Koencho, Hokkaido, 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
Koencho, Hokkaido, Japan
2022
2023
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
24th Aug 2023
49AQILowest AQI recorded on
6th Aug 2023
9AQISame Day Analysis (14th August):
On this day, AQI across the 4 years varied significantly: 2026 ranks 2nd highest AQI at 27 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 13th Aug - 14th Aug 2026
Koencho, Hokkaido, Japan
AQI
Day
Night
.
4 AM13th Aug 2026
6 PM
3 AM14th Aug 2026
Day time
Avg. Highest Time
5PM13th Aug
31AQI
Avg. Lowest Time
8AM13th Aug
23AQI
Night time
Avg. Highest Time
7PM13th Aug
27AQI
Avg. Lowest Time
12AM14th Aug
23AQI
In the last 24 hours,
Koencho's AQI reached its highest point of 31 at 5 PM during the Day, while the lowest point, 23, was recorded at 12 AM during the Night between 13th Aug and 14th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Koencho, Hokkaido, Japan
JulAug
16th - 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 - 13th13th - 14th14th
Day
Night
16th Jul 2026264 AMAQI
16th Jul 2026255 AMAQI
16th Jul 2026286 AMAQI
16th Jul 2026277 AMAQI
16th Jul 2026208 AMAQI
16th Jul 2026209 AMAQI
16th Jul 20262910 AMAQI
16th Jul 20262511 AMAQI
16th Jul 20262412 PMAQI
16th Jul 2026221 PMAQI
16th Jul 2026222 PMAQI
16th Jul 2026223 PMAQI
16th Jul 2026204 PMAQI
16th Jul 2026235 PMAQI
16th Jul 2026286 PMAQI
16th Jul 2026277 PMAQI
16th Jul 2026248 PMAQI
16th Jul 2026269 PMAQI
16th Jul 20262510 PMAQI
16th Jul 20262811 PMAQI
17th Jul 20262812 AMAQI
17th Jul 2026251 AMAQI
17th Jul 2026252 AMAQI
17th Jul 2026263 AMAQI
23°C20/28°C
17th Jul 2026264 AMAQI
17th Jul 2026265 AMAQI
17th Jul 2026276 AMAQI
17th Jul 2026247 AMAQI
17th Jul 2026238 AMAQI
17th Jul 2026289 AMAQI
17th Jul 20262910 AMAQI
17th Jul 20262611 AMAQI
17th Jul 20262812 PMAQI
17th Jul 2026241 PMAQI
17th Jul 2026232 PMAQI
17th Jul 2026213 PMAQI
17th Jul 2026214 PMAQI
17th Jul 2026215 PMAQI
17th Jul 2026236 PMAQI
17th Jul 2026217 PMAQI
17th Jul 2026238 PMAQI
17th Jul 2026259 PMAQI
17th Jul 20262310 PMAQI
17th Jul 20262511 PMAQI
18th Jul 20262712 AMAQI
18th Jul 2026291 AMAQI
18th Jul 2026252 AMAQI
18th Jul 2026253 AMAQI
24°C18/31°C
18th Jul 2026274 AMAQI
18th Jul 2026295 AMAQI
18th Jul 2026316 AMAQI
18th Jul 2026257 AMAQI
18th Jul 2026258 AMAQI
18th Jul 2026259 AMAQI
18th Jul 20262310 AMAQI
18th Jul 20262111 AMAQI
18th Jul 20262712 PMAQI
18th Jul 2026231 PMAQI
18th Jul 2026292 PMAQI
18th Jul 2026313 PMAQI
18th Jul 2026294 PMAQI
18th Jul 2026315 PMAQI
18th Jul 2026386 PMAQI
18th Jul 2026367 PMAQI
18th Jul 2026298 PMAQI
18th Jul 2026319 PMAQI
18th Jul 20262910 PMAQI
18th Jul 20262911 PMAQI
19th Jul 20263112 AMAQI
19th Jul 2026291 AMAQI
19th Jul 2026332 AMAQI
19th Jul 2026293 AMAQI
22°C19/24°C
19th Jul 2026294 AMAQI
19th Jul 2026295 AMAQI
19th Jul 2026236 AMAQI
19th Jul 2026257 AMAQI
19th Jul 2026338 AMAQI
19th Jul 2026259 AMAQI
19th Jul 20262510 AMAQI
19th Jul 20262711 AMAQI
19th Jul 20262912 PMAQI
19th Jul 2026291 PMAQI
19th Jul 2026332 PMAQI
19th Jul 2026293 PMAQI
19th Jul 2026294 PMAQI
19th Jul 2026295 PMAQI
19th Jul 2026296 PMAQI
19th Jul 2026297 PMAQI
19th Jul 2026278 PMAQI
19th Jul 2026299 PMAQI
19th Jul 20262510 PMAQI
19th Jul 20262511 PMAQI
20th Jul 20262512 AMAQI
20th Jul 2026231 AMAQI
20th Jul 2026272 AMAQI
20th Jul 2026253 AMAQI
20°C18/22°C
20th Jul 2026254 AMAQI
20th Jul 2026215 AMAQI
20th Jul 2026256 AMAQI
20th Jul 2026257 AMAQI
20th Jul 2026238 AMAQI
20th Jul 2026239 AMAQI
20th Jul 20262510 AMAQI
20th Jul 20262111 AMAQI
20th Jul 20262512 PMAQI
20th Jul 2026291 PMAQI
20th Jul 2026292 PMAQI
20th Jul 2026253 PMAQI
20th Jul 2026254 PMAQI
20th Jul 2026295 PMAQI
20th Jul 2026296 PMAQI
20th Jul 2026297 PMAQI
20th Jul 2026278 PMAQI
20th Jul 2026259 PMAQI
20th Jul 20262710 PMAQI
20th Jul 20262111 PMAQI
21st Jul 20262512 AMAQI
21st Jul 2026251 AMAQI
21st Jul 2026252 AMAQI
21st Jul 2026233 AMAQI
21°C18/26°C
21st Jul 2026214 AMAQI
21st Jul 2026255 AMAQI
21st Jul 2026276 AMAQI
21st Jul 2026257 AMAQI
21st Jul 2026258 AMAQI
21st Jul 2026259 AMAQI
21st Jul 20262910 AMAQI
21st Jul 20262711 AMAQI
21st Jul 2026311 PMAQI
21st Jul 2026292 PMAQI
21st Jul 2026293 PMAQI
21st Jul 2026294 PMAQI
21st Jul 2026295 PMAQI
21st Jul 2026236 PMAQI
21st Jul 2026777 PMAQI
21st Jul 2026218 PMAQI
21st Jul 2026219 PMAQI
21st Jul 20262110 PMAQI
21st Jul 20262111 PMAQI
22nd Jul 20262112 AMAQI
22nd Jul 2026211 AMAQI
22nd Jul 2026212 AMAQI
22nd Jul 2026213 AMAQI
23°C17/29°C
22nd Jul 2026234 AMAQI
22nd Jul 2026255 AMAQI
22nd Jul 2026236 AMAQI
22nd Jul 2026277 AMAQI
22nd Jul 2026278 AMAQI
22nd Jul 2026299 AMAQI
22nd Jul 20262910 AMAQI
22nd Jul 20262511 AMAQI
22nd Jul 20262712 PMAQI
22nd Jul 2026271 PMAQI
22nd Jul 2026272 PMAQI
22nd Jul 2026253 PMAQI
22nd Jul 2026294 PMAQI
22nd Jul 2026275 PMAQI
22nd Jul 2026276 PMAQI
22nd Jul 2026257 PMAQI
22nd Jul 2026278 PMAQI
22nd Jul 2026259 PMAQI
22nd Jul 20262710 PMAQI
22nd Jul 20262311 PMAQI
23rd Jul 20262712 AMAQI
23rd Jul 2026231 AMAQI
23rd Jul 2026232 AMAQI
23rd Jul 2026233 AMAQI
19°C16/23°C
23rd Jul 2026254 AMAQI
23rd Jul 2026255 AMAQI
23rd Jul 2026236 AMAQI
23rd Jul 2026237 AMAQI
23rd Jul 2026218 AMAQI
23rd Jul 2026219 AMAQI
23rd Jul 20262110 AMAQI
23rd Jul 20262311 AMAQI
23rd Jul 20262112 PMAQI
23rd Jul 2026251 PMAQI
23rd Jul 2026212 PMAQI
23rd Jul 2026233 PMAQI
23rd Jul 2026214 PMAQI
23rd Jul 2026305 PMAQI
23rd Jul 2026346 PMAQI
23rd Jul 2026387 PMAQI
23rd Jul 2026368 PMAQI
23rd Jul 2026349 PMAQI
23rd Jul 20263110 PMAQI
23rd Jul 20263311 PMAQI
24th Jul 20263312 AMAQI
24th Jul 2026331 AMAQI
24th Jul 2026292 AMAQI
24th Jul 2026293 AMAQI
17°C14/21°C
24th Jul 2026274 AMAQI
24th Jul 2026275 AMAQI
24th Jul 2026296 AMAQI
24th Jul 2026297 AMAQI
24th Jul 2026278 AMAQI
24th Jul 2026239 AMAQI
24th Jul 20262510 AMAQI
24th Jul 20262911 AMAQI
24th Jul 20262512 PMAQI
24th Jul 2026271 PMAQI
24th Jul 2026312 PMAQI
24th Jul 2026343 PMAQI
24th Jul 2026334 PMAQI
24th Jul 2026315 PMAQI
24th Jul 2026296 PMAQI
24th Jul 2026277 PMAQI
24th Jul 2026278 PMAQI
24th Jul 2026299 PMAQI
24th Jul 20262510 PMAQI
24th Jul 20262311 PMAQI
25th Jul 20262512 AMAQI
25th Jul 2026251 AMAQI
25th Jul 2026252 AMAQI
25th Jul 2026233 AMAQI
15°C13/17°C
25th Jul 2026214 AMAQI
25th Jul 2026235 AMAQI
25th Jul 2026256 AMAQI
25th Jul 2026277 AMAQI
25th Jul 2026238 AMAQI
25th Jul 2026239 AMAQI
25th Jul 20262510 AMAQI
25th Jul 20262911 AMAQI
25th Jul 20262512 PMAQI
25th Jul 2026271 PMAQI
25th Jul 2026312 PMAQI
25th Jul 2026333 PMAQI
25th Jul 2026364 PMAQI
25th Jul 2026365 PMAQI
25th Jul 2026216 PMAQI
25th Jul 2026337 PMAQI
25th Jul 2026238 PMAQI
25th Jul 2026239 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262712 AMAQI
26th Jul 2026231 AMAQI
26th Jul 2026232 AMAQI
26th Jul 2026233 AMAQI
15°C14/17°C
26th Jul 2026254 AMAQI
26th Jul 2026275 AMAQI
26th Jul 2026236 AMAQI
26th Jul 2026217 AMAQI
26th Jul 2026218 AMAQI
26th Jul 2026259 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20262911 AMAQI
26th Jul 20263112 PMAQI
26th Jul 2026331 PMAQI
26th Jul 2026362 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026214 PMAQI
26th Jul 2026215 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026217 PMAQI
26th Jul 2026258 PMAQI
26th Jul 2026219 PMAQI
26th Jul 20262110 PMAQI
26th Jul 20262311 PMAQI
27th Jul 20262512 AMAQI
27th Jul 2026211 AMAQI
27th Jul 2026232 AMAQI
27th Jul 2026233 AMAQI
16°C12/21°C
27th Jul 2026254 AMAQI
27th Jul 2026235 AMAQI
27th Jul 2026236 AMAQI
27th Jul 2026257 AMAQI
27th Jul 2026258 AMAQI
27th Jul 2026279 AMAQI
27th Jul 20262710 AMAQI
27th Jul 20262711 AMAQI
27th Jul 20262912 PMAQI
27th Jul 2026291 PMAQI
27th Jul 2026292 PMAQI
27th Jul 2026313 PMAQI
27th Jul 2026274 PMAQI
27th Jul 2026255 PMAQI
27th Jul 2026256 PMAQI
27th Jul 2026257 PMAQI
27th Jul 2026258 PMAQI
27th Jul 2026279 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20262711 PMAQI
28th Jul 20262312 AMAQI
28th Jul 2026231 AMAQI
28th Jul 2026252 AMAQI
28th Jul 2026253 AMAQI
17°C12/23°C
28th Jul 2026234 AMAQI
28th Jul 2026255 AMAQI
28th Jul 2026256 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026258 AMAQI
28th Jul 2026279 AMAQI
28th Jul 20262910 AMAQI
28th Jul 20262111 AMAQI
28th Jul 20262112 PMAQI
28th Jul 2026211 PMAQI
28th Jul 2026252 PMAQI
28th Jul 2026293 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026275 PMAQI
28th Jul 2026296 PMAQI
28th Jul 2026297 PMAQI
28th Jul 2026298 PMAQI
28th Jul 2026279 PMAQI
28th Jul 20262510 PMAQI
28th Jul 20262711 PMAQI
29th Jul 20262712 AMAQI
29th Jul 2026271 AMAQI
29th Jul 2026232 AMAQI
29th Jul 2026253 AMAQI
19°C13/24°C
29th Jul 2026294 AMAQI
29th Jul 2026295 AMAQI
29th Jul 2026276 AMAQI
29th Jul 2026277 AMAQI
29th Jul 2026298 AMAQI
29th Jul 2026299 AMAQI
29th Jul 20262710 AMAQI
29th Jul 20262911 AMAQI
29th Jul 20262712 PMAQI
29th Jul 2026291 PMAQI
29th Jul 2026292 PMAQI
29th Jul 2026293 PMAQI
29th Jul 2026274 PMAQI
29th Jul 2026315 PMAQI
29th Jul 2026296 PMAQI
29th Jul 2026257 PMAQI
29th Jul 2026278 PMAQI
29th Jul 2026319 PMAQI
29th Jul 20262910 PMAQI
29th Jul 20262911 PMAQI
30th Jul 20262712 AMAQI
30th Jul 2026271 AMAQI
30th Jul 2026272 AMAQI
30th Jul 2026293 AMAQI
18°C13/23°C
30th Jul 2026274 AMAQI
30th Jul 2026295 AMAQI
30th Jul 2026256 AMAQI
30th Jul 2026277 AMAQI
30th Jul 2026258 AMAQI
30th Jul 2026239 AMAQI
30th Jul 20262510 AMAQI
30th Jul 20262311 AMAQI
30th Jul 20262512 PMAQI
30th Jul 2026251 PMAQI
30th Jul 2026232 PMAQI
30th Jul 2026213 PMAQI
30th Jul 2026234 PMAQI
30th Jul 2026255 PMAQI
30th Jul 2026256 PMAQI
30th Jul 2026257 PMAQI
30th Jul 2026218 PMAQI
30th Jul 2026219 PMAQI
30th Jul 20263010 PMAQI
30th Jul 20263011 PMAQI
31st Jul 20263812 AMAQI
31st Jul 2026361 AMAQI
31st Jul 2026402 AMAQI
31st Jul 2026363 AMAQI
16°C14/17°C
31st Jul 2026364 AMAQI
31st Jul 2026405 AMAQI
31st Jul 2026346 AMAQI
31st Jul 2026367 AMAQI
31st Jul 2026368 AMAQI
31st Jul 2026339 AMAQI
31st Jul 20263310 AMAQI
31st Jul 20262711 AMAQI
31st Jul 20262512 PMAQI
31st Jul 2026291 PMAQI
31st Jul 2026292 PMAQI
31st Jul 2026293 PMAQI
31st Jul 2026314 PMAQI
31st Jul 2026275 PMAQI
31st Jul 2026236 PMAQI
31st Jul 2026277 PMAQI
31st Jul 2026298 PMAQI
31st Jul 2026299 PMAQI
31st Jul 20262710 PMAQI
31st Jul 20262311 PMAQI
1st Aug 20262912 AMAQI
1st Aug 2026251 AMAQI
1st Aug 2026252 AMAQI
1st Aug 2026233 AMAQI
15°C14/18°C
1st Aug 2026214 AMAQI
1st Aug 2026195 AMAQI
1st Aug 2026236 AMAQI
1st Aug 2026237 AMAQI
1st Aug 2026238 AMAQI
1st Aug 2026219 AMAQI
1st Aug 20262510 AMAQI
1st Aug 20262511 AMAQI
1st Aug 20263112 PMAQI
1st Aug 2026291 PMAQI
1st Aug 2026312 PMAQI
1st Aug 2026313 PMAQI
1st Aug 2026274 PMAQI
1st Aug 2026255 PMAQI
1st Aug 2026256 PMAQI
1st Aug 2026277 PMAQI
1st Aug 2026318 PMAQI
1st Aug 2026299 PMAQI
1st Aug 20262710 PMAQI
1st Aug 20262711 PMAQI
2nd Aug 20262912 AMAQI
2nd Aug 2026291 AMAQI
2nd Aug 2026252 AMAQI
2nd Aug 2026293 AMAQI
17°C16/20°C
2nd Aug 2026294 AMAQI
2nd Aug 2026295 AMAQI
2nd Aug 2026256 AMAQI
2nd Aug 2026217 AMAQI
2nd Aug 2026258 AMAQI
2nd Aug 2026279 AMAQI
2nd Aug 20262510 AMAQI
2nd Aug 20262711 AMAQI
2nd Aug 20262712 PMAQI
2nd Aug 2026211 PMAQI
2nd Aug 2026252 PMAQI
2nd Aug 2026233 PMAQI
2nd Aug 2026274 PMAQI
2nd Aug 2026295 PMAQI
2nd Aug 2026346 PMAQI
2nd Aug 2026237 PMAQI
2nd Aug 2026338 PMAQI
2nd Aug 2026319 PMAQI
2nd Aug 20262110 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20262112 AMAQI
3rd Aug 2026251 AMAQI
3rd Aug 2026252 AMAQI
3rd Aug 2026233 AMAQI
18°C13/24°C
3rd Aug 2026254 AMAQI
3rd Aug 2026255 AMAQI
3rd Aug 2026256 AMAQI
3rd Aug 2026277 AMAQI
3rd Aug 2026258 AMAQI
3rd Aug 2026219 AMAQI
3rd Aug 20262110 AMAQI
3rd Aug 20262111 AMAQI
3rd Aug 20262712 PMAQI
3rd Aug 2026251 PMAQI
3rd Aug 2026272 PMAQI
3rd Aug 2026333 PMAQI
3rd Aug 2026214 PMAQI
3rd Aug 2026235 PMAQI
3rd Aug 2026256 PMAQI
3rd Aug 2026277 PMAQI
3rd Aug 2026298 PMAQI
3rd Aug 2026299 PMAQI
3rd Aug 20262510 PMAQI
3rd Aug 20262711 PMAQI
4th Aug 20262912 AMAQI
4th Aug 2026271 AMAQI
4th Aug 2026252 AMAQI
4th Aug 2026293 AMAQI
19°C12/28°C
4th Aug 2026274 AMAQI
4th Aug 2026275 AMAQI
4th Aug 2026276 AMAQI
4th Aug 2026297 AMAQI
4th Aug 2026278 AMAQI
4th Aug 2026299 AMAQI
4th Aug 20262710 AMAQI
4th Aug 20262911 AMAQI
4th Aug 20262512 PMAQI
4th Aug 2026291 PMAQI
4th Aug 2026252 PMAQI
4th Aug 2026273 PMAQI
4th Aug 2026254 PMAQI
4th Aug 2026235 PMAQI
4th Aug 2026256 PMAQI
4th Aug 2026277 PMAQI
4th Aug 2026258 PMAQI
4th Aug 2026279 PMAQI
4th Aug 20262710 PMAQI
4th Aug 20262511 PMAQI
5th Aug 20262512 AMAQI
5th Aug 2026271 AMAQI
5th Aug 2026252 AMAQI
5th Aug 2026253 AMAQI
20°C12/27°C
5th Aug 2026254 AMAQI
5th Aug 2026235 AMAQI
5th Aug 2026236 AMAQI
5th Aug 2026257 AMAQI
5th Aug 2026218 AMAQI
5th Aug 2026219 AMAQI
5th Aug 20262110 AMAQI
5th Aug 20262111 AMAQI
5th Aug 20262112 PMAQI
5th Aug 2026211 PMAQI
5th Aug 2026212 PMAQI
5th Aug 2026233 PMAQI
5th Aug 2026214 PMAQI
5th Aug 2026215 PMAQI
5th Aug 2026216 PMAQI
5th Aug 2026237 PMAQI
5th Aug 2026218 PMAQI
5th Aug 2026239 PMAQI
5th Aug 20262510 PMAQI
5th Aug 20262111 PMAQI
6th Aug 20262312 AMAQI
6th Aug 2026211 AMAQI
6th Aug 2026232 AMAQI
6th Aug 2026213 AMAQI
21°C14/29°C
6th Aug 2026254 AMAQI
6th Aug 2026235 AMAQI
6th Aug 2026236 AMAQI
6th Aug 2026257 AMAQI
6th Aug 2026238 AMAQI
6th Aug 2026259 AMAQI
6th Aug 20262910 AMAQI
6th Aug 20262511 AMAQI
6th Aug 20262912 PMAQI
6th Aug 2026251 PMAQI
6th Aug 2026252 PMAQI
6th Aug 2026273 PMAQI
6th Aug 2026234 PMAQI
6th Aug 2026215 PMAQI
6th Aug 2026256 PMAQI
6th Aug 2026257 PMAQI
6th Aug 2026258 PMAQI
6th Aug 2026259 PMAQI
6th Aug 20262510 PMAQI
6th Aug 20262511 PMAQI
7th Aug 20262112 AMAQI
7th Aug 2026251 AMAQI
7th Aug 2026232 AMAQI
7th Aug 2026233 AMAQI
22°C15/31°C
7th Aug 2026234 AMAQI
7th Aug 2026255 AMAQI
7th Aug 2026236 AMAQI
7th Aug 2026237 AMAQI
7th Aug 2026238 AMAQI
7th Aug 2026219 AMAQI
7th Aug 20262110 AMAQI
7th Aug 20262511 AMAQI
7th Aug 20262512 PMAQI
7th Aug 2026441 PMAQI
7th Aug 2026272 PMAQI
7th Aug 2026273 PMAQI
7th Aug 2026254 PMAQI
7th Aug 2026315 PMAQI
7th Aug 2026316 PMAQI
7th Aug 2026337 PMAQI
7th Aug 2026368 PMAQI
7th Aug 2026369 PMAQI
7th Aug 20263610 PMAQI
7th Aug 20263611 PMAQI
8th Aug 20264012 AMAQI
8th Aug 2026381 AMAQI
8th Aug 2026362 AMAQI
8th Aug 2026403 AMAQI
25°C17/33°C
8th Aug 2026424 AMAQI
8th Aug 2026405 AMAQI
8th Aug 2026426 AMAQI
8th Aug 2026407 AMAQI
8th Aug 2026388 AMAQI
8th Aug 2026369 AMAQI
8th Aug 20263610 AMAQI
8th Aug 20263111 AMAQI
8th Aug 20263112 PMAQI
8th Aug 2026291 PMAQI
8th Aug 2026292 PMAQI
8th Aug 2026273 PMAQI
8th Aug 2026254 PMAQI
8th Aug 2026235 PMAQI
8th Aug 2026216 PMAQI
8th Aug 2026217 PMAQI
8th Aug 2026218 PMAQI
8th Aug 2026219 PMAQI
8th Aug 20262110 PMAQI
8th Aug 20262311 PMAQI
9th Aug 20262312 AMAQI
9th Aug 2026231 AMAQI
9th Aug 2026272 AMAQI
9th Aug 2026273 AMAQI
20°C16/24°C
9th Aug 2026234 AMAQI
9th Aug 2026255 AMAQI
9th Aug 2026296 AMAQI
9th Aug 2026297 AMAQI
9th Aug 2026278 AMAQI
9th Aug 2026259 AMAQI
9th Aug 20262510 AMAQI
9th Aug 20262311 AMAQI
9th Aug 20262512 PMAQI
9th Aug 2026251 PMAQI
9th Aug 2026252 PMAQI
9th Aug 2026213 PMAQI
9th Aug 2026254 PMAQI
9th Aug 2026235 PMAQI
9th Aug 2026216 PMAQI
9th Aug 2026237 PMAQI
9th Aug 2026198 PMAQI
9th Aug 2026199 PMAQI
9th Aug 20262710 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20262512 AMAQI
10th Aug 2026251 AMAQI
10th Aug 2026252 AMAQI
10th Aug 2026253 AMAQI
16°C15/17°C
10th Aug 2026254 AMAQI
10th Aug 2026235 AMAQI
10th Aug 2026256 AMAQI
10th Aug 2026257 AMAQI
10th Aug 2026258 AMAQI
10th Aug 2026239 AMAQI
10th Aug 20261910 AMAQI
10th Aug 20261911 AMAQI
10th Aug 20262112 PMAQI
10th Aug 2026231 PMAQI
10th Aug 2026252 PMAQI
10th Aug 2026233 PMAQI
10th Aug 2026274 PMAQI
10th Aug 2026295 PMAQI
10th Aug 2026276 PMAQI
10th Aug 2026237 PMAQI
10th Aug 2026258 PMAQI
10th Aug 2026259 PMAQI
10th Aug 20262510 PMAQI
10th Aug 20262711 PMAQI
11th Aug 20262712 AMAQI
11th Aug 2026251 AMAQI
11th Aug 2026232 AMAQI
11th Aug 2026253 AMAQI
16°C15/18°C
11th Aug 2026254 AMAQI
11th Aug 2026235 AMAQI
11th Aug 2026256 AMAQI
11th Aug 2026257 AMAQI
11th Aug 2026258 AMAQI
11th Aug 2026259 AMAQI
11th Aug 20262710 AMAQI
11th Aug 20262711 AMAQI
11th Aug 20262512 PMAQI
11th Aug 2026251 PMAQI
11th Aug 2026252 PMAQI
11th Aug 2026253 PMAQI
11th Aug 2026274 PMAQI
11th Aug 2026255 PMAQI
11th Aug 2026276 PMAQI
11th Aug 2026257 PMAQI
11th Aug 2026238 PMAQI
11th Aug 2026259 PMAQI
11th Aug 20262710 PMAQI
11th Aug 20262711 PMAQI
12th Aug 20262712 AMAQI
12th Aug 2026291 AMAQI
12th Aug 2026252 AMAQI
12th Aug 2026253 AMAQI
17°C14/20°C
12th Aug 2026294 AMAQI
12th Aug 2026235 AMAQI
12th Aug 2026276 AMAQI
12th Aug 2026237 AMAQI
12th Aug 2026258 AMAQI
12th Aug 2026319 AMAQI
12th Aug 20262710 AMAQI
12th Aug 20262911 AMAQI
12th Aug 20262912 PMAQI
12th Aug 2026311 PMAQI
12th Aug 2026362 PMAQI
12th Aug 2026343 PMAQI
12th Aug 2026314 PMAQI
12th Aug 2026275 PMAQI
12th Aug 2026296 PMAQI
12th Aug 2026337 PMAQI
12th Aug 2026278 PMAQI
12th Aug 2026299 PMAQI
12th Aug 20262710 PMAQI
12th Aug 20262911 PMAQI
13th Aug 20264012 AMAQI
13th Aug 2026361 AMAQI
13th Aug 2026292 AMAQI
13th Aug 2026273 AMAQI
22°C16/29°C
13th Aug 2026294 AMAQI
13th Aug 2026255 AMAQI
13th Aug 2026256 AMAQI
13th Aug 2026257 AMAQI
13th Aug 2026238 AMAQI
13th Aug 2026259 AMAQI
13th Aug 20262710 AMAQI
13th Aug 20262711 AMAQI
13th Aug 20262512 PMAQI
13th Aug 2026251 PMAQI
13th Aug 2026252 PMAQI
13th Aug 2026273 PMAQI
13th Aug 2026274 PMAQI
13th Aug 2026315 PMAQI
13th Aug 2026316 PMAQI
13th Aug 2026277 PMAQI
13th Aug 2026258 PMAQI
13th Aug 2026239 PMAQI
13th Aug 20262510 PMAQI
13th Aug 20262711 PMAQI
14th Aug 20262312 AMAQI
14th Aug 2026251 AMAQI
14th Aug 2026252 AMAQI
14th Aug 2026253 AMAQI
22°C16/29°C
14th Aug 2026254 AMAQI
4 AM14th Aug 2026255 AMAQI
14th Aug 2026236 AMAQI
14th Aug 2026237 AMAQI
14th Aug 2026238 AMAQI
14th Aug 2026239 AMAQI
14th Aug 20262510 AMAQI
14th Aug 20263211 AMAQI
11 AM14th Aug 20263812 PMAQI
14th Aug 2026341 PMAQI
14th Aug 2026362 PMAQI
14th Aug 2026343 PMAQI
14th Aug 2026274 PMAQI
14th Aug 2026255 PMAQI
14th Aug 2026256 PMAQI
6 PM14th Aug 2026277 PMAQI
14th Aug 2026278 PMAQI
14th Aug 2026279 PMAQI
14th Aug 20262710 PMAQI
14th Aug 20262311 PMAQI
11 PM3 AM
23°C18/29°C
Day time
Avg. Highest Time
2 PM
28AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
8 AM - 9 AM
25AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 2 PM (Avg. 28), while the lowest AQI was between 8 AM to 9 AM (Avg. 25).
Night time
Avg. Highest Time
7 PM
29AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
1 AM - 3 AM
26AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 7 PM (Avg. 29), while the lowest AQI was between 1 AM to 3 AM (Avg. 26).
2026 Days Vs Air Quality
Koencho, Hokkaido, Japan
2026
84%
189
16%
37
Total number of days with different AQI categories in last 226 days in 2026 (139 days remaining)
Good
189 DaysModerate
37 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2026, 84% of 226 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
Koencho, Hokkaido, 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
24AQI (US)
24AQI (US)
2nd January 2026
24AQI (US)
24AQI (US)
3rd January 2026
17AQI (US)
17AQI (US)
4th January 2026
20AQI (US)
20AQI (US)
5th January 2026
26AQI (US)
26AQI (US)
6th January 2026
25AQI (US)
25AQI (US)
7th January 2026
33AQI (US)
33AQI (US)
8th January 2026
27AQI (US)
27AQI (US)
9th January 2026
27AQI (US)
27AQI (US)
10th January 2026
29AQI (US)
29AQI (US)
11th January 2026
27AQI (US)
27AQI (US)
12th January 2026
13AQI (US)
13AQI (US)
13th January 2026
22AQI (US)
22AQI (US)
14th January 2026
30AQI (US)
30AQI (US)
15th January 2026
26AQI (US)
26AQI (US)
16th January 2026
44AQI (US)
44AQI (US)
17th January 2026
25AQI (US)
25AQI (US)
18th January 2026
20AQI (US)
20AQI (US)
19th January 2026
30AQI (US)
30AQI (US)
20th January 2026
24AQI (US)
24AQI (US)
21st January 2026
16AQI (US)
16AQI (US)
22nd January 2026
20AQI (US)
20AQI (US)
23rd January 2026
36AQI (US)
36AQI (US)
24th January 2026
39AQI (US)
39AQI (US)
25th January 2026
24AQI (US)
24AQI (US)
26th January 2026
44AQI (US)
44AQI (US)
27th January 2026
44AQI (US)
44AQI (US)
28th January 2026
19AQI (US)
19AQI (US)
29th January 2026
21AQI (US)
21AQI (US)
30th January 2026
49AQI (US)
49AQI (US)
31st January 2026
16AQI (US)
16AQI (US)
1st February 2026
15AQI (US)
15AQI (US)
2nd February 2026
36AQI (US)
36AQI (US)
3rd February 2026
33AQI (US)
33AQI (US)
4th February 2026
32AQI (US)
32AQI (US)
5th February 2026
31AQI (US)
31AQI (US)
6th February 2026
37AQI (US)
37AQI (US)
7th February 2026
12AQI (US)
12AQI (US)
8th February 2026
19AQI (US)
19AQI (US)
9th February 2026
44AQI (US)
44AQI (US)
10th February 2026
52AQI (US)
52AQI (US)
11th February 2026
70AQI (US)
70AQI (US)
12th February 2026
23AQI (US)
23AQI (US)
13th February 2026
24AQI (US)
24AQI (US)
14th February 2026
65AQI (US)
65AQI (US)
15th February 2026
43AQI (US)
43AQI (US)
16th February 2026
18AQI (US)
18AQI (US)
17th February 2026
21AQI (US)
21AQI (US)
18th February 2026
24AQI (US)
24AQI (US)
19th February 2026
33AQI (US)
33AQI (US)
20th February 2026
30AQI (US)
30AQI (US)
21st February 2026
55AQI (US)
55AQI (US)
22nd February 2026
46AQI (US)
46AQI (US)
23rd February 2026
20AQI (US)
20AQI (US)
24th February 2026
26AQI (US)
26AQI (US)
25th February 2026
40AQI (US)
40AQI (US)
26th February 2026
52AQI (US)
52AQI (US)
27th February 2026
46AQI (US)
46AQI (US)
28th February 2026
48AQI (US)
48AQI (US)
1st March 2026
46AQI (US)
46AQI (US)
2nd March 2026
72AQI (US)
72AQI (US)
3rd March 2026
54AQI (US)
54AQI (US)
4th March 2026
69AQI (US)
69AQI (US)
5th March 2026
68AQI (US)
68AQI (US)
6th March 2026
55AQI (US)
55AQI (US)
7th March 2026
52AQI (US)
52AQI (US)
8th March 2026
59AQI (US)
59AQI (US)
9th March 2026
56AQI (US)
56AQI (US)
10th March 2026
57AQI (US)
57AQI (US)
11th March 2026
56AQI (US)
56AQI (US)
12th March 2026
72AQI (US)
72AQI (US)
13th March 2026
48AQI (US)
48AQI (US)
14th March 2026
50AQI (US)
50AQI (US)
15th March 2026
65AQI (US)
65AQI (US)
16th March 2026
48AQI (US)
48AQI (US)
17th March 2026
48AQI (US)
48AQI (US)
18th March 2026
43AQI (US)
43AQI (US)
19th March 2026
53AQI (US)
53AQI (US)
20th March 2026
40AQI (US)
40AQI (US)
21st March 2026
35AQI (US)
35AQI (US)
22nd March 2026
54AQI (US)
54AQI (US)
23rd March 2026
63AQI (US)
63AQI (US)
24th March 2026
34AQI (US)
34AQI (US)
25th March 2026
35AQI (US)
35AQI (US)
26th March 2026
31AQI (US)
31AQI (US)
27th March 2026
37AQI (US)
37AQI (US)
28th March 2026
49AQI (US)
49AQI (US)
29th March 2026
61AQI (US)
61AQI (US)
30th March 2026
67AQI (US)
67AQI (US)
31st March 2026
57AQI (US)
57AQI (US)
1st April 2026
27AQI (US)
27AQI (US)
2nd April 2026
30AQI (US)
30AQI (US)
3rd April 2026
56AQI (US)
56AQI (US)
4th April 2026
55AQI (US)
55AQI (US)
5th April 2026
24AQI (US)
24AQI (US)
6th April 2026
22AQI (US)
22AQI (US)
7th April 2026
30AQI (US)
30AQI (US)
8th April 2026
25AQI (US)
25AQI (US)
9th April 2026
47AQI (US)
47AQI (US)
10th April 2026
56AQI (US)
56AQI (US)
11th April 2026
36AQI (US)
36AQI (US)
12th April 2026
33AQI (US)
33AQI (US)
13th April 2026
30AQI (US)
30AQI (US)
14th April 2026
42AQI (US)
42AQI (US)
15th April 2026
44AQI (US)
44AQI (US)
16th April 2026
32AQI (US)
32AQI (US)
17th April 2026
42AQI (US)
42AQI (US)
18th April 2026
39AQI (US)
39AQI (US)
19th April 2026
39AQI (US)
39AQI (US)
20th April 2026
32AQI (US)
32AQI (US)
21st April 2026
43AQI (US)
43AQI (US)
22nd April 2026
43AQI (US)
43AQI (US)
23rd April 2026
16AQI (US)
16AQI (US)
24th April 2026
23AQI (US)
23AQI (US)
25th April 2026
53AQI (US)
53AQI (US)
26th April 2026
47AQI (US)
47AQI (US)
27th April 2026
34AQI (US)
34AQI (US)
28th April 2026
25AQI (US)
25AQI (US)
29th April 2026
28AQI (US)
28AQI (US)
30th April 2026
39AQI (US)
39AQI (US)
1st May 2026
41AQI (US)
41AQI (US)
2nd May 2026
41AQI (US)
41AQI (US)
3rd May 2026
40AQI (US)
40AQI (US)
4th May 2026
34AQI (US)
34AQI (US)
5th May 2026
25AQI (US)
25AQI (US)
6th May 2026
36AQI (US)
36AQI (US)
7th May 2026
33AQI (US)
33AQI (US)
8th May 2026
23AQI (US)
23AQI (US)
9th May 2026
27AQI (US)
27AQI (US)
10th May 2026
34AQI (US)
34AQI (US)
11th May 2026
34AQI (US)
34AQI (US)
12th May 2026
44AQI (US)
44AQI (US)
13th May 2026
43AQI (US)
43AQI (US)
14th May 2026
35AQI (US)
35AQI (US)
15th May 2026
35AQI (US)
35AQI (US)
16th May 2026
80AQI (US)
80AQI (US)
17th May 2026
67AQI (US)
67AQI (US)
18th May 2026
57AQI (US)
57AQI (US)
19th May 2026
54AQI (US)
54AQI (US)
20th May 2026
64AQI (US)
64AQI (US)
21st May 2026
65AQI (US)
65AQI (US)
22nd May 2026
76AQI (US)
76AQI (US)
23rd May 2026
70AQI (US)
70AQI (US)
24th May 2026
69AQI (US)
69AQI (US)
25th May 2026
65AQI (US)
65AQI (US)
26th May 2026
45AQI (US)
45AQI (US)
27th May 2026
23AQI (US)
23AQI (US)
28th May 2026
28AQI (US)
28AQI (US)
29th May 2026
24AQI (US)
24AQI (US)
30th May 2026
22AQI (US)
22AQI (US)
31st May 2026
26AQI (US)
26AQI (US)
1st June 2026
25AQI (US)
25AQI (US)
2nd June 2026
46AQI (US)
46AQI (US)
3rd June 2026
48AQI (US)
48AQI (US)
4th June 2026
29AQI (US)
29AQI (US)
5th June 2026
18AQI (US)
18AQI (US)
6th June 2026
21AQI (US)
21AQI (US)
7th June 2026
20AQI (US)
20AQI (US)
8th June 2026
20AQI (US)
20AQI (US)
9th June 2026
19AQI (US)
19AQI (US)
10th June 2026
22AQI (US)
22AQI (US)
11th June 2026
24AQI (US)
24AQI (US)
12th June 2026
24AQI (US)
24AQI (US)
13th June 2026
25AQI (US)
25AQI (US)
14th June 2026
23AQI (US)
23AQI (US)
15th June 2026
22AQI (US)
22AQI (US)
16th June 2026
26AQI (US)
26AQI (US)
17th June 2026
25AQI (US)
25AQI (US)
18th June 2026
25AQI (US)
25AQI (US)
19th June 2026
29AQI (US)
29AQI (US)
20th June 2026
22AQI (US)
22AQI (US)
21st June 2026
20AQI (US)
20AQI (US)
22nd June 2026
19AQI (US)
19AQI (US)
23rd June 2026
22AQI (US)
22AQI (US)
24th June 2026
20AQI (US)
20AQI (US)
25th June 2026
27AQI (US)
27AQI (US)
26th June 2026
28AQI (US)
28AQI (US)
27th June 2026
27AQI (US)
27AQI (US)
28th June 2026
27AQI (US)
27AQI (US)
29th June 2026
26AQI (US)
26AQI (US)
30th June 2026
23AQI (US)
23AQI (US)
1st July 2026
23AQI (US)
23AQI (US)
2nd July 2026
22AQI (US)
22AQI (US)
3rd July 2026
24AQI (US)
24AQI (US)
4th July 2026
24AQI (US)
24AQI (US)
5th July 2026
22AQI (US)
22AQI (US)
6th July 2026
26AQI (US)
26AQI (US)
7th July 2026
21AQI (US)
21AQI (US)
8th July 2026
24AQI (US)
24AQI (US)
9th July 2026
25AQI (US)
25AQI (US)
10th July 2026
24AQI (US)
24AQI (US)
11th July 2026
28AQI (US)
28AQI (US)
12th July 2026
26AQI (US)
26AQI (US)
13th July 2026
25AQI (US)
25AQI (US)
14th July 2026
27AQI (US)
27AQI (US)
15th July 2026
25AQI (US)
25AQI (US)
16th July 2026
24AQI (US)
24AQI (US)
17th July 2026
25AQI (US)
25AQI (US)
18th July 2026
28AQI (US)
28AQI (US)
19th July 2026
28AQI (US)
28AQI (US)
20th July 2026
25AQI (US)
25AQI (US)
21st July 2026
28AQI (US)
28AQI (US)
22nd July 2026
25AQI (US)
25AQI (US)
23rd July 2026
26AQI (US)
26AQI (US)
24th July 2026
28AQI (US)
28AQI (US)
25th July 2026
26AQI (US)
26AQI (US)
26th July 2026
25AQI (US)
25AQI (US)
27th July 2026
26AQI (US)
26AQI (US)
28th July 2026
26AQI (US)
26AQI (US)
29th July 2026
28AQI (US)
28AQI (US)
30th July 2026
25AQI (US)
25AQI (US)
31st July 2026
31AQI (US)
31AQI (US)
1st August 2026
26AQI (US)
26AQI (US)
2nd August 2026
27AQI (US)
27AQI (US)
3rd August 2026
25AQI (US)
25AQI (US)
4th August 2026
27AQI (US)
27AQI (US)
5th August 2026
23AQI (US)
23AQI (US)
6th August 2026
24AQI (US)
24AQI (US)
7th August 2026
28AQI (US)
28AQI (US)
8th August 2026
31AQI (US)
31AQI (US)
9th August 2026
24AQI (US)
24AQI (US)
10th August 2026
24AQI (US)
24AQI (US)
11th August 2026
25AQI (US)
25AQI (US)
12th August 2026
28AQI (US)
28AQI (US)
13th August 2026
27AQI (US)
27AQI (US)
14th August 2026
27AQI (US)
27AQI (US)
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
27AQI (US)
36AQI (US)
53AQI (US)
36AQI (US)
44AQI (US)
25AQI (US)
25AQI (US)
26AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202635AQI (US)
31
23
5
13
18
26
4
21
10
30
31
14
189
37
Highest AQI (US) recorded in
March53AQI (US)
Lowest AQI (US) recorded in
July25AQI (US)
202536AQI (US)
28
3
26
2
30
1
30
31
30
31
31
30
27
4
22
8
27
4
343
22
Highest AQI (US) recorded in
January41AQI (US)
Lowest AQI (US) recorded in
September30AQI (US)
202331AQI (US)
23
8
24
4
24
7
23
7
29
2
29
1
29
2
31
30
31
27
31
331
31
Highest AQI (US) recorded in
February41AQI (US)
Lowest AQI (US) recorded in
September21AQI (US)
202227AQI (US)
28
1
20
2
31
25
5
28
3
30
24
1
28
31
29
1
30
1
305
13
Highest AQI (US) recorded in
November34AQI (US)
Lowest AQI (US) recorded in
August13AQI (US)
202129AQI (US)
17
13
24
3
1
28
1
21
31
30
24
6
27
1
28
31
29
1
28
3
318
28
1
Highest AQI (US) recorded in
January43AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202025AQI (US)
13
21
18
28
2
31
31
9
1
20
28
3
199
6
Highest AQI (US) recorded in
December36AQI (US)
Lowest AQI (US) recorded in
November19AQI (US)
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
36AQI (US)Least Polluted Year Recorded
2020(Avg.)
25AQI (US)Koencho's annual 2026 AQI (US) (35) shows an average percentage change of 20.08% (worsened AQI (US)) compared to previous years: 2020 (25), 2021 (29), 2022 (27), 2023 (31), 2025 (36).
