Koyo, Nagoya, 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+
August Air Quality Analysis
Koyo, Nagoya, Aichi, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
4th Aug 2025
64AQILowest AQI recorded on
27th Aug 2024
11AQISame Day Analysis (10th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 42 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 11th Aug - 12th Aug 2025
Koyo, Nagoya, Aichi, Japan
AQI
Day
Night
.
4 AM11th Aug 2025
7 PM
3 AM12th Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
4AM11th Aug
46AQI
Avg. Lowest Time
2PM11th Aug
22AQI
In the last 24 hours,
Koyo's AQI reached its highest point of 46 at 4 AM during the Night, while the lowest point, undefined, was recorded at 3 AM during the Night between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Koyo, Nagoya, Aichi, Japan
JulAug
13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th
Day
Night
13th Jul 2025624 AMAQI
13th Jul 2025605 AMAQI
13th Jul 2025606 AMAQI
13th Jul 2025607 AMAQI
13th Jul 2025608 AMAQI
13th Jul 2025459 AMAQI
13th Jul 20253510 AMAQI
13th Jul 20254311 AMAQI
13th Jul 20255112 PMAQI
13th Jul 2025511 PMAQI
13th Jul 2025502 PMAQI
13th Jul 2025463 PMAQI
13th Jul 2025434 PMAQI
13th Jul 2025435 PMAQI
13th Jul 2025386 PMAQI
13th Jul 2025377 PMAQI
13th Jul 2025448 PMAQI
13th Jul 2025529 PMAQI
13th Jul 20255310 PMAQI
13th Jul 20255311 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025561 AMAQI
14th Jul 2025612 AMAQI
14th Jul 2025603 AMAQI
28°C26/31°C
14th Jul 2025604 AMAQI
14th Jul 2025585 AMAQI
14th Jul 2025586 AMAQI
14th Jul 2025587 AMAQI
14th Jul 2025588 AMAQI
14th Jul 2025369 AMAQI
14th Jul 20253210 AMAQI
14th Jul 20253311 AMAQI
14th Jul 20252712 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025222 PMAQI
14th Jul 2025223 PMAQI
14th Jul 2025204 PMAQI
14th Jul 2025195 PMAQI
14th Jul 2025236 PMAQI
14th Jul 2025227 PMAQI
14th Jul 2025298 PMAQI
14th Jul 2025499 PMAQI
14th Jul 20255110 PMAQI
14th Jul 20255011 PMAQI
15th Jul 20254912 AMAQI
15th Jul 2025521 AMAQI
15th Jul 2025582 AMAQI
15th Jul 2025583 AMAQI
28°C25/31°C
15th Jul 2025574 AMAQI
15th Jul 2025545 AMAQI
15th Jul 2025546 AMAQI
15th Jul 2025547 AMAQI
15th Jul 2025558 AMAQI
15th Jul 2025319 AMAQI
15th Jul 20252210 AMAQI
15th Jul 20252811 AMAQI
15th Jul 20254012 PMAQI
15th Jul 2025511 PMAQI
15th Jul 2025522 PMAQI
15th Jul 2025513 PMAQI
15th Jul 2025464 PMAQI
15th Jul 2025405 PMAQI
15th Jul 2025426 PMAQI
15th Jul 2025447 PMAQI
15th Jul 2025498 PMAQI
15th Jul 2025539 PMAQI
15th Jul 20255210 PMAQI
15th Jul 20255211 PMAQI
16th Jul 20255412 AMAQI
16th Jul 2025561 AMAQI
16th Jul 2025552 AMAQI
16th Jul 2025553 AMAQI
28°C26/31°C
16th Jul 2025544 AMAQI
16th Jul 2025535 AMAQI
16th Jul 2025536 AMAQI
16th Jul 2025537 AMAQI
16th Jul 2025538 AMAQI
16th Jul 2025549 AMAQI
16th Jul 20255510 AMAQI
16th Jul 20254911 AMAQI
16th Jul 20254912 PMAQI
16th Jul 2025481 PMAQI
16th Jul 2025422 PMAQI
16th Jul 2025443 PMAQI
16th Jul 2025424 PMAQI
16th Jul 2025365 PMAQI
16th Jul 2025346 PMAQI
16th Jul 2025307 PMAQI
16th Jul 2025328 PMAQI
16th Jul 2025449 PMAQI
16th Jul 20254410 PMAQI
16th Jul 20254311 PMAQI
17th Jul 20254312 AMAQI
17th Jul 2025471 AMAQI
17th Jul 2025542 AMAQI
17th Jul 2025543 AMAQI
27°C25/30°C
17th Jul 2025544 AMAQI
17th Jul 2025535 AMAQI
17th Jul 2025536 AMAQI
17th Jul 2025537 AMAQI
17th Jul 2025538 AMAQI
17th Jul 2025279 AMAQI
17th Jul 20251610 AMAQI
17th Jul 20251711 AMAQI
17th Jul 20252512 PMAQI
17th Jul 2025321 PMAQI
17th Jul 2025372 PMAQI
17th Jul 2025403 PMAQI
17th Jul 2025434 PMAQI
17th Jul 2025485 PMAQI
17th Jul 2025526 PMAQI
17th Jul 2025467 PMAQI
17th Jul 2025398 PMAQI
17th Jul 2025439 PMAQI
17th Jul 20254410 PMAQI
17th Jul 20254511 PMAQI
18th Jul 20254612 AMAQI
18th Jul 2025491 AMAQI
18th Jul 2025522 AMAQI
18th Jul 2025523 AMAQI
25°C24/26°C
18th Jul 2025504 AMAQI
18th Jul 2025485 AMAQI
18th Jul 2025486 AMAQI
18th Jul 2025487 AMAQI
18th Jul 2025488 AMAQI
18th Jul 2025329 AMAQI
18th Jul 20252310 AMAQI
18th Jul 20252511 AMAQI
18th Jul 20252412 PMAQI
18th Jul 2025251 PMAQI
18th Jul 2025252 PMAQI
18th Jul 2025243 PMAQI
18th Jul 2025204 PMAQI
18th Jul 2025245 PMAQI
18th Jul 2025276 PMAQI
18th Jul 2025267 PMAQI
18th Jul 2025318 PMAQI
18th Jul 2025419 PMAQI
18th Jul 20254110 PMAQI
18th Jul 20254011 PMAQI
19th Jul 20254012 AMAQI
19th Jul 2025441 AMAQI
19th Jul 2025502 AMAQI
19th Jul 2025503 AMAQI
26°C23/30°C
19th Jul 2025474 AMAQI
19th Jul 2025455 AMAQI
19th Jul 2025446 AMAQI
19th Jul 2025447 AMAQI
19th Jul 2025458 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20251810 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252712 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025303 PMAQI
19th Jul 2025264 PMAQI
19th Jul 2025265 PMAQI
19th Jul 2025246 PMAQI
19th Jul 2025237 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025359 PMAQI
19th Jul 20253610 PMAQI
19th Jul 20253611 PMAQI
20th Jul 20253612 AMAQI
20th Jul 2025381 AMAQI
20th Jul 2025462 AMAQI
20th Jul 2025463 AMAQI
27°C24/30°C
20th Jul 2025444 AMAQI
20th Jul 2025425 AMAQI
20th Jul 2025426 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025428 AMAQI
20th Jul 2025309 AMAQI
20th Jul 20252110 AMAQI
20th Jul 20252211 AMAQI
20th Jul 20253012 PMAQI
20th Jul 2025371 PMAQI
20th Jul 2025382 PMAQI
20th Jul 2025353 PMAQI
20th Jul 2025314 PMAQI
20th Jul 2025255 PMAQI
20th Jul 2025206 PMAQI
20th Jul 2025207 PMAQI
20th Jul 2025268 PMAQI
20th Jul 2025349 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253311 PMAQI
21st Jul 20253212 AMAQI
21st Jul 2025361 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025423 AMAQI
28°C25/31°C
21st Jul 2025404 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025387 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025279 AMAQI
21st Jul 20252410 AMAQI
21st Jul 20253011 AMAQI
21st Jul 20254012 PMAQI
21st Jul 2025451 PMAQI
21st Jul 2025472 PMAQI
21st Jul 2025423 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025315 PMAQI
21st Jul 2025306 PMAQI
21st Jul 2025327 PMAQI
21st Jul 2025328 PMAQI
21st Jul 2025329 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253212 AMAQI
22nd Jul 2025321 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025383 AMAQI
29°C26/32°C
22nd Jul 2025384 AMAQI
22nd Jul 2025375 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025387 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025249 AMAQI
22nd Jul 20252310 AMAQI
22nd Jul 20252611 AMAQI
22nd Jul 20252912 PMAQI
22nd Jul 2025341 PMAQI
22nd Jul 2025442 PMAQI
22nd Jul 2025533 PMAQI
22nd Jul 2025564 PMAQI
22nd Jul 2025485 PMAQI
22nd Jul 2025366 PMAQI
22nd Jul 2025277 PMAQI
22nd Jul 2025238 PMAQI
22nd Jul 2025289 PMAQI
22nd Jul 20252810 PMAQI
22nd Jul 20252611 PMAQI
23rd Jul 20252512 AMAQI
23rd Jul 2025301 AMAQI
23rd Jul 2025372 AMAQI
23rd Jul 2025363 AMAQI
29°C26/33°C
23rd Jul 2025374 AMAQI
23rd Jul 2025365 AMAQI
23rd Jul 2025366 AMAQI
23rd Jul 2025367 AMAQI
23rd Jul 2025368 AMAQI
23rd Jul 2025329 AMAQI
23rd Jul 20252610 AMAQI
23rd Jul 20254111 AMAQI
23rd Jul 20254912 PMAQI
23rd Jul 2025531 PMAQI
23rd Jul 2025552 PMAQI
23rd Jul 2025533 PMAQI
23rd Jul 2025504 PMAQI
23rd Jul 2025395 PMAQI
23rd Jul 2025346 PMAQI
23rd Jul 2025327 PMAQI
23rd Jul 2025298 PMAQI
23rd Jul 2025289 PMAQI
23rd Jul 20252510 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252812 AMAQI
24th Jul 2025311 AMAQI
24th Jul 2025352 AMAQI
24th Jul 2025343 AMAQI
29°C26/33°C
24th Jul 2025364 AMAQI
24th Jul 2025385 AMAQI
24th Jul 2025386 AMAQI
24th Jul 2025387 AMAQI
24th Jul 2025378 AMAQI
24th Jul 2025249 AMAQI
24th Jul 20252310 AMAQI
24th Jul 20252411 AMAQI
24th Jul 20253412 PMAQI
24th Jul 2025461 PMAQI
24th Jul 2025532 PMAQI
24th Jul 2025553 PMAQI
24th Jul 2025564 PMAQI
24th Jul 2025535 PMAQI
24th Jul 2025416 PMAQI
24th Jul 2025267 PMAQI
24th Jul 2025238 PMAQI
24th Jul 2025259 PMAQI
24th Jul 20252510 PMAQI
24th Jul 20252411 PMAQI
25th Jul 20252612 AMAQI
25th Jul 2025291 AMAQI
25th Jul 2025342 AMAQI
25th Jul 2025343 AMAQI
29°C26/33°C
25th Jul 2025344 AMAQI
25th Jul 2025355 AMAQI
25th Jul 2025366 AMAQI
25th Jul 2025367 AMAQI
25th Jul 2025348 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20252910 AMAQI
25th Jul 20252811 AMAQI
25th Jul 20253612 PMAQI
25th Jul 2025461 PMAQI
25th Jul 2025362 PMAQI
25th Jul 2025263 PMAQI
25th Jul 2025204 PMAQI
25th Jul 2025185 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025177 PMAQI
25th Jul 2025198 PMAQI
25th Jul 2025249 PMAQI
25th Jul 20252510 PMAQI
25th Jul 20252411 PMAQI
26th Jul 20252612 AMAQI
26th Jul 2025281 AMAQI
26th Jul 2025322 AMAQI
26th Jul 2025323 AMAQI
29°C27/32°C
26th Jul 2025334 AMAQI
26th Jul 2025345 AMAQI
26th Jul 2025336 AMAQI
26th Jul 2025337 AMAQI
26th Jul 2025328 AMAQI
26th Jul 2025219 AMAQI
26th Jul 20252010 AMAQI
26th Jul 20252211 AMAQI
26th Jul 20252412 PMAQI
26th Jul 2025261 PMAQI
26th Jul 2025282 PMAQI
26th Jul 2025233 PMAQI
26th Jul 2025204 PMAQI
26th Jul 2025185 PMAQI
26th Jul 2025186 PMAQI
26th Jul 2025187 PMAQI
26th Jul 2025248 PMAQI
26th Jul 2025269 PMAQI
26th Jul 20252410 PMAQI
26th Jul 20252611 PMAQI
27th Jul 20252612 AMAQI
27th Jul 2025281 AMAQI
27th Jul 2025322 AMAQI
27th Jul 2025313 AMAQI
29°C26/32°C
27th Jul 2025314 AMAQI
27th Jul 2025305 AMAQI
27th Jul 2025306 AMAQI
27th Jul 2025297 AMAQI
27th Jul 2025308 AMAQI
27th Jul 2025249 AMAQI
27th Jul 20251710 AMAQI
27th Jul 20251711 AMAQI
27th Jul 20252312 PMAQI
27th Jul 2025301 PMAQI
27th Jul 2025362 PMAQI
27th Jul 2025303 PMAQI
27th Jul 2025264 PMAQI
27th Jul 2025235 PMAQI
27th Jul 2025236 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025248 PMAQI
27th Jul 2025259 PMAQI
27th Jul 20252410 PMAQI
27th Jul 20252311 PMAQI
28th Jul 20252212 AMAQI
28th Jul 2025251 AMAQI
28th Jul 2025302 AMAQI
28th Jul 2025293 AMAQI
29°C26/32°C
28th Jul 2025294 AMAQI
28th Jul 2025285 AMAQI
28th Jul 2025286 AMAQI
28th Jul 2025287 AMAQI
28th Jul 2025288 AMAQI
28th Jul 2025219 AMAQI
28th Jul 20252010 AMAQI
28th Jul 20252311 AMAQI
28th Jul 20253212 PMAQI
28th Jul 2025391 PMAQI
28th Jul 2025422 PMAQI
28th Jul 2025433 PMAQI
28th Jul 2025424 PMAQI
28th Jul 2025295 PMAQI
28th Jul 2025256 PMAQI
28th Jul 2025317 PMAQI
28th Jul 2025348 PMAQI
28th Jul 2025329 PMAQI
28th Jul 20253110 PMAQI
28th Jul 20252911 PMAQI
29th Jul 20252712 AMAQI
29th Jul 2025241 AMAQI
29th Jul 2025272 AMAQI
29th Jul 2025263 AMAQI
29°C26/32°C
29th Jul 2025284 AMAQI
29th Jul 2025285 AMAQI
29th Jul 2025276 AMAQI
29th Jul 2025287 AMAQI
29th Jul 2025288 AMAQI
29th Jul 2025229 AMAQI
29th Jul 20252810 AMAQI
29th Jul 20254111 AMAQI
29th Jul 20255012 PMAQI
29th Jul 2025501 PMAQI
29th Jul 2025522 PMAQI
29th Jul 2025543 PMAQI
29th Jul 2025564 PMAQI
29th Jul 2025585 PMAQI
29th Jul 2025566 PMAQI
29th Jul 2025487 PMAQI
29th Jul 2025348 PMAQI
29th Jul 2025309 PMAQI
29th Jul 20252910 PMAQI
29th Jul 20252811 PMAQI
30th Jul 20252612 AMAQI
30th Jul 2025271 AMAQI
30th Jul 2025282 AMAQI
30th Jul 2025283 AMAQI
30°C27/35°C
30th Jul 2025294 AMAQI
30th Jul 2025315 AMAQI
30th Jul 2025316 AMAQI
30th Jul 2025317 AMAQI
30th Jul 2025318 AMAQI
30th Jul 2025299 AMAQI
30th Jul 20252910 AMAQI
30th Jul 20253711 AMAQI
30th Jul 20254712 PMAQI
30th Jul 2025601 PMAQI
30th Jul 2025672 PMAQI
30th Jul 2025683 PMAQI
30th Jul 2025624 PMAQI
30th Jul 2025585 PMAQI
30th Jul 2025506 PMAQI
30th Jul 2025427 PMAQI
30th Jul 2025358 PMAQI
30th Jul 2025329 PMAQI
30th Jul 20253310 PMAQI
30th Jul 20253411 PMAQI
31st Jul 20253312 AMAQI
31st Jul 2025301 AMAQI
31st Jul 2025292 AMAQI
31st Jul 2025293 AMAQI
30°C27/34°C
31st Jul 2025284 AMAQI
31st Jul 2025285 AMAQI
31st Jul 2025286 AMAQI
31st Jul 2025287 AMAQI
31st Jul 2025288 AMAQI
31st Jul 2025289 AMAQI
31st Jul 20252810 AMAQI
31st Jul 20254111 AMAQI
31st Jul 20255312 PMAQI
31st Jul 2025511 PMAQI
31st Jul 2025522 PMAQI
31st Jul 2025553 PMAQI
31st Jul 2025564 PMAQI
31st Jul 2025555 PMAQI
31st Jul 2025546 PMAQI
31st Jul 2025507 PMAQI
31st Jul 2025398 PMAQI
31st Jul 2025409 PMAQI
31st Jul 20253910 PMAQI
31st Jul 20253911 PMAQI
1st Aug 20253212 AMAQI
1st Aug 2025311 AMAQI
1st Aug 2025312 AMAQI
1st Aug 2025313 AMAQI
30°C27/33°C
1st Aug 2025344 AMAQI
1st Aug 2025365 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025397 AMAQI
1st Aug 2025368 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20253910 AMAQI
1st Aug 20254611 AMAQI
1st Aug 20254912 PMAQI
1st Aug 2025441 PMAQI
1st Aug 2025542 PMAQI
1st Aug 2025593 PMAQI
1st Aug 2025614 PMAQI
1st Aug 2025625 PMAQI
1st Aug 2025606 PMAQI
1st Aug 2025667 PMAQI
1st Aug 2025558 PMAQI
1st Aug 2025429 PMAQI
1st Aug 20253910 PMAQI
1st Aug 20254011 PMAQI
2nd Aug 20253812 AMAQI
2nd Aug 2025341 AMAQI
2nd Aug 2025352 AMAQI
2nd Aug 2025353 AMAQI
31°C27/36°C
2nd Aug 2025374 AMAQI
2nd Aug 2025405 AMAQI
2nd Aug 2025396 AMAQI
2nd Aug 2025387 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025509 AMAQI
2nd Aug 20255110 AMAQI
2nd Aug 20254611 AMAQI
2nd Aug 20254812 PMAQI
2nd Aug 2025491 PMAQI
2nd Aug 2025542 PMAQI
2nd Aug 2025543 PMAQI
2nd Aug 2025584 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025516 PMAQI
2nd Aug 2025527 PMAQI
2nd Aug 2025468 PMAQI
2nd Aug 2025409 PMAQI
2nd Aug 20253810 PMAQI
2nd Aug 20254511 PMAQI
3rd Aug 20254512 AMAQI
3rd Aug 2025391 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025383 AMAQI
31°C27/35°C
3rd Aug 2025404 AMAQI
3rd Aug 2025425 AMAQI
3rd Aug 2025406 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025449 AMAQI
3rd Aug 20255410 AMAQI
3rd Aug 20255611 AMAQI
3rd Aug 20255812 PMAQI
3rd Aug 2025571 PMAQI
3rd Aug 2025582 PMAQI
3rd Aug 2025503 PMAQI
3rd Aug 2025524 PMAQI
3rd Aug 2025475 PMAQI
3rd Aug 2025496 PMAQI
3rd Aug 2025477 PMAQI
3rd Aug 2025468 PMAQI
3rd Aug 2025439 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254311 PMAQI
4th Aug 20254012 AMAQI
4th Aug 2025401 AMAQI
4th Aug 2025402 AMAQI
4th Aug 2025403 AMAQI
31°C28/35°C
4th Aug 2025444 AMAQI
4th Aug 2025445 AMAQI
4th Aug 2025446 AMAQI
4th Aug 2025447 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025689 AMAQI
4th Aug 20258010 AMAQI
4th Aug 20259011 AMAQI
4th Aug 20258312 PMAQI
4th Aug 2025861 PMAQI
4th Aug 2025912 PMAQI
4th Aug 2025963 PMAQI
4th Aug 2025884 PMAQI
4th Aug 2025975 PMAQI
4th Aug 2025946 PMAQI
4th Aug 2025797 PMAQI
4th Aug 2025698 PMAQI
4th Aug 2025579 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20254711 PMAQI
5th Aug 20255112 AMAQI
5th Aug 2025461 AMAQI
5th Aug 2025422 AMAQI
5th Aug 2025413 AMAQI
31°C28/35°C
5th Aug 2025524 AMAQI
5th Aug 2025565 AMAQI
5th Aug 2025566 AMAQI
5th Aug 2025567 AMAQI
5th Aug 2025558 AMAQI
5th Aug 2025609 AMAQI
5th Aug 20256410 AMAQI
5th Aug 20256011 AMAQI
5th Aug 20256212 PMAQI
5th Aug 2025601 PMAQI
5th Aug 2025512 PMAQI
5th Aug 2025483 PMAQI
5th Aug 2025544 PMAQI
5th Aug 2025495 PMAQI
5th Aug 2025506 PMAQI
5th Aug 2025517 PMAQI
5th Aug 2025508 PMAQI
5th Aug 2025529 PMAQI
5th Aug 20255010 PMAQI
5th Aug 20254511 PMAQI
6th Aug 20255012 AMAQI
6th Aug 2025521 AMAQI
6th Aug 2025522 AMAQI
6th Aug 2025503 AMAQI
31°C28/34°C
6th Aug 2025534 AMAQI
6th Aug 2025525 AMAQI
6th Aug 2025536 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025528 AMAQI
6th Aug 2025479 AMAQI
6th Aug 20254110 AMAQI
6th Aug 20255311 AMAQI
6th Aug 20255612 PMAQI
6th Aug 2025521 PMAQI
6th Aug 2025462 PMAQI
6th Aug 2025363 PMAQI
6th Aug 2025554 PMAQI
6th Aug 2025585 PMAQI
6th Aug 2025596 PMAQI
6th Aug 2025587 PMAQI
6th Aug 2025568 PMAQI
6th Aug 2025529 PMAQI
6th Aug 20255410 PMAQI
6th Aug 20255411 PMAQI
7th Aug 20255412 AMAQI
7th Aug 2025481 AMAQI
7th Aug 2025522 AMAQI
7th Aug 2025523 AMAQI
32°C28/36°C
7th Aug 2025524 AMAQI
7th Aug 2025525 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025487 AMAQI
7th Aug 2025528 AMAQI
7th Aug 2025509 AMAQI
7th Aug 20255210 AMAQI
7th Aug 20255311 AMAQI
7th Aug 20254712 PMAQI
7th Aug 2025401 PMAQI
7th Aug 2025352 PMAQI
7th Aug 2025343 PMAQI
7th Aug 2025314 PMAQI
7th Aug 2025345 PMAQI
7th Aug 2025336 PMAQI
7th Aug 2025397 PMAQI
7th Aug 2025448 PMAQI
7th Aug 2025479 PMAQI
7th Aug 20254710 PMAQI
7th Aug 20254811 PMAQI
8th Aug 20254812 AMAQI
8th Aug 2025501 AMAQI
8th Aug 2025522 AMAQI
8th Aug 2025523 AMAQI
29°C27/32°C
8th Aug 2025524 AMAQI
8th Aug 2025515 AMAQI
8th Aug 2025516 AMAQI
8th Aug 2025517 AMAQI
8th Aug 2025518 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20252810 AMAQI
8th Aug 20252611 AMAQI
8th Aug 20252612 PMAQI
8th Aug 2025251 PMAQI
8th Aug 2025262 PMAQI
8th Aug 2025273 PMAQI
8th Aug 2025264 PMAQI
8th Aug 2025265 PMAQI
8th Aug 2025266 PMAQI
8th Aug 2025257 PMAQI
8th Aug 2025338 PMAQI
8th Aug 2025419 PMAQI
8th Aug 20254010 PMAQI
8th Aug 20254111 PMAQI
9th Aug 20254112 AMAQI
9th Aug 2025451 AMAQI
9th Aug 2025512 AMAQI
9th Aug 2025513 AMAQI
29°C25/33°C
9th Aug 2025504 AMAQI
9th Aug 2025475 AMAQI
9th Aug 2025476 AMAQI
9th Aug 2025477 AMAQI
9th Aug 2025478 AMAQI
9th Aug 2025349 AMAQI
9th Aug 20253210 AMAQI
9th Aug 20253211 AMAQI
9th Aug 20253512 PMAQI
9th Aug 2025401 PMAQI
9th Aug 2025402 PMAQI
9th Aug 2025503 PMAQI
9th Aug 2025604 PMAQI
9th Aug 2025605 PMAQI
9th Aug 2025556 PMAQI
9th Aug 2025547 PMAQI
9th Aug 2025518 PMAQI
9th Aug 2025499 PMAQI
9th Aug 20255510 PMAQI
9th Aug 20255811 PMAQI
10th Aug 20255012 AMAQI
10th Aug 2025481 AMAQI
10th Aug 2025482 AMAQI
10th Aug 2025483 AMAQI
29°C25/32°C
10th Aug 2025474 AMAQI
10th Aug 2025465 AMAQI
10th Aug 2025466 AMAQI
10th Aug 2025467 AMAQI
10th Aug 2025468 AMAQI
10th Aug 2025409 AMAQI
10th Aug 20253410 AMAQI
10th Aug 20252911 AMAQI
10th Aug 20252812 PMAQI
10th Aug 2025301 PMAQI
10th Aug 2025282 PMAQI
10th Aug 2025243 PMAQI
10th Aug 2025254 PMAQI
10th Aug 2025325 PMAQI
10th Aug 2025386 PMAQI
10th Aug 2025377 PMAQI
10th Aug 2025448 PMAQI
10th Aug 2025489 PMAQI
10th Aug 20254710 PMAQI
10th Aug 20254611 PMAQI
11th Aug 20254312 AMAQI
11th Aug 2025441 AMAQI
11th Aug 2025482 AMAQI
11th Aug 2025483 AMAQI
25°C24/25°C
11th Aug 2025464 AMAQI
11th Aug 2025455 AMAQI
11th Aug 2025446 AMAQI
11th Aug 2025457 AMAQI
11th Aug 2025448 AMAQI
11th Aug 2025339 AMAQI
11th Aug 20252910 AMAQI
11th Aug 20252611 AMAQI
11th Aug 20252412 PMAQI
11th Aug 2025231 PMAQI
11th Aug 2025222 PMAQI
11th Aug 2025283 PMAQI
11th Aug 2025254 PMAQI
11th Aug 2025335 PMAQI
11th Aug 2025366 PMAQI
11th Aug 2025297 PMAQI
11th Aug 2025368 PMAQI
11th Aug 2025329 PMAQI
11th Aug 20253310 PMAQI
11th Aug 20253211 PMAQI
12th Aug 20253812 AMAQI
12th Aug 2025441 AMAQI
12th Aug 2025462 AMAQI
--°C/°C
4 AM
11 AM
7 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
1 PM - 7 PM
42AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
10 AM
33AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 7 PM (Avg. 42), while the lowest AQI was between 10 AM to 10 AM (Avg. 33).
Night time
Avg. Highest Time
2 AM - 3 AM
43AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
8 PM
37AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 3 AM (Avg. 43), while the lowest AQI was between 8 PM to 8 PM (Avg. 37).
2025 Days Vs Air Quality
Koyo, Nagoya, Aichi, Japan
2025
91%
203
9%
19
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
203 DaysModerate
19 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 223 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Koyo, Nagoya, Aichi, 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.
1st January 2025
26AQI
26AQI
2nd January 2025
28AQI
28AQI
3rd January 2025
28AQI
28AQI
4th January 2025
26AQI
26AQI
5th January 2025
25AQI
25AQI
6th January 2025
22AQI
22AQI
7th January 2025
25AQI
25AQI
8th January 2025
24AQI
24AQI
9th January 2025
25AQI
25AQI
10th January 2025
21AQI
21AQI
11th January 2025
23AQI
23AQI
12th January 2025
22AQI
22AQI
13th January 2025
25AQI
25AQI
14th January 2025
28AQI
28AQI
15th January 2025
29AQI
29AQI
16th January 2025
24AQI
24AQI
17th January 2025
26AQI
26AQI
18th January 2025
24AQI
24AQI
19th January 2025
26AQI
26AQI
20th January 2025
26AQI
26AQI
21st January 2025
31AQI
31AQI
22nd January 2025
30AQI
30AQI
23rd January 2025
34AQI
34AQI
24th January 2025
35AQI
35AQI
25th January 2025
35AQI
35AQI
26th January 2025
32AQI
32AQI
27th January 2025
25AQI
25AQI
28th January 2025
28AQI
28AQI
29th January 2025
29AQI
29AQI
30th January 2025
28AQI
28AQI
31st January 2025
31AQI
31AQI
1st February 2025
34AQI
34AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
29AQI
29AQI
4th February 2025
28AQI
28AQI
5th February 2025
29AQI
29AQI
6th February 2025
28AQI
28AQI
7th February 2025
28AQI
28AQI
8th February 2025
28AQI
28AQI
9th February 2025
27AQI
27AQI
10th February 2025
28AQI
28AQI
11th February 2025
29AQI
29AQI
12th February 2025
22AQI
22AQI
13th February 2025
31AQI
31AQI
14th February 2025
28AQI
28AQI
15th February 2025
31AQI
31AQI
16th February 2025
30AQI
30AQI
17th February 2025
30AQI
30AQI
18th February 2025
29AQI
29AQI
19th February 2025
29AQI
29AQI
20th February 2025
28AQI
28AQI
21st February 2025
29AQI
29AQI
22nd February 2025
30AQI
30AQI
23rd February 2025
31AQI
31AQI
24th February 2025
32AQI
32AQI
25th February 2025
28AQI
28AQI
26th February 2025
34AQI
34AQI
27th February 2025
36AQI
36AQI
28th February 2025
34AQI
34AQI
1st March 2025
36AQI
36AQI
2nd March 2025
35AQI
35AQI
3rd March 2025
34AQI
34AQI
4th March 2025
23AQI
23AQI
5th March 2025
24AQI
24AQI
6th March 2025
31AQI
31AQI
7th March 2025
31AQI
31AQI
8th March 2025
28AQI
28AQI
9th March 2025
35AQI
35AQI
10th March 2025
31AQI
31AQI
11th March 2025
27AQI
27AQI
12th March 2025
24AQI
24AQI
13th March 2025
32AQI
32AQI
14th March 2025
20AQI
20AQI
15th March 2025
19AQI
19AQI
16th March 2025
17AQI
17AQI
17th March 2025
15AQI
15AQI
18th March 2025
15AQI
15AQI
19th March 2025
14AQI
14AQI
20th March 2025
18AQI
18AQI
21st March 2025
29AQI
29AQI
22nd March 2025
33AQI
33AQI
23rd March 2025
39AQI
39AQI
24th March 2025
41AQI
41AQI
25th March 2025
53AQI
53AQI
26th March 2025
78AQI
78AQI
27th March 2025
67AQI
67AQI
28th March 2025
42AQI
42AQI
29th March 2025
35AQI
35AQI
30th March 2025
33AQI
33AQI
31st March 2025
37AQI
37AQI
1st April 2025
24AQI
24AQI
2nd April 2025
25AQI
25AQI
3rd April 2025
17AQI
17AQI
4th April 2025
18AQI
18AQI
5th April 2025
20AQI
20AQI
6th April 2025
18AQI
18AQI
7th April 2025
21AQI
21AQI
8th April 2025
23AQI
23AQI
9th April 2025
19AQI
19AQI
10th April 2025
25AQI
25AQI
11th April 2025
25AQI
25AQI
12th April 2025
25AQI
25AQI
13th April 2025
20AQI
20AQI
14th April 2025
25AQI
25AQI
15th April 2025
18AQI
18AQI
16th April 2025
21AQI
21AQI
17th April 2025
26AQI
26AQI
18th April 2025
32AQI
32AQI
19th April 2025
31AQI
31AQI
20th April 2025
31AQI
31AQI
21st April 2025
24AQI
24AQI
22nd April 2025
24AQI
24AQI
23rd April 2025
15AQI
15AQI
24th April 2025
14AQI
14AQI
25th April 2025
27AQI
27AQI
26th April 2025
23AQI
23AQI
27th April 2025
26AQI
26AQI
28th April 2025
24AQI
24AQI
29th April 2025
25AQI
25AQI
30th April 2025
27AQI
27AQI
1st May 2025
24AQI
24AQI
2nd May 2025
21AQI
21AQI
3rd May 2025
19AQI
19AQI
4th May 2025
19AQI
19AQI
5th May 2025
18AQI
18AQI
6th May 2025
16AQI
16AQI
7th May 2025
15AQI
15AQI
8th May 2025
16AQI
16AQI
9th May 2025
16AQI
16AQI
10th May 2025
14AQI
14AQI
11th May 2025
15AQI
15AQI
12th May 2025
20AQI
20AQI
13th May 2025
23AQI
23AQI
14th May 2025
25AQI
25AQI
15th May 2025
24AQI
24AQI
16th May 2025
23AQI
23AQI
17th May 2025
20AQI
20AQI
18th May 2025
24AQI
24AQI
19th May 2025
25AQI
25AQI
20th May 2025
32AQI
32AQI
21st May 2025
31AQI
31AQI
22nd May 2025
24AQI
24AQI
23rd May 2025
23AQI
23AQI
24th May 2025
22AQI
22AQI
25th May 2025
17AQI
17AQI
26th May 2025
17AQI
17AQI
27th May 2025
17AQI
17AQI
28th May 2025
16AQI
16AQI
29th May 2025
20AQI
20AQI
30th May 2025
16AQI
16AQI
31st May 2025
17AQI
17AQI
1st June 2025
15AQI
15AQI
2nd June 2025
19AQI
19AQI
3rd June 2025
15AQI
15AQI
4th June 2025
19AQI
19AQI
5th June 2025
19AQI
19AQI
6th June 2025
21AQI
21AQI
7th June 2025
24AQI
24AQI
8th June 2025
29AQI
29AQI
9th June 2025
22AQI
22AQI
10th June 2025
22AQI
22AQI
11th June 2025
21AQI
21AQI
12th June 2025
23AQI
23AQI
13th June 2025
24AQI
24AQI
14th June 2025
21AQI
21AQI
15th June 2025
20AQI
20AQI
16th June 2025
23AQI
23AQI
17th June 2025
25AQI
25AQI
18th June 2025
26AQI
26AQI
19th June 2025
30AQI
30AQI
20th June 2025
30AQI
30AQI
21st June 2025
26AQI
26AQI
22nd June 2025
21AQI
21AQI
23rd June 2025
17AQI
17AQI
24th June 2025
16AQI
16AQI
25th June 2025
17AQI
17AQI
26th June 2025
17AQI
17AQI
27th June 2025
21AQI
21AQI
28th June 2025
20AQI
20AQI
29th June 2025
25AQI
25AQI
30th June 2025
48AQI
48AQI
1st July 2025
58AQI
58AQI
2nd July 2025
83AQI
83AQI
3rd July 2025
72AQI
72AQI
4th July 2025
71AQI
71AQI
5th July 2025
80AQI
80AQI
6th July 2025
65AQI
65AQI
7th July 2025
68AQI
68AQI
8th July 2025
76AQI
76AQI
9th July 2025
87AQI
87AQI
10th July 2025
63AQI
63AQI
11th July 2025
52AQI
52AQI
12th July 2025
51AQI
51AQI
13th July 2025
52AQI
52AQI
14th July 2025
42AQI
42AQI
15th July 2025
48AQI
48AQI
16th July 2025
47AQI
47AQI
17th July 2025
43AQI
43AQI
18th July 2025
37AQI
37AQI
19th July 2025
35AQI
35AQI
20th July 2025
34AQI
34AQI
21st July 2025
36AQI
36AQI
22nd July 2025
34AQI
34AQI
23rd July 2025
36AQI
36AQI
24th July 2025
35AQI
35AQI
25th July 2025
28AQI
28AQI
26th July 2025
26AQI
26AQI
27th July 2025
26AQI
26AQI
28th July 2025
30AQI
30AQI
29th July 2025
36AQI
36AQI
30th July 2025
38AQI
38AQI
31st July 2025
39AQI
39AQI
1st August 2025
44AQI
44AQI
2nd August 2025
44AQI
44AQI
3rd August 2025
46AQI
46AQI
4th August 2025
64AQI
64AQI
5th August 2025
52AQI
52AQI
6th August 2025
52AQI
52AQI
7th August 2025
46AQI
46AQI
8th August 2025
39AQI
39AQI
9th August 2025
48AQI
48AQI
10th August 2025
42AQI
42AQI
27AQI
30AQI
32AQI
23AQI
20AQI
23AQI
49AQI
48AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202530AQI
31
28
28
3
30
31
30
18
13
7
3
203
19
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
May20AQI
202433AQI
30
1
27
2
26
5
23
7
29
2
30
30
1
31
30
31
30
31
348
18
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
December25AQI
202338AQI
28
3
25
3
21
10
25
5
26
5
25
5
30
1
31
30
30
1
19
10
23
8
313
51
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
August25AQI
202233AQI
30
1
18
3
14
9
19
11
30
1
30
23
1
3
29
30
1
27
3
31
284
30
Highest AQI recorded in
March48AQI
Lowest AQI recorded in
July24AQI
202128AQI
31
28
30
1
30
30
1
29
1
31
31
28
2
29
2
22
8
28
3
347
18
Highest AQI recorded in
November40AQI
Lowest AQI recorded in
January13AQI
202016AQI
13
21
18
29
31
31
19
31
30
31
254
Highest AQI recorded in
August20AQI
Lowest AQI recorded in
December12AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
38AQILeast Polluted Year Recorded
2020(Avg.)
16AQIKoyo's annual 2025 AQI (30) shows an average percentage change of 11.7% (worsened AQI) compared to previous years: 2020 (16), 2021 (28), 2022 (33), 2023 (38), 2024 (33).
