Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Cheongju, Chungbuk, South Korea 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

Cheongju, Chungbuk, South Korea

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Aug 2023
79AQI
Lowest AQI recorded on
2nd Aug 2022
12AQI

Same Day Analysis (5th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 25 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 4th Aug - 5th Aug 2026

Cheongju, Chungbuk, South Korea

AQI
Day
Night
.

5 AM4th Aug 2026

7 PM

4 AM5th Aug 2026

Day time
Avg. Highest Time
5AM4th Aug

76AQI

Avg. Lowest Time
7PM4th Aug

44AQI

Night time
Avg. Highest Time
9PM4th Aug

51AQI

Avg. Lowest Time
4AM5th Aug

27AQI

In the last 24 hours,

Cheongju's AQI reached its highest point of 76 at 5 AM during the Day, while the lowest point, 27, was recorded at 4 AM during the Night between 4th Aug and 5th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Cheongju, Chungbuk, South Korea

JulAug
07th - 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
7th Jul 2026485 AMAQI
7th Jul 2026446 AMAQI
7th Jul 2026377 AMAQI
7th Jul 2026408 AMAQI
7th Jul 2026329 AMAQI
7th Jul 20262310 AMAQI
7th Jul 20262211 AMAQI
7th Jul 20262112 PMAQI
7th Jul 2026191 PMAQI
7th Jul 2026192 PMAQI
7th Jul 2026213 PMAQI
7th Jul 2026184 PMAQI
7th Jul 2026245 PMAQI
7th Jul 2026246 PMAQI
7th Jul 2026277 PMAQI
7th Jul 2026298 PMAQI
7th Jul 2026359 PMAQI
7th Jul 20263710 PMAQI
7th Jul 20263311 PMAQI
8th Jul 20264712 AMAQI
8th Jul 2026611 AMAQI
8th Jul 2026632 AMAQI
8th Jul 2026563 AMAQI
8th Jul 2026544 AMAQI

26°C22/33°C

8th Jul 2026475 AMAQI
8th Jul 2026376 AMAQI
8th Jul 2026307 AMAQI
8th Jul 2026358 AMAQI
8th Jul 2026339 AMAQI
8th Jul 20263410 AMAQI
8th Jul 20262911 AMAQI
8th Jul 20263012 PMAQI
8th Jul 2026311 PMAQI
8th Jul 2026232 PMAQI
8th Jul 2026213 PMAQI
8th Jul 2026174 PMAQI
8th Jul 2026145 PMAQI
8th Jul 2026136 PMAQI
8th Jul 2026107 PMAQI
8th Jul 2026108 PMAQI
8th Jul 2026119 PMAQI
8th Jul 20261110 PMAQI
8th Jul 20261111 PMAQI
9th Jul 20261212 AMAQI
9th Jul 2026121 AMAQI
9th Jul 2026142 AMAQI
9th Jul 2026143 AMAQI
9th Jul 2026164 AMAQI

24°C22/26°C

9th Jul 2026175 AMAQI
9th Jul 2026156 AMAQI
9th Jul 2026197 AMAQI
9th Jul 2026168 AMAQI
9th Jul 2026109 AMAQI
9th Jul 2026910 AMAQI
9th Jul 20261011 AMAQI
9th Jul 20261312 PMAQI
9th Jul 2026141 PMAQI
9th Jul 2026192 PMAQI
9th Jul 2026173 PMAQI
9th Jul 2026114 PMAQI
9th Jul 2026105 PMAQI
9th Jul 2026116 PMAQI
9th Jul 2026127 PMAQI
9th Jul 2026148 PMAQI
9th Jul 2026169 PMAQI
9th Jul 20261610 PMAQI
9th Jul 20261911 PMAQI
10th Jul 20261812 AMAQI
10th Jul 2026171 AMAQI
10th Jul 2026212 AMAQI
10th Jul 2026253 AMAQI
10th Jul 2026234 AMAQI

23°C22/26°C

10th Jul 2026255 AMAQI
10th Jul 2026246 AMAQI
10th Jul 2026247 AMAQI
10th Jul 2026268 AMAQI
10th Jul 2026279 AMAQI
10th Jul 20262710 AMAQI
10th Jul 20262711 AMAQI
10th Jul 20262812 PMAQI
10th Jul 2026271 PMAQI
10th Jul 2026382 PMAQI
10th Jul 2026393 PMAQI
10th Jul 2026354 PMAQI
10th Jul 2026385 PMAQI
10th Jul 2026366 PMAQI
10th Jul 2026367 PMAQI
10th Jul 2026388 PMAQI
10th Jul 2026389 PMAQI
10th Jul 20263210 PMAQI
10th Jul 20262711 PMAQI
11th Jul 20262812 AMAQI
11th Jul 2026301 AMAQI
11th Jul 2026302 AMAQI
11th Jul 2026333 AMAQI
11th Jul 2026324 AMAQI

24°C19/29°C

11th Jul 2026305 AMAQI
11th Jul 2026276 AMAQI
11th Jul 2026257 AMAQI
11th Jul 2026298 AMAQI
11th Jul 2026439 AMAQI
11th Jul 20262710 AMAQI
11th Jul 20263911 AMAQI
11th Jul 20263312 PMAQI
11th Jul 2026261 PMAQI
11th Jul 2026272 PMAQI
11th Jul 2026283 PMAQI
11th Jul 2026284 PMAQI
11th Jul 2026355 PMAQI
11th Jul 2026416 PMAQI
11th Jul 2026397 PMAQI
11th Jul 2026398 PMAQI
11th Jul 2026309 PMAQI
11th Jul 20263010 PMAQI
11th Jul 20263111 PMAQI
12th Jul 20263112 AMAQI
12th Jul 2026411 AMAQI
12th Jul 2026482 AMAQI
12th Jul 2026463 AMAQI
12th Jul 2026434 AMAQI

27°C21/34°C

12th Jul 2026455 AMAQI
12th Jul 2026456 AMAQI
12th Jul 2026417 AMAQI
12th Jul 2026348 AMAQI
12th Jul 2026299 AMAQI
12th Jul 20262910 AMAQI
12th Jul 20262711 AMAQI
12th Jul 20262612 PMAQI
12th Jul 2026251 PMAQI
12th Jul 2026252 PMAQI
12th Jul 2026223 PMAQI
12th Jul 2026274 PMAQI
12th Jul 2026315 PMAQI
12th Jul 2026296 PMAQI
12th Jul 2026307 PMAQI
12th Jul 2026318 PMAQI
12th Jul 2026339 PMAQI
12th Jul 20263110 PMAQI
12th Jul 20263111 PMAQI
13th Jul 20263012 AMAQI
13th Jul 2026301 AMAQI
13th Jul 2026312 AMAQI
13th Jul 2026323 AMAQI
13th Jul 2026294 AMAQI

28°C22/36°C

13th Jul 2026295 AMAQI
13th Jul 2026286 AMAQI
13th Jul 2026327 AMAQI
13th Jul 2026288 AMAQI
13th Jul 2026299 AMAQI
13th Jul 20262910 AMAQI
13th Jul 20262811 AMAQI
13th Jul 20262612 PMAQI
13th Jul 2026231 PMAQI
13th Jul 2026222 PMAQI
13th Jul 2026213 PMAQI
13th Jul 2026244 PMAQI
13th Jul 2026285 PMAQI
13th Jul 2026296 PMAQI
13th Jul 2026267 PMAQI
13th Jul 2026298 PMAQI
13th Jul 2026299 PMAQI
13th Jul 20262910 PMAQI
13th Jul 20263111 PMAQI
14th Jul 20263012 AMAQI
14th Jul 2026311 AMAQI
14th Jul 2026322 AMAQI
14th Jul 2026283 AMAQI
14th Jul 2026264 AMAQI

28°C23/34°C

14th Jul 2026305 AMAQI
14th Jul 2026296 AMAQI
14th Jul 2026297 AMAQI
14th Jul 2026298 AMAQI
14th Jul 2026299 AMAQI
14th Jul 20263010 AMAQI
14th Jul 20262411 AMAQI
14th Jul 20262112 PMAQI
14th Jul 2026181 PMAQI
14th Jul 2026192 PMAQI
14th Jul 2026183 PMAQI
14th Jul 2026174 PMAQI
14th Jul 2026245 PMAQI
14th Jul 2026266 PMAQI
14th Jul 2026277 PMAQI
14th Jul 2026278 PMAQI
14th Jul 2026289 PMAQI
14th Jul 20263010 PMAQI
14th Jul 20263111 PMAQI
15th Jul 20263112 AMAQI
15th Jul 2026311 AMAQI
15th Jul 2026302 AMAQI
15th Jul 2026293 AMAQI
15th Jul 2026244 AMAQI

28°C22/34°C

15th Jul 2026285 AMAQI
15th Jul 2026236 AMAQI
15th Jul 2026277 AMAQI
15th Jul 2026288 AMAQI
15th Jul 2026299 AMAQI
15th Jul 20262910 AMAQI
15th Jul 20262611 AMAQI
15th Jul 20262512 PMAQI
15th Jul 2026201 PMAQI
15th Jul 2026212 PMAQI
15th Jul 2026203 PMAQI
15th Jul 2026244 PMAQI
15th Jul 2026275 PMAQI
15th Jul 2026246 PMAQI
15th Jul 2026237 PMAQI
15th Jul 2026258 PMAQI
15th Jul 2026229 PMAQI
15th Jul 20262310 PMAQI
15th Jul 20262111 PMAQI
16th Jul 20262012 AMAQI
16th Jul 2026221 AMAQI
16th Jul 2026322 AMAQI
16th Jul 2026303 AMAQI
16th Jul 2026484 AMAQI

26°C23/31°C

16th Jul 2026475 AMAQI
16th Jul 2026466 AMAQI
16th Jul 2026477 AMAQI
16th Jul 2026498 AMAQI
16th Jul 2026529 AMAQI
16th Jul 20266010 AMAQI
16th Jul 20266311 AMAQI
16th Jul 20266412 PMAQI
16th Jul 2026681 PMAQI
16th Jul 2026702 PMAQI
16th Jul 2026723 PMAQI
16th Jul 2026714 PMAQI
16th Jul 2026805 PMAQI
16th Jul 2026806 PMAQI
16th Jul 2026787 PMAQI
16th Jul 2026758 PMAQI
16th Jul 2026719 PMAQI
16th Jul 20267310 PMAQI
16th Jul 20267011 PMAQI
17th Jul 20266612 AMAQI
17th Jul 2026621 AMAQI
17th Jul 2026612 AMAQI
17th Jul 2026633 AMAQI
17th Jul 2026674 AMAQI

25°C20/32°C

17th Jul 2026695 AMAQI
17th Jul 2026666 AMAQI
17th Jul 2026647 AMAQI
17th Jul 2026638 AMAQI
17th Jul 2026639 AMAQI
17th Jul 20266210 AMAQI
17th Jul 20266211 AMAQI
17th Jul 20266612 PMAQI
17th Jul 2026681 PMAQI
17th Jul 2026652 PMAQI
17th Jul 2026573 PMAQI
17th Jul 2026584 PMAQI
17th Jul 2026505 PMAQI
17th Jul 2026356 PMAQI
17th Jul 2026367 PMAQI
17th Jul 2026378 PMAQI
17th Jul 2026419 PMAQI
17th Jul 20264710 PMAQI
17th Jul 20265111 PMAQI
18th Jul 20265212 AMAQI
18th Jul 2026511 AMAQI
18th Jul 2026452 AMAQI
18th Jul 2026393 AMAQI
18th Jul 2026254 AMAQI

25°C22/29°C

18th Jul 2026205 AMAQI
18th Jul 2026166 AMAQI
18th Jul 2026177 AMAQI
18th Jul 2026188 AMAQI
18th Jul 2026269 AMAQI
18th Jul 20263810 AMAQI
18th Jul 20264511 AMAQI
18th Jul 20264812 PMAQI
18th Jul 2026501 PMAQI
18th Jul 2026482 PMAQI
18th Jul 2026453 PMAQI
18th Jul 2026474 PMAQI
18th Jul 2026525 PMAQI
18th Jul 2026486 PMAQI
18th Jul 2026497 PMAQI
18th Jul 2026418 PMAQI
18th Jul 2026449 PMAQI
18th Jul 20264710 PMAQI
18th Jul 20264311 PMAQI
19th Jul 20264412 AMAQI
19th Jul 2026461 AMAQI
19th Jul 2026402 AMAQI
19th Jul 2026343 AMAQI
19th Jul 2026314 AMAQI

25°C23/27°C

19th Jul 2026325 AMAQI
19th Jul 2026306 AMAQI
19th Jul 2026347 AMAQI
19th Jul 2026398 AMAQI
19th Jul 2026449 AMAQI
19th Jul 20264010 AMAQI
19th Jul 20263811 AMAQI
19th Jul 20263112 PMAQI
19th Jul 2026261 PMAQI
19th Jul 2026232 PMAQI
19th Jul 2026223 PMAQI
19th Jul 2026224 PMAQI
19th Jul 2026225 PMAQI
19th Jul 2026276 PMAQI
19th Jul 2026307 PMAQI
19th Jul 2026318 PMAQI
19th Jul 2026309 PMAQI
19th Jul 20263010 PMAQI
19th Jul 20262811 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026291 AMAQI
20th Jul 2026292 AMAQI
20th Jul 2026383 AMAQI
20th Jul 2026414 AMAQI

25°C24/27°C

20th Jul 2026385 AMAQI
20th Jul 2026356 AMAQI
20th Jul 2026417 AMAQI
20th Jul 2026428 AMAQI
20th Jul 2026399 AMAQI
20th Jul 20264010 AMAQI
20th Jul 20263111 AMAQI
20th Jul 20262612 PMAQI
20th Jul 2026251 PMAQI
20th Jul 2026242 PMAQI
20th Jul 2026273 PMAQI
20th Jul 2026304 PMAQI
20th Jul 2026315 PMAQI
20th Jul 2026346 PMAQI
20th Jul 2026377 PMAQI
20th Jul 2026348 PMAQI
20th Jul 2026319 PMAQI
20th Jul 20262810 PMAQI
20th Jul 20263011 PMAQI
21st Jul 20263412 AMAQI
21st Jul 2026291 AMAQI
21st Jul 2026292 AMAQI
21st Jul 2026263 AMAQI
21st Jul 2026254 AMAQI

25°C20/30°C

21st Jul 2026285 AMAQI
21st Jul 2026246 AMAQI
21st Jul 2026247 AMAQI
21st Jul 2026248 AMAQI
21st Jul 2026249 AMAQI
21st Jul 20262410 AMAQI
21st Jul 20262411 AMAQI
21st Jul 2026291 PMAQI
21st Jul 2026262 PMAQI
21st Jul 2026313 PMAQI
21st Jul 2026354 PMAQI
21st Jul 2026405 PMAQI
21st Jul 2026446 PMAQI
21st Jul 2026807 PMAQI
21st Jul 2026368 PMAQI
21st Jul 2026359 PMAQI
21st Jul 20263410 PMAQI
21st Jul 20263711 PMAQI
22nd Jul 20263512 AMAQI
22nd Jul 2026331 AMAQI
22nd Jul 2026342 AMAQI
22nd Jul 2026453 AMAQI
22nd Jul 2026434 AMAQI

25°C22/29°C

22nd Jul 2026455 AMAQI
22nd Jul 2026426 AMAQI
22nd Jul 2026397 AMAQI
22nd Jul 2026418 AMAQI
22nd Jul 2026369 AMAQI
22nd Jul 20263110 AMAQI
22nd Jul 20263111 AMAQI
22nd Jul 20264512 PMAQI
22nd Jul 2026501 PMAQI
22nd Jul 2026462 PMAQI
22nd Jul 2026443 PMAQI
22nd Jul 2026464 PMAQI
22nd Jul 2026425 PMAQI
22nd Jul 2026436 PMAQI
22nd Jul 2026387 PMAQI
22nd Jul 2026388 PMAQI
22nd Jul 2026329 PMAQI
22nd Jul 20262910 PMAQI
22nd Jul 20262611 PMAQI
23rd Jul 20262312 AMAQI
23rd Jul 2026231 AMAQI
23rd Jul 2026262 AMAQI
23rd Jul 2026293 AMAQI
23rd Jul 2026294 AMAQI

27°C23/31°C

23rd Jul 2026325 AMAQI
23rd Jul 2026316 AMAQI
23rd Jul 2026287 AMAQI
23rd Jul 2026258 AMAQI
23rd Jul 2026279 AMAQI
23rd Jul 20263310 AMAQI
23rd Jul 20263811 AMAQI
23rd Jul 20263212 PMAQI
23rd Jul 2026321 PMAQI
23rd Jul 2026362 PMAQI
23rd Jul 2026483 PMAQI
23rd Jul 2026484 PMAQI
23rd Jul 2026445 PMAQI
23rd Jul 2026456 PMAQI
23rd Jul 2026437 PMAQI
23rd Jul 2026438 PMAQI
23rd Jul 2026489 PMAQI
23rd Jul 20264910 PMAQI
23rd Jul 20264411 PMAQI
24th Jul 20263812 AMAQI
24th Jul 2026341 AMAQI
24th Jul 2026342 AMAQI
24th Jul 2026433 AMAQI
24th Jul 2026504 AMAQI

26°C22/31°C

24th Jul 2026485 AMAQI
24th Jul 2026436 AMAQI
24th Jul 2026427 AMAQI
24th Jul 2026418 AMAQI
24th Jul 2026469 AMAQI
24th Jul 20264910 AMAQI
24th Jul 20264811 AMAQI
24th Jul 20264512 PMAQI
24th Jul 2026391 PMAQI
24th Jul 2026382 PMAQI
24th Jul 2026353 PMAQI
24th Jul 2026424 PMAQI
24th Jul 2026385 PMAQI
24th Jul 2026306 PMAQI
24th Jul 2026277 PMAQI
24th Jul 2026288 PMAQI
24th Jul 2026269 PMAQI
24th Jul 20263210 PMAQI
24th Jul 20263111 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026321 AMAQI
25th Jul 2026282 AMAQI
25th Jul 2026293 AMAQI
25th Jul 2026294 AMAQI

27°C22/33°C

25th Jul 2026275 AMAQI
25th Jul 2026286 AMAQI
25th Jul 2026257 AMAQI
25th Jul 2026248 AMAQI
25th Jul 2026309 AMAQI
25th Jul 20263210 AMAQI
25th Jul 20263111 AMAQI
25th Jul 20262912 PMAQI
25th Jul 2026411 PMAQI
25th Jul 2026402 PMAQI
25th Jul 2026293 PMAQI
25th Jul 2026264 PMAQI
25th Jul 2026235 PMAQI
25th Jul 2026236 PMAQI
25th Jul 2026237 PMAQI
25th Jul 2026228 PMAQI
25th Jul 2026249 PMAQI
25th Jul 20262410 PMAQI
25th Jul 20262311 PMAQI
26th Jul 20262412 AMAQI
26th Jul 2026301 AMAQI
26th Jul 2026292 AMAQI
26th Jul 2026273 AMAQI
26th Jul 2026234 AMAQI

27°C23/31°C

26th Jul 2026245 AMAQI
26th Jul 2026296 AMAQI
26th Jul 2026317 AMAQI
26th Jul 2026328 AMAQI
26th Jul 2026339 AMAQI
26th Jul 20263410 AMAQI
26th Jul 20263311 AMAQI
26th Jul 20262712 PMAQI
26th Jul 2026261 PMAQI
26th Jul 2026302 PMAQI
26th Jul 2026283 PMAQI
26th Jul 2026284 PMAQI
26th Jul 2026245 PMAQI
26th Jul 2026226 PMAQI
26th Jul 2026237 PMAQI
26th Jul 2026248 PMAQI
26th Jul 2026239 PMAQI
26th Jul 20262410 PMAQI
26th Jul 20262411 PMAQI
27th Jul 20262512 AMAQI
27th Jul 2026241 AMAQI
27th Jul 2026252 AMAQI
27th Jul 2026233 AMAQI
27th Jul 2026244 AMAQI

27°C23/33°C

27th Jul 2026285 AMAQI
27th Jul 2026256 AMAQI
27th Jul 2026247 AMAQI
27th Jul 2026248 AMAQI
27th Jul 2026249 AMAQI
27th Jul 20262610 AMAQI
27th Jul 20263511 AMAQI
27th Jul 20264712 PMAQI
27th Jul 2026491 PMAQI
27th Jul 2026442 PMAQI
27th Jul 2026443 PMAQI
27th Jul 2026434 PMAQI
27th Jul 2026285 PMAQI
27th Jul 2026236 PMAQI
27th Jul 2026257 PMAQI
27th Jul 2026248 PMAQI
27th Jul 2026259 PMAQI
27th Jul 20262610 PMAQI
27th Jul 20262711 PMAQI
28th Jul 20262512 AMAQI
28th Jul 2026281 AMAQI
28th Jul 2026292 AMAQI
28th Jul 2026363 AMAQI
28th Jul 2026274 AMAQI

27°C24/33°C

28th Jul 2026285 AMAQI
28th Jul 2026336 AMAQI
28th Jul 2026357 AMAQI
28th Jul 2026338 AMAQI
28th Jul 2026279 AMAQI
28th Jul 20264010 AMAQI
28th Jul 20264711 AMAQI
28th Jul 20265112 PMAQI
28th Jul 2026561 PMAQI
28th Jul 2026572 PMAQI
28th Jul 2026553 PMAQI
28th Jul 2026564 PMAQI
28th Jul 2026605 PMAQI
28th Jul 2026576 PMAQI
28th Jul 2026567 PMAQI
28th Jul 2026578 PMAQI
28th Jul 2026589 PMAQI
28th Jul 20265210 PMAQI
28th Jul 20265111 PMAQI
29th Jul 20264712 AMAQI
29th Jul 2026441 AMAQI
29th Jul 2026392 AMAQI
29th Jul 2026363 AMAQI
29th Jul 2026364 AMAQI

27°C23/32°C

29th Jul 2026375 AMAQI
29th Jul 2026386 AMAQI
29th Jul 2026337 AMAQI
29th Jul 2026328 AMAQI
29th Jul 2026309 AMAQI
29th Jul 20262610 AMAQI
29th Jul 20262511 AMAQI
29th Jul 20263012 PMAQI
29th Jul 2026331 PMAQI
29th Jul 2026332 PMAQI
29th Jul 2026343 PMAQI
29th Jul 2026354 PMAQI
29th Jul 2026315 PMAQI
29th Jul 2026286 PMAQI
29th Jul 2026247 PMAQI
29th Jul 2026228 PMAQI
29th Jul 2026249 PMAQI
29th Jul 20262410 PMAQI
29th Jul 20262211 PMAQI
30th Jul 20262412 AMAQI
30th Jul 2026231 AMAQI
30th Jul 2026242 AMAQI
30th Jul 2026243 AMAQI
30th Jul 2026244 AMAQI

26°C22/32°C

30th Jul 2026235 AMAQI
30th Jul 2026236 AMAQI
30th Jul 2026237 AMAQI
30th Jul 2026238 AMAQI
30th Jul 2026239 AMAQI
30th Jul 20262210 AMAQI
30th Jul 20262311 AMAQI
30th Jul 20262512 PMAQI
30th Jul 2026251 PMAQI
30th Jul 2026252 PMAQI
30th Jul 2026293 PMAQI
30th Jul 2026284 PMAQI
30th Jul 2026285 PMAQI
30th Jul 2026276 PMAQI
30th Jul 2026297 PMAQI
30th Jul 2026298 PMAQI
30th Jul 2026309 PMAQI
30th Jul 20262310 PMAQI
30th Jul 20262311 PMAQI
31st Jul 20262512 AMAQI
31st Jul 2026251 AMAQI
31st Jul 2026262 AMAQI
31st Jul 2026283 AMAQI
31st Jul 2026254 AMAQI

26°C22/32°C

31st Jul 2026245 AMAQI
31st Jul 2026276 AMAQI
31st Jul 2026287 AMAQI
31st Jul 2026278 AMAQI
31st Jul 2026299 AMAQI
31st Jul 20263710 AMAQI
31st Jul 20264211 AMAQI
31st Jul 20264912 PMAQI
31st Jul 2026491 PMAQI
31st Jul 2026372 PMAQI
31st Jul 2026413 PMAQI
31st Jul 2026384 PMAQI
31st Jul 2026335 PMAQI
31st Jul 2026366 PMAQI
31st Jul 2026507 PMAQI
31st Jul 2026498 PMAQI
31st Jul 2026489 PMAQI
31st Jul 20264810 PMAQI
31st Jul 20264711 PMAQI
1st Aug 20265512 AMAQI
1st Aug 2026501 AMAQI
1st Aug 2026532 AMAQI
1st Aug 2026543 AMAQI
1st Aug 2026504 AMAQI

26°C20/33°C

1st Aug 2026515 AMAQI
1st Aug 2026546 AMAQI
1st Aug 2026557 AMAQI
1st Aug 2026588 AMAQI
1st Aug 2026599 AMAQI
1st Aug 20266710 AMAQI
1st Aug 20266611 AMAQI
1st Aug 20266612 PMAQI
1st Aug 2026651 PMAQI
1st Aug 2026612 PMAQI
1st Aug 2026573 PMAQI
1st Aug 2026574 PMAQI
1st Aug 2026545 PMAQI
1st Aug 2026536 PMAQI
1st Aug 2026577 PMAQI
1st Aug 2026568 PMAQI
1st Aug 2026569 PMAQI
1st Aug 20265810 PMAQI
1st Aug 20265911 PMAQI
2nd Aug 20265812 AMAQI
2nd Aug 2026611 AMAQI
2nd Aug 2026622 AMAQI
2nd Aug 2026623 AMAQI
2nd Aug 2026644 AMAQI

28°C24/34°C

2nd Aug 2026655 AMAQI
2nd Aug 2026656 AMAQI
2nd Aug 2026627 AMAQI
2nd Aug 2026618 AMAQI
2nd Aug 2026669 AMAQI
2nd Aug 20266610 AMAQI
2nd Aug 20266011 AMAQI
2nd Aug 20265712 PMAQI
2nd Aug 2026621 PMAQI
2nd Aug 2026652 PMAQI
2nd Aug 2026603 PMAQI
2nd Aug 2026584 PMAQI
2nd Aug 2026505 PMAQI
2nd Aug 2026486 PMAQI
2nd Aug 2026487 PMAQI
2nd Aug 2026478 PMAQI
2nd Aug 2026509 PMAQI
2nd Aug 20265110 PMAQI
2nd Aug 20264911 PMAQI
3rd Aug 20264112 AMAQI
3rd Aug 2026391 AMAQI
3rd Aug 2026382 AMAQI
3rd Aug 2026393 AMAQI
3rd Aug 2026454 AMAQI

27°C23/34°C

3rd Aug 2026445 AMAQI
3rd Aug 2026446 AMAQI
3rd Aug 2026447 AMAQI
3rd Aug 2026468 AMAQI
3rd Aug 2026459 AMAQI
3rd Aug 20264510 AMAQI
3rd Aug 20265011 AMAQI
3rd Aug 20265912 PMAQI
3rd Aug 2026611 PMAQI
3rd Aug 2026622 PMAQI
3rd Aug 2026563 PMAQI
3rd Aug 2026554 PMAQI
3rd Aug 2026525 PMAQI
3rd Aug 2026506 PMAQI
3rd Aug 2026507 PMAQI
3rd Aug 2026428 PMAQI
3rd Aug 2026479 PMAQI
3rd Aug 20265410 PMAQI
3rd Aug 20265811 PMAQI
4th Aug 20266712 AMAQI
4th Aug 2026711 AMAQI
4th Aug 2026742 AMAQI
4th Aug 2026743 AMAQI
4th Aug 2026744 AMAQI

28°C21/36°C

4th Aug 2026765 AMAQI
4th Aug 2026766 AMAQI
4th Aug 2026747 AMAQI
4th Aug 2026728 AMAQI
4th Aug 2026699 AMAQI
4th Aug 20266510 AMAQI
4th Aug 20265911 AMAQI
4th Aug 20265512 PMAQI
4th Aug 2026541 PMAQI
4th Aug 2026582 PMAQI
4th Aug 2026573 PMAQI
4th Aug 2026544 PMAQI
4th Aug 2026535 PMAQI
4th Aug 2026496 PMAQI
4th Aug 2026447 PMAQI
4th Aug 2026498 PMAQI
4th Aug 2026519 PMAQI
4th Aug 20264310 PMAQI
4th Aug 20263211 PMAQI
5th Aug 20263112 AMAQI
5th Aug 2026301 AMAQI
5th Aug 2026282 AMAQI
5th Aug 2026273 AMAQI
5th Aug 2026274 AMAQI

28°C24/36°C

5th Aug 2026255 AMAQI
5 AM
5th Aug 2026246 AMAQI
5th Aug 2026227 AMAQI
5th Aug 2026238 AMAQI
5th Aug 2026309 AMAQI
5th Aug 20263310 AMAQI
5th Aug 20263111 AMAQI
5th Aug 20262312 PMAQI
12 PM
5th Aug 2026171 PMAQI
5th Aug 2026162 PMAQI
5th Aug 2026173 PMAQI
5th Aug 2026224 PMAQI
5th Aug 2026225 PMAQI
5th Aug 2026226 PMAQI
5th Aug 2026227 PMAQI
7 PM
5th Aug 2026228 PMAQI
5th Aug 2026259 PMAQI
5th Aug 20262410 PMAQI
5th Aug 20263311 PMAQI
12 AM
4 AM

28°C23/35°C

Day time
Avg. Highest Time
5 AM - 7 PM

37AQI

15 hours / Day
450 hours / Month
Avg. Lowest Time
5 AM - 6 PM

37AQI

14 hours / Day
420 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 PM (Avg. 37), while the lowest AQI was between 5 AM to 6 PM (Avg. 37).
Night time
Avg. Highest Time
12 AM - 4 AM

36AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
12 AM - 11 PM

36AQI

9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 4 AM (Avg. 36), while the lowest AQI was between 12 AM to 11 PM (Avg. 36).

2026 Days Vs Air Quality

Cheongju, Chungbuk, South Korea

2026

50%

108

41%

88

8%

17

0.4%

1

Total number of days with different AQI categories in last 217 days in 2026 (148 days remaining)

Good
108 Days
Moderate
88 Days
Poor
17 Days
Unhealthy
1 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 50%

Health Risk Level:

Considerable

In 2026, 50% of 217 days were within WHO’s safe air quality limits, and 50% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.

Annual Air Quality Insights

Cheongju, Chungbuk, South Korea

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
38AQI (US)
2nd January 2026
43AQI (US)
3rd January 2026
64AQI (US)
4th January 2026
89AQI (US)
5th January 2026
72AQI (US)
6th January 2026
59AQI (US)
7th January 2026
67AQI (US)
8th January 2026
37AQI (US)
9th January 2026
50AQI (US)
10th January 2026
64AQI (US)
11th January 2026
33AQI (US)
12th January 2026
50AQI (US)
13th January 2026
50AQI (US)
14th January 2026
36AQI (US)
15th January 2026
94AQI (US)
16th January 2026
151AQI (US)
17th January 2026
129AQI (US)
18th January 2026
119AQI (US)
19th January 2026
78AQI (US)
20th January 2026
41AQI (US)
21st January 2026
48AQI (US)
22nd January 2026
34AQI (US)
23rd January 2026
69AQI (US)
24th January 2026
61AQI (US)
25th January 2026
34AQI (US)
26th January 2026
57AQI (US)
27th January 2026
63AQI (US)
28th January 2026
43AQI (US)
29th January 2026
54AQI (US)
30th January 2026
54AQI (US)
31st January 2026
80AQI (US)
1st February 2026
79AQI (US)
2nd February 2026
71AQI (US)
3rd February 2026
64AQI (US)
4th February 2026
114AQI (US)
5th February 2026
129AQI (US)
6th February 2026
69AQI (US)
7th February 2026
46AQI (US)
8th February 2026
45AQI (US)
9th February 2026
50AQI (US)
10th February 2026
78AQI (US)
11th February 2026
113AQI (US)
12th February 2026
126AQI (US)
13th February 2026
127AQI (US)
14th February 2026
146AQI (US)
15th February 2026
118AQI (US)
16th February 2026
49AQI (US)
17th February 2026
62AQI (US)
18th February 2026
52AQI (US)
19th February 2026
42AQI (US)
20th February 2026
77AQI (US)
21st February 2026
102AQI (US)
22nd February 2026
58AQI (US)
23rd February 2026
30AQI (US)
24th February 2026
49AQI (US)
25th February 2026
57AQI (US)
26th February 2026
31AQI (US)
27th February 2026
22AQI (US)
28th February 2026
47AQI (US)
1st March 2026
34AQI (US)
2nd March 2026
46AQI (US)
3rd March 2026
35AQI (US)
4th March 2026
55AQI (US)
5th March 2026
74AQI (US)
6th March 2026
70AQI (US)
7th March 2026
57AQI (US)
8th March 2026
60AQI (US)
9th March 2026
80AQI (US)
10th March 2026
124AQI (US)
11th March 2026
98AQI (US)
12th March 2026
105AQI (US)
13th March 2026
38AQI (US)
14th March 2026
44AQI (US)
15th March 2026
85AQI (US)
16th March 2026
123AQI (US)
17th March 2026
116AQI (US)
18th March 2026
125AQI (US)
19th March 2026
70AQI (US)
20th March 2026
57AQI (US)
21st March 2026
93AQI (US)
22nd March 2026
84AQI (US)
23rd March 2026
86AQI (US)
24th March 2026
101AQI (US)
25th March 2026
85AQI (US)
26th March 2026
86AQI (US)
27th March 2026
112AQI (US)
28th March 2026
95AQI (US)
29th March 2026
76AQI (US)
30th March 2026
93AQI (US)
31st March 2026
45AQI (US)
1st April 2026
43AQI (US)
2nd April 2026
68AQI (US)
3rd April 2026
96AQI (US)
4th April 2026
36AQI (US)
5th April 2026
53AQI (US)
6th April 2026
50AQI (US)
7th April 2026
26AQI (US)
8th April 2026
34AQI (US)
9th April 2026
56AQI (US)
10th April 2026
32AQI (US)
11th April 2026
59AQI (US)
12th April 2026
67AQI (US)
13th April 2026
53AQI (US)
14th April 2026
41AQI (US)
15th April 2026
49AQI (US)
16th April 2026
43AQI (US)
17th April 2026
18th April 2026
56AQI (US)
19th April 2026
57AQI (US)
20th April 2026
66AQI (US)
21st April 2026
62AQI (US)
22nd April 2026
23rd April 2026
51AQI (US)
24th April 2026
32AQI (US)
25th April 2026
51AQI (US)
26th April 2026
54AQI (US)
27th April 2026
51AQI (US)
28th April 2026
45AQI (US)
29th April 2026
45AQI (US)
30th April 2026
55AQI (US)
1st May 2026
44AQI (US)
2nd May 2026
75AQI (US)
3rd May 2026
57AQI (US)
4th May 2026
28AQI (US)
5th May 2026
38AQI (US)
6th May 2026
36AQI (US)
7th May 2026
39AQI (US)
8th May 2026
33AQI (US)
9th May 2026
10th May 2026
34AQI (US)
11th May 2026
35AQI (US)
12th May 2026
40AQI (US)
13th May 2026
62AQI (US)
14th May 2026
51AQI (US)
15th May 2026
35AQI (US)
16th May 2026
77AQI (US)
17th May 2026
65AQI (US)
18th May 2026
56AQI (US)
19th May 2026
53AQI (US)
20th May 2026
63AQI (US)
21st May 2026
66AQI (US)
22nd May 2026
76AQI (US)
23rd May 2026
71AQI (US)
24th May 2026
70AQI (US)
25th May 2026
65AQI (US)
26th May 2026
48AQI (US)
27th May 2026
26AQI (US)
28th May 2026
29AQI (US)
29th May 2026
61AQI (US)
30th May 2026
41AQI (US)
31st May 2026
45AQI (US)
1st June 2026
51AQI (US)
2nd June 2026
58AQI (US)
3rd June 2026
66AQI (US)
4th June 2026
55AQI (US)
5th June 2026
27AQI (US)
6th June 2026
32AQI (US)
7th June 2026
22AQI (US)
8th June 2026
45AQI (US)
9th June 2026
50AQI (US)
10th June 2026
34AQI (US)
11th June 2026
26AQI (US)
12th June 2026
27AQI (US)
13th June 2026
27AQI (US)
14th June 2026
47AQI (US)
15th June 2026
45AQI (US)
16th June 2026
43AQI (US)
17th June 2026
38AQI (US)
18th June 2026
67AQI (US)
19th June 2026
60AQI (US)
20th June 2026
18AQI (US)
21st June 2026
17AQI (US)
22nd June 2026
21AQI (US)
23rd June 2026
24AQI (US)
24th June 2026
19AQI (US)
25th June 2026
25AQI (US)
26th June 2026
29AQI (US)
27th June 2026
42AQI (US)
28th June 2026
54AQI (US)
29th June 2026
53AQI (US)
30th June 2026
52AQI (US)
1st July 2026
28AQI (US)
2nd July 2026
33AQI (US)
3rd July 2026
30AQI (US)
4th July 2026
45AQI (US)
5th July 2026
34AQI (US)
6th July 2026
25AQI (US)
7th July 2026
32AQI (US)
8th July 2026
30AQI (US)
9th July 2026
14AQI (US)
10th July 2026
29AQI (US)
11th July 2026
32AQI (US)
12th July 2026
33AQI (US)
13th July 2026
28AQI (US)
14th July 2026
26AQI (US)
15th July 2026
26AQI (US)
16th July 2026
58AQI (US)
17th July 2026
57AQI (US)
18th July 2026
40AQI (US)
19th July 2026
32AQI (US)
20th July 2026
33AQI (US)
21st July 2026
32AQI (US)
22nd July 2026
39AQI (US)
23rd July 2026
36AQI (US)
24th July 2026
38AQI (US)
25th July 2026
28AQI (US)
26th July 2026
27AQI (US)
27th July 2026
30AQI (US)
28th July 2026
44AQI (US)
29th July 2026
32AQI (US)
30th July 2026
25AQI (US)
31st July 2026
36AQI (US)
1st August 2026
57AQI (US)
2nd August 2026
58AQI (US)
3rd August 2026
48AQI (US)
4th August 2026
60AQI (US)
5th August 2026
25AQI (US)
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

63AQI (US)

73AQI (US)

79AQI (US)

51AQI (US)

51AQI (US)

39AQI (US)

33AQI (US)

50AQI (US)

No. of days

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

202655AQI (US)

13
15
2
1
10
10
8
6
18
7
12
16
15
15
21
9
29
2
2
3
108
88
17
1

Highest AQI (US) recorded in

March

79AQI (US)

Lowest AQI (US) recorded in

July

33AQI (US)

202560AQI (US)

1
25
5
1
26
1
4
24
3
7
23
15
16
11
19
24
7
26
5
28
2
17
14
1
25
4
3
26
2
138
212
15

Highest AQI (US) recorded in

January

82AQI (US)

Lowest AQI (US) recorded in

September

39AQI (US)

202458AQI (US)

6
17
8
10
14
4
1
5
23
3
8
18
4
12
18
1
7
23
27
4
18
13
24
6
17
14
9
21
2
29
145
200
20
1

Highest AQI (US) recorded in

January

79AQI (US)

Lowest AQI (US) recorded in

July

34AQI (US)

202366AQI (US)

5
18
5
2
1
18
7
2
3
18
10
8
17
4
1
8
22
1
7
23
16
14
1
14
17
18
12
11
19
1
7
20
2
9
14
7
1
107
212
38
6

Highest AQI (US) recorded in

February

95AQI (US)

Lowest AQI (US) recorded in

September

46AQI (US)

202268AQI (US)

2
18
9
1
2
13
6
1
5
19
7
6
23
1
6
24
1
17
13
11
14
3
20
8
1
13
18
3
23
3
1
4
23
4
92
196
32
3

Highest AQI (US) recorded in

January

87AQI (US)

Lowest AQI (US) recorded in

August

29AQI (US)

202167AQI (US)

6
17
7
5
14
9
4
16
10
1
8
21
1
9
19
1
1
1
5
24
1
26
5
22
9
26
4
8
20
3
6
16
6
2
10
12
9
135
177
47
3
1
1

Highest AQI (US) recorded in

March

90AQI (US)

Lowest AQI (US) recorded in

September

38AQI (US)

202063AQI (US)

3
8
2
4
16
1
3
13
2
7
23
23
8
23
8
19
11
10
18
3
5
16
8
1
7
13
11
104
134
27
1

Highest AQI (US) recorded in

December

83AQI (US)

Lowest AQI (US) recorded in

July

40AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2022(Avg.)
68AQI (US)
Least Polluted Year Recorded
2026(Avg.)
55AQI (US)

Cheongju's annual 2026 AQI (US) (55) shows an average percentage change of -13.3% (improved AQI (US)) compared to previous years: 2020 (63), 2021 (67), 2022 (68), 2023 (66), 2024 (58), 2025 (60).