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

2021
2022
2023
2024
2025
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 (6th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 47 of Good air quality, showing improvement over 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 6th Aug - 7th Aug 2025

Cheongju, Chungbuk, South Korea

AQI
Day
Night
.

5 AM6th Aug 2025

7 PM

4 AM7th Aug 2025

Day time
Avg. Highest Time
6AM6th Aug

54AQI

Avg. Lowest Time
9AM6th Aug

29AQI

Night time
Avg. Highest Time
1AM7th Aug

53AQI

Avg. Lowest Time
10PM6th Aug

45AQI

In the last 24 hours,

Cheongju's AQI reached its highest point of 54 at 6 AM during the Day, while the lowest point, 29, was recorded at 9 AM during the Day between 6th Aug and 7th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Cheongju, Chungbuk, South Korea

JulAug
08th - 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 - 06th06th - 07th07th
Day
Night
8th Jul 2025525 AMAQI
8th Jul 2025526 AMAQI
8th Jul 2025527 AMAQI
8th Jul 2025528 AMAQI
8th Jul 2025669 AMAQI
8th Jul 20256510 AMAQI
8th Jul 20256011 AMAQI
8th Jul 20255612 PMAQI
8th Jul 2025561 PMAQI
8th Jul 2025562 PMAQI
8th Jul 2025563 PMAQI
8th Jul 2025564 PMAQI
8th Jul 2025565 PMAQI
8th Jul 2025566 PMAQI
8th Jul 2025567 PMAQI
8th Jul 2025568 PMAQI
8th Jul 2025569 PMAQI
8th Jul 20255710 PMAQI
8th Jul 20255711 PMAQI
9th Jul 20255612 AMAQI
9th Jul 2025561 AMAQI
9th Jul 2025562 AMAQI
9th Jul 2025563 AMAQI
9th Jul 2025564 AMAQI

29°C23/36°C

9th Jul 2025565 AMAQI
9th Jul 2025576 AMAQI
9th Jul 2025577 AMAQI
9th Jul 2025578 AMAQI
9th Jul 2025549 AMAQI
9th Jul 20255110 AMAQI
9th Jul 20254811 AMAQI
9th Jul 20254912 PMAQI
9th Jul 2025461 PMAQI
9th Jul 2025422 PMAQI
9th Jul 2025403 PMAQI
9th Jul 2025404 PMAQI
9th Jul 2025405 PMAQI
9th Jul 2025406 PMAQI
9th Jul 2025407 PMAQI
9th Jul 2025438 PMAQI
9th Jul 2025519 PMAQI
9th Jul 20255110 PMAQI
9th Jul 20255111 PMAQI
10th Jul 20255012 AMAQI
10th Jul 2025501 AMAQI
10th Jul 2025502 AMAQI
10th Jul 2025563 AMAQI
10th Jul 2025564 AMAQI

28°C23/35°C

10th Jul 2025555 AMAQI
10th Jul 2025556 AMAQI
10th Jul 2025557 AMAQI
10th Jul 2025558 AMAQI
10th Jul 2025359 AMAQI
10th Jul 20253010 AMAQI
10th Jul 20253111 AMAQI
10th Jul 20253112 PMAQI
10th Jul 2025341 PMAQI
10th Jul 2025342 PMAQI
10th Jul 2025343 PMAQI
10th Jul 2025324 PMAQI
10th Jul 2025335 PMAQI
10th Jul 2025326 PMAQI
10th Jul 2025307 PMAQI
10th Jul 2025508 PMAQI
10th Jul 2025579 PMAQI
10th Jul 20255810 PMAQI
10th Jul 20255711 PMAQI
11th Jul 20255612 AMAQI
11th Jul 2025581 AMAQI
11th Jul 2025582 AMAQI
11th Jul 2025583 AMAQI
11th Jul 2025584 AMAQI

27°C21/34°C

11th Jul 2025595 AMAQI
11th Jul 2025586 AMAQI
11th Jul 2025537 AMAQI
11th Jul 2025538 AMAQI
11th Jul 2025319 AMAQI
11th Jul 20252610 AMAQI
11th Jul 20253211 AMAQI
11th Jul 20253412 PMAQI
11th Jul 2025361 PMAQI
11th Jul 2025332 PMAQI
11th Jul 2025363 PMAQI
11th Jul 2025384 PMAQI
11th Jul 2025405 PMAQI
11th Jul 2025406 PMAQI
11th Jul 2025397 PMAQI
11th Jul 2025458 PMAQI
11th Jul 2025539 PMAQI
11th Jul 20255210 PMAQI
11th Jul 20255111 PMAQI
12th Jul 20255112 AMAQI
12th Jul 2025531 AMAQI
12th Jul 2025572 AMAQI
12th Jul 2025573 AMAQI
12th Jul 2025564 AMAQI

26°C21/33°C

12th Jul 2025555 AMAQI
12th Jul 2025556 AMAQI
12th Jul 2025557 AMAQI
12th Jul 2025558 AMAQI
12th Jul 2025379 AMAQI
12th Jul 20253210 AMAQI
12th Jul 20253511 AMAQI
12th Jul 20253312 PMAQI
12th Jul 2025361 PMAQI
12th Jul 2025362 PMAQI
12th Jul 2025333 PMAQI
12th Jul 2025334 PMAQI
12th Jul 2025365 PMAQI
12th Jul 2025336 PMAQI
12th Jul 2025427 PMAQI
12th Jul 2025468 PMAQI
12th Jul 2025519 PMAQI
12th Jul 20255310 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255112 AMAQI
13th Jul 2025531 AMAQI
13th Jul 2025552 AMAQI
13th Jul 2025553 AMAQI
13th Jul 2025544 AMAQI

26°C19/33°C

13th Jul 2025535 AMAQI
13th Jul 2025536 AMAQI
13th Jul 2025537 AMAQI
13th Jul 2025538 AMAQI
13th Jul 2025499 AMAQI
13th Jul 20254910 AMAQI
13th Jul 20255311 AMAQI
13th Jul 20255312 PMAQI
13th Jul 2025551 PMAQI
13th Jul 2025562 PMAQI
13th Jul 2025593 PMAQI
13th Jul 2025614 PMAQI
13th Jul 2025675 PMAQI
13th Jul 2025716 PMAQI
13th Jul 2025717 PMAQI
13th Jul 2025708 PMAQI
13th Jul 2025629 PMAQI
13th Jul 20256110 PMAQI
13th Jul 20255811 PMAQI
14th Jul 20255512 AMAQI
14th Jul 2025541 AMAQI
14th Jul 2025542 AMAQI
14th Jul 2025543 AMAQI
14th Jul 2025544 AMAQI

23°C19/28°C

14th Jul 2025545 AMAQI
14th Jul 2025546 AMAQI
14th Jul 2025547 AMAQI
14th Jul 2025548 AMAQI
14th Jul 2025439 AMAQI
14th Jul 20253810 AMAQI
14th Jul 20255411 AMAQI
14th Jul 20255712 PMAQI
14th Jul 2025591 PMAQI
14th Jul 2025652 PMAQI
14th Jul 2025673 PMAQI
14th Jul 2025684 PMAQI
14th Jul 2025665 PMAQI
14th Jul 2025466 PMAQI
14th Jul 2025387 PMAQI
14th Jul 2025448 PMAQI
14th Jul 2025519 PMAQI
14th Jul 20255010 PMAQI
14th Jul 20254511 PMAQI
15th Jul 20254412 AMAQI
15th Jul 2025531 AMAQI
15th Jul 2025542 AMAQI
15th Jul 2025543 AMAQI
15th Jul 2025544 AMAQI

22°C19/27°C

15th Jul 2025555 AMAQI
15th Jul 2025556 AMAQI
15th Jul 2025557 AMAQI
15th Jul 2025558 AMAQI
15th Jul 2025279 AMAQI
15th Jul 20251510 AMAQI
15th Jul 20251611 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025261 PMAQI
15th Jul 2025272 PMAQI
15th Jul 2025283 PMAQI
15th Jul 2025284 PMAQI
15th Jul 2025265 PMAQI
15th Jul 2025246 PMAQI
15th Jul 2025277 PMAQI
15th Jul 2025348 PMAQI
15th Jul 2025469 PMAQI
15th Jul 20254610 PMAQI
15th Jul 20254811 PMAQI
16th Jul 20254812 AMAQI
16th Jul 2025521 AMAQI
16th Jul 2025532 AMAQI
16th Jul 2025533 AMAQI
16th Jul 2025524 AMAQI

21°C19/24°C

16th Jul 2025505 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025507 AMAQI
16th Jul 2025508 AMAQI
16th Jul 2025519 AMAQI
16th Jul 20254910 AMAQI
16th Jul 20254811 AMAQI
16th Jul 20254812 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025532 PMAQI
16th Jul 2025523 PMAQI
16th Jul 2025484 PMAQI
16th Jul 2025475 PMAQI
16th Jul 2025486 PMAQI
16th Jul 2025437 PMAQI
16th Jul 2025418 PMAQI
16th Jul 2025479 PMAQI
16th Jul 20254810 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254912 AMAQI
17th Jul 2025521 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
17th Jul 2025524 AMAQI

21°C19/24°C

17th Jul 2025525 AMAQI
17th Jul 2025526 AMAQI
17th Jul 2025527 AMAQI
17th Jul 2025528 AMAQI
17th Jul 2025319 AMAQI
17th Jul 20252210 AMAQI
17th Jul 20252211 AMAQI
17th Jul 20252212 PMAQI
17th Jul 2025251 PMAQI
17th Jul 2025242 PMAQI
17th Jul 2025243 PMAQI
17th Jul 2025224 PMAQI
17th Jul 2025245 PMAQI
17th Jul 2025246 PMAQI
17th Jul 2025247 PMAQI
17th Jul 2025288 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20253910 PMAQI
17th Jul 20253911 PMAQI
18th Jul 20253912 AMAQI
18th Jul 2025471 AMAQI
18th Jul 2025512 AMAQI
18th Jul 2025513 AMAQI
18th Jul 2025504 AMAQI

23°C20/26°C

18th Jul 2025485 AMAQI
18th Jul 2025486 AMAQI
18th Jul 2025487 AMAQI
18th Jul 2025488 AMAQI
18th Jul 2025299 AMAQI
18th Jul 20252710 AMAQI
18th Jul 20252711 AMAQI
18th Jul 20252412 PMAQI
18th Jul 2025281 PMAQI
18th Jul 2025282 PMAQI
18th Jul 2025273 PMAQI
18th Jul 2025294 PMAQI
18th Jul 2025265 PMAQI
18th Jul 2025266 PMAQI
18th Jul 2025287 PMAQI
18th Jul 2025388 PMAQI
18th Jul 2025439 PMAQI
18th Jul 20254210 PMAQI
18th Jul 20254011 PMAQI
19th Jul 20253912 AMAQI
19th Jul 2025431 AMAQI
19th Jul 2025482 AMAQI
19th Jul 2025483 AMAQI
19th Jul 2025464 AMAQI

23°C20/27°C

19th Jul 2025445 AMAQI
19th Jul 2025446 AMAQI
19th Jul 2025447 AMAQI
19th Jul 2025448 AMAQI
19th Jul 2025219 AMAQI
19th Jul 20251310 AMAQI
19th Jul 20251311 AMAQI
19th Jul 20251412 PMAQI
19th Jul 2025181 PMAQI
19th Jul 2025182 PMAQI
19th Jul 2025173 PMAQI
19th Jul 2025174 PMAQI
19th Jul 2025175 PMAQI
19th Jul 2025166 PMAQI
19th Jul 2025177 PMAQI
19th Jul 2025258 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253210 PMAQI
19th Jul 20253211 PMAQI
20th Jul 20253212 AMAQI
20th Jul 2025401 AMAQI
20th Jul 2025452 AMAQI
20th Jul 2025453 AMAQI
20th Jul 2025434 AMAQI

25°C22/28°C

20th Jul 2025395 AMAQI
20th Jul 2025406 AMAQI
20th Jul 2025397 AMAQI
20th Jul 2025398 AMAQI
20th Jul 2025289 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025232 PMAQI
20th Jul 2025223 PMAQI
20th Jul 2025254 PMAQI
20th Jul 2025385 PMAQI
20th Jul 2025396 PMAQI
20th Jul 2025457 PMAQI
20th Jul 2025448 PMAQI
20th Jul 2025449 PMAQI
20th Jul 20254510 PMAQI
20th Jul 20254411 PMAQI
21st Jul 20254312 AMAQI
21st Jul 2025411 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025413 AMAQI
21st Jul 2025404 AMAQI

27°C22/33°C

21st Jul 2025375 AMAQI
21st Jul 2025376 AMAQI
21st Jul 2025377 AMAQI
21st Jul 2025378 AMAQI
21st Jul 2025489 AMAQI
21st Jul 20255510 AMAQI
21st Jul 20255711 AMAQI
21st Jul 20255612 PMAQI
21st Jul 2025511 PMAQI
21st Jul 2025442 PMAQI
21st Jul 2025413 PMAQI
21st Jul 2025404 PMAQI
21st Jul 2025325 PMAQI
21st Jul 2025316 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025288 PMAQI
21st Jul 2025319 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253312 AMAQI
22nd Jul 2025381 AMAQI
22nd Jul 2025412 AMAQI
22nd Jul 2025413 AMAQI
22nd Jul 2025414 AMAQI

27°C22/31°C

22nd Jul 2025435 AMAQI
22nd Jul 2025446 AMAQI
22nd Jul 2025437 AMAQI
22nd Jul 2025438 AMAQI
22nd Jul 2025319 AMAQI
22nd Jul 20252810 AMAQI
22nd Jul 20252811 AMAQI
22nd Jul 20252712 PMAQI
22nd Jul 2025261 PMAQI
22nd Jul 2025272 PMAQI
22nd Jul 2025253 PMAQI
22nd Jul 2025264 PMAQI
22nd Jul 2025255 PMAQI
22nd Jul 2025266 PMAQI
22nd Jul 2025257 PMAQI
22nd Jul 2025288 PMAQI
22nd Jul 2025359 PMAQI
22nd Jul 20253710 PMAQI
22nd Jul 20253711 PMAQI
23rd Jul 20254512 AMAQI
23rd Jul 2025461 AMAQI
23rd Jul 2025452 AMAQI
23rd Jul 2025423 AMAQI
23rd Jul 2025404 AMAQI

26°C22/31°C

23rd Jul 2025385 AMAQI
23rd Jul 2025386 AMAQI
23rd Jul 2025387 AMAQI
23rd Jul 2025388 AMAQI
23rd Jul 2025479 AMAQI
23rd Jul 20254910 AMAQI
23rd Jul 20255411 AMAQI
23rd Jul 20255712 PMAQI
23rd Jul 2025501 PMAQI
23rd Jul 2025472 PMAQI
23rd Jul 2025483 PMAQI
23rd Jul 2025494 PMAQI
23rd Jul 2025495 PMAQI
23rd Jul 2025496 PMAQI
23rd Jul 2025507 PMAQI
23rd Jul 2025548 PMAQI
23rd Jul 2025499 PMAQI
23rd Jul 20254810 PMAQI
23rd Jul 20254811 PMAQI
24th Jul 20254812 AMAQI
24th Jul 2025421 AMAQI
24th Jul 2025422 AMAQI
24th Jul 2025423 AMAQI
24th Jul 2025434 AMAQI

27°C22/32°C

24th Jul 2025445 AMAQI
24th Jul 2025446 AMAQI
24th Jul 2025447 AMAQI
24th Jul 2025448 AMAQI
24th Jul 2025559 AMAQI
24th Jul 20256010 AMAQI
24th Jul 20256411 AMAQI
24th Jul 20256612 PMAQI
24th Jul 2025671 PMAQI
24th Jul 2025662 PMAQI
24th Jul 2025623 PMAQI
24th Jul 2025594 PMAQI
24th Jul 2025605 PMAQI
24th Jul 2025606 PMAQI
24th Jul 2025637 PMAQI
24th Jul 2025618 PMAQI
24th Jul 2025579 PMAQI
24th Jul 20255810 PMAQI
24th Jul 20255811 PMAQI
25th Jul 20255812 AMAQI
25th Jul 2025581 AMAQI
25th Jul 2025502 AMAQI
25th Jul 2025453 AMAQI
25th Jul 2025474 AMAQI

27°C22/34°C

25th Jul 2025515 AMAQI
25th Jul 2025516 AMAQI
25th Jul 2025507 AMAQI
25th Jul 2025518 AMAQI
25th Jul 2025649 AMAQI
25th Jul 20256710 AMAQI
25th Jul 20256211 AMAQI
25th Jul 20255312 PMAQI
25th Jul 2025461 PMAQI
25th Jul 2025432 PMAQI
25th Jul 2025443 PMAQI
25th Jul 2025364 PMAQI
25th Jul 2025395 PMAQI
25th Jul 2025376 PMAQI
25th Jul 2025377 PMAQI
25th Jul 2025438 PMAQI
25th Jul 2025519 PMAQI
25th Jul 20255210 PMAQI
25th Jul 20255411 PMAQI
26th Jul 20255412 AMAQI
26th Jul 2025531 AMAQI
26th Jul 2025532 AMAQI
26th Jul 2025533 AMAQI
26th Jul 2025534 AMAQI

28°C22/35°C

26th Jul 2025535 AMAQI
26th Jul 2025536 AMAQI
26th Jul 2025537 AMAQI
26th Jul 2025538 AMAQI
26th Jul 2025419 AMAQI
26th Jul 20253010 AMAQI
26th Jul 20252711 AMAQI
26th Jul 20252512 PMAQI
26th Jul 2025281 PMAQI
26th Jul 2025282 PMAQI
26th Jul 2025243 PMAQI
26th Jul 2025234 PMAQI
26th Jul 2025235 PMAQI
26th Jul 2025276 PMAQI
26th Jul 2025307 PMAQI
26th Jul 2025408 PMAQI
26th Jul 2025509 PMAQI
26th Jul 20254910 PMAQI
26th Jul 20255211 PMAQI
27th Jul 20255212 AMAQI
27th Jul 2025531 AMAQI
27th Jul 2025532 AMAQI
27th Jul 2025533 AMAQI
27th Jul 2025524 AMAQI

28°C22/35°C

27th Jul 2025515 AMAQI
27th Jul 2025516 AMAQI
27th Jul 2025517 AMAQI
27th Jul 2025508 AMAQI
27th Jul 2025369 AMAQI
27th Jul 20251910 AMAQI
27th Jul 20251911 AMAQI
27th Jul 20252012 PMAQI
27th Jul 2025211 PMAQI
27th Jul 2025262 PMAQI
27th Jul 2025253 PMAQI
27th Jul 2025244 PMAQI
27th Jul 2025225 PMAQI
27th Jul 2025206 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025298 PMAQI
27th Jul 2025409 PMAQI
27th Jul 20254210 PMAQI
27th Jul 20254211 PMAQI
28th Jul 20254312 AMAQI
28th Jul 2025511 AMAQI
28th Jul 2025522 AMAQI
28th Jul 2025523 AMAQI
28th Jul 2025504 AMAQI

29°C23/36°C

28th Jul 2025485 AMAQI
28th Jul 2025486 AMAQI
28th Jul 2025487 AMAQI
28th Jul 2025488 AMAQI
28th Jul 2025379 AMAQI
28th Jul 20253510 AMAQI
28th Jul 20253711 AMAQI
28th Jul 20254612 PMAQI
28th Jul 2025521 PMAQI
28th Jul 2025542 PMAQI
28th Jul 2025543 PMAQI
28th Jul 2025554 PMAQI
28th Jul 2025565 PMAQI
28th Jul 2025516 PMAQI
28th Jul 2025527 PMAQI
28th Jul 2025558 PMAQI
28th Jul 2025559 PMAQI
28th Jul 20255610 PMAQI
28th Jul 20255511 PMAQI
29th Jul 20255312 AMAQI
29th Jul 2025511 AMAQI
29th Jul 2025502 AMAQI
29th Jul 2025503 AMAQI
29th Jul 2025494 AMAQI

28°C23/34°C

29th Jul 2025495 AMAQI
29th Jul 2025496 AMAQI
29th Jul 2025507 AMAQI
29th Jul 2025498 AMAQI
29th Jul 2025659 AMAQI
29th Jul 20257110 AMAQI
29th Jul 20257011 AMAQI
29th Jul 20256812 PMAQI
29th Jul 2025641 PMAQI
29th Jul 2025642 PMAQI
29th Jul 2025573 PMAQI
29th Jul 2025494 PMAQI
29th Jul 2025485 PMAQI
29th Jul 2025446 PMAQI
29th Jul 2025407 PMAQI
29th Jul 2025408 PMAQI
29th Jul 2025449 PMAQI
29th Jul 20254910 PMAQI
29th Jul 20255011 PMAQI
30th Jul 20254912 AMAQI
30th Jul 2025511 AMAQI
30th Jul 2025512 AMAQI
30th Jul 2025513 AMAQI
30th Jul 2025524 AMAQI

29°C23/36°C

30th Jul 2025545 AMAQI
30th Jul 2025546 AMAQI
30th Jul 2025547 AMAQI
30th Jul 2025548 AMAQI
30th Jul 2025579 AMAQI
30th Jul 20255510 AMAQI
30th Jul 20254811 AMAQI
30th Jul 20254512 PMAQI
30th Jul 2025401 PMAQI
30th Jul 2025402 PMAQI
30th Jul 2025383 PMAQI
30th Jul 2025394 PMAQI
30th Jul 2025415 PMAQI
30th Jul 2025426 PMAQI
30th Jul 2025447 PMAQI
30th Jul 2025488 PMAQI
30th Jul 2025539 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255511 PMAQI
31st Jul 20255412 AMAQI
31st Jul 2025521 AMAQI
31st Jul 2025522 AMAQI
31st Jul 2025523 AMAQI
31st Jul 2025524 AMAQI

28°C23/34°C

31st Jul 2025525 AMAQI
31st Jul 2025526 AMAQI
31st Jul 2025527 AMAQI
31st Jul 2025528 AMAQI
31st Jul 2025529 AMAQI
31st Jul 20255210 AMAQI
31st Jul 20255411 AMAQI
31st Jul 20255512 PMAQI
31st Jul 2025541 PMAQI
31st Jul 2025512 PMAQI
31st Jul 2025493 PMAQI
31st Jul 2025474 PMAQI
31st Jul 2025465 PMAQI
31st Jul 2025416 PMAQI
31st Jul 2025427 PMAQI
31st Jul 2025478 PMAQI
31st Jul 2025539 PMAQI
31st Jul 20255310 PMAQI
31st Jul 20255311 PMAQI
1st Aug 20255512 AMAQI
1st Aug 2025531 AMAQI
1st Aug 2025532 AMAQI
1st Aug 2025543 AMAQI
1st Aug 2025544 AMAQI

28°C22/34°C

1st Aug 2025545 AMAQI
1st Aug 2025566 AMAQI
1st Aug 2025557 AMAQI
1st Aug 2025548 AMAQI
1st Aug 2025549 AMAQI
1st Aug 20256010 AMAQI
1st Aug 20255711 AMAQI
1st Aug 20255612 PMAQI
1st Aug 2025581 PMAQI
1st Aug 2025562 PMAQI
1st Aug 2025563 PMAQI
1st Aug 2025594 PMAQI
1st Aug 2025585 PMAQI
1st Aug 2025576 PMAQI
1st Aug 2025587 PMAQI
1st Aug 2025548 PMAQI
1st Aug 2025589 PMAQI
1st Aug 20256010 PMAQI
1st Aug 20255911 PMAQI
2nd Aug 20255712 AMAQI
2nd Aug 2025541 AMAQI
2nd Aug 2025552 AMAQI
2nd Aug 2025553 AMAQI
2nd Aug 2025554 AMAQI

28°C22/34°C

2nd Aug 2025555 AMAQI
2nd Aug 2025556 AMAQI
2nd Aug 2025557 AMAQI
2nd Aug 2025558 AMAQI
2nd Aug 2025759 AMAQI
2nd Aug 20257710 AMAQI
2nd Aug 20256911 AMAQI
2nd Aug 20258212 PMAQI
2nd Aug 2025741 PMAQI
2nd Aug 2025652 PMAQI
2nd Aug 2025663 PMAQI
2nd Aug 2025624 PMAQI
2nd Aug 2025625 PMAQI
2nd Aug 2025676 PMAQI
2nd Aug 2025647 PMAQI
2nd Aug 2025598 PMAQI
2nd Aug 2025589 PMAQI
2nd Aug 20255810 PMAQI
2nd Aug 20256111 PMAQI
3rd Aug 20255712 AMAQI
3rd Aug 2025541 AMAQI
3rd Aug 2025552 AMAQI
3rd Aug 2025553 AMAQI
3rd Aug 2025574 AMAQI

28°C24/34°C

3rd Aug 2025585 AMAQI
3rd Aug 2025576 AMAQI
3rd Aug 2025577 AMAQI
3rd Aug 2025588 AMAQI
3rd Aug 2025599 AMAQI
3rd Aug 20256110 AMAQI
3rd Aug 20256511 AMAQI
3rd Aug 20256612 PMAQI
3rd Aug 2025701 PMAQI
3rd Aug 2025652 PMAQI
3rd Aug 2025723 PMAQI
3rd Aug 2025644 PMAQI
3rd Aug 2025625 PMAQI
3rd Aug 2025646 PMAQI
3rd Aug 2025637 PMAQI
3rd Aug 2025598 PMAQI
3rd Aug 2025579 PMAQI
3rd Aug 20255610 PMAQI
3rd Aug 20255211 PMAQI
4th Aug 20255212 AMAQI
4th Aug 2025551 AMAQI
4th Aug 2025552 AMAQI
4th Aug 2025573 AMAQI
4th Aug 2025584 AMAQI

25°C24/28°C

4th Aug 2025585 AMAQI
4th Aug 2025586 AMAQI
4th Aug 2025587 AMAQI
4th Aug 2025598 AMAQI
4th Aug 2025359 AMAQI
4th Aug 20253710 AMAQI
4th Aug 20253511 AMAQI
4th Aug 20253512 PMAQI
4th Aug 2025401 PMAQI
4th Aug 2025402 PMAQI
4th Aug 2025423 PMAQI
4th Aug 2025424 PMAQI
4th Aug 2025475 PMAQI
4th Aug 2025476 PMAQI
4th Aug 2025367 PMAQI
4th Aug 2025508 PMAQI
4th Aug 2025559 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20255611 PMAQI
5th Aug 20255312 AMAQI
5th Aug 2025541 AMAQI
5th Aug 2025552 AMAQI
5th Aug 2025563 AMAQI
5th Aug 2025554 AMAQI

26°C22/30°C

5th Aug 2025555 AMAQI
5th Aug 2025546 AMAQI
5th Aug 2025547 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025429 AMAQI
5th Aug 20254610 AMAQI
5th Aug 20255211 AMAQI
5th Aug 20255212 PMAQI
5th Aug 2025441 PMAQI
5th Aug 2025482 PMAQI
5th Aug 2025473 PMAQI
5th Aug 2025444 PMAQI
5th Aug 2025465 PMAQI
5th Aug 2025436 PMAQI
5th Aug 2025407 PMAQI
5th Aug 2025458 PMAQI
5th Aug 2025479 PMAQI
5th Aug 20254910 PMAQI
5th Aug 20254611 PMAQI
6th Aug 20254912 AMAQI
6th Aug 2025541 AMAQI
6th Aug 2025542 AMAQI
6th Aug 2025553 AMAQI
6th Aug 2025544 AMAQI

26°C21/32°C

6th Aug 2025535 AMAQI
6th Aug 2025546 AMAQI
6th Aug 2025537 AMAQI
6th Aug 2025538 AMAQI
6th Aug 2025299 AMAQI
6th Aug 20253210 AMAQI
6th Aug 20253011 AMAQI
6th Aug 20253412 PMAQI
6th Aug 2025341 PMAQI
6th Aug 2025382 PMAQI
6th Aug 2025393 PMAQI
6th Aug 2025384 PMAQI
6th Aug 2025395 PMAQI
6th Aug 2025396 PMAQI
6th Aug 2025457 PMAQI
6th Aug 2025478 PMAQI
6th Aug 2025469 PMAQI
6th Aug 20254510 PMAQI
6th Aug 20254611 PMAQI
7th Aug 20254712 AMAQI
7th Aug 2025531 AMAQI
7th Aug 2025532 AMAQI
7th Aug 2025533 AMAQI
7th Aug 2025524 AMAQI

26°C24/29°C

7th Aug 2025515 AMAQI
5 AM
7th Aug 2025506 AMAQI
7th Aug 2025507 AMAQI
7th Aug 2025518 AMAQI
7th Aug 2025369 AMAQI
7th Aug 20254010 AMAQI
7th Aug 20254411 AMAQI
7th Aug 20254212 PMAQI
12 PM
7th Aug 2025431 PMAQI
7th Aug 2025482 PMAQI
7th Aug 2025453 PMAQI
7th Aug 2025484 PMAQI
7 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 AM

51AQI

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

43AQI

11 hours / Day
330 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 AM (Avg. 51), while the lowest AQI was between 9 AM to 7 PM (Avg. 43).
Night time
Avg. Highest Time
12 AM - 4 AM

51AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
8 PM

45AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 4 AM (Avg. 51), while the lowest AQI was between 8 PM to 8 PM (Avg. 45).

2025 Days Vs Air Quality

Cheongju, Chungbuk, South Korea

2025

30%

66

65%

142

5%

10

Total number of days with different AQI categories in last 219 days in 2025 (146 days remaining)

Good
66 Days
Moderate
142 Days
Poor
10 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 30%

Health Risk Level:

High

In 2025, 30% of 219 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.

Annual Air Quality Insights

Cheongju, Chungbuk, South Korea

AQI levels in 2025

AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

1st January 2025
71AQI
2nd January 2025
73AQI
3rd January 2025
60AQI
4th January 2025
61AQI
5th January 2025
66AQI
6th January 2025
92AQI
7th January 2025
60AQI
8th January 2025
72AQI
9th January 2025
43AQI
10th January 2025
62AQI
11th January 2025
63AQI
12th January 2025
84AQI
13th January 2025
89AQI
14th January 2025
93AQI
15th January 2025
61AQI
16th January 2025
71AQI
17th January 2025
95AQI
18th January 2025
96AQI
19th January 2025
96AQI
20th January 2025
115AQI
21st January 2025
141AQI
22nd January 2025
140AQI
23rd January 2025
127AQI
24th January 2025
122AQI
25th January 2025
87AQI
26th January 2025
63AQI
27th January 2025
69AQI
28th January 2025
56AQI
29th January 2025
63AQI
30th January 2025
59AQI
31st January 2025
82AQI
1st February 2025
92AQI
2nd February 2025
91AQI
3rd February 2025
65AQI
4th February 2025
57AQI
5th February 2025
51AQI
6th February 2025
53AQI
7th February 2025
51AQI
8th February 2025
48AQI
9th February 2025
58AQI
10th February 2025
61AQI
11th February 2025
83AQI
12th February 2025
82AQI
13th February 2025
54AQI
14th February 2025
80AQI
15th February 2025
60AQI
16th February 2025
103AQI
17th February 2025
55AQI
18th February 2025
65AQI
19th February 2025
51AQI
20th February 2025
57AQI
21st February 2025
56AQI
22nd February 2025
60AQI
23rd February 2025
59AQI
24th February 2025
57AQI
25th February 2025
57AQI
26th February 2025
75AQI
27th February 2025
64AQI
28th February 2025
78AQI
1st March 2025
105AQI
2nd March 2025
82AQI
3rd March 2025
58AQI
4th March 2025
48AQI
5th March 2025
43AQI
6th March 2025
70AQI
7th March 2025
83AQI
8th March 2025
79AQI
9th March 2025
88AQI
10th March 2025
89AQI
11th March 2025
102AQI
12th March 2025
93AQI
13th March 2025
95AQI
14th March 2025
81AQI
15th March 2025
52AQI
16th March 2025
68AQI
17th March 2025
60AQI
18th March 2025
72AQI
19th March 2025
76AQI
20th March 2025
86AQI
21st March 2025
90AQI
22nd March 2025
98AQI
23rd March 2025
99AQI
24th March 2025
101AQI
25th March 2025
124AQI
26th March 2025
81AQI
27th March 2025
89AQI
28th March 2025
69AQI
29th March 2025
50AQI
30th March 2025
49AQI
31st March 2025
57AQI
1st April 2025
71AQI
2nd April 2025
71AQI
3rd April 2025
77AQI
4th April 2025
80AQI
5th April 2025
65AQI
6th April 2025
65AQI
7th April 2025
63AQI
8th April 2025
73AQI
9th April 2025
64AQI
10th April 2025
73AQI
11th April 2025
76AQI
12th April 2025
61AQI
13th April 2025
58AQI
14th April 2025
43AQI
15th April 2025
52AQI
16th April 2025
60AQI
17th April 2025
63AQI
18th April 2025
77AQI
19th April 2025
52AQI
20th April 2025
58AQI
21st April 2025
40AQI
22nd April 2025
40AQI
23rd April 2025
31AQI
24th April 2025
56AQI
25th April 2025
56AQI
26th April 2025
48AQI
27th April 2025
40AQI
28th April 2025
49AQI
29th April 2025
59AQI
30th April 2025
54AQI
1st May 2025
47AQI
2nd May 2025
50AQI
3rd May 2025
48AQI
4th May 2025
44AQI
5th May 2025
46AQI
6th May 2025
41AQI
7th May 2025
50AQI
8th May 2025
67AQI
9th May 2025
45AQI
10th May 2025
45AQI
11th May 2025
63AQI
12th May 2025
65AQI
13th May 2025
68AQI
14th May 2025
70AQI
15th May 2025
52AQI
16th May 2025
47AQI
17th May 2025
44AQI
18th May 2025
57AQI
19th May 2025
57AQI
20th May 2025
40AQI
21st May 2025
41AQI
22nd May 2025
51AQI
23rd May 2025
55AQI
24th May 2025
45AQI
25th May 2025
43AQI
26th May 2025
56AQI
27th May 2025
65AQI
28th May 2025
73AQI
29th May 2025
74AQI
30th May 2025
59AQI
31st May 2025
69AQI
1st June 2025
80AQI
2nd June 2025
94AQI
3rd June 2025
79AQI
4th June 2025
57AQI
5th June 2025
52AQI
6th June 2025
58AQI
7th June 2025
63AQI
8th June 2025
61AQI
9th June 2025
59AQI
10th June 2025
58AQI
11th June 2025
51AQI
12th June 2025
52AQI
13th June 2025
60AQI
14th June 2025
39AQI
15th June 2025
48AQI
16th June 2025
54AQI
17th June 2025
60AQI
18th June 2025
62AQI
19th June 2025
62AQI
20th June 2025
45AQI
21st June 2025
40AQI
22nd June 2025
34AQI
23rd June 2025
47AQI
24th June 2025
43AQI
25th June 2025
34AQI
26th June 2025
45AQI
27th June 2025
60AQI
28th June 2025
59AQI
29th June 2025
46AQI
30th June 2025
42AQI
1st July 2025
40AQI
2nd July 2025
37AQI
3rd July 2025
50AQI
4th July 2025
49AQI
5th July 2025
45AQI
6th July 2025
49AQI
7th July 2025
57AQI
8th July 2025
57AQI
9th July 2025
50AQI
10th July 2025
46AQI
11th July 2025
47AQI
12th July 2025
46AQI
13th July 2025
58AQI
14th July 2025
53AQI
15th July 2025
40AQI
16th July 2025
49AQI
17th July 2025
38AQI
18th July 2025
38AQI
19th July 2025
30AQI
20th July 2025
37AQI
21st July 2025
39AQI
22nd July 2025
34AQI
23rd July 2025
46AQI
24th July 2025
54AQI
25th July 2025
49AQI
26th July 2025
42AQI
27th July 2025
37AQI
28th July 2025
50AQI
29th July 2025
52AQI
30th July 2025
49AQI
31st July 2025
51AQI
1st August 2025
56AQI
2nd August 2025
62AQI
3rd August 2025
60AQI
4th August 2025
49AQI
5th August 2025
49AQI
6th August 2025
47AQI

82AQI

65AQI

79AQI

59AQI

54AQI

55AQI

46AQI

54AQI

No. of days

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

202563AQI

1
25
5
1
26
1
4
23
4
7
23
15
16
11
19
24
7
3
3
66
142
10

Highest AQI recorded in

January

82AQI

Lowest AQI recorded in

July

46AQI

202458AQI

6
17
8
11
13
4
1
5
23
3
8
18
4
11
19
1
8
22
27
4
17
14
24
6
17
14
8
22
2
29
144
201
20
1

Highest AQI recorded in

January

79AQI

Lowest AQI recorded in

July

34AQI

202366AQI

5
18
6
2
1
18
7
2
2
19
10
9
16
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
39
6

Highest AQI recorded in

February

95AQI

Lowest AQI recorded in

September

46AQI

202268AQI

2
19
9
1
2
13
6
1
5
19
7
6
23
1
6
24
1
17
13
10
15
3
20
8
1
13
18
3
22
4
1
4
23
4
91
197
33
3

Highest AQI recorded in

January

87AQI

Lowest AQI recorded in

August

29AQI

202167AQI

6
18
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
178
47
3
1
1

Highest AQI recorded in

March

90AQI

Lowest AQI recorded in

September

38AQI

202063AQI

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 recorded in

December

83AQI

Lowest AQI recorded in

July

40AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2022(Avg.)
68AQI
Least Polluted Year Recorded
2024(Avg.)
58AQI

Cheongju's annual 2025 AQI (63) shows an average percentage change of -2.7% (improved AQI) compared to previous years: 2020 (63), 2021 (67), 2022 (68), 2023 (66), 2024 (58).