Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Yachimata, Chiba, 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

Yachimata, Chiba, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2025
60AQI
Lowest AQI recorded on
21st Aug 2023
8AQI

Same Day Analysis (1st August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 58 of Moderate air quality on the same day.

Day & Night AQI Trend: 31st Jul - 1st Aug 2026

Yachimata, Chiba, Japan

AQI
Day
Night
.

4 AM31st Jul 2026

6 PM

3 AM1st Aug 2026

Day time
Avg. Highest Time
1PM31st Jul

54AQI

Avg. Lowest Time
9AM31st Jul

38AQI

Night time
Avg. Highest Time
12AM1st Aug

48AQI

Avg. Lowest Time
1AM1st Aug

42AQI

In the last 24 hours,

Yachimata's AQI reached its highest point of 54 at 1 PM during the Day, while the lowest point, 38, was recorded at 9 AM during the Day between 31st Jul and 1st Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Yachimata, Chiba, Japan

JulAug
03rd - 04th04th - 05th05th - 06th06th - 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
Day
Night
3rd Jul 202684 AMAQI
3rd Jul 202685 AMAQI
3rd Jul 202686 AMAQI
3rd Jul 2026107 AMAQI
3rd Jul 202688 AMAQI
3rd Jul 2026109 AMAQI
3rd Jul 20261210 AMAQI
3rd Jul 20261711 AMAQI
3rd Jul 20261712 PMAQI
3rd Jul 2026171 PMAQI
3rd Jul 2026172 PMAQI
3rd Jul 2026213 PMAQI
3rd Jul 2026244 PMAQI
3rd Jul 2026265 PMAQI
3rd Jul 2026236 PMAQI
3rd Jul 2026247 PMAQI
3rd Jul 2026278 PMAQI
3rd Jul 2026269 PMAQI
3rd Jul 20262810 PMAQI
3rd Jul 20263111 PMAQI
4th Jul 20263512 AMAQI
4th Jul 2026341 AMAQI
4th Jul 2026532 AMAQI
4th Jul 2026543 AMAQI

22°C20/25°C

4th Jul 2026574 AMAQI
4th Jul 2026625 AMAQI
4th Jul 2026626 AMAQI
4th Jul 2026527 AMAQI
4th Jul 2026388 AMAQI
4th Jul 2026259 AMAQI
4th Jul 20262710 AMAQI
4th Jul 20262711 AMAQI
4th Jul 20262912 PMAQI
4th Jul 2026251 PMAQI
4th Jul 2026292 PMAQI
4th Jul 2026253 PMAQI
4th Jul 2026254 PMAQI
4th Jul 2026235 PMAQI
4th Jul 2026176 PMAQI
4th Jul 2026217 PMAQI
4th Jul 2026198 PMAQI
4th Jul 2026129 PMAQI
4th Jul 20261210 PMAQI
4th Jul 20261011 PMAQI
5th Jul 20261012 AMAQI
5th Jul 2026121 AMAQI
5th Jul 2026122 AMAQI
5th Jul 2026173 AMAQI

23°C20/26°C

5th Jul 2026124 AMAQI
5th Jul 2026125 AMAQI
5th Jul 2026106 AMAQI
5th Jul 2026107 AMAQI
5th Jul 2026108 AMAQI
5th Jul 2026149 AMAQI
5th Jul 20261410 AMAQI
5th Jul 20262911 AMAQI
5th Jul 20262512 PMAQI
5th Jul 2026251 PMAQI
5th Jul 2026312 PMAQI
5th Jul 2026193 PMAQI
5th Jul 2026274 PMAQI
5th Jul 2026385 PMAQI
5th Jul 2026346 PMAQI
5th Jul 2026317 PMAQI
5th Jul 2026318 PMAQI
5th Jul 2026299 PMAQI
5th Jul 20262910 PMAQI
5th Jul 20262711 PMAQI
6th Jul 20262912 AMAQI
6th Jul 2026291 AMAQI
6th Jul 2026272 AMAQI
6th Jul 2026293 AMAQI

23°C21/25°C

6th Jul 2026254 AMAQI
6th Jul 2026275 AMAQI
6th Jul 2026256 AMAQI
6th Jul 2026257 AMAQI
6th Jul 2026268 AMAQI
6th Jul 2026199 AMAQI
6th Jul 20263010 AMAQI
6th Jul 20263811 AMAQI
6th Jul 20261812 PMAQI
6th Jul 2026181 PMAQI
6th Jul 2026222 PMAQI
6th Jul 2026243 PMAQI
6th Jul 2026234 PMAQI
6th Jul 2026185 PMAQI
6th Jul 2026196 PMAQI
6th Jul 2026207 PMAQI
6th Jul 2026268 PMAQI
6th Jul 2026289 PMAQI
6th Jul 20262610 PMAQI
6th Jul 20262911 PMAQI
7th Jul 20262812 AMAQI
7th Jul 2026301 AMAQI
7th Jul 2026302 AMAQI
7th Jul 2026303 AMAQI

22°C21/24°C

7th Jul 2026264 AMAQI
7th Jul 2026285 AMAQI
7th Jul 2026286 AMAQI
7th Jul 2026287 AMAQI
7th Jul 2026268 AMAQI
7th Jul 2026269 AMAQI
7th Jul 20262310 AMAQI
7th Jul 20262211 AMAQI
7th Jul 20262012 PMAQI
7th Jul 2026221 PMAQI
7th Jul 2026242 PMAQI
7th Jul 2026283 PMAQI
7th Jul 2026254 PMAQI
7th Jul 2026265 PMAQI
7th Jul 2026266 PMAQI
7th Jul 2026277 PMAQI
7th Jul 2026248 PMAQI
7th Jul 2026269 PMAQI
7th Jul 20262810 PMAQI
7th Jul 20262411 PMAQI
8th Jul 20262812 AMAQI
8th Jul 2026291 AMAQI
8th Jul 2026282 AMAQI
8th Jul 2026273 AMAQI

24°C20/28°C

8th Jul 2026244 AMAQI
8th Jul 2026265 AMAQI
8th Jul 2026266 AMAQI
8th Jul 2026267 AMAQI
8th Jul 2026268 AMAQI
8th Jul 2026259 AMAQI
8th Jul 20262510 AMAQI
8th Jul 20262211 AMAQI
8th Jul 20262212 PMAQI
8th Jul 2026231 PMAQI
8th Jul 2026242 PMAQI
8th Jul 2026283 PMAQI
8th Jul 2026264 PMAQI
8th Jul 2026235 PMAQI
8th Jul 2026146 PMAQI
8th Jul 2026137 PMAQI
8th Jul 2026198 PMAQI
8th Jul 2026159 PMAQI
8th Jul 20262210 PMAQI
8th Jul 20261411 PMAQI
9th Jul 2026812 AMAQI
9th Jul 2026251 AMAQI
9th Jul 2026282 AMAQI
9th Jul 2026183 AMAQI

24°C20/29°C

9th Jul 2026184 AMAQI
9th Jul 2026245 AMAQI
9th Jul 2026256 AMAQI
9th Jul 2026267 AMAQI
9th Jul 2026198 AMAQI
9th Jul 2026189 AMAQI
9th Jul 20262210 AMAQI
9th Jul 20262111 AMAQI
9th Jul 20262212 PMAQI
9th Jul 2026221 PMAQI
9th Jul 2026212 PMAQI
9th Jul 2026263 PMAQI
9th Jul 2026254 PMAQI
9th Jul 2026225 PMAQI
9th Jul 2026236 PMAQI
9th Jul 2026227 PMAQI
9th Jul 2026168 PMAQI
9th Jul 2026189 PMAQI
9th Jul 20262410 PMAQI
9th Jul 20262411 PMAQI
10th Jul 20262412 AMAQI
10th Jul 2026251 AMAQI
10th Jul 2026262 AMAQI
10th Jul 2026163 AMAQI

25°C21/30°C

10th Jul 2026244 AMAQI
10th Jul 2026165 AMAQI
10th Jul 2026186 AMAQI
10th Jul 2026167 AMAQI
10th Jul 2026208 AMAQI
10th Jul 2026209 AMAQI
10th Jul 20263010 AMAQI
10th Jul 20262411 AMAQI
10th Jul 20262512 PMAQI
10th Jul 2026221 PMAQI
10th Jul 2026222 PMAQI
10th Jul 2026223 PMAQI
10th Jul 2026244 PMAQI
10th Jul 2026295 PMAQI
10th Jul 2026266 PMAQI
10th Jul 2026287 PMAQI
10th Jul 2026288 PMAQI
10th Jul 2026209 PMAQI
10th Jul 20262810 PMAQI
10th Jul 20263011 PMAQI
11th Jul 20263012 AMAQI
11th Jul 202681 AMAQI
11th Jul 2026182 AMAQI
11th Jul 202683 AMAQI

26°C22/31°C

11th Jul 202684 AMAQI
11th Jul 202685 AMAQI
11th Jul 202686 AMAQI
11th Jul 202687 AMAQI
11th Jul 2026338 AMAQI
11th Jul 2026309 AMAQI
11th Jul 20263310 AMAQI
11th Jul 20262411 AMAQI
11th Jul 20262612 PMAQI
11th Jul 2026221 PMAQI
11th Jul 2026232 PMAQI
11th Jul 2026213 PMAQI
11th Jul 2026244 PMAQI
11th Jul 2026285 PMAQI
11th Jul 2026296 PMAQI
11th Jul 2026287 PMAQI
11th Jul 2026238 PMAQI
11th Jul 2026289 PMAQI
11th Jul 20261710 PMAQI
11th Jul 20262711 PMAQI
12th Jul 20262812 AMAQI
12th Jul 2026201 AMAQI
12th Jul 2026212 AMAQI
12th Jul 2026273 AMAQI

27°C23/31°C

12th Jul 2026244 AMAQI
12th Jul 2026175 AMAQI
12th Jul 2026166 AMAQI
12th Jul 2026187 AMAQI
12th Jul 2026188 AMAQI
12th Jul 2026309 AMAQI
12th Jul 20263010 AMAQI
12th Jul 20262311 AMAQI
12th Jul 20262612 PMAQI
12th Jul 2026211 PMAQI
12th Jul 2026222 PMAQI
12th Jul 2026223 PMAQI
12th Jul 2026264 PMAQI
12th Jul 2026325 PMAQI
12th Jul 2026296 PMAQI
12th Jul 2026287 PMAQI
12th Jul 2026308 PMAQI
12th Jul 2026309 PMAQI
12th Jul 20263110 PMAQI
12th Jul 20263011 PMAQI
13th Jul 20263012 AMAQI
13th Jul 2026301 AMAQI
13th Jul 2026262 AMAQI
13th Jul 2026303 AMAQI

25°C23/28°C

13th Jul 2026304 AMAQI
13th Jul 2026325 AMAQI
13th Jul 2026286 AMAQI
13th Jul 2026317 AMAQI
13th Jul 2026328 AMAQI
13th Jul 2026339 AMAQI
13th Jul 20263110 AMAQI
13th Jul 20262911 AMAQI
13th Jul 20266012 PMAQI
13th Jul 2026621 PMAQI
13th Jul 2026632 PMAQI
13th Jul 2026563 PMAQI
13th Jul 2026534 PMAQI
13th Jul 2026525 PMAQI
13th Jul 2026486 PMAQI
13th Jul 2026507 PMAQI
13th Jul 2026488 PMAQI
13th Jul 2026489 PMAQI
13th Jul 20265110 PMAQI
13th Jul 20265211 PMAQI
14th Jul 20265312 AMAQI
14th Jul 2026541 AMAQI
14th Jul 2026502 AMAQI
14th Jul 2026413 AMAQI

26°C24/31°C

14th Jul 2026304 AMAQI
14th Jul 2026325 AMAQI
14th Jul 2026306 AMAQI
14th Jul 2026307 AMAQI
14th Jul 2026308 AMAQI
14th Jul 2026319 AMAQI
14th Jul 20263410 AMAQI
14th Jul 20262811 AMAQI
14th Jul 20262812 PMAQI
14th Jul 2026271 PMAQI
14th Jul 2026262 PMAQI
14th Jul 2026243 PMAQI
14th Jul 2026284 PMAQI
14th Jul 2026325 PMAQI
14th Jul 2026336 PMAQI
14th Jul 2026347 PMAQI
14th Jul 2026308 PMAQI
14th Jul 2026369 PMAQI
14th Jul 20263410 PMAQI
14th Jul 20263711 PMAQI
15th Jul 20263612 AMAQI
15th Jul 2026331 AMAQI
15th Jul 2026362 AMAQI
15th Jul 2026323 AMAQI

28°C23/32°C

15th Jul 2026294 AMAQI
15th Jul 2026325 AMAQI
15th Jul 2026316 AMAQI
15th Jul 2026347 AMAQI
15th Jul 2026328 AMAQI
15th Jul 2026339 AMAQI
15th Jul 20263210 AMAQI
15th Jul 20263011 AMAQI
15th Jul 20262812 PMAQI
15th Jul 2026271 PMAQI
15th Jul 2026262 PMAQI
15th Jul 2026363 PMAQI
15th Jul 2026464 PMAQI
15th Jul 2026535 PMAQI
15th Jul 2026516 PMAQI
15th Jul 2026527 PMAQI
15th Jul 2026518 PMAQI
15th Jul 2026509 PMAQI
15th Jul 20265210 PMAQI
15th Jul 20265111 PMAQI
16th Jul 20265512 AMAQI
16th Jul 2026461 AMAQI
16th Jul 2026462 AMAQI
16th Jul 2026423 AMAQI

29°C25/34°C

16th Jul 2026624 AMAQI
16th Jul 2026635 AMAQI
16th Jul 2026596 AMAQI
16th Jul 2026687 AMAQI
16th Jul 2026698 AMAQI
16th Jul 2026689 AMAQI
16th Jul 20267610 AMAQI
16th Jul 20268111 AMAQI
16th Jul 20268212 PMAQI
16th Jul 2026851 PMAQI
16th Jul 2026882 PMAQI
16th Jul 2026873 PMAQI
16th Jul 2026904 PMAQI
16th Jul 2026855 PMAQI
16th Jul 2026766 PMAQI
16th Jul 2026727 PMAQI
16th Jul 2026648 PMAQI
16th Jul 2026609 PMAQI
16th Jul 20265810 PMAQI
16th Jul 20265611 PMAQI
17th Jul 20265512 AMAQI
17th Jul 2026541 AMAQI
17th Jul 2026552 AMAQI
17th Jul 2026543 AMAQI

29°C26/32°C

17th Jul 2026534 AMAQI
17th Jul 2026565 AMAQI
17th Jul 2026556 AMAQI
17th Jul 2026547 AMAQI
17th Jul 2026558 AMAQI
17th Jul 2026519 AMAQI
17th Jul 20265410 AMAQI
17th Jul 20265311 AMAQI
17th Jul 20265012 PMAQI
17th Jul 2026441 PMAQI
17th Jul 2026522 PMAQI
17th Jul 2026483 PMAQI
17th Jul 2026504 PMAQI
17th Jul 2026445 PMAQI
17th Jul 2026366 PMAQI
17th Jul 2026387 PMAQI
17th Jul 2026318 PMAQI
17th Jul 2026299 PMAQI
17th Jul 20262710 PMAQI
17th Jul 20262111 PMAQI
18th Jul 20261912 AMAQI
18th Jul 2026161 AMAQI
18th Jul 2026142 AMAQI
18th Jul 202683 AMAQI

28°C26/31°C

18th Jul 2026114 AMAQI
18th Jul 202685 AMAQI
18th Jul 202686 AMAQI
18th Jul 2026107 AMAQI
18th Jul 2026108 AMAQI
18th Jul 202689 AMAQI
18th Jul 2026810 AMAQI
18th Jul 20262311 AMAQI
18th Jul 2026712 PMAQI
18th Jul 202681 PMAQI
18th Jul 2026122 PMAQI
18th Jul 2026173 PMAQI
18th Jul 2026124 PMAQI
18th Jul 2026125 PMAQI
18th Jul 2026126 PMAQI
18th Jul 202667 PMAQI
18th Jul 202688 PMAQI
18th Jul 2026279 PMAQI
18th Jul 20262710 PMAQI
18th Jul 20262711 PMAQI
19th Jul 20262312 AMAQI
19th Jul 2026231 AMAQI
19th Jul 2026252 AMAQI
19th Jul 2026253 AMAQI

27°C24/30°C

19th Jul 2026254 AMAQI
19th Jul 2026235 AMAQI
19th Jul 2026236 AMAQI
19th Jul 2026297 AMAQI
19th Jul 2026238 AMAQI
19th Jul 2026259 AMAQI
19th Jul 20262510 AMAQI
19th Jul 20262511 AMAQI
19th Jul 20262912 PMAQI
19th Jul 2026291 PMAQI
19th Jul 2026252 PMAQI
19th Jul 2026213 PMAQI
19th Jul 2026214 PMAQI
19th Jul 2026235 PMAQI
19th Jul 2026256 PMAQI
19th Jul 2026257 PMAQI
19th Jul 2026258 PMAQI
19th Jul 2026239 PMAQI
19th Jul 20262510 PMAQI
19th Jul 20262711 PMAQI
20th Jul 20262112 AMAQI
20th Jul 2026211 AMAQI
20th Jul 2026232 AMAQI
20th Jul 2026253 AMAQI

27°C24/30°C

20th Jul 2026234 AMAQI
20th Jul 2026235 AMAQI
20th Jul 2026296 AMAQI
20th Jul 2026297 AMAQI
20th Jul 2026258 AMAQI
20th Jul 2026259 AMAQI
20th Jul 20262510 AMAQI
20th Jul 20262911 AMAQI
20th Jul 20262112 PMAQI
20th Jul 2026211 PMAQI
20th Jul 2026232 PMAQI
20th Jul 2026383 PMAQI
20th Jul 2026514 PMAQI
20th Jul 2026445 PMAQI
20th Jul 2026386 PMAQI
20th Jul 2026427 PMAQI
20th Jul 2026408 PMAQI
20th Jul 2026409 PMAQI
20th Jul 20264010 PMAQI
20th Jul 20263811 PMAQI
21st Jul 20263412 AMAQI
21st Jul 2026331 AMAQI
21st Jul 2026332 AMAQI
21st Jul 2026343 AMAQI

30°C25/36°C

21st Jul 2026384 AMAQI
21st Jul 2026385 AMAQI
21st Jul 2026366 AMAQI
21st Jul 2026337 AMAQI
21st Jul 2026368 AMAQI
21st Jul 2026409 AMAQI
21st Jul 20265210 AMAQI
21st Jul 20265411 AMAQI
21st Jul 2026541 PMAQI
21st Jul 2026522 PMAQI
21st Jul 2026573 PMAQI
21st Jul 2026584 PMAQI
21st Jul 2026585 PMAQI
21st Jul 2026546 PMAQI
21st Jul 2026887 PMAQI
21st Jul 2026548 PMAQI
21st Jul 2026559 PMAQI
21st Jul 20265510 PMAQI
21st Jul 20265211 PMAQI
22nd Jul 20265112 AMAQI
22nd Jul 2026521 AMAQI
22nd Jul 2026552 AMAQI
22nd Jul 2026563 AMAQI

31°C26/37°C

22nd Jul 2026584 AMAQI
22nd Jul 2026595 AMAQI
22nd Jul 2026576 AMAQI
22nd Jul 2026577 AMAQI
22nd Jul 2026608 AMAQI
22nd Jul 2026649 AMAQI
22nd Jul 20266410 AMAQI
22nd Jul 20267011 AMAQI
22nd Jul 20268812 PMAQI
22nd Jul 2026961 PMAQI
22nd Jul 20261022 PMAQI
22nd Jul 2026923 PMAQI
22nd Jul 2026814 PMAQI
22nd Jul 2026715 PMAQI
22nd Jul 2026706 PMAQI
22nd Jul 2026707 PMAQI
22nd Jul 2026698 PMAQI
22nd Jul 2026729 PMAQI
22nd Jul 20266610 PMAQI
22nd Jul 20267311 PMAQI
23rd Jul 20268612 AMAQI
23rd Jul 2026801 AMAQI
23rd Jul 2026742 AMAQI
23rd Jul 2026743 AMAQI

31°C27/36°C

23rd Jul 2026704 AMAQI
23rd Jul 2026665 AMAQI
23rd Jul 2026606 AMAQI
23rd Jul 2026647 AMAQI
23rd Jul 2026678 AMAQI
23rd Jul 2026669 AMAQI
23rd Jul 20267110 AMAQI
23rd Jul 20268111 AMAQI
23rd Jul 20267612 PMAQI
23rd Jul 2026781 PMAQI
23rd Jul 2026722 PMAQI
23rd Jul 2026653 PMAQI
23rd Jul 2026664 PMAQI
23rd Jul 2026535 PMAQI
23rd Jul 2026366 PMAQI
23rd Jul 2026337 PMAQI
23rd Jul 2026298 PMAQI
23rd Jul 2026259 PMAQI
23rd Jul 20262710 PMAQI
23rd Jul 20263111 PMAQI
24th Jul 20262712 AMAQI
24th Jul 2026231 AMAQI
24th Jul 2026232 AMAQI
24th Jul 2026213 AMAQI

31°C27/35°C

24th Jul 2026254 AMAQI
24th Jul 2026365 AMAQI
24th Jul 2026366 AMAQI
24th Jul 2026427 AMAQI
24th Jul 2026468 AMAQI
24th Jul 2026309 AMAQI
24th Jul 20261710 AMAQI
24th Jul 20263111 AMAQI
24th Jul 20263112 PMAQI
24th Jul 2026291 PMAQI
24th Jul 2026252 PMAQI
24th Jul 2026293 PMAQI
24th Jul 2026344 PMAQI
24th Jul 2026235 PMAQI
24th Jul 2026316 PMAQI
24th Jul 2026277 PMAQI
24th Jul 2026278 PMAQI
24th Jul 2026209 PMAQI
24th Jul 20261910 PMAQI
24th Jul 20262011 PMAQI
25th Jul 20261712 AMAQI
25th Jul 2026181 AMAQI
25th Jul 2026212 AMAQI
25th Jul 2026273 AMAQI

28°C25/32°C

25th Jul 2026264 AMAQI
25th Jul 2026285 AMAQI
25th Jul 2026266 AMAQI
25th Jul 2026327 AMAQI
25th Jul 2026278 AMAQI
25th Jul 2026349 AMAQI
25th Jul 20264310 AMAQI
25th Jul 20265311 AMAQI
25th Jul 20265312 PMAQI
25th Jul 2026461 PMAQI
25th Jul 2026442 PMAQI
25th Jul 2026443 PMAQI
25th Jul 2026334 PMAQI
25th Jul 2026315 PMAQI
25th Jul 2026296 PMAQI
25th Jul 2026337 PMAQI
25th Jul 2026368 PMAQI
25th Jul 2026219 PMAQI
25th Jul 20262110 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262112 AMAQI
26th Jul 2026211 AMAQI
26th Jul 2026382 AMAQI
26th Jul 2026363 AMAQI

27°C23/31°C

26th Jul 2026384 AMAQI
26th Jul 2026405 AMAQI
26th Jul 2026386 AMAQI
26th Jul 2026297 AMAQI
26th Jul 2026338 AMAQI
26th Jul 2026259 AMAQI
26th Jul 20262710 AMAQI
26th Jul 20262511 AMAQI
26th Jul 20262512 PMAQI
26th Jul 2026331 PMAQI
26th Jul 2026422 PMAQI
26th Jul 2026483 PMAQI
26th Jul 2026364 PMAQI
26th Jul 2026295 PMAQI
26th Jul 2026296 PMAQI
26th Jul 2026277 PMAQI
26th Jul 2026338 PMAQI
26th Jul 2026299 PMAQI
26th Jul 20262910 PMAQI
26th Jul 20262511 PMAQI
27th Jul 20262312 AMAQI
27th Jul 2026251 AMAQI
27th Jul 2026212 AMAQI
27th Jul 2026233 AMAQI

27°C23/31°C

27th Jul 2026214 AMAQI
27th Jul 2026235 AMAQI
27th Jul 2026216 AMAQI
27th Jul 2026307 AMAQI
27th Jul 2026338 AMAQI
27th Jul 2026349 AMAQI
27th Jul 20263410 AMAQI
27th Jul 20263411 AMAQI
27th Jul 20262912 PMAQI
27th Jul 2026271 PMAQI
27th Jul 2026252 PMAQI
27th Jul 2026253 PMAQI
27th Jul 2026254 PMAQI
27th Jul 2026295 PMAQI
27th Jul 2026296 PMAQI
27th Jul 2026257 PMAQI
27th Jul 2026238 PMAQI
27th Jul 2026219 PMAQI
27th Jul 20262310 PMAQI
27th Jul 20262511 PMAQI
28th Jul 20262512 AMAQI
28th Jul 2026251 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026253 AMAQI

25°C23/29°C

28th Jul 2026274 AMAQI
28th Jul 2026275 AMAQI
28th Jul 2026276 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026258 AMAQI
28th Jul 2026279 AMAQI
28th Jul 20263110 AMAQI
28th Jul 20262911 AMAQI
28th Jul 20262712 PMAQI
28th Jul 2026271 PMAQI
28th Jul 2026292 PMAQI
28th Jul 2026313 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026275 PMAQI
28th Jul 2026256 PMAQI
28th Jul 2026367 PMAQI
28th Jul 2026388 PMAQI
28th Jul 2026489 PMAQI
28th Jul 20262910 PMAQI
28th Jul 20264411 PMAQI
29th Jul 20264212 AMAQI
29th Jul 2026341 AMAQI
29th Jul 2026382 AMAQI
29th Jul 2026363 AMAQI

26°C22/29°C

29th Jul 2026384 AMAQI
29th Jul 2026445 AMAQI
29th Jul 2026486 AMAQI
29th Jul 2026467 AMAQI
29th Jul 2026448 AMAQI
29th Jul 2026449 AMAQI
29th Jul 20263610 AMAQI
29th Jul 20263211 AMAQI
29th Jul 20262912 PMAQI
29th Jul 2026251 PMAQI
29th Jul 2026232 PMAQI
29th Jul 2026253 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026255 PMAQI
29th Jul 2026256 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026238 PMAQI
29th Jul 2026259 PMAQI
29th Jul 20262910 PMAQI
29th Jul 20262911 PMAQI
30th Jul 20262912 AMAQI
30th Jul 2026291 AMAQI
30th Jul 2026272 AMAQI
30th Jul 2026253 AMAQI

28°C24/34°C

30th Jul 2026254 AMAQI
30th Jul 2026275 AMAQI
30th Jul 2026296 AMAQI
30th Jul 2026297 AMAQI
30th Jul 2026348 AMAQI
30th Jul 2026299 AMAQI
30th Jul 20262910 AMAQI
30th Jul 20262911 AMAQI
30th Jul 20263112 PMAQI
30th Jul 2026381 PMAQI
30th Jul 2026442 PMAQI
30th Jul 2026473 PMAQI
30th Jul 2026534 PMAQI
30th Jul 2026535 PMAQI
30th Jul 2026546 PMAQI
30th Jul 2026527 PMAQI
30th Jul 2026468 PMAQI
30th Jul 2026489 PMAQI
30th Jul 20264810 PMAQI
30th Jul 20265511 PMAQI
31st Jul 20265512 AMAQI
31st Jul 2026491 AMAQI
31st Jul 2026402 AMAQI
31st Jul 2026383 AMAQI

30°C26/36°C

31st Jul 2026404 AMAQI
31st Jul 2026405 AMAQI
31st Jul 2026406 AMAQI
31st Jul 2026387 AMAQI
31st Jul 2026388 AMAQI
31st Jul 2026389 AMAQI
31st Jul 20264010 AMAQI
31st Jul 20264211 AMAQI
31st Jul 20265012 PMAQI
31st Jul 2026541 PMAQI
31st Jul 2026482 PMAQI
31st Jul 2026483 PMAQI
31st Jul 2026524 PMAQI
31st Jul 2026485 PMAQI
31st Jul 2026486 PMAQI
31st Jul 2026467 PMAQI
31st Jul 2026428 PMAQI
31st Jul 2026469 PMAQI
31st Jul 20264410 PMAQI
31st Jul 20264611 PMAQI
1st Aug 20264812 AMAQI
1st Aug 2026421 AMAQI
1st Aug 2026442 AMAQI
1st Aug 2026483 AMAQI

29°C26/34°C

1st Aug 2026524 AMAQI
4 AM
1st Aug 2026515 AMAQI
1st Aug 2026506 AMAQI
1st Aug 2026517 AMAQI
1st Aug 2026528 AMAQI
1st Aug 2026609 AMAQI
1st Aug 20266210 AMAQI
1st Aug 20265911 AMAQI
11 AM
1st Aug 20266312 PMAQI
1st Aug 2026641 PMAQI
1st Aug 2026642 PMAQI
1st Aug 2026643 PMAQI
1st Aug 2026604 PMAQI
1st Aug 2026625 PMAQI
1st Aug 2026676 PMAQI
6 PM
1st Aug 2026687 PMAQI
1st Aug 2026658 PMAQI
1st Aug 2026659 PMAQI
1st Aug 20266510 PMAQI
1st Aug 20266811 PMAQI
11 PM
3 AM

30°C26/35°C

Day time
Avg. Highest Time
10 AM - 5 PM

37AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
4 AM

32AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 5 PM (Avg. 37), while the lowest AQI was between 4 AM to 4 AM (Avg. 32).
Night time
Avg. Highest Time
7 PM

36AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
1 AM

31AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 7 PM (Avg. 36), while the lowest AQI was between 1 AM to 1 AM (Avg. 31).

2026 Days Vs Air Quality

Yachimata, Chiba, Japan

2026

88%

187

12%

26

Total number of days with different AQI categories in last 213 days in 2026 (152 days remaining)

Good
187 Days
Moderate
26 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 88%

Health Risk Level:

Low

In 2026, 88% of 213 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

Yachimata, Chiba, Japan

AQI levels in 2026

AQI (US)
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 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
15AQI (US)
2nd January 2026
14AQI (US)
3rd January 2026
17AQI (US)
4th January 2026
27AQI (US)
5th January 2026
46AQI (US)
6th January 2026
28AQI (US)
7th January 2026
36AQI (US)
8th January 2026
36AQI (US)
9th January 2026
17AQI (US)
10th January 2026
37AQI (US)
11th January 2026
33AQI (US)
12th January 2026
20AQI (US)
13th January 2026
40AQI (US)
14th January 2026
15AQI (US)
15th January 2026
30AQI (US)
16th January 2026
45AQI (US)
17th January 2026
50AQI (US)
18th January 2026
29AQI (US)
19th January 2026
37AQI (US)
20th January 2026
35AQI (US)
21st January 2026
12AQI (US)
22nd January 2026
25AQI (US)
23rd January 2026
37AQI (US)
24th January 2026
40AQI (US)
25th January 2026
18AQI (US)
26th January 2026
20AQI (US)
27th January 2026
43AQI (US)
28th January 2026
34AQI (US)
29th January 2026
17AQI (US)
30th January 2026
31AQI (US)
31st January 2026
36AQI (US)
1st February 2026
41AQI (US)
2nd February 2026
39AQI (US)
3rd February 2026
19AQI (US)
4th February 2026
45AQI (US)
5th February 2026
63AQI (US)
6th February 2026
62AQI (US)
7th February 2026
12AQI (US)
8th February 2026
10AQI (US)
9th February 2026
34AQI (US)
10th February 2026
36AQI (US)
11th February 2026
62AQI (US)
12th February 2026
38AQI (US)
13th February 2026
45AQI (US)
14th February 2026
61AQI (US)
15th February 2026
53AQI (US)
16th February 2026
48AQI (US)
17th February 2026
17AQI (US)
18th February 2026
31AQI (US)
19th February 2026
29AQI (US)
20th February 2026
20AQI (US)
21st February 2026
42AQI (US)
22nd February 2026
41AQI (US)
23rd February 2026
28AQI (US)
24th February 2026
36AQI (US)
25th February 2026
16AQI (US)
26th February 2026
16AQI (US)
27th February 2026
43AQI (US)
28th February 2026
46AQI (US)
1st March 2026
37AQI (US)
2nd March 2026
82AQI (US)
3rd March 2026
43AQI (US)
4th March 2026
59AQI (US)
5th March 2026
57AQI (US)
6th March 2026
49AQI (US)
7th March 2026
46AQI (US)
8th March 2026
42AQI (US)
9th March 2026
49AQI (US)
10th March 2026
58AQI (US)
11th March 2026
57AQI (US)
12th March 2026
68AQI (US)
13th March 2026
42AQI (US)
14th March 2026
47AQI (US)
15th March 2026
58AQI (US)
16th March 2026
45AQI (US)
17th March 2026
30AQI (US)
18th March 2026
32AQI (US)
19th March 2026
39AQI (US)
20th March 2026
31AQI (US)
21st March 2026
43AQI (US)
22nd March 2026
50AQI (US)
23rd March 2026
48AQI (US)
24th March 2026
49AQI (US)
25th March 2026
47AQI (US)
26th March 2026
29AQI (US)
27th March 2026
28AQI (US)
28th March 2026
49AQI (US)
29th March 2026
54AQI (US)
30th March 2026
45AQI (US)
31st March 2026
18AQI (US)
1st April 2026
29AQI (US)
2nd April 2026
31AQI (US)
3rd April 2026
45AQI (US)
4th April 2026
44AQI (US)
5th April 2026
37AQI (US)
6th April 2026
28AQI (US)
7th April 2026
25AQI (US)
8th April 2026
24AQI (US)
9th April 2026
31AQI (US)
10th April 2026
47AQI (US)
11th April 2026
40AQI (US)
12th April 2026
26AQI (US)
13th April 2026
34AQI (US)
14th April 2026
40AQI (US)
15th April 2026
37AQI (US)
16th April 2026
33AQI (US)
17th April 2026
39AQI (US)
18th April 2026
32AQI (US)
19th April 2026
38AQI (US)
20th April 2026
36AQI (US)
21st April 2026
40AQI (US)
22nd April 2026
45AQI (US)
23rd April 2026
37AQI (US)
24th April 2026
32AQI (US)
25th April 2026
45AQI (US)
26th April 2026
51AQI (US)
27th April 2026
48AQI (US)
28th April 2026
42AQI (US)
29th April 2026
36AQI (US)
30th April 2026
18AQI (US)
1st May 2026
47AQI (US)
2nd May 2026
49AQI (US)
3rd May 2026
42AQI (US)
4th May 2026
31AQI (US)
5th May 2026
22AQI (US)
6th May 2026
30AQI (US)
7th May 2026
30AQI (US)
8th May 2026
22AQI (US)
9th May 2026
29AQI (US)
10th May 2026
20AQI (US)
11th May 2026
21AQI (US)
12th May 2026
33AQI (US)
13th May 2026
41AQI (US)
14th May 2026
39AQI (US)
15th May 2026
34AQI (US)
16th May 2026
85AQI (US)
17th May 2026
69AQI (US)
18th May 2026
53AQI (US)
19th May 2026
49AQI (US)
20th May 2026
62AQI (US)
21st May 2026
60AQI (US)
22nd May 2026
58AQI (US)
23rd May 2026
53AQI (US)
24th May 2026
58AQI (US)
25th May 2026
46AQI (US)
26th May 2026
39AQI (US)
27th May 2026
24AQI (US)
28th May 2026
25AQI (US)
29th May 2026
26AQI (US)
30th May 2026
19AQI (US)
31st May 2026
26AQI (US)
1st June 2026
30AQI (US)
2nd June 2026
29AQI (US)
3rd June 2026
27AQI (US)
4th June 2026
20AQI (US)
5th June 2026
22AQI (US)
6th June 2026
22AQI (US)
7th June 2026
22AQI (US)
8th June 2026
20AQI (US)
9th June 2026
22AQI (US)
10th June 2026
21AQI (US)
11th June 2026
24AQI (US)
12th June 2026
23AQI (US)
13th June 2026
41AQI (US)
14th June 2026
40AQI (US)
15th June 2026
12AQI (US)
16th June 2026
18AQI (US)
17th June 2026
23AQI (US)
18th June 2026
24AQI (US)
19th June 2026
28AQI (US)
20th June 2026
22AQI (US)
21st June 2026
20AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
21AQI (US)
24th June 2026
22AQI (US)
25th June 2026
26AQI (US)
26th June 2026
29AQI (US)
27th June 2026
26AQI (US)
28th June 2026
28AQI (US)
29th June 2026
27AQI (US)
30th June 2026
23AQI (US)
1st July 2026
32AQI (US)
2nd July 2026
18AQI (US)
3rd July 2026
16AQI (US)
4th July 2026
32AQI (US)
5th July 2026
21AQI (US)
6th July 2026
25AQI (US)
7th July 2026
26AQI (US)
8th July 2026
23AQI (US)
9th July 2026
22AQI (US)
10th July 2026
23AQI (US)
11th July 2026
21AQI (US)
12th July 2026
25AQI (US)
13th July 2026
42AQI (US)
14th July 2026
34AQI (US)
15th July 2026
38AQI (US)
16th July 2026
68AQI (US)
17th July 2026
47AQI (US)
18th July 2026
13AQI (US)
19th July 2026
25AQI (US)
20th July 2026
31AQI (US)
21st July 2026
48AQI (US)
22nd July 2026
69AQI (US)
23rd July 2026
60AQI (US)
24th July 2026
28AQI (US)
25th July 2026
32AQI (US)
26th July 2026
32AQI (US)
27th July 2026
26AQI (US)
28th July 2026
29AQI (US)
29th July 2026
33AQI (US)
30th July 2026
38AQI (US)
31st July 2026
45AQI (US)
1st August 2026
58AQI (US)
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

30AQI (US)

37AQI (US)

46AQI (US)

36AQI (US)

40AQI (US)

24AQI (US)

33AQI (US)

58AQI (US)

No. of days

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

202635AQI (US)

31
23
5
23
8
29
1
23
8
30
28
3
1
187
26

Highest AQI (US) recorded in

August

58AQI (US)

Lowest AQI (US) recorded in

June

24AQI (US)

202539AQI (US)

29
2
25
3
25
6
29
1
30
1
29
1
24
7
25
6
30
14
17
19
11
20
11
299
66

Highest AQI (US) recorded in

October

48AQI (US)

Lowest AQI (US) recorded in

June

31AQI (US)

202436AQI (US)

23
7
26
3
23
8
25
5
27
4
28
2
19
12
31
27
3
31
29
1
31
320
45

Highest AQI (US) recorded in

July

48AQI (US)

Lowest AQI (US) recorded in

August

26AQI (US)

202337AQI (US)

23
8
22
6
27
4
25
5
29
2
24
6
27
4
31
29
1
31
21
8
20
11
309
55

Highest AQI (US) recorded in

December

48AQI (US)

Lowest AQI (US) recorded in

August

24AQI (US)

202238AQI (US)

22
7
15
6
24
7
14
4
26
5
25
5
17
4
1
27
1
27
4
21
9
25
6
244
58

Highest AQI (US) recorded in

January

43AQI (US)

Lowest AQI (US) recorded in

August

22AQI (US)

202137AQI (US)

17
11
1
21
7
24
6
1
25
5
28
3
27
3
28
3
30
1
30
29
2
23
7
17
14
299
62
2

Highest AQI (US) recorded in

January

49AQI (US)

Lowest AQI (US) recorded in

August

27AQI (US)

202034AQI (US)

10
3
19
2
18
24
6
30
1
22
9
19
29
2
21
9
21
9
1
213
41
1

Highest AQI (US) recorded in

December

44AQI (US)

Lowest AQI (US) recorded in

September

24AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2025(Avg.)
39AQI (US)
Least Polluted Year Recorded
2020(Avg.)
34AQI (US)

Yachimata's annual 2026 AQI (US) (35) shows an average percentage change of -4.7% (improved AQI (US)) compared to previous years: 2020 (34), 2021 (37), 2022 (38), 2023 (37), 2024 (36), 2025 (39).