AQI
1st February 2025
34AQI
2nd February 2025
31AQI
3rd February 2025
32AQI
4th February 2025
32AQI
5th February 2025
31AQI
6th February 2025
31AQI
7th February 2025
38AQI
8th February 2025
31AQI
9th February 2025
32AQI
10th February 2025
29AQI
11th February 2025
32AQI
12th February 2025
31AQI
13th February 2025
37AQI
14th February 2025
34AQI
15th February 2025
32AQI
16th February 2025
37AQI
17th February 2025
40AQI
18th February 2025
32AQI
19th February 2025
33AQI
20th February 2025
32AQI
21st February 2025
31AQI
22nd February 2025
32AQI
23rd February 2025
33AQI
24th February 2025
33AQI
25th February 2025
35AQI
26th February 2025
44AQI
27th February 2025
51AQI
28th February 2025
52AQI
1st March 2025
55AQI
2nd March 2025
51AQI
3rd March 2025
39AQI
4th March 2025
39AQI
5th March 2025
27AQI
6th March 2025
33AQI
7th March 2025
38AQI
8th March 2025
37AQI
9th March 2025
35AQI
10th March 2025
42AQI
11th March 2025
42AQI
12th March 2025
38AQI
13th March 2025
54AQI
14th March 2025
44AQI
15th March 2025
39AQI
16th March 2025
29AQI
17th March 2025
28AQI
18th March 2025
30AQI
19th March 2025
24AQI
20th March 2025
36AQI
21st March 2025
49AQI
22nd March 2025
52AQI
23rd March 2025
63AQI
24th March 2025
62AQI
25th March 2025
76AQI
26th March 2025
71AQI
27th March 2025
72AQI
28th March 2025
58AQI
29th March 2025
44AQI
30th March 2025
35AQI
31st March 2025
37AQI
1st April 2025
29AQI
2nd April 2025
25AQI
3rd April 2025
22AQI
4th April 2025
24AQI
5th April 2025
34AQI
6th April 2025
32AQI
7th April 2025
37AQI
8th April 2025
42AQI
9th April 2025
32AQI
10th April 2025
42AQI
11th April 2025
42AQI
12th April 2025
44AQI
13th April 2025
31AQI
14th April 2025
36AQI
15th April 2025
26AQI
16th April 2025
38AQI
17th April 2025
44AQI
18th April 2025
54AQI
19th April 2025
59AQI
20th April 2025
49AQI
21st April 2025
43AQI
22nd April 2025
48AQI
23rd April 2025
37AQI
24th April 2025
25AQI
25th April 2025
38AQI
26th April 2025
47AQI
27th April 2025
48AQI
28th April 2025
49AQI
29th April 2025
46AQI
30th April 2025
43AQI
1st May 2025
53AQI
2nd May 2025
33AQI
3rd May 2025
42AQI
4th May 2025
36AQI
5th May 2025
40AQI
6th May 2025
35AQI
7th May 2025
32AQI
8th May 2025
32AQI
9th May 2025
37AQI
10th May 2025
29AQI
11th May 2025
28AQI
12th May 2025
37AQI
13th May 2025
47AQI
14th May 2025
50AQI
15th May 2025
55AQI
16th May 2025
56AQI
17th May 2025
42AQI
18th May 2025
53AQI
19th May 2025
49AQI
20th May 2025
61AQI
21st May 2025
66AQI
22nd May 2025
49AQI
23rd May 2025
50AQI
24th May 2025
46AQI
25th May 2025
34AQI
26th May 2025
34AQI
27th May 2025
39AQI
28th May 2025
37AQI
29th May 2025
40AQI
30th May 2025
33AQI
31st May 2025
30AQI
1st June 2025
30AQI
2nd June 2025
40AQI
3rd June 2025
43AQI
4th June 2025
39AQI
5th June 2025
45AQI
6th June 2025
46AQI
7th June 2025
53AQI
8th June 2025
56AQI
9th June 2025
59AQI
10th June 2025
58AQI
11th June 2025
47AQI
12th June 2025
51AQI
13th June 2025
42AQI
14th June 2025
41AQI
15th June 2025
30AQI
16th June 2025
36AQI
17th June 2025
39AQI
18th June 2025
45AQI
19th June 2025
51AQI
20th June 2025
55AQI
21st June 2025
60AQI
22nd June 2025
69AQI
23rd June 2025
48AQI
24th June 2025
46AQI
25th June 2025
50AQI
26th June 2025
40AQI
27th June 2025
54AQI
28th June 2025
42AQI
29th June 2025
46AQI
30th June 2025
54AQI
1st July 2025
52AQI
2nd July 2025
64AQI
3rd July 2025
66AQI
4th July 2025
70AQI
5th July 2025
68AQI
6th July 2025
58AQI
7th July 2025
60AQI
8th July 2025
59AQI
9th July 2025
55AQI
10th July 2025
48AQI
11th July 2025
47AQI
12th July 2025
46AQI
13th July 2025
49AQI
14th July 2025
43AQI
15th July 2025
38AQI
16th July 2025
45AQI
17th July 2025
33AQI
18th July 2025
36AQI
19th July 2025
36AQI
20th July 2025
38AQI
21st July 2025
38AQI
22nd July 2025
41AQI
23rd July 2025
41AQI
24th July 2025
46AQI
25th July 2025
48AQI
26th July 2025
45AQI
27th July 2025
40AQI
28th July 2025
43AQI
29th July 2025
39AQI
30th July 2025
42AQI
31st July 2025
44AQI
1st August 2025
41AQI
2nd August 2025
41AQI
3rd August 2025
44AQI
4th August 2025
54AQI
5th August 2025
49AQI
6th August 2025
43AQI
7th August 2025
38AQI
8th August 2025
34AQI
9th August 2025
34AQI
10th August 2025
34AQI
11th August 2025
30AQI
12th August 2025
31AQI
13th August 2025
30AQI
14th August 2025
31AQI
15th August 2025
33AQI
16th August 2025
32AQI
17th August 2025
38AQI
18th August 2025
40AQI
19th August 2025
46AQI
20th August 2025
51AQI
21st August 2025
51AQI
22nd August 2025
51AQI
23rd August 2025
52AQI
24th August 2025
54AQI
25th August 2025
55AQI
26th August 2025
55AQI
27th August 2025
48AQI
28th August 2025
40AQI
29th August 2025
48AQI
30th August 2025
48AQI
31st August 2025
48AQI
1st September 2025
43AQI
2nd September 2025
40AQI
3rd September 2025
33AQI
4th September 2025
32AQI
5th September 2025
26AQI
6th September 2025
27AQI
7th September 2025
31AQI
8th September 2025
30AQI
9th September 2025
36AQI
10th September 2025
30AQI
11th September 2025
29AQI
12th September 2025
28AQI
13th September 2025
26AQI
14th September 2025
28AQI
15th September 2025
29AQI
16th September 2025
33AQI
17th September 2025
37AQI
18th September 2025
28AQI
19th September 2025
26AQI
20th September 2025
24AQI
21st September 2025
26AQI
22nd September 2025
24AQI
23rd September 2025
28AQI
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

35AQI

44AQI

39AQI

42AQI

47AQI

48AQI

43AQI

30AQI

No. of days

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

202540AQI

31
26
2
21
10
28
2
25
6
19
11
22
9
23
8
23
218
48

Highest AQI recorded in

July

48AQI

Lowest AQI recorded in

September

30AQI

202439AQI

30
29
25
6
16
14
25
6
12
18
26
5
27
4
30
30
1
28
2
31
309
56

Highest AQI recorded in

June

52AQI

Lowest AQI recorded in

December

27AQI

202341AQI

31
27
1
17
14
17
13
19
12
23
7
21
10
28
3
28
2
31
24
4
31
297
66

Highest AQI recorded in

April

50AQI

Lowest AQI recorded in

December

32AQI

202239AQI

29
2
20
1
24
7
19
11
17
14
19
11
20
4
1
25
3
30
1
28
2
31
263
56

Highest AQI recorded in

May

50AQI

Lowest AQI recorded in

December

30AQI

202137AQI

29
2
23
5
25
4
16
5
24
5
2
20
10
27
4
23
8
30
30
1
30
23
300
44
2

Highest AQI recorded in

June

48AQI

Lowest AQI recorded in

December

27AQI

202034AQI

12
1
21
15
3
23
7
28
1
13
16
2
18
1
29
2
26
4
31
216
35
2

Highest AQI recorded in

August

54AQI

Lowest AQI recorded in

December

21AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
41AQI
Least Polluted Year Recorded
2020(Avg.)
34AQI

Joetsu's annual 2025 AQI (40) shows an average percentage change of 6.2% (worsened AQI) compared to previous years: 2020 (34), 2021 (37), 2022 (39), 2023 (41), 2024 (39).