Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Usuki, Oita, 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

Usuki, Oita, Japan

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2024
66AQI
Lowest AQI recorded on
13th Aug 2021
17AQI

Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 44 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 4th Aug - 5th Aug 2025

Usuki, Oita, Japan

AQI
Day
Night
.

5 AM4th Aug 2025

7 PM

4 AM5th Aug 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
12PM4th Aug

58AQI

Avg. Lowest Time
10PM4th Aug

41AQI

In the last 24 hours,

Usuki's AQI reached its highest point of 58 at 12 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 4th Aug and 5th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Usuki, Oita, Japan

JulAug
06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
6th Jul 2025895 AMAQI
6th Jul 2025896 AMAQI
6th Jul 2025907 AMAQI
6th Jul 2025898 AMAQI
6th Jul 2025769 AMAQI
6th Jul 20256310 AMAQI
6th Jul 20256311 AMAQI
6th Jul 20256312 PMAQI
6th Jul 2025621 PMAQI
6th Jul 2025542 PMAQI
6th Jul 2025493 PMAQI
6th Jul 2025504 PMAQI
6th Jul 2025495 PMAQI
6th Jul 2025506 PMAQI
6th Jul 2025507 PMAQI
6th Jul 2025608 PMAQI
6th Jul 2025729 PMAQI
6th Jul 20257410 PMAQI
6th Jul 20257411 PMAQI
7th Jul 20257212 AMAQI
7th Jul 2025761 AMAQI
7th Jul 2025852 AMAQI
7th Jul 2025863 AMAQI
7th Jul 2025844 AMAQI

26°C23/30°C

7th Jul 2025825 AMAQI
7th Jul 2025826 AMAQI
7th Jul 2025827 AMAQI
7th Jul 2025848 AMAQI
7th Jul 2025479 AMAQI
7th Jul 20253610 AMAQI
7th Jul 20254111 AMAQI
7th Jul 20254412 PMAQI
7th Jul 2025481 PMAQI
7th Jul 2025482 PMAQI
7th Jul 2025493 PMAQI
7th Jul 2025484 PMAQI
7th Jul 2025485 PMAQI
7th Jul 2025516 PMAQI
7th Jul 2025527 PMAQI
7th Jul 2025578 PMAQI
7th Jul 2025679 PMAQI
7th Jul 20256610 PMAQI
7th Jul 20256611 PMAQI
8th Jul 20256812 AMAQI
8th Jul 2025731 AMAQI
8th Jul 2025802 AMAQI
8th Jul 2025803 AMAQI
8th Jul 2025784 AMAQI

26°C23/30°C

8th Jul 2025745 AMAQI
8th Jul 2025746 AMAQI
8th Jul 2025747 AMAQI
8th Jul 2025758 AMAQI
8th Jul 2025609 AMAQI
8th Jul 20255610 AMAQI
8th Jul 20255911 AMAQI
8th Jul 20255912 PMAQI
8th Jul 2025581 PMAQI
8th Jul 2025602 PMAQI
8th Jul 2025603 PMAQI
8th Jul 2025624 PMAQI
8th Jul 2025655 PMAQI
8th Jul 2025686 PMAQI
8th Jul 2025707 PMAQI
8th Jul 2025708 PMAQI
8th Jul 2025719 PMAQI
8th Jul 20257010 PMAQI
8th Jul 20257011 PMAQI
9th Jul 20257112 AMAQI
9th Jul 2025731 AMAQI
9th Jul 2025742 AMAQI
9th Jul 2025743 AMAQI
9th Jul 2025734 AMAQI

27°C24/31°C

9th Jul 2025715 AMAQI
9th Jul 2025716 AMAQI
9th Jul 2025717 AMAQI
9th Jul 2025718 AMAQI
9th Jul 2025779 AMAQI
9th Jul 20258310 AMAQI
9th Jul 20258911 AMAQI
9th Jul 20259212 PMAQI
9th Jul 2025911 PMAQI
9th Jul 2025842 PMAQI
9th Jul 2025783 PMAQI
9th Jul 2025804 PMAQI
9th Jul 2025865 PMAQI
9th Jul 2025856 PMAQI
9th Jul 2025807 PMAQI
9th Jul 2025808 PMAQI
9th Jul 2025749 PMAQI
9th Jul 20257110 PMAQI
9th Jul 20256911 PMAQI
10th Jul 20256712 AMAQI
10th Jul 2025681 AMAQI
10th Jul 2025712 AMAQI
10th Jul 2025713 AMAQI
10th Jul 2025724 AMAQI

26°C24/30°C

10th Jul 2025735 AMAQI
10th Jul 2025736 AMAQI
10th Jul 2025747 AMAQI
10th Jul 2025738 AMAQI
10th Jul 2025579 AMAQI
10th Jul 20256010 AMAQI
10th Jul 20256811 AMAQI
10th Jul 20257412 PMAQI
10th Jul 2025791 PMAQI
10th Jul 2025792 PMAQI
10th Jul 2025773 PMAQI
10th Jul 2025804 PMAQI
10th Jul 2025795 PMAQI
10th Jul 2025736 PMAQI
10th Jul 2025657 PMAQI
10th Jul 2025578 PMAQI
10th Jul 2025609 PMAQI
10th Jul 20255910 PMAQI
10th Jul 20255911 PMAQI
11th Jul 20255912 AMAQI
11th Jul 2025631 AMAQI
11th Jul 2025702 AMAQI
11th Jul 2025703 AMAQI
11th Jul 2025694 AMAQI

26°C23/28°C

11th Jul 2025715 AMAQI
11th Jul 2025716 AMAQI
11th Jul 2025717 AMAQI
11th Jul 2025718 AMAQI
11th Jul 2025349 AMAQI
11th Jul 20252210 AMAQI
11th Jul 20252211 AMAQI
11th Jul 20252112 PMAQI
11th Jul 2025271 PMAQI
11th Jul 2025292 PMAQI
11th Jul 2025293 PMAQI
11th Jul 2025304 PMAQI
11th Jul 2025275 PMAQI
11th Jul 2025276 PMAQI
11th Jul 2025297 PMAQI
11th Jul 2025388 PMAQI
11th Jul 2025549 PMAQI
11th Jul 20255410 PMAQI
11th Jul 20255511 PMAQI
12th Jul 20255512 AMAQI
12th Jul 2025591 AMAQI
12th Jul 2025652 AMAQI
12th Jul 2025673 AMAQI
12th Jul 2025654 AMAQI

25°C24/28°C

12th Jul 2025625 AMAQI
12th Jul 2025616 AMAQI
12th Jul 2025627 AMAQI
12th Jul 2025628 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20251810 AMAQI
12th Jul 20252211 AMAQI
12th Jul 20252212 PMAQI
12th Jul 2025341 PMAQI
12th Jul 2025412 PMAQI
12th Jul 2025423 PMAQI
12th Jul 2025404 PMAQI
12th Jul 2025395 PMAQI
12th Jul 2025346 PMAQI
12th Jul 2025287 PMAQI
12th Jul 2025358 PMAQI
12th Jul 2025499 PMAQI
12th Jul 20255010 PMAQI
12th Jul 20255111 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025561 AMAQI
13th Jul 2025622 AMAQI
13th Jul 2025623 AMAQI
13th Jul 2025604 AMAQI

26°C23/28°C

13th Jul 2025585 AMAQI
13th Jul 2025586 AMAQI
13th Jul 2025587 AMAQI
13th Jul 2025588 AMAQI
13th Jul 2025389 AMAQI
13th Jul 20252110 AMAQI
13th Jul 20252011 AMAQI
13th Jul 20252112 PMAQI
13th Jul 2025271 PMAQI
13th Jul 2025242 PMAQI
13th Jul 2025313 PMAQI
13th Jul 2025264 PMAQI
13th Jul 2025225 PMAQI
13th Jul 2025216 PMAQI
13th Jul 2025237 PMAQI
13th Jul 2025328 PMAQI
13th Jul 2025479 PMAQI
13th Jul 20254710 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254412 AMAQI
14th Jul 2025511 AMAQI
14th Jul 2025582 AMAQI
14th Jul 2025583 AMAQI
14th Jul 2025574 AMAQI

26°C24/29°C

14th Jul 2025545 AMAQI
14th Jul 2025546 AMAQI
14th Jul 2025547 AMAQI
14th Jul 2025548 AMAQI
14th Jul 2025309 AMAQI
14th Jul 20252410 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252712 PMAQI
14th Jul 2025311 PMAQI
14th Jul 2025272 PMAQI
14th Jul 2025243 PMAQI
14th Jul 2025224 PMAQI
14th Jul 2025215 PMAQI
14th Jul 2025246 PMAQI
14th Jul 2025247 PMAQI
14th Jul 2025318 PMAQI
14th Jul 2025459 PMAQI
14th Jul 20254410 PMAQI
14th Jul 20254411 PMAQI
15th Jul 20254412 AMAQI
15th Jul 2025481 AMAQI
15th Jul 2025542 AMAQI
15th Jul 2025553 AMAQI
15th Jul 2025544 AMAQI

25°C22/29°C

15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025379 AMAQI
15th Jul 20253410 AMAQI
15th Jul 20253311 AMAQI
15th Jul 20253712 PMAQI
15th Jul 2025441 PMAQI
15th Jul 2025502 PMAQI
15th Jul 2025523 PMAQI
15th Jul 2025514 PMAQI
15th Jul 2025555 PMAQI
15th Jul 2025586 PMAQI
15th Jul 2025617 PMAQI
15th Jul 2025618 PMAQI
15th Jul 2025549 PMAQI
15th Jul 20255510 PMAQI
15th Jul 20255211 PMAQI
16th Jul 20255012 AMAQI
16th Jul 2025501 AMAQI
16th Jul 2025522 AMAQI
16th Jul 2025523 AMAQI
16th Jul 2025524 AMAQI

25°C21/30°C

16th Jul 2025515 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025517 AMAQI
16th Jul 2025528 AMAQI
16th Jul 2025399 AMAQI
16th Jul 20253710 AMAQI
16th Jul 20254111 AMAQI
16th Jul 20255112 PMAQI
16th Jul 2025631 PMAQI
16th Jul 2025682 PMAQI
16th Jul 2025673 PMAQI
16th Jul 2025634 PMAQI
16th Jul 2025565 PMAQI
16th Jul 2025536 PMAQI
16th Jul 2025547 PMAQI
16th Jul 2025548 PMAQI
16th Jul 2025529 PMAQI
16th Jul 20255210 PMAQI
16th Jul 20255211 PMAQI
17th Jul 20255212 AMAQI
17th Jul 2025521 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
17th Jul 2025524 AMAQI

25°C21/30°C

17th Jul 2025525 AMAQI
17th Jul 2025526 AMAQI
17th Jul 2025537 AMAQI
17th Jul 2025528 AMAQI
17th Jul 2025339 AMAQI
17th Jul 20253010 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253612 PMAQI
17th Jul 2025351 PMAQI
17th Jul 2025332 PMAQI
17th Jul 2025323 PMAQI
17th Jul 2025304 PMAQI
17th Jul 2025325 PMAQI
17th Jul 2025306 PMAQI
17th Jul 2025217 PMAQI
17th Jul 2025298 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20254010 PMAQI
17th Jul 20254011 PMAQI
18th Jul 20253912 AMAQI
18th Jul 2025441 AMAQI
18th Jul 2025502 AMAQI
18th Jul 2025523 AMAQI
18th Jul 2025514 AMAQI

26°C24/30°C

18th Jul 2025515 AMAQI
18th Jul 2025516 AMAQI
18th Jul 2025517 AMAQI
18th Jul 2025518 AMAQI
18th Jul 2025269 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20251911 AMAQI
18th Jul 20251812 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025202 PMAQI
18th Jul 2025263 PMAQI
18th Jul 2025254 PMAQI
18th Jul 2025195 PMAQI
18th Jul 2025236 PMAQI
18th Jul 2025257 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025379 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20253911 PMAQI
19th Jul 20254112 AMAQI
19th Jul 2025461 AMAQI
19th Jul 2025502 AMAQI
19th Jul 2025503 AMAQI
19th Jul 2025474 AMAQI

25°C24/25°C

19th Jul 2025445 AMAQI
19th Jul 2025436 AMAQI
19th Jul 2025447 AMAQI
19th Jul 2025448 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20251910 AMAQI
19th Jul 20252311 AMAQI
19th Jul 20252312 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025253 PMAQI
19th Jul 2025274 PMAQI
19th Jul 2025235 PMAQI
19th Jul 2025256 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253110 PMAQI
19th Jul 20253411 PMAQI
20th Jul 20253612 AMAQI
20th Jul 2025401 AMAQI
20th Jul 2025462 AMAQI
20th Jul 2025463 AMAQI
20th Jul 2025444 AMAQI

26°C23/29°C

20th Jul 2025425 AMAQI
20th Jul 2025426 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025289 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20251811 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025231 PMAQI
20th Jul 2025202 PMAQI
20th Jul 2025203 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025215 PMAQI
20th Jul 2025216 PMAQI
20th Jul 2025197 PMAQI
20th Jul 2025228 PMAQI
20th Jul 2025289 PMAQI
20th Jul 20253010 PMAQI
20th Jul 20253211 PMAQI
21st Jul 20253412 AMAQI
21st Jul 2025371 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025423 AMAQI
21st Jul 2025404 AMAQI

26°C24/29°C

21st Jul 2025385 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025387 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025209 AMAQI
21st Jul 20251710 AMAQI
21st Jul 20251811 AMAQI
21st Jul 20251712 PMAQI
21st Jul 2025161 PMAQI
21st Jul 2025162 PMAQI
21st Jul 2025183 PMAQI
21st Jul 2025194 PMAQI
21st Jul 2025215 PMAQI
21st Jul 2025216 PMAQI
21st Jul 2025217 PMAQI
21st Jul 2025258 PMAQI
21st Jul 2025319 PMAQI
21st Jul 20253110 PMAQI
21st Jul 20252911 PMAQI
22nd Jul 20252912 AMAQI
22nd Jul 2025351 AMAQI
22nd Jul 2025392 AMAQI
22nd Jul 2025383 AMAQI
22nd Jul 2025364 AMAQI

26°C23/30°C

22nd Jul 2025345 AMAQI
22nd Jul 2025346 AMAQI
22nd Jul 2025347 AMAQI
22nd Jul 2025348 AMAQI
22nd Jul 2025249 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252512 PMAQI
22nd Jul 2025251 PMAQI
22nd Jul 2025232 PMAQI
22nd Jul 2025213 PMAQI
22nd Jul 2025214 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025246 PMAQI
22nd Jul 2025257 PMAQI
22nd Jul 2025298 PMAQI
22nd Jul 2025279 PMAQI
22nd Jul 20252710 PMAQI
22nd Jul 20252611 PMAQI
23rd Jul 20252612 AMAQI
23rd Jul 2025301 AMAQI
23rd Jul 2025362 AMAQI
23rd Jul 2025353 AMAQI
23rd Jul 2025344 AMAQI

26°C23/30°C

23rd Jul 2025335 AMAQI
23rd Jul 2025336 AMAQI
23rd Jul 2025337 AMAQI
23rd Jul 2025338 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20251810 AMAQI
23rd Jul 20252111 AMAQI
23rd Jul 20252012 PMAQI
23rd Jul 2025201 PMAQI
23rd Jul 2025202 PMAQI
23rd Jul 2025213 PMAQI
23rd Jul 2025224 PMAQI
23rd Jul 2025235 PMAQI
23rd Jul 2025226 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025268 PMAQI
23rd Jul 2025269 PMAQI
23rd Jul 20252510 PMAQI
23rd Jul 20252711 PMAQI
24th Jul 20252512 AMAQI
24th Jul 2025281 AMAQI
24th Jul 2025332 AMAQI
24th Jul 2025333 AMAQI
24th Jul 2025324 AMAQI

26°C23/31°C

24th Jul 2025305 AMAQI
24th Jul 2025306 AMAQI
24th Jul 2025307 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025219 AMAQI
24th Jul 20251910 AMAQI
24th Jul 20252011 AMAQI
24th Jul 20252512 PMAQI
24th Jul 2025251 PMAQI
24th Jul 2025212 PMAQI
24th Jul 2025193 PMAQI
24th Jul 2025194 PMAQI
24th Jul 2025205 PMAQI
24th Jul 2025196 PMAQI
24th Jul 2025177 PMAQI
24th Jul 2025208 PMAQI
24th Jul 2025239 PMAQI
24th Jul 20252210 PMAQI
24th Jul 20252311 PMAQI
25th Jul 20252612 AMAQI
25th Jul 2025291 AMAQI
25th Jul 2025302 AMAQI
25th Jul 2025313 AMAQI
25th Jul 2025304 AMAQI

27°C24/30°C

25th Jul 2025285 AMAQI
25th Jul 2025286 AMAQI
25th Jul 2025287 AMAQI
25th Jul 2025298 AMAQI
25th Jul 2025209 AMAQI
25th Jul 20251810 AMAQI
25th Jul 20251811 AMAQI
25th Jul 20251912 PMAQI
25th Jul 2025191 PMAQI
25th Jul 2025182 PMAQI
25th Jul 2025183 PMAQI
25th Jul 2025174 PMAQI
25th Jul 2025185 PMAQI
25th Jul 2025196 PMAQI
25th Jul 2025197 PMAQI
25th Jul 2025198 PMAQI
25th Jul 2025239 PMAQI
25th Jul 20252410 PMAQI
25th Jul 20252611 PMAQI
26th Jul 20252712 AMAQI
26th Jul 2025271 AMAQI
26th Jul 2025282 AMAQI
26th Jul 2025293 AMAQI
26th Jul 2025274 AMAQI

26°C24/28°C

26th Jul 2025275 AMAQI
26th Jul 2025266 AMAQI
26th Jul 2025267 AMAQI
26th Jul 2025268 AMAQI
26th Jul 2025179 AMAQI
26th Jul 20251410 AMAQI
26th Jul 20251611 AMAQI
26th Jul 20251712 PMAQI
26th Jul 2025201 PMAQI
26th Jul 2025202 PMAQI
26th Jul 2025173 PMAQI
26th Jul 2025184 PMAQI
26th Jul 2025185 PMAQI
26th Jul 2025186 PMAQI
26th Jul 2025207 PMAQI
26th Jul 2025238 PMAQI
26th Jul 2025259 PMAQI
26th Jul 20252510 PMAQI
26th Jul 20252411 PMAQI
27th Jul 20252212 AMAQI
27th Jul 2025231 AMAQI
27th Jul 2025272 AMAQI
27th Jul 2025283 AMAQI
27th Jul 2025274 AMAQI

26°C24/28°C

27th Jul 2025265 AMAQI
27th Jul 2025266 AMAQI
27th Jul 2025267 AMAQI
27th Jul 2025268 AMAQI
27th Jul 2025239 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252111 AMAQI
27th Jul 20251912 PMAQI
27th Jul 2025161 PMAQI
27th Jul 2025172 PMAQI
27th Jul 2025183 PMAQI
27th Jul 2025194 PMAQI
27th Jul 2025205 PMAQI
27th Jul 2025216 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025218 PMAQI
27th Jul 2025259 PMAQI
27th Jul 20252310 PMAQI
27th Jul 20252211 PMAQI
28th Jul 20252312 AMAQI
28th Jul 2025231 AMAQI
28th Jul 2025262 AMAQI
28th Jul 2025273 AMAQI
28th Jul 2025264 AMAQI

26°C24/28°C

28th Jul 2025255 AMAQI
28th Jul 2025256 AMAQI
28th Jul 2025257 AMAQI
28th Jul 2025258 AMAQI
28th Jul 2025219 AMAQI
28th Jul 20252110 AMAQI
28th Jul 20252211 AMAQI
28th Jul 20252112 PMAQI
28th Jul 2025211 PMAQI
28th Jul 2025212 PMAQI
28th Jul 2025203 PMAQI
28th Jul 2025194 PMAQI
28th Jul 2025205 PMAQI
28th Jul 2025186 PMAQI
28th Jul 2025197 PMAQI
28th Jul 2025238 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252310 PMAQI
28th Jul 20252211 PMAQI
29th Jul 20252212 AMAQI
29th Jul 2025231 AMAQI
29th Jul 2025262 AMAQI
29th Jul 2025263 AMAQI
29th Jul 2025254 AMAQI

26°C23/30°C

29th Jul 2025245 AMAQI
29th Jul 2025246 AMAQI
29th Jul 2025247 AMAQI
29th Jul 2025248 AMAQI
29th Jul 2025199 AMAQI
29th Jul 20252210 AMAQI
29th Jul 20251911 AMAQI
29th Jul 20251812 PMAQI
29th Jul 2025171 PMAQI
29th Jul 2025182 PMAQI
29th Jul 2025213 PMAQI
29th Jul 2025194 PMAQI
29th Jul 2025185 PMAQI
29th Jul 2025186 PMAQI
29th Jul 2025217 PMAQI
29th Jul 2025258 PMAQI
29th Jul 2025269 PMAQI
29th Jul 20252010 PMAQI
29th Jul 20252011 PMAQI
30th Jul 20252312 AMAQI
30th Jul 2025221 AMAQI
30th Jul 2025252 AMAQI
30th Jul 2025253 AMAQI
30th Jul 2025244 AMAQI

26°C23/30°C

30th Jul 2025235 AMAQI
30th Jul 2025246 AMAQI
30th Jul 2025237 AMAQI
30th Jul 2025238 AMAQI
30th Jul 2025219 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252311 AMAQI
30th Jul 20252612 PMAQI
30th Jul 2025241 PMAQI
30th Jul 2025242 PMAQI
30th Jul 2025183 PMAQI
30th Jul 2025184 PMAQI
30th Jul 2025185 PMAQI
30th Jul 2025186 PMAQI
30th Jul 2025277 PMAQI
30th Jul 2025188 PMAQI
30th Jul 2025229 PMAQI
30th Jul 20252410 PMAQI
30th Jul 20252411 PMAQI
31st Jul 20252412 AMAQI
31st Jul 2025231 AMAQI
31st Jul 2025232 AMAQI
31st Jul 2025233 AMAQI
31st Jul 2025294 AMAQI

25°C22/30°C

31st Jul 2025315 AMAQI
31st Jul 2025316 AMAQI
31st Jul 2025317 AMAQI
31st Jul 2025318 AMAQI
31st Jul 2025319 AMAQI
31st Jul 20253110 AMAQI
31st Jul 20252911 AMAQI
31st Jul 20253112 PMAQI
31st Jul 2025321 PMAQI
31st Jul 2025292 PMAQI
31st Jul 2025233 PMAQI
31st Jul 2025234 PMAQI
31st Jul 2025275 PMAQI
31st Jul 2025326 PMAQI
31st Jul 2025347 PMAQI
31st Jul 2025348 PMAQI
31st Jul 2025399 PMAQI
31st Jul 20253810 PMAQI
31st Jul 20253711 PMAQI
1st Aug 20253212 AMAQI
1st Aug 2025321 AMAQI
1st Aug 2025312 AMAQI
1st Aug 2025283 AMAQI
1st Aug 2025284 AMAQI

26°C22/31°C

1st Aug 2025295 AMAQI
1st Aug 2025296 AMAQI
1st Aug 2025307 AMAQI
1st Aug 2025308 AMAQI
1st Aug 2025459 AMAQI
1st Aug 20254410 AMAQI
1st Aug 20255311 AMAQI
1st Aug 20255512 PMAQI
1st Aug 2025551 PMAQI
1st Aug 2025482 PMAQI
1st Aug 2025523 PMAQI
1st Aug 2025554 PMAQI
1st Aug 2025545 PMAQI
1st Aug 2025566 PMAQI
1st Aug 2025497 PMAQI
1st Aug 2025468 PMAQI
1st Aug 2025419 PMAQI
1st Aug 20254010 PMAQI
1st Aug 20254111 PMAQI
2nd Aug 20253812 AMAQI
2nd Aug 2025371 AMAQI
2nd Aug 2025332 AMAQI
2nd Aug 2025303 AMAQI
2nd Aug 2025344 AMAQI

27°C23/32°C

2nd Aug 2025375 AMAQI
2nd Aug 2025386 AMAQI
2nd Aug 2025377 AMAQI
2nd Aug 2025378 AMAQI
2nd Aug 2025479 AMAQI
2nd Aug 20255010 AMAQI
2nd Aug 20255211 AMAQI
2nd Aug 20255712 PMAQI
2nd Aug 2025551 PMAQI
2nd Aug 2025532 PMAQI
2nd Aug 2025553 PMAQI
2nd Aug 2025514 PMAQI
2nd Aug 2025545 PMAQI
2nd Aug 2025526 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025508 PMAQI
2nd Aug 2025479 PMAQI
2nd Aug 20254610 PMAQI
2nd Aug 20254711 PMAQI
3rd Aug 20254012 AMAQI
3rd Aug 2025391 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI
3rd Aug 2025394 AMAQI

28°C24/32°C

3rd Aug 2025435 AMAQI
3rd Aug 2025416 AMAQI
3rd Aug 2025437 AMAQI
3rd Aug 2025438 AMAQI
3rd Aug 2025449 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20255011 AMAQI
3rd Aug 20255312 PMAQI
3rd Aug 2025571 PMAQI
3rd Aug 2025552 PMAQI
3rd Aug 2025523 PMAQI
3rd Aug 2025584 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025516 PMAQI
3rd Aug 2025567 PMAQI
3rd Aug 2025518 PMAQI
3rd Aug 2025499 PMAQI
3rd Aug 20254910 PMAQI
3rd Aug 20254711 PMAQI
4th Aug 20254812 AMAQI
4th Aug 2025421 AMAQI
4th Aug 2025412 AMAQI
4th Aug 2025403 AMAQI
4th Aug 2025444 AMAQI

28°C24/32°C

4th Aug 2025465 AMAQI
4th Aug 2025466 AMAQI
4th Aug 2025467 AMAQI
4th Aug 2025468 AMAQI
4th Aug 2025529 AMAQI
4th Aug 20254710 AMAQI
4th Aug 20255111 AMAQI
4th Aug 20255812 PMAQI
4th Aug 2025561 PMAQI
4th Aug 2025532 PMAQI
4th Aug 2025523 PMAQI
4th Aug 2025434 PMAQI
4th Aug 2025515 PMAQI
4th Aug 2025476 PMAQI
4th Aug 2025477 PMAQI
4th Aug 2025508 PMAQI
4th Aug 2025469 PMAQI
4th Aug 20254110 PMAQI
4th Aug 20254611 PMAQI
5th Aug 20254512 AMAQI
5th Aug 2025471 AMAQI
5th Aug 2025452 AMAQI

--°C/°C

5 AM
12 PM
7 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 AM

47AQI

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

32AQI

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. 47), while the lowest AQI was between 10 AM to 10 AM (Avg. 32).
Night time
Avg. Highest Time
2 AM - 4 AM

48AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
8 PM

38AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 4 AM (Avg. 48), while the lowest AQI was between 8 PM to 8 PM (Avg. 38).

2025 Days Vs Air Quality

Usuki, Oita, Japan

2025

79%

170

21%

45

Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)

Good
170 Days
Moderate
45 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 79%

Health Risk Level:

Low

In 2025, 79% of 216 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

Usuki, Oita, 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
30AQI
2nd January 2025
35AQI
3rd January 2025
34AQI
4th January 2025
31AQI
5th January 2025
29AQI
6th January 2025
37AQI
7th January 2025
31AQI
8th January 2025
35AQI
9th January 2025
29AQI
10th January 2025
30AQI
11th January 2025
28AQI
12th January 2025
31AQI
13th January 2025
39AQI
14th January 2025
41AQI
15th January 2025
38AQI
16th January 2025
35AQI
17th January 2025
38AQI
18th January 2025
33AQI
19th January 2025
40AQI
20th January 2025
36AQI
21st January 2025
55AQI
22nd January 2025
57AQI
23rd January 2025
61AQI
24th January 2025
65AQI
25th January 2025
45AQI
26th January 2025
42AQI
27th January 2025
33AQI
28th January 2025
35AQI
29th January 2025
32AQI
30th January 2025
35AQI
31st January 2025
40AQI
1st February 2025
41AQI
2nd February 2025
32AQI
3rd February 2025
40AQI
4th February 2025
32AQI
5th February 2025
37AQI
6th February 2025
32AQI
7th February 2025
32AQI
8th February 2025
32AQI
9th February 2025
31AQI
10th February 2025
32AQI
11th February 2025
36AQI
12th February 2025
35AQI
13th February 2025
32AQI
14th February 2025
35AQI
15th February 2025
31AQI
16th February 2025
40AQI
17th February 2025
41AQI
18th February 2025
35AQI
19th February 2025
36AQI
20th February 2025
32AQI
21st February 2025
33AQI
22nd February 2025
37AQI
23rd February 2025
36AQI
24th February 2025
35AQI
25th February 2025
36AQI
26th February 2025
40AQI
27th February 2025
55AQI
28th February 2025
53AQI
1st March 2025
68AQI
2nd March 2025
67AQI
3rd March 2025
47AQI
4th March 2025
36AQI
5th March 2025
32AQI
6th March 2025
36AQI
7th March 2025
33AQI
8th March 2025
38AQI
9th March 2025
39AQI
10th March 2025
41AQI
11th March 2025
44AQI
12th March 2025
45AQI
13th March 2025
54AQI
14th March 2025
37AQI
15th March 2025
39AQI
16th March 2025
26AQI
17th March 2025
45AQI
18th March 2025
34AQI
19th March 2025
40AQI
20th March 2025
42AQI
21st March 2025
53AQI
22nd March 2025
57AQI
23rd March 2025
60AQI
24th March 2025
51AQI
25th March 2025
68AQI
26th March 2025
65AQI
27th March 2025
53AQI
28th March 2025
58AQI
29th March 2025
48AQI
30th March 2025
40AQI
31st March 2025
37AQI
1st April 2025
40AQI
2nd April 2025
34AQI
3rd April 2025
33AQI
4th April 2025
33AQI
5th April 2025
39AQI
6th April 2025
45AQI
7th April 2025
38AQI
8th April 2025
36AQI
9th April 2025
53AQI
10th April 2025
49AQI
11th April 2025
55AQI
12th April 2025
53AQI
13th April 2025
43AQI
14th April 2025
48AQI
15th April 2025
28AQI
16th April 2025
44AQI
17th April 2025
45AQI
18th April 2025
53AQI
19th April 2025
50AQI
20th April 2025
38AQI
21st April 2025
45AQI
22nd April 2025
34AQI
23rd April 2025
30AQI
24th April 2025
37AQI
25th April 2025
51AQI
26th April 2025
48AQI
27th April 2025
48AQI
28th April 2025
46AQI
29th April 2025
46AQI
30th April 2025
48AQI
1st May 2025
45AQI
2nd May 2025
38AQI
3rd May 2025
44AQI
4th May 2025
37AQI
5th May 2025
39AQI
6th May 2025
35AQI
7th May 2025
32AQI
8th May 2025
37AQI
9th May 2025
32AQI
10th May 2025
37AQI
11th May 2025
35AQI
12th May 2025
49AQI
13th May 2025
53AQI
14th May 2025
58AQI
15th May 2025
53AQI
16th May 2025
49AQI
17th May 2025
40AQI
18th May 2025
50AQI
19th May 2025
56AQI
20th May 2025
57AQI
21st May 2025
37AQI
22nd May 2025
42AQI
23rd May 2025
43AQI
24th May 2025
33AQI
25th May 2025
30AQI
26th May 2025
32AQI
27th May 2025
39AQI
28th May 2025
39AQI
29th May 2025
38AQI
30th May 2025
39AQI
31st May 2025
38AQI
1st June 2025
46AQI
2nd June 2025
47AQI
3rd June 2025
30AQI
4th June 2025
42AQI
5th June 2025
41AQI
6th June 2025
52AQI
7th June 2025
57AQI
8th June 2025
56AQI
9th June 2025
35AQI
10th June 2025
33AQI
11th June 2025
42AQI
12th June 2025
44AQI
13th June 2025
44AQI
14th June 2025
34AQI
15th June 2025
30AQI
16th June 2025
30AQI
17th June 2025
35AQI
18th June 2025
40AQI
19th June 2025
42AQI
20th June 2025
54AQI
21st June 2025
52AQI
22nd June 2025
45AQI
23rd June 2025
37AQI
24th June 2025
38AQI
25th June 2025
39AQI
26th June 2025
41AQI
27th June 2025
46AQI
28th June 2025
46AQI
29th June 2025
49AQI
30th June 2025
51AQI
1st July 2025
59AQI
2nd July 2025
82AQI
3rd July 2025
95AQI
4th July 2025
99AQI
5th July 2025
91AQI
6th July 2025
71AQI
7th July 2025
64AQI
8th July 2025
69AQI
9th July 2025
77AQI
10th July 2025
69AQI
11th July 2025
48AQI
12th July 2025
46AQI
13th July 2025
41AQI
14th July 2025
39AQI
15th July 2025
51AQI
16th July 2025
52AQI
17th July 2025
41AQI
18th July 2025
35AQI
19th July 2025
34AQI
20th July 2025
31AQI
21st July 2025
28AQI
22nd July 2025
28AQI
23rd July 2025
27AQI
24th July 2025
24AQI
25th July 2025
23AQI
26th July 2025
23AQI
27th July 2025
23AQI
28th July 2025
23AQI
29th July 2025
22AQI
30th July 2025
22AQI
31st July 2025
30AQI
1st August 2025
41AQI
2nd August 2025
45AQI
3rd August 2025
44AQI

38AQI

36AQI

46AQI

43AQI

41AQI

43AQI

47AQI

43AQI

No. of days

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

202542AQI

27
4
26
2
20
11
25
5
26
5
24
6
19
12
3
170
45

Highest AQI recorded in

July

47AQI

Lowest AQI recorded in

February

36AQI

202436AQI

31
27
2
30
1
27
3
28
3
30
29
2
25
6
26
4
31
27
3
31
342
24

Highest AQI recorded in

April

43AQI

Lowest AQI recorded in

December

31AQI

202337AQI

29
2
27
1
25
6
21
9
26
5
24
6
30
31
28
2
30
1
28
1
31
330
33

Highest AQI recorded in

April

46AQI

Lowest AQI recorded in

August

29AQI

202238AQI

28
3
19
2
23
8
27
3
23
8
25
5
20
4
2
1
29
28
3
28
2
31
283
39

Highest AQI recorded in

May

47AQI

Lowest AQI recorded in

December

33AQI

202136AQI

28
3
25
3
25
4
18
3
27
4
21
9
27
4
30
1
25
5
30
1
24
6
31
311
43

Highest AQI recorded in

June

44AQI

Lowest AQI recorded in

August

31AQI

202039AQI

10
3
16
5
13
5
20
10
27
4
16
14
1
18
1
29
2
28
2
26
5
203
51
1

Highest AQI recorded in

August

53AQI

Lowest AQI recorded in

December

32AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
42AQI
Least Polluted Year Recorded
2024(Avg.)
36AQI

Usuki's annual 2025 AQI (42) shows an average percentage change of 13.2% (worsened AQI) compared to previous years: 2020 (39), 2021 (36), 2022 (38), 2023 (37), 2024 (36).