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HistoryAQIPM2.5PM10COSO2NO2O3

Hirodaiotamachi, Yokohama, Kanagawa, 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

Hirodaiotamachi, Yokohama, Kanagawa, Japan

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
26th Aug 2021
75AQI
Lowest AQI recorded on
25th Aug 2023
13AQI

Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 45 of Good air quality, showing improvement over 2023 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 20th Aug - 21st Aug 2025

Hirodaiotamachi, Yokohama, Kanagawa, Japan

AQI
Day
Night
.

4 AM20th Aug 2025

6 PM

3 AM21st Aug 2025

Day time
Avg. Highest Time
12PM20th Aug

60AQI

Avg. Lowest Time
8AM20th Aug

43AQI

Night time
Avg. Highest Time
7PM20th Aug

54AQI

Avg. Lowest Time
3AM21st Aug

42AQI

In the last 24 hours,

Hirodaiotamachi's AQI reached its highest point of 60 at 12 PM during the Day, while the lowest point, 42, was recorded at 3 AM during the Night between 20th Aug and 21st Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Hirodaiotamachi, Yokohama, Kanagawa, Japan

JulAug
22nd - 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 - 18th18th - 19th19th - 20th20th - 21st21st
Day
Night
22nd Jul 2025394 AMAQI
22nd Jul 2025395 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025397 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025289 AMAQI
22nd Jul 20253510 AMAQI
22nd Jul 20254411 AMAQI
22nd Jul 20254412 PMAQI
22nd Jul 2025371 PMAQI
22nd Jul 2025362 PMAQI
22nd Jul 2025343 PMAQI
22nd Jul 2025344 PMAQI
22nd Jul 2025305 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025309 PMAQI
22nd Jul 20253010 PMAQI
22nd Jul 20253011 PMAQI
23rd Jul 20253012 AMAQI
23rd Jul 2025341 AMAQI
23rd Jul 2025362 AMAQI
23rd Jul 2025363 AMAQI

28°C27/30°C

23rd Jul 2025364 AMAQI
23rd Jul 2025385 AMAQI
23rd Jul 2025376 AMAQI
23rd Jul 2025377 AMAQI
23rd Jul 2025368 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252010 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20254912 PMAQI
23rd Jul 2025421 PMAQI
23rd Jul 2025372 PMAQI
23rd Jul 2025363 PMAQI
23rd Jul 2025394 PMAQI
23rd Jul 2025325 PMAQI
23rd Jul 2025276 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025289 PMAQI
23rd Jul 20253010 PMAQI
23rd Jul 20252811 PMAQI
24th Jul 20252812 AMAQI
24th Jul 2025301 AMAQI
24th Jul 2025322 AMAQI
24th Jul 2025333 AMAQI

28°C27/30°C

24th Jul 2025334 AMAQI
24th Jul 2025345 AMAQI
24th Jul 2025356 AMAQI
24th Jul 2025347 AMAQI
24th Jul 2025348 AMAQI
24th Jul 2025409 AMAQI
24th Jul 20255410 AMAQI
24th Jul 20256011 AMAQI
24th Jul 20256012 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025442 PMAQI
24th Jul 2025363 PMAQI
24th Jul 2025324 PMAQI
24th Jul 2025275 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025237 PMAQI
24th Jul 2025248 PMAQI
24th Jul 2025289 PMAQI
24th Jul 20253010 PMAQI
24th Jul 20252911 PMAQI
25th Jul 20252812 AMAQI
25th Jul 2025301 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025313 AMAQI

28°C27/30°C

25th Jul 2025324 AMAQI
25th Jul 2025345 AMAQI
25th Jul 2025356 AMAQI
25th Jul 2025357 AMAQI
25th Jul 2025348 AMAQI
25th Jul 2025309 AMAQI
25th Jul 20253110 AMAQI
25th Jul 20252611 AMAQI
25th Jul 20253512 PMAQI
25th Jul 2025261 PMAQI
25th Jul 2025262 PMAQI
25th Jul 2025243 PMAQI
25th Jul 2025234 PMAQI
25th Jul 2025205 PMAQI
25th Jul 2025256 PMAQI
25th Jul 2025257 PMAQI
25th Jul 2025248 PMAQI
25th Jul 2025279 PMAQI
25th Jul 20252910 PMAQI
25th Jul 20252811 PMAQI
26th Jul 20252712 AMAQI
26th Jul 2025301 AMAQI
26th Jul 2025322 AMAQI
26th Jul 2025323 AMAQI

29°C27/30°C

26th Jul 2025324 AMAQI
26th Jul 2025315 AMAQI
26th Jul 2025326 AMAQI
26th Jul 2025327 AMAQI
26th Jul 2025328 AMAQI
26th Jul 2025249 AMAQI
26th Jul 20252610 AMAQI
26th Jul 20252811 AMAQI
26th Jul 20252812 PMAQI
26th Jul 2025291 PMAQI
26th Jul 2025272 PMAQI
26th Jul 2025263 PMAQI
26th Jul 2025244 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025246 PMAQI
26th Jul 2025247 PMAQI
26th Jul 2025258 PMAQI
26th Jul 2025279 PMAQI
26th Jul 20252810 PMAQI
26th Jul 20252811 PMAQI
27th Jul 20252712 AMAQI
27th Jul 2025291 AMAQI
27th Jul 2025312 AMAQI
27th Jul 2025303 AMAQI

29°C27/30°C

27th Jul 2025314 AMAQI
27th Jul 2025305 AMAQI
27th Jul 2025306 AMAQI
27th Jul 2025307 AMAQI
27th Jul 2025308 AMAQI
27th Jul 2025259 AMAQI
27th Jul 20252210 AMAQI
27th Jul 20252511 AMAQI
27th Jul 20252612 PMAQI
27th Jul 2025261 PMAQI
27th Jul 2025242 PMAQI
27th Jul 2025243 PMAQI
27th Jul 2025264 PMAQI
27th Jul 2025255 PMAQI
27th Jul 2025216 PMAQI
27th Jul 2025197 PMAQI
27th Jul 2025228 PMAQI
27th Jul 2025279 PMAQI
27th Jul 20252710 PMAQI
27th Jul 20252611 PMAQI
28th Jul 20252712 AMAQI
28th Jul 2025281 AMAQI
28th Jul 2025302 AMAQI
28th Jul 2025293 AMAQI

28°C27/30°C

28th Jul 2025294 AMAQI
28th Jul 2025285 AMAQI
28th Jul 2025286 AMAQI
28th Jul 2025287 AMAQI
28th Jul 2025298 AMAQI
28th Jul 2025249 AMAQI
28th Jul 20253610 AMAQI
28th Jul 20254511 AMAQI
28th Jul 20254812 PMAQI
28th Jul 2025491 PMAQI
28th Jul 2025432 PMAQI
28th Jul 2025243 PMAQI
28th Jul 2025234 PMAQI
28th Jul 2025185 PMAQI
28th Jul 2025196 PMAQI
28th Jul 2025177 PMAQI
28th Jul 2025218 PMAQI
28th Jul 2025269 PMAQI
28th Jul 20252510 PMAQI
28th Jul 20252611 PMAQI
29th Jul 20252612 AMAQI
29th Jul 2025271 AMAQI
29th Jul 2025282 AMAQI
29th Jul 2025283 AMAQI

28°C27/30°C

29th Jul 2025304 AMAQI
29th Jul 2025295 AMAQI
29th Jul 2025306 AMAQI
29th Jul 2025307 AMAQI
29th Jul 2025288 AMAQI
29th Jul 2025249 AMAQI
29th Jul 20253110 AMAQI
29th Jul 20253511 AMAQI
29th Jul 20254012 PMAQI
29th Jul 2025471 PMAQI
29th Jul 2025532 PMAQI
29th Jul 2025553 PMAQI
29th Jul 2025544 PMAQI
29th Jul 2025465 PMAQI
29th Jul 2025336 PMAQI
29th Jul 2025287 PMAQI
29th Jul 2025228 PMAQI
29th Jul 2025279 PMAQI
29th Jul 20252610 PMAQI
29th Jul 20252611 PMAQI
30th Jul 20252812 AMAQI
30th Jul 2025281 AMAQI
30th Jul 2025282 AMAQI
30th Jul 2025283 AMAQI

29°C26/32°C

30th Jul 2025294 AMAQI
30th Jul 2025295 AMAQI
30th Jul 2025296 AMAQI
30th Jul 2025307 AMAQI
30th Jul 2025298 AMAQI
30th Jul 2025219 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252411 AMAQI
30th Jul 20253012 PMAQI
30th Jul 2025331 PMAQI
30th Jul 2025312 PMAQI
30th Jul 2025313 PMAQI
30th Jul 2025314 PMAQI
30th Jul 2025315 PMAQI
30th Jul 2025306 PMAQI
30th Jul 2025317 PMAQI
30th Jul 2025328 PMAQI
30th Jul 2025309 PMAQI
30th Jul 20253210 PMAQI
30th Jul 20253211 PMAQI
31st Jul 20253012 AMAQI
31st Jul 2025291 AMAQI
31st Jul 2025282 AMAQI
31st Jul 2025283 AMAQI

29°C26/33°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 20253911 AMAQI
31st Jul 20254012 PMAQI
31st Jul 2025341 PMAQI
31st Jul 2025342 PMAQI
31st Jul 2025373 PMAQI
31st Jul 2025344 PMAQI
31st Jul 2025305 PMAQI
31st Jul 2025276 PMAQI
31st Jul 2025237 PMAQI
31st Jul 2025278 PMAQI
31st Jul 2025299 PMAQI
31st Jul 20253110 PMAQI
31st Jul 20252611 PMAQI
1st Aug 20252812 AMAQI
1st Aug 2025301 AMAQI
1st Aug 2025362 AMAQI
1st Aug 2025373 AMAQI

28°C26/31°C

1st Aug 2025364 AMAQI
1st Aug 2025365 AMAQI
1st Aug 2025396 AMAQI
1st Aug 2025387 AMAQI
1st Aug 2025398 AMAQI
1st Aug 2025309 AMAQI
1st Aug 20252810 AMAQI
1st Aug 20253511 AMAQI
1st Aug 20253712 PMAQI
1st Aug 2025301 PMAQI
1st Aug 2025332 PMAQI
1st Aug 2025323 PMAQI
1st Aug 2025414 PMAQI
1st Aug 2025315 PMAQI
1st Aug 2025386 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025289 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20252611 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025311 AMAQI
2nd Aug 2025372 AMAQI
2nd Aug 2025373 AMAQI

28°C26/30°C

2nd Aug 2025384 AMAQI
2nd Aug 2025395 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025387 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025319 AMAQI
2nd Aug 20253210 AMAQI
2nd Aug 20253511 AMAQI
2nd Aug 20254312 PMAQI
2nd Aug 2025501 PMAQI
2nd Aug 2025552 PMAQI
2nd Aug 2025543 PMAQI
2nd Aug 2025544 PMAQI
2nd Aug 2025475 PMAQI
2nd Aug 2025546 PMAQI
2nd Aug 2025467 PMAQI
2nd Aug 2025388 PMAQI
2nd Aug 2025349 PMAQI
2nd Aug 20253610 PMAQI
2nd Aug 20254011 PMAQI
3rd Aug 20253512 AMAQI
3rd Aug 2025361 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI

29°C27/31°C

3rd Aug 2025394 AMAQI
3rd Aug 2025395 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025388 AMAQI
3rd Aug 2025439 AMAQI
3rd Aug 20255310 AMAQI
3rd Aug 20255411 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025521 PMAQI
3rd Aug 2025542 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025464 PMAQI
3rd Aug 2025445 PMAQI
3rd Aug 2025446 PMAQI
3rd Aug 2025387 PMAQI
3rd Aug 2025448 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254011 PMAQI
4th Aug 20254212 AMAQI
4th Aug 2025371 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025393 AMAQI

29°C27/33°C

4th Aug 2025414 AMAQI
4th Aug 2025435 AMAQI
4th Aug 2025426 AMAQI
4th Aug 2025427 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025599 AMAQI
4th Aug 20257210 AMAQI
4th Aug 20258311 AMAQI
4th Aug 20258412 PMAQI
4th Aug 2025891 PMAQI
4th Aug 2025902 PMAQI
4th Aug 2025863 PMAQI
4th Aug 2025864 PMAQI
4th Aug 2025905 PMAQI
4th Aug 2025866 PMAQI
4th Aug 2025767 PMAQI
4th Aug 2025718 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20254611 PMAQI
5th Aug 20256212 AMAQI
5th Aug 2025431 AMAQI
5th Aug 2025402 AMAQI
5th Aug 2025403 AMAQI

30°C28/32°C

5th Aug 2025504 AMAQI
5th Aug 2025545 AMAQI
5th Aug 2025526 AMAQI
5th Aug 2025527 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025559 AMAQI
5th Aug 20255810 AMAQI
5th Aug 20255911 AMAQI
5th Aug 20255212 PMAQI
5th Aug 2025561 PMAQI
5th Aug 2025472 PMAQI
5th Aug 2025523 PMAQI
5th Aug 2025524 PMAQI
5th Aug 2025515 PMAQI
5th Aug 2025496 PMAQI
5th Aug 2025467 PMAQI
5th Aug 2025468 PMAQI
5th Aug 2025469 PMAQI
5th Aug 20254610 PMAQI
5th Aug 20254611 PMAQI
6th Aug 20254612 AMAQI
6th Aug 2025481 AMAQI
6th Aug 2025502 AMAQI
6th Aug 2025483 AMAQI

30°C28/32°C

6th Aug 2025524 AMAQI
6th Aug 2025525 AMAQI
6th Aug 2025526 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025528 AMAQI
6th Aug 2025529 AMAQI
6th Aug 20254710 AMAQI
6th Aug 20254811 AMAQI
6th Aug 20255812 PMAQI
6th Aug 2025531 PMAQI
6th Aug 2025562 PMAQI
6th Aug 2025453 PMAQI
6th Aug 2025564 PMAQI
6th Aug 2025595 PMAQI
6th Aug 2025566 PMAQI
6th Aug 2025587 PMAQI
6th Aug 2025528 PMAQI
6th Aug 2025469 PMAQI
6th Aug 20254810 PMAQI
6th Aug 20254411 PMAQI
7th Aug 20254812 AMAQI
7th Aug 2025481 AMAQI
7th Aug 2025512 AMAQI
7th Aug 2025503 AMAQI

30°C29/32°C

7th Aug 2025524 AMAQI
7th Aug 2025505 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025467 AMAQI
7th Aug 2025508 AMAQI
7th Aug 2025489 AMAQI
7th Aug 20254710 AMAQI
7th Aug 20254711 AMAQI
7th Aug 20252812 PMAQI
7th Aug 2025321 PMAQI
7th Aug 2025322 PMAQI
7th Aug 2025433 PMAQI
7th Aug 2025594 PMAQI
7th Aug 2025605 PMAQI
7th Aug 2025536 PMAQI
7th Aug 2025527 PMAQI
7th Aug 2025528 PMAQI
7th Aug 2025529 PMAQI
7th Aug 20255210 PMAQI
7th Aug 20255211 PMAQI
8th Aug 20255212 AMAQI
8th Aug 2025521 AMAQI
8th Aug 2025522 AMAQI
8th Aug 2025523 AMAQI

31°C29/33°C

8th Aug 2025514 AMAQI
8th Aug 2025495 AMAQI
8th Aug 2025496 AMAQI
8th Aug 2025507 AMAQI
8th Aug 2025498 AMAQI
8th Aug 2025429 AMAQI
8th Aug 20254310 AMAQI
8th Aug 20254711 AMAQI
8th Aug 20255512 PMAQI
8th Aug 2025541 PMAQI
8th Aug 2025552 PMAQI
8th Aug 2025493 PMAQI
8th Aug 2025324 PMAQI
8th Aug 2025305 PMAQI
8th Aug 2025316 PMAQI
8th Aug 2025297 PMAQI
8th Aug 2025368 PMAQI
8th Aug 2025459 PMAQI
8th Aug 20254610 PMAQI
8th Aug 20254811 PMAQI
9th Aug 20254612 AMAQI
9th Aug 2025501 AMAQI
9th Aug 2025522 AMAQI
9th Aug 2025523 AMAQI

29°C26/31°C

9th Aug 2025524 AMAQI
9th Aug 2025515 AMAQI
9th Aug 2025526 AMAQI
9th Aug 2025517 AMAQI
9th Aug 2025528 AMAQI
9th Aug 2025309 AMAQI
9th Aug 20252910 AMAQI
9th Aug 20253711 AMAQI
9th Aug 20252812 PMAQI
9th Aug 2025281 PMAQI
9th Aug 2025322 PMAQI
9th Aug 2025353 PMAQI
9th Aug 2025404 PMAQI
9th Aug 2025545 PMAQI
9th Aug 2025566 PMAQI
9th Aug 2025547 PMAQI
9th Aug 2025548 PMAQI
9th Aug 2025529 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 PMAQI
10th Aug 20255112 AMAQI
10th Aug 2025491 AMAQI
10th Aug 2025482 AMAQI
10th Aug 2025493 AMAQI

28°C26/30°C

10th Aug 2025484 AMAQI
10th Aug 2025455 AMAQI
10th Aug 2025446 AMAQI
10th Aug 2025457 AMAQI
10th Aug 2025448 AMAQI
10th Aug 2025379 AMAQI
10th Aug 20253110 AMAQI
10th Aug 20253211 AMAQI
10th Aug 20252812 PMAQI
10th Aug 2025351 PMAQI
10th Aug 2025382 PMAQI
10th Aug 2025343 PMAQI
10th Aug 2025324 PMAQI
10th Aug 2025345 PMAQI
10th Aug 2025376 PMAQI
10th Aug 2025367 PMAQI
10th Aug 2025398 PMAQI
10th Aug 2025469 PMAQI
10th Aug 20254610 PMAQI
10th Aug 20254911 PMAQI
11th Aug 20254812 AMAQI
11th Aug 2025471 AMAQI
11th Aug 2025492 AMAQI
11th Aug 2025483 AMAQI

27°C26/28°C

11th Aug 2025494 AMAQI
11th Aug 2025475 AMAQI
11th Aug 2025476 AMAQI
11th Aug 2025487 AMAQI
11th Aug 2025478 AMAQI
11th Aug 2025419 AMAQI
11th Aug 20254210 AMAQI
11th Aug 20253811 AMAQI
11th Aug 20253412 PMAQI
11th Aug 2025361 PMAQI
11th Aug 2025362 PMAQI
11th Aug 2025343 PMAQI
11th Aug 2025304 PMAQI
11th Aug 2025515 PMAQI
11th Aug 2025426 PMAQI
11th Aug 2025327 PMAQI
11th Aug 2025348 PMAQI
11th Aug 2025329 PMAQI
11th Aug 20253310 PMAQI
11th Aug 20253211 PMAQI
12th Aug 20253612 AMAQI
12th Aug 2025441 AMAQI
12th Aug 2025452 AMAQI
12th Aug 2025443 AMAQI

28°C27/29°C

12th Aug 2025424 AMAQI
12th Aug 2025405 AMAQI
12th Aug 2025396 AMAQI
12th Aug 2025407 AMAQI
12th Aug 2025418 AMAQI
12th Aug 2025279 AMAQI
12th Aug 20252910 AMAQI
12th Aug 20254011 AMAQI
12th Aug 20253012 PMAQI
12th Aug 2025351 PMAQI
12th Aug 2025272 PMAQI
12th Aug 2025243 PMAQI
12th Aug 2025294 PMAQI
12th Aug 2025275 PMAQI
12th Aug 2025296 PMAQI
12th Aug 2025287 PMAQI
12th Aug 2025318 PMAQI
12th Aug 2025349 PMAQI
12th Aug 20253110 PMAQI
12th Aug 20253211 PMAQI
13th Aug 20253212 AMAQI
13th Aug 2025381 AMAQI
13th Aug 2025402 AMAQI
13th Aug 2025403 AMAQI

28°C27/29°C

13th Aug 2025384 AMAQI
13th Aug 2025375 AMAQI
13th Aug 2025386 AMAQI
13th Aug 2025387 AMAQI
13th Aug 2025388 AMAQI
13th Aug 2025249 AMAQI
13th Aug 20252410 AMAQI
13th Aug 20252611 AMAQI
13th Aug 20252912 PMAQI
13th Aug 2025281 PMAQI
13th Aug 2025362 PMAQI
13th Aug 2025363 PMAQI
13th Aug 2025304 PMAQI
13th Aug 2025365 PMAQI
13th Aug 2025286 PMAQI
13th Aug 2025267 PMAQI
13th Aug 2025328 PMAQI
13th Aug 2025319 PMAQI
13th Aug 20253210 PMAQI
13th Aug 20253311 PMAQI
14th Aug 20253112 AMAQI
14th Aug 2025371 AMAQI
14th Aug 2025362 AMAQI
14th Aug 2025383 AMAQI

28°C26/29°C

14th Aug 2025374 AMAQI
14th Aug 2025355 AMAQI
14th Aug 2025356 AMAQI
14th Aug 2025367 AMAQI
14th Aug 2025368 AMAQI
14th Aug 2025349 AMAQI
14th Aug 20254010 AMAQI
14th Aug 20255111 AMAQI
14th Aug 20254312 PMAQI
14th Aug 2025451 PMAQI
14th Aug 2025482 PMAQI
14th Aug 2025503 PMAQI
14th Aug 2025534 PMAQI
14th Aug 2025525 PMAQI
14th Aug 2025466 PMAQI
14th Aug 2025487 PMAQI
14th Aug 2025388 PMAQI
14th Aug 2025369 PMAQI
14th Aug 20253610 PMAQI
14th Aug 20253411 PMAQI
15th Aug 20253312 AMAQI
15th Aug 2025361 AMAQI
15th Aug 2025342 AMAQI
15th Aug 2025343 AMAQI

27°C25/29°C

15th Aug 2025374 AMAQI
15th Aug 2025395 AMAQI
15th Aug 2025386 AMAQI
15th Aug 2025387 AMAQI
15th Aug 2025388 AMAQI
15th Aug 2025289 AMAQI
15th Aug 20253110 AMAQI
15th Aug 20253411 AMAQI
15th Aug 20254312 PMAQI
15th Aug 2025411 PMAQI
15th Aug 2025322 PMAQI
15th Aug 2025283 PMAQI
15th Aug 2025304 PMAQI
15th Aug 2025385 PMAQI
15th Aug 2025386 PMAQI
15th Aug 2025397 PMAQI
15th Aug 2025388 PMAQI
15th Aug 2025369 PMAQI
15th Aug 20253810 PMAQI
15th Aug 20253511 PMAQI
16th Aug 20253412 AMAQI
16th Aug 2025371 AMAQI
16th Aug 2025352 AMAQI
16th Aug 2025353 AMAQI

27°C26/29°C

16th Aug 2025384 AMAQI
16th Aug 2025375 AMAQI
16th Aug 2025386 AMAQI
16th Aug 2025387 AMAQI
16th Aug 2025388 AMAQI
16th Aug 2025309 AMAQI
16th Aug 20253610 AMAQI
16th Aug 20254411 AMAQI
16th Aug 20254512 PMAQI
16th Aug 2025581 PMAQI
16th Aug 2025572 PMAQI
16th Aug 2025523 PMAQI
16th Aug 2025464 PMAQI
16th Aug 2025405 PMAQI
16th Aug 2025366 PMAQI
16th Aug 2025367 PMAQI
16th Aug 2025378 PMAQI
16th Aug 2025389 PMAQI
16th Aug 20253610 PMAQI
16th Aug 20253711 PMAQI
17th Aug 20254012 AMAQI
17th Aug 2025371 AMAQI
17th Aug 2025362 AMAQI
17th Aug 2025363 AMAQI

28°C27/29°C

17th Aug 2025374 AMAQI
17th Aug 2025365 AMAQI
17th Aug 2025386 AMAQI
17th Aug 2025377 AMAQI
17th Aug 2025378 AMAQI
17th Aug 2025369 AMAQI
17th Aug 20253810 AMAQI
17th Aug 20254011 AMAQI
17th Aug 20254812 PMAQI
17th Aug 2025481 PMAQI
17th Aug 2025532 PMAQI
17th Aug 2025393 PMAQI
17th Aug 2025414 PMAQI
17th Aug 2025405 PMAQI
17th Aug 2025346 PMAQI
17th Aug 2025297 PMAQI
17th Aug 2025318 PMAQI
17th Aug 2025329 PMAQI
17th Aug 20253610 PMAQI
17th Aug 20253511 PMAQI
18th Aug 20253412 AMAQI
18th Aug 2025371 AMAQI
18th Aug 2025382 AMAQI
18th Aug 2025373 AMAQI

28°C27/30°C

18th Aug 2025374 AMAQI
18th Aug 2025405 AMAQI
18th Aug 2025406 AMAQI
18th Aug 2025407 AMAQI
18th Aug 2025408 AMAQI
18th Aug 2025349 AMAQI
18th Aug 20254210 AMAQI
18th Aug 20253911 AMAQI
18th Aug 20254612 PMAQI
18th Aug 2025481 PMAQI
18th Aug 2025502 PMAQI
18th Aug 2025553 PMAQI
18th Aug 2025564 PMAQI
18th Aug 2025565 PMAQI
18th Aug 2025496 PMAQI
18th Aug 2025517 PMAQI
18th Aug 2025468 PMAQI
18th Aug 2025459 PMAQI
18th Aug 20254310 PMAQI
18th Aug 20254611 PMAQI
19th Aug 20253812 AMAQI
19th Aug 2025391 AMAQI
19th Aug 2025402 AMAQI
19th Aug 2025383 AMAQI

29°C27/31°C

19th Aug 2025394 AMAQI
19th Aug 2025415 AMAQI
19th Aug 2025406 AMAQI
19th Aug 2025407 AMAQI
19th Aug 2025418 AMAQI
19th Aug 2025409 AMAQI
19th Aug 20255210 AMAQI
19th Aug 20255411 AMAQI
19th Aug 20254812 PMAQI
19th Aug 2025501 PMAQI
19th Aug 2025512 PMAQI
19th Aug 2025493 PMAQI
19th Aug 2025474 PMAQI
19th Aug 2025455 PMAQI
19th Aug 2025506 PMAQI
19th Aug 2025517 PMAQI
19th Aug 2025508 PMAQI
19th Aug 2025449 PMAQI
19th Aug 20254610 PMAQI
19th Aug 20254411 PMAQI
20th Aug 20254512 AMAQI
20th Aug 2025431 AMAQI
20th Aug 2025402 AMAQI
20th Aug 2025413 AMAQI

29°C27/30°C

20th Aug 2025444 AMAQI
20th Aug 2025435 AMAQI
20th Aug 2025446 AMAQI
20th Aug 2025447 AMAQI
20th Aug 2025438 AMAQI
20th Aug 2025479 AMAQI
20th Aug 20255410 AMAQI
20th Aug 20255711 AMAQI
20th Aug 20256012 PMAQI
20th Aug 2025561 PMAQI
20th Aug 2025522 PMAQI
20th Aug 2025563 PMAQI
20th Aug 2025504 PMAQI
20th Aug 2025505 PMAQI
20th Aug 2025556 PMAQI
20th Aug 2025547 PMAQI
20th Aug 2025528 PMAQI
20th Aug 2025449 PMAQI
20th Aug 20254610 PMAQI
20th Aug 20254211 PMAQI
21st Aug 20254412 AMAQI
21st Aug 2025431 AMAQI
21st Aug 2025422 AMAQI
21st Aug 2025423 AMAQI

29°C27/30°C

21st Aug 2025464 AMAQI
4 AM
21st Aug 2025485 AMAQI
21st Aug 2025486 AMAQI
21st Aug 2025467 AMAQI
21st Aug 2025488 AMAQI
21st Aug 2025549 AMAQI
21st Aug 20255510 AMAQI
21st Aug 20255111 AMAQI
11 AM
21st Aug 20255412 PMAQI
21st Aug 2025651 PMAQI
21st Aug 2025622 PMAQI
21st Aug 2025573 PMAQI
21st Aug 2025534 PMAQI
21st Aug 2025525 PMAQI
21st Aug 2025536 PMAQI
6 PM
11 PM
3 AM

--°C/°C

Day time
Avg. Highest Time
11 AM - 2 PM

44AQI

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

35AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 2 PM (Avg. 44), while the lowest AQI was between 9 AM to 9 AM (Avg. 35).
Night time
Avg. Highest Time
12 AM - 3 AM

38AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
7 PM - 11 PM

36AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 38), while the lowest AQI was between 7 PM to 11 PM (Avg. 36).

2025 Days Vs Air Quality

Hirodaiotamachi, Yokohama, Kanagawa, Japan

2025

94%

218

6%

14

Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)

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

Under WHO’s Safe Air Quality Limits: 94%

Health Risk Level:

Very Low

In 2025, 94% of 233 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

Hirodaiotamachi, Yokohama, Kanagawa, 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
27AQI
2nd January 2025
34AQI
3rd January 2025
24AQI
4th January 2025
27AQI
5th January 2025
24AQI
6th January 2025
53AQI
7th January 2025
34AQI
8th January 2025
36AQI
9th January 2025
33AQI
10th January 2025
28AQI
11th January 2025
25AQI
12th January 2025
27AQI
13th January 2025
32AQI
14th January 2025
27AQI
15th January 2025
34AQI
16th January 2025
23AQI
17th January 2025
28AQI
18th January 2025
25AQI
19th January 2025
30AQI
20th January 2025
29AQI
21st January 2025
31AQI
22nd January 2025
39AQI
23rd January 2025
40AQI
24th January 2025
38AQI
25th January 2025
40AQI
26th January 2025
33AQI
27th January 2025
35AQI
28th January 2025
30AQI
29th January 2025
31AQI
30th January 2025
27AQI
31st January 2025
25AQI
1st February 2025
22AQI
2nd February 2025
24AQI
3rd February 2025
32AQI
4th February 2025
29AQI
5th February 2025
31AQI
6th February 2025
28AQI
7th February 2025
28AQI
8th February 2025
29AQI
9th February 2025
28AQI
10th February 2025
25AQI
11th February 2025
29AQI
12th February 2025
29AQI
13th February 2025
32AQI
14th February 2025
27AQI
15th February 2025
29AQI
16th February 2025
29AQI
17th February 2025
35AQI
18th February 2025
29AQI
19th February 2025
29AQI
20th February 2025
28AQI
21st February 2025
28AQI
22nd February 2025
29AQI
23rd February 2025
30AQI
24th February 2025
31AQI
25th February 2025
32AQI
26th February 2025
34AQI
27th February 2025
36AQI
28th February 2025
39AQI
1st March 2025
56AQI
2nd March 2025
43AQI
3rd March 2025
39AQI
4th March 2025
31AQI
5th March 2025
28AQI
6th March 2025
30AQI
7th March 2025
31AQI
8th March 2025
30AQI
9th March 2025
34AQI
10th March 2025
32AQI
11th March 2025
30AQI
12th March 2025
36AQI
13th March 2025
32AQI
14th March 2025
28AQI
15th March 2025
24AQI
16th March 2025
19AQI
17th March 2025
19AQI
18th March 2025
16AQI
19th March 2025
15AQI
20th March 2025
17AQI
21st March 2025
24AQI
22nd March 2025
27AQI
23rd March 2025
32AQI
24th March 2025
29AQI
25th March 2025
47AQI
26th March 2025
60AQI
27th March 2025
55AQI
28th March 2025
37AQI
29th March 2025
31AQI
30th March 2025
30AQI
31st March 2025
27AQI
1st April 2025
21AQI
2nd April 2025
20AQI
3rd April 2025
17AQI
4th April 2025
19AQI
5th April 2025
17AQI
6th April 2025
15AQI
7th April 2025
16AQI
8th April 2025
20AQI
9th April 2025
19AQI
10th April 2025
23AQI
11th April 2025
23AQI
12th April 2025
21AQI
13th April 2025
19AQI
14th April 2025
25AQI
15th April 2025
21AQI
16th April 2025
20AQI
17th April 2025
26AQI
18th April 2025
28AQI
19th April 2025
33AQI
20th April 2025
25AQI
21st April 2025
23AQI
22nd April 2025
21AQI
23rd April 2025
16AQI
24th April 2025
20AQI
25th April 2025
19AQI
26th April 2025
21AQI
27th April 2025
21AQI
28th April 2025
20AQI
29th April 2025
15AQI
30th April 2025
20AQI
1st May 2025
18AQI
2nd May 2025
17AQI
3rd May 2025
18AQI
4th May 2025
25AQI
5th May 2025
20AQI
6th May 2025
18AQI
7th May 2025
16AQI
8th May 2025
17AQI
9th May 2025
17AQI
10th May 2025
14AQI
11th May 2025
17AQI
12th May 2025
16AQI
13th May 2025
21AQI
14th May 2025
19AQI
15th May 2025
21AQI
16th May 2025
21AQI
17th May 2025
19AQI
18th May 2025
25AQI
19th May 2025
28AQI
20th May 2025
58AQI
21st May 2025
35AQI
22nd May 2025
32AQI
23rd May 2025
27AQI
24th May 2025
25AQI
25th May 2025
19AQI
26th May 2025
22AQI
27th May 2025
25AQI
28th May 2025
17AQI
29th May 2025
20AQI
30th May 2025
15AQI
31st May 2025
14AQI
1st June 2025
14AQI
2nd June 2025
21AQI
3rd June 2025
21AQI
4th June 2025
18AQI
5th June 2025
24AQI
6th June 2025
24AQI
7th June 2025
37AQI
8th June 2025
31AQI
9th June 2025
31AQI
10th June 2025
25AQI
11th June 2025
20AQI
12th June 2025
24AQI
13th June 2025
21AQI
14th June 2025
18AQI
15th June 2025
22AQI
16th June 2025
23AQI
17th June 2025
29AQI
18th June 2025
26AQI
19th June 2025
27AQI
20th June 2025
26AQI
21st June 2025
23AQI
22nd June 2025
15AQI
23rd June 2025
15AQI
24th June 2025
16AQI
25th June 2025
18AQI
26th June 2025
16AQI
27th June 2025
19AQI
28th June 2025
18AQI
29th June 2025
20AQI
30th June 2025
30AQI
1st July 2025
32AQI
2nd July 2025
38AQI
3rd July 2025
39AQI
4th July 2025
40AQI
5th July 2025
46AQI
6th July 2025
57AQI
7th July 2025
70AQI
8th July 2025
70AQI
9th July 2025
72AQI
10th July 2025
58AQI
11th July 2025
54AQI
12th July 2025
56AQI
13th July 2025
55AQI
14th July 2025
48AQI
15th July 2025
47AQI
16th July 2025
46AQI
17th July 2025
46AQI
18th July 2025
42AQI
19th July 2025
37AQI
20th July 2025
35AQI
21st July 2025
35AQI
22nd July 2025
33AQI
23rd July 2025
32AQI
24th July 2025
33AQI
25th July 2025
29AQI
26th July 2025
28AQI
27th July 2025
27AQI
28th July 2025
28AQI
29th July 2025
32AQI
30th July 2025
29AQI
31st July 2025
30AQI
1st August 2025
32AQI
2nd August 2025
39AQI
3rd August 2025
43AQI
4th August 2025
58AQI
5th August 2025
50AQI
6th August 2025
50AQI
7th August 2025
49AQI
8th August 2025
47AQI
9th August 2025
46AQI
10th August 2025
43AQI
11th August 2025
42AQI
12th August 2025
34AQI
13th August 2025
33AQI
14th August 2025
38AQI
15th August 2025
36AQI
16th August 2025
38AQI
17th August 2025
38AQI
18th August 2025
42AQI
19th August 2025
45AQI
20th August 2025
45AQI

31AQI

30AQI

32AQI

21AQI

22AQI

22AQI

43AQI

42AQI

No. of days

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

202530AQI

30
1
28
28
3
30
30
1
30
23
8
19
1
218
14

Highest AQI recorded in

July

43AQI

Lowest AQI recorded in

April

21AQI

202434AQI

27
2
28
1
22
7
27
3
30
1
28
2
23
8
31
30
30
1
30
31
337
25

Highest AQI recorded in

March

44AQI

Lowest AQI recorded in

September

25AQI

202340AQI

21
8
19
9
21
10
19
11
26
5
21
9
23
8
27
4
28
2
30
1
21
5
24
7
280
79

Highest AQI recorded in

April

49AQI

Lowest AQI recorded in

August

30AQI

202239AQI

26
4
13
6
19
12
19
10
24
7
22
8
19
2
1
26
2
28
3
22
4
30
1
249
59

Highest AQI recorded in

March

47AQI

Lowest AQI recorded in

August

28AQI

202138AQI

18
11
18
7
24
5
20
2
24
7
27
3
27
4
25
6
29
1
28
3
22
6
24
7
286
62

Highest AQI recorded in

January

44AQI

Lowest AQI recorded in

September

34AQI

202037AQI

10
3
18
3
18
21
9
29
2
18
13
19
29
2
18
11
19
12
199
55

Highest AQI recorded in

August

47AQI

Lowest AQI recorded in

September

26AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
40AQI
Least Polluted Year Recorded
2025(Avg.)
30AQI

Hirodaiotamachi's annual 2025 AQI (30) shows an average percentage change of -20.4% (improved AQI) compared to previous years: 2020 (37), 2021 (38), 2022 (39), 2023 (40), 2024 (34).