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HistoryAQIPM2.5PM10COSO2NO2O3

Hainan Normal University, Haikou, Hainan, China 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+

September Air Quality Analysis

Hainan Normal University, Haikou, Hainan, China

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
6th Sep 2022
95AQI
Lowest AQI recorded on
1st Sep 2021
13AQI

Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 41 of Good air quality, showing improvement over 2022 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025

Hainan Normal University, Haikou, Hainan, China

AQI
Day
Night
.

6 AM21st Sep 2025

6 PM

5 AM22nd Sep 2025

Day time
Avg. Highest Time
5PM21st Sep

54AQI

Avg. Lowest Time
8AM21st Sep

36AQI

Night time
Avg. Highest Time
7PM21st Sep

52AQI

Avg. Lowest Time
2AM22nd Sep

38AQI

In the last 24 hours,

Hainan Normal University's AQI reached its highest point of 54 at 5 PM during the Day, while the lowest point, 36, was recorded at 8 AM during the Day between 21st Sep and 22nd Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025

Hainan Normal University, Haikou, Hainan, China

AugSep
23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd
Day
Night
23rd Aug 2025376 AMAQI
23rd Aug 2025387 AMAQI
23rd Aug 2025428 AMAQI
23rd Aug 2025379 AMAQI
23rd Aug 20252410 AMAQI
23rd Aug 20253411 AMAQI
23rd Aug 20253912 PMAQI
23rd Aug 2025371 PMAQI
23rd Aug 2025292 PMAQI
23rd Aug 2025283 PMAQI
23rd Aug 2025324 PMAQI
23rd Aug 2025285 PMAQI
23rd Aug 2025286 PMAQI
23rd Aug 2025317 PMAQI
23rd Aug 2025378 PMAQI
23rd Aug 2025469 PMAQI
23rd Aug 20254110 PMAQI
23rd Aug 20254111 PMAQI
24th Aug 20253912 AMAQI
24th Aug 2025411 AMAQI
24th Aug 2025402 AMAQI
24th Aug 2025403 AMAQI
24th Aug 2025404 AMAQI
24th Aug 2025405 AMAQI

28°C26/31°C

24th Aug 2025406 AMAQI
24th Aug 2025407 AMAQI
24th Aug 2025498 AMAQI
24th Aug 2025479 AMAQI
24th Aug 20253610 AMAQI
24th Aug 20253911 AMAQI
24th Aug 20253812 PMAQI
24th Aug 2025401 PMAQI
24th Aug 2025312 PMAQI
24th Aug 2025393 PMAQI
24th Aug 2025394 PMAQI
24th Aug 2025415 PMAQI
24th Aug 2025396 PMAQI
24th Aug 2025407 PMAQI
24th Aug 2025408 PMAQI
24th Aug 2025369 PMAQI
24th Aug 20253910 PMAQI
24th Aug 20253911 PMAQI
25th Aug 20253812 AMAQI
25th Aug 2025381 AMAQI
25th Aug 2025382 AMAQI
25th Aug 2025403 AMAQI
25th Aug 2025404 AMAQI
25th Aug 2025415 AMAQI

27°C26/28°C

25th Aug 2025426 AMAQI
25th Aug 2025407 AMAQI
25th Aug 2025208 AMAQI
25th Aug 2025269 AMAQI
25th Aug 20252310 AMAQI
25th Aug 20252211 AMAQI
25th Aug 20252512 PMAQI
25th Aug 2025251 PMAQI
25th Aug 2025282 PMAQI
25th Aug 2025343 PMAQI
25th Aug 2025214 PMAQI
25th Aug 2025285 PMAQI
25th Aug 2025266 PMAQI
25th Aug 2025347 PMAQI
25th Aug 2025318 PMAQI
25th Aug 2025329 PMAQI
25th Aug 20252910 PMAQI
25th Aug 20252811 PMAQI
26th Aug 20253312 AMAQI
26th Aug 2025391 AMAQI
26th Aug 2025402 AMAQI
26th Aug 2025383 AMAQI
26th Aug 2025384 AMAQI
26th Aug 2025395 AMAQI

26°C25/27°C

26th Aug 2025386 AMAQI
26th Aug 2025397 AMAQI
26th Aug 2025268 AMAQI
26th Aug 2025289 AMAQI
26th Aug 20253610 AMAQI
26th Aug 20252411 AMAQI
26th Aug 20252412 PMAQI
26th Aug 2025371 PMAQI
26th Aug 2025282 PMAQI
26th Aug 2025243 PMAQI
26th Aug 2025204 PMAQI
26th Aug 2025265 PMAQI
26th Aug 2025236 PMAQI
26th Aug 2025287 PMAQI
26th Aug 2025328 PMAQI
26th Aug 2025339 PMAQI
26th Aug 20253110 PMAQI
26th Aug 20253111 PMAQI
27th Aug 20253412 AMAQI
27th Aug 2025401 AMAQI
27th Aug 2025422 AMAQI
27th Aug 2025383 AMAQI
27th Aug 2025384 AMAQI
27th Aug 2025385 AMAQI

27°C26/30°C

27th Aug 2025386 AMAQI
27th Aug 2025397 AMAQI
27th Aug 2025388 AMAQI
27th Aug 2025319 AMAQI
27th Aug 20253710 AMAQI
27th Aug 20254811 AMAQI
27th Aug 20255212 PMAQI
27th Aug 2025321 PMAQI
27th Aug 2025332 PMAQI
27th Aug 2025303 PMAQI
27th Aug 2025354 PMAQI
27th Aug 2025345 PMAQI
27th Aug 2025336 PMAQI
27th Aug 2025327 PMAQI
27th Aug 2025318 PMAQI
27th Aug 2025479 PMAQI
27th Aug 20253510 PMAQI
27th Aug 20253411 PMAQI
28th Aug 20254012 AMAQI
28th Aug 2025411 AMAQI
28th Aug 2025412 AMAQI
28th Aug 2025403 AMAQI
28th Aug 2025414 AMAQI
28th Aug 2025385 AMAQI

27°C26/30°C

28th Aug 2025406 AMAQI
28th Aug 2025387 AMAQI
28th Aug 2025428 AMAQI
28th Aug 2025489 AMAQI
28th Aug 20255010 AMAQI
28th Aug 20253811 AMAQI
28th Aug 20254112 PMAQI
28th Aug 2025351 PMAQI
28th Aug 2025382 PMAQI
28th Aug 2025403 PMAQI
28th Aug 2025514 PMAQI
28th Aug 2025395 PMAQI
28th Aug 2025426 PMAQI
28th Aug 2025367 PMAQI
28th Aug 2025318 PMAQI
28th Aug 2025369 PMAQI
28th Aug 20253910 PMAQI
28th Aug 20253411 PMAQI
29th Aug 20253712 AMAQI
29th Aug 2025421 AMAQI
29th Aug 2025442 AMAQI
29th Aug 2025443 AMAQI
29th Aug 2025464 AMAQI
29th Aug 2025455 AMAQI

27°C25/29°C

29th Aug 2025466 AMAQI
29th Aug 2025467 AMAQI
29th Aug 2025508 AMAQI
29th Aug 2025389 AMAQI
29th Aug 20253810 AMAQI
29th Aug 20254611 AMAQI
29th Aug 20254812 PMAQI
29th Aug 2025431 PMAQI
29th Aug 2025482 PMAQI
29th Aug 2025403 PMAQI
29th Aug 2025404 PMAQI
29th Aug 2025395 PMAQI
29th Aug 2025506 PMAQI
29th Aug 2025447 PMAQI
29th Aug 2025438 PMAQI
29th Aug 2025389 PMAQI
29th Aug 20253610 PMAQI
29th Aug 20253911 PMAQI
30th Aug 20254212 AMAQI
30th Aug 2025451 AMAQI
30th Aug 2025462 AMAQI
30th Aug 2025463 AMAQI
30th Aug 2025464 AMAQI
30th Aug 2025465 AMAQI

27°C26/28°C

30th Aug 2025436 AMAQI
30th Aug 2025457 AMAQI
30th Aug 2025268 AMAQI
30th Aug 2025249 AMAQI
30th Aug 20252710 AMAQI
30th Aug 20253611 AMAQI
30th Aug 20253212 PMAQI
30th Aug 2025361 PMAQI
30th Aug 2025252 PMAQI
30th Aug 2025323 PMAQI
30th Aug 2025324 PMAQI
30th Aug 2025325 PMAQI
30th Aug 2025296 PMAQI
30th Aug 2025347 PMAQI
30th Aug 2025398 PMAQI
30th Aug 2025469 PMAQI
30th Aug 20254010 PMAQI
30th Aug 20254011 PMAQI
31st Aug 20253912 AMAQI
31st Aug 2025401 AMAQI
31st Aug 2025502 AMAQI
31st Aug 2025453 AMAQI
31st Aug 2025424 AMAQI
31st Aug 2025445 AMAQI

27°C26/28°C

31st Aug 2025436 AMAQI
31st Aug 2025427 AMAQI
31st Aug 2025318 AMAQI
31st Aug 2025289 AMAQI
31st Aug 20252610 AMAQI
31st Aug 20252411 AMAQI
31st Aug 20252412 PMAQI
31st Aug 2025411 PMAQI
31st Aug 2025292 PMAQI
31st Aug 2025353 PMAQI
31st Aug 2025384 PMAQI
31st Aug 2025275 PMAQI
31st Aug 2025316 PMAQI
31st Aug 2025337 PMAQI
31st Aug 2025338 PMAQI
31st Aug 2025369 PMAQI
31st Aug 20254310 PMAQI
31st Aug 20254111 PMAQI
1st Sep 20253612 AMAQI
1st Sep 2025391 AMAQI
1st Sep 2025442 AMAQI
1st Sep 2025453 AMAQI
1st Sep 2025424 AMAQI
1st Sep 2025455 AMAQI

27°C26/29°C

1st Sep 2025486 AMAQI
1st Sep 2025497 AMAQI
1st Sep 2025248 AMAQI
1st Sep 2025269 AMAQI
1st Sep 20253810 AMAQI
1st Sep 20253211 AMAQI
1st Sep 20253412 PMAQI
1st Sep 2025341 PMAQI
1st Sep 2025272 PMAQI
1st Sep 2025233 PMAQI
1st Sep 2025204 PMAQI
1st Sep 2025325 PMAQI
1st Sep 2025256 PMAQI
1st Sep 2025367 PMAQI
1st Sep 2025368 PMAQI
1st Sep 2025349 PMAQI
1st Sep 20253710 PMAQI
1st Sep 20253811 PMAQI
2nd Sep 20253912 AMAQI
2nd Sep 2025431 AMAQI
2nd Sep 2025442 AMAQI
2nd Sep 2025423 AMAQI
2nd Sep 2025414 AMAQI
2nd Sep 2025405 AMAQI

27°C26/30°C

2nd Sep 2025426 AMAQI
2nd Sep 2025447 AMAQI
2nd Sep 2025388 AMAQI
2nd Sep 2025439 AMAQI
2nd Sep 20253410 AMAQI
2nd Sep 20252211 AMAQI
2nd Sep 20252712 PMAQI
2nd Sep 2025301 PMAQI
2nd Sep 2025262 PMAQI
2nd Sep 2025263 PMAQI
2nd Sep 2025204 PMAQI
2nd Sep 2025185 PMAQI
2nd Sep 2025256 PMAQI
2nd Sep 2025307 PMAQI
2nd Sep 2025378 PMAQI
2nd Sep 2025399 PMAQI
2nd Sep 20253910 PMAQI
2nd Sep 20253711 PMAQI
3rd Sep 20253812 AMAQI
3rd Sep 2025401 AMAQI
3rd Sep 2025472 AMAQI
3rd Sep 2025443 AMAQI
3rd Sep 2025414 AMAQI
3rd Sep 2025405 AMAQI

28°C26/30°C

3rd Sep 2025406 AMAQI
3rd Sep 2025397 AMAQI
3rd Sep 2025258 AMAQI
3rd Sep 2025399 AMAQI
3rd Sep 20252810 AMAQI
3rd Sep 20253111 AMAQI
3rd Sep 20252712 PMAQI
3rd Sep 2025301 PMAQI
3rd Sep 2025282 PMAQI
3rd Sep 2025253 PMAQI
3rd Sep 2025224 PMAQI
3rd Sep 2025275 PMAQI
3rd Sep 2025256 PMAQI
3rd Sep 2025327 PMAQI
3rd Sep 2025348 PMAQI
3rd Sep 2025399 PMAQI
3rd Sep 20253210 PMAQI
3rd Sep 20253311 PMAQI
4th Sep 20253512 AMAQI
4th Sep 2025421 AMAQI
4th Sep 2025422 AMAQI
4th Sep 2025413 AMAQI
4th Sep 2025424 AMAQI
4th Sep 2025415 AMAQI

28°C26/30°C

4th Sep 2025396 AMAQI
4th Sep 2025387 AMAQI
4th Sep 2025318 AMAQI
4th Sep 2025409 AMAQI
4th Sep 20253510 AMAQI
4th Sep 20254311 AMAQI
4th Sep 20253412 PMAQI
4th Sep 2025211 PMAQI
4th Sep 2025252 PMAQI
4th Sep 2025283 PMAQI
4th Sep 2025194 PMAQI
4th Sep 2025195 PMAQI
4th Sep 2025226 PMAQI
4th Sep 2025287 PMAQI
4th Sep 2025308 PMAQI
4th Sep 2025329 PMAQI
4th Sep 20252610 PMAQI
4th Sep 20252711 PMAQI
5th Sep 20253812 AMAQI
5th Sep 2025411 AMAQI
5th Sep 2025392 AMAQI
5th Sep 2025383 AMAQI
5th Sep 2025374 AMAQI
5th Sep 2025435 AMAQI

28°C26/30°C

5th Sep 2025406 AMAQI
5th Sep 2025397 AMAQI
5th Sep 2025368 AMAQI
5th Sep 2025409 AMAQI
5th Sep 20252610 AMAQI
5th Sep 20252711 AMAQI
5th Sep 20253012 PMAQI
5th Sep 2025291 PMAQI
5th Sep 2025322 PMAQI
5th Sep 2025263 PMAQI
5th Sep 2025274 PMAQI
5th Sep 2025235 PMAQI
5th Sep 2025256 PMAQI
5th Sep 2025267 PMAQI
5th Sep 2025308 PMAQI
5th Sep 2025319 PMAQI
5th Sep 20253510 PMAQI
5th Sep 20252811 PMAQI
6th Sep 20252712 AMAQI
6th Sep 2025321 AMAQI
6th Sep 2025332 AMAQI
6th Sep 2025323 AMAQI
6th Sep 2025354 AMAQI
6th Sep 2025345 AMAQI

28°C26/30°C

6th Sep 2025356 AMAQI
6th Sep 2025367 AMAQI
6th Sep 2025208 AMAQI
6th Sep 2025319 AMAQI
6th Sep 20252410 AMAQI
6th Sep 20252311 AMAQI
6th Sep 20252812 PMAQI
6th Sep 2025191 PMAQI
6th Sep 2025192 PMAQI
6th Sep 2025253 PMAQI
6th Sep 2025204 PMAQI
6th Sep 2025245 PMAQI
6th Sep 2025246 PMAQI
6th Sep 2025267 PMAQI
6th Sep 2025238 PMAQI
6th Sep 2025329 PMAQI
6th Sep 20252910 PMAQI
6th Sep 20253211 PMAQI
7th Sep 20253312 AMAQI
7th Sep 2025321 AMAQI
7th Sep 2025342 AMAQI
7th Sep 2025333 AMAQI
7th Sep 2025314 AMAQI
7th Sep 2025325 AMAQI

28°C26/31°C

7th Sep 2025316 AMAQI
7th Sep 2025317 AMAQI
7th Sep 2025478 AMAQI
7th Sep 2025409 AMAQI
7th Sep 20255210 AMAQI
7th Sep 20255811 AMAQI
7th Sep 20254612 PMAQI
7th Sep 2025621 PMAQI
7th Sep 2025612 PMAQI
7th Sep 2025613 PMAQI
7th Sep 2025574 PMAQI
7th Sep 2025445 PMAQI
7th Sep 2025526 PMAQI
7th Sep 2025467 PMAQI
7th Sep 2025498 PMAQI
7th Sep 2025479 PMAQI
7th Sep 20254910 PMAQI
7th Sep 20254511 PMAQI
8th Sep 20254212 AMAQI
8th Sep 2025341 AMAQI
8th Sep 2025342 AMAQI
8th Sep 2025383 AMAQI
8th Sep 2025404 AMAQI
8th Sep 2025395 AMAQI

28°C26/30°C

8th Sep 2025386 AMAQI
8th Sep 2025397 AMAQI
8th Sep 2025478 AMAQI
8th Sep 2025479 AMAQI
8th Sep 20254210 AMAQI
8th Sep 20254011 AMAQI
8th Sep 20254212 PMAQI
8th Sep 2025461 PMAQI
8th Sep 2025452 PMAQI
8th Sep 2025453 PMAQI
8th Sep 2025374 PMAQI
8th Sep 2025405 PMAQI
8th Sep 2025416 PMAQI
8th Sep 2025467 PMAQI
8th Sep 2025508 PMAQI
8th Sep 2025519 PMAQI
8th Sep 20255010 PMAQI
8th Sep 20255211 PMAQI
9th Sep 20254612 AMAQI
9th Sep 2025401 AMAQI
9th Sep 2025382 AMAQI
9th Sep 2025383 AMAQI
9th Sep 2025424 AMAQI
9th Sep 2025405 AMAQI

27°C25/29°C

9th Sep 2025396 AMAQI
9th Sep 2025387 AMAQI
9th Sep 2025318 AMAQI
9th Sep 2025349 AMAQI
9th Sep 20253910 AMAQI
9th Sep 20253811 AMAQI
9th Sep 20253212 PMAQI
9th Sep 2025351 PMAQI
9th Sep 2025312 PMAQI
9th Sep 2025303 PMAQI
9th Sep 2025254 PMAQI
9th Sep 2025285 PMAQI
9th Sep 2025306 PMAQI
9th Sep 2025397 PMAQI
9th Sep 2025358 PMAQI
9th Sep 2025329 PMAQI
9th Sep 20253410 PMAQI
9th Sep 20253711 PMAQI
10th Sep 20254012 AMAQI
10th Sep 2025411 AMAQI
10th Sep 2025412 AMAQI
10th Sep 2025423 AMAQI
10th Sep 2025404 AMAQI
10th Sep 2025395 AMAQI

28°C25/32°C

10th Sep 2025396 AMAQI
10th Sep 2025407 AMAQI
10th Sep 2025318 AMAQI
10th Sep 2025289 AMAQI
10th Sep 20253410 AMAQI
10th Sep 20253111 AMAQI
10th Sep 20253612 PMAQI
10th Sep 2025381 PMAQI
10th Sep 2025362 PMAQI
10th Sep 2025323 PMAQI
10th Sep 2025324 PMAQI
10th Sep 2025295 PMAQI
10th Sep 2025296 PMAQI
10th Sep 2025357 PMAQI
10th Sep 2025378 PMAQI
10th Sep 2025409 PMAQI
10th Sep 20253610 PMAQI
10th Sep 20253411 PMAQI
11th Sep 20253812 AMAQI
11th Sep 2025421 AMAQI
11th Sep 2025412 AMAQI
11th Sep 2025403 AMAQI
11th Sep 2025404 AMAQI
11th Sep 2025405 AMAQI

27°C26/30°C

11th Sep 2025406 AMAQI
11th Sep 2025407 AMAQI
11th Sep 2025208 AMAQI
11th Sep 2025249 AMAQI
11th Sep 20252410 AMAQI
11th Sep 20253411 AMAQI
11th Sep 20252412 PMAQI
11th Sep 2025321 PMAQI
11th Sep 2025282 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025264 PMAQI
11th Sep 2025285 PMAQI
11th Sep 2025266 PMAQI
11th Sep 2025327 PMAQI
11th Sep 2025328 PMAQI
11th Sep 2025359 PMAQI
11th Sep 20253210 PMAQI
11th Sep 20253311 PMAQI
12th Sep 20253412 AMAQI
12th Sep 2025421 AMAQI
12th Sep 2025412 AMAQI
12th Sep 2025373 AMAQI
12th Sep 2025384 AMAQI
12th Sep 2025375 AMAQI

28°C26/32°C

12th Sep 2025376 AMAQI
12th Sep 2025397 AMAQI
12th Sep 2025268 AMAQI
12th Sep 2025349 AMAQI
12th Sep 20251910 AMAQI
12th Sep 20253011 AMAQI
12th Sep 20252312 PMAQI
12th Sep 2025261 PMAQI
12th Sep 2025242 PMAQI
12th Sep 2025193 PMAQI
12th Sep 2025224 PMAQI
12th Sep 2025265 PMAQI
12th Sep 2025346 PMAQI
12th Sep 2025267 PMAQI
12th Sep 2025308 PMAQI
12th Sep 2025319 PMAQI
12th Sep 20253410 PMAQI
12th Sep 20253211 PMAQI
13th Sep 20253612 AMAQI
13th Sep 2025401 AMAQI
13th Sep 2025382 AMAQI
13th Sep 2025373 AMAQI
13th Sep 2025364 AMAQI
13th Sep 2025365 AMAQI

28°C25/30°C

13th Sep 2025366 AMAQI
13th Sep 2025357 AMAQI
13th Sep 2025298 AMAQI
13th Sep 2025329 AMAQI
13th Sep 20252610 AMAQI
13th Sep 20253411 AMAQI
13th Sep 20252312 PMAQI
13th Sep 2025271 PMAQI
13th Sep 2025282 PMAQI
13th Sep 2025263 PMAQI
13th Sep 2025224 PMAQI
13th Sep 2025325 PMAQI
13th Sep 2025206 PMAQI
13th Sep 2025277 PMAQI
13th Sep 2025308 PMAQI
13th Sep 2025359 PMAQI
13th Sep 20253110 PMAQI
13th Sep 20253111 PMAQI
14th Sep 20252912 AMAQI
14th Sep 2025361 AMAQI
14th Sep 2025352 AMAQI
14th Sep 2025343 AMAQI
14th Sep 2025364 AMAQI
14th Sep 2025355 AMAQI

28°C26/30°C

14th Sep 2025366 AMAQI
14th Sep 2025367 AMAQI
14th Sep 2025278 AMAQI
14th Sep 2025259 AMAQI
14th Sep 20252310 AMAQI
14th Sep 20252311 AMAQI
14th Sep 20252612 PMAQI
14th Sep 2025241 PMAQI
14th Sep 2025282 PMAQI
14th Sep 2025243 PMAQI
14th Sep 2025214 PMAQI
14th Sep 2025265 PMAQI
14th Sep 2025266 PMAQI
14th Sep 2025277 PMAQI
14th Sep 2025308 PMAQI
14th Sep 2025379 PMAQI
14th Sep 20253510 PMAQI
14th Sep 20253211 PMAQI
15th Sep 20253312 AMAQI
15th Sep 2025361 AMAQI
15th Sep 2025372 AMAQI
15th Sep 2025333 AMAQI
15th Sep 2025324 AMAQI
15th Sep 2025345 AMAQI

28°C25/31°C

15th Sep 2025326 AMAQI
15th Sep 2025337 AMAQI
15th Sep 2025328 AMAQI
15th Sep 2025409 AMAQI
15th Sep 20253210 AMAQI
15th Sep 20253511 AMAQI
15th Sep 20252412 PMAQI
15th Sep 2025291 PMAQI
15th Sep 2025292 PMAQI
15th Sep 2025213 PMAQI
15th Sep 2025224 PMAQI
15th Sep 2025195 PMAQI
15th Sep 2025176 PMAQI
15th Sep 2025227 PMAQI
15th Sep 2025298 PMAQI
15th Sep 2025279 PMAQI
15th Sep 20253210 PMAQI
15th Sep 20253111 PMAQI
16th Sep 20252812 AMAQI
16th Sep 2025321 AMAQI
16th Sep 2025352 AMAQI
16th Sep 2025343 AMAQI
16th Sep 2025344 AMAQI
16th Sep 2025345 AMAQI

28°C25/31°C

16th Sep 2025346 AMAQI
16th Sep 2025347 AMAQI
16th Sep 2025248 AMAQI
16th Sep 2025259 AMAQI
16th Sep 20253010 AMAQI
16th Sep 20252711 AMAQI
16th Sep 20253212 PMAQI
16th Sep 2025311 PMAQI
16th Sep 2025292 PMAQI
16th Sep 2025243 PMAQI
16th Sep 2025204 PMAQI
16th Sep 2025225 PMAQI
16th Sep 2025256 PMAQI
16th Sep 2025277 PMAQI
16th Sep 2025308 PMAQI
16th Sep 2025299 PMAQI
16th Sep 20252610 PMAQI
16th Sep 20252611 PMAQI
17th Sep 20252812 AMAQI
17th Sep 2025321 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025333 AMAQI
17th Sep 2025324 AMAQI
17th Sep 2025325 AMAQI

27°C26/30°C

17th Sep 2025326 AMAQI
17th Sep 2025327 AMAQI
17th Sep 2025248 AMAQI
17th Sep 2025229 AMAQI
17th Sep 20252210 AMAQI
17th Sep 20252211 AMAQI
17th Sep 20252412 PMAQI
17th Sep 2025201 PMAQI
17th Sep 2025222 PMAQI
17th Sep 2025173 PMAQI
17th Sep 2025204 PMAQI
17th Sep 2025325 PMAQI
17th Sep 2025336 PMAQI
17th Sep 2025327 PMAQI
17th Sep 2025328 PMAQI
17th Sep 2025329 PMAQI
17th Sep 20253210 PMAQI
17th Sep 20253211 PMAQI
18th Sep 20253212 AMAQI
18th Sep 2025331 AMAQI
18th Sep 2025342 AMAQI
18th Sep 2025333 AMAQI
18th Sep 2025324 AMAQI
18th Sep 2025325 AMAQI

28°C26/31°C

18th Sep 2025316 AMAQI
18th Sep 2025317 AMAQI
18th Sep 2025228 AMAQI
18th Sep 2025269 AMAQI
18th Sep 20252610 AMAQI
18th Sep 20252211 AMAQI
18th Sep 20253212 PMAQI
18th Sep 2025351 PMAQI
18th Sep 2025382 PMAQI
18th Sep 2025223 PMAQI
18th Sep 2025304 PMAQI
18th Sep 2025195 PMAQI
18th Sep 2025216 PMAQI
18th Sep 2025287 PMAQI
18th Sep 2025348 PMAQI
18th Sep 2025399 PMAQI
18th Sep 20253510 PMAQI
18th Sep 20253511 PMAQI
19th Sep 20253412 AMAQI
19th Sep 2025311 AMAQI
19th Sep 2025322 AMAQI
19th Sep 2025323 AMAQI
19th Sep 2025314 AMAQI
19th Sep 2025315 AMAQI

28°C26/29°C

19th Sep 2025316 AMAQI
19th Sep 2025317 AMAQI
19th Sep 2025378 AMAQI
19th Sep 2025469 AMAQI
19th Sep 20254010 AMAQI
19th Sep 20253811 AMAQI
19th Sep 20252812 PMAQI
19th Sep 2025291 PMAQI
19th Sep 2025262 PMAQI
19th Sep 2025253 PMAQI
19th Sep 2025244 PMAQI
19th Sep 2025245 PMAQI
19th Sep 2025246 PMAQI
19th Sep 2025267 PMAQI
19th Sep 2025328 PMAQI
19th Sep 2025379 PMAQI
19th Sep 20253810 PMAQI
19th Sep 20254111 PMAQI
20th Sep 20254612 AMAQI
20th Sep 2025351 AMAQI
20th Sep 2025322 AMAQI
20th Sep 2025343 AMAQI
20th Sep 2025354 AMAQI
20th Sep 2025345 AMAQI

28°C26/31°C

20th Sep 2025346 AMAQI
20th Sep 2025337 AMAQI
20th Sep 2025328 AMAQI
20th Sep 2025349 AMAQI
20th Sep 20253610 AMAQI
20th Sep 20253211 AMAQI
20th Sep 20254212 PMAQI
20th Sep 2025411 PMAQI
20th Sep 2025452 PMAQI
20th Sep 2025433 PMAQI
20th Sep 2025404 PMAQI
20th Sep 2025395 PMAQI
20th Sep 2025386 PMAQI
20th Sep 2025427 PMAQI
20th Sep 2025428 PMAQI
20th Sep 2025529 PMAQI
20th Sep 20255610 PMAQI
20th Sep 20255711 PMAQI
21st Sep 20255212 AMAQI
21st Sep 2025381 AMAQI
21st Sep 2025372 AMAQI
21st Sep 2025373 AMAQI
21st Sep 2025374 AMAQI
21st Sep 2025375 AMAQI

28°C26/30°C

21st Sep 2025366 AMAQI
21st Sep 2025367 AMAQI
21st Sep 2025368 AMAQI
21st Sep 2025439 AMAQI
21st Sep 20254410 AMAQI
21st Sep 20254611 AMAQI
21st Sep 20254812 PMAQI
21st Sep 2025531 PMAQI
21st Sep 2025502 PMAQI
21st Sep 2025503 PMAQI
21st Sep 2025474 PMAQI
21st Sep 2025545 PMAQI
21st Sep 2025536 PMAQI
21st Sep 2025527 PMAQI
21st Sep 2025448 PMAQI
21st Sep 2025429 PMAQI
21st Sep 20254210 PMAQI
21st Sep 20254111 PMAQI
22nd Sep 20253912 AMAQI
22nd Sep 2025381 AMAQI
22nd Sep 2025382 AMAQI
22nd Sep 2025393 AMAQI
22nd Sep 2025404 AMAQI
22nd Sep 2025405 AMAQI

28°C26/31°C

22nd Sep 2025416 AMAQI
6 AM
22nd Sep 2025417 AMAQI
22nd Sep 2025268 AMAQI
22nd Sep 2025229 AMAQI
22nd Sep 20252310 AMAQI
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

38AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
4 PM

29AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 38), while the lowest AQI was between 4 PM to 4 PM (Avg. 29).
Night time
Avg. Highest Time
12 AM - 5 AM

38AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
7 PM

33AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 38), while the lowest AQI was between 7 PM to 7 PM (Avg. 33).

2025 Days Vs Air Quality

Hainan Normal University, Haikou, Hainan, China

2025

45%

119

50%

133

5%

12

Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)

Good
119 Days
Moderate
133 Days
Poor
12 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 45%

Health Risk Level:

Significant

In 2025, 45% of 265 days were within WHO’s safe air quality limits, and 55% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Hainan Normal University, Haikou, Hainan, China

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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
110AQI
2nd January 2025
104AQI
3rd January 2025
102AQI
4th January 2025
92AQI
5th January 2025
112AQI
6th January 2025
121AQI
7th January 2025
93AQI
8th January 2025
92AQI
9th January 2025
121AQI
10th January 2025
103AQI
11th January 2025
90AQI
12th January 2025
77AQI
13th January 2025
76AQI
14th January 2025
73AQI
15th January 2025
77AQI
16th January 2025
92AQI
17th January 2025
93AQI
18th January 2025
85AQI
19th January 2025
89AQI
20th January 2025
96AQI
21st January 2025
76AQI
22nd January 2025
91AQI
23rd January 2025
83AQI
24th January 2025
70AQI
25th January 2025
64AQI
26th January 2025
58AQI
27th January 2025
58AQI
28th January 2025
60AQI
29th January 2025
75AQI
30th January 2025
69AQI
31st January 2025
71AQI
1st February 2025
58AQI
2nd February 2025
49AQI
3rd February 2025
65AQI
4th February 2025
53AQI
5th February 2025
59AQI
6th February 2025
61AQI
7th February 2025
69AQI
8th February 2025
58AQI
9th February 2025
68AQI
10th February 2025
62AQI
11th February 2025
61AQI
12th February 2025
56AQI
13th February 2025
69AQI
14th February 2025
51AQI
15th February 2025
72AQI
16th February 2025
48AQI
17th February 2025
71AQI
18th February 2025
77AQI
19th February 2025
72AQI
20th February 2025
68AQI
21st February 2025
64AQI
22nd February 2025
49AQI
23rd February 2025
69AQI
24th February 2025
51AQI
25th February 2025
68AQI
26th February 2025
79AQI
27th February 2025
70AQI
28th February 2025
64AQI
1st March 2025
60AQI
2nd March 2025
56AQI
3rd March 2025
64AQI
4th March 2025
55AQI
5th March 2025
54AQI
6th March 2025
33AQI
7th March 2025
44AQI
8th March 2025
51AQI
9th March 2025
62AQI
10th March 2025
67AQI
11th March 2025
65AQI
12th March 2025
61AQI
13th March 2025
57AQI
14th March 2025
48AQI
15th March 2025
59AQI
16th March 2025
42AQI
17th March 2025
69AQI
18th March 2025
67AQI
19th March 2025
83AQI
20th March 2025
81AQI
21st March 2025
81AQI
22nd March 2025
76AQI
23rd March 2025
70AQI
24th March 2025
75AQI
25th March 2025
75AQI
26th March 2025
73AQI
27th March 2025
69AQI
28th March 2025
67AQI
29th March 2025
52AQI
30th March 2025
37AQI
31st March 2025
52AQI
1st April 2025
56AQI
2nd April 2025
69AQI
3rd April 2025
57AQI
4th April 2025
62AQI
5th April 2025
67AQI
6th April 2025
72AQI
7th April 2025
74AQI
8th April 2025
66AQI
9th April 2025
67AQI
10th April 2025
76AQI
11th April 2025
63AQI
12th April 2025
70AQI
13th April 2025
132AQI
14th April 2025
134AQI
15th April 2025
147AQI
16th April 2025
137AQI
17th April 2025
115AQI
18th April 2025
94AQI
19th April 2025
84AQI
20th April 2025
67AQI
21st April 2025
65AQI
22nd April 2025
66AQI
23rd April 2025
62AQI
24th April 2025
64AQI
25th April 2025
58AQI
26th April 2025
53AQI
27th April 2025
45AQI
28th April 2025
59AQI
29th April 2025
62AQI
30th April 2025
61AQI
1st May 2025
52AQI
2nd May 2025
59AQI
3rd May 2025
60AQI
4th May 2025
59AQI
5th May 2025
56AQI
6th May 2025
59AQI
7th May 2025
56AQI
8th May 2025
53AQI
9th May 2025
55AQI
10th May 2025
50AQI
11th May 2025
59AQI
12th May 2025
62AQI
13th May 2025
58AQI
14th May 2025
48AQI
15th May 2025
41AQI
16th May 2025
38AQI
17th May 2025
40AQI
18th May 2025
45AQI
19th May 2025
44AQI
20th May 2025
50AQI
21st May 2025
48AQI
22nd May 2025
45AQI
23rd May 2025
41AQI
24th May 2025
38AQI
25th May 2025
57AQI
26th May 2025
67AQI
27th May 2025
58AQI
28th May 2025
50AQI
29th May 2025
45AQI
30th May 2025
43AQI
31st May 2025
41AQI
1st June 2025
48AQI
2nd June 2025
43AQI
3rd June 2025
55AQI
4th June 2025
55AQI
5th June 2025
42AQI
6th June 2025
42AQI
7th June 2025
45AQI
8th June 2025
49AQI
9th June 2025
49AQI
10th June 2025
48AQI
11th June 2025
45AQI
12th June 2025
37AQI
13th June 2025
33AQI
14th June 2025
35AQI
15th June 2025
42AQI
16th June 2025
46AQI
17th June 2025
50AQI
18th June 2025
49AQI
19th June 2025
47AQI
20th June 2025
46AQI
21st June 2025
42AQI
22nd June 2025
37AQI
23rd June 2025
35AQI
24th June 2025
35AQI
25th June 2025
34AQI
26th June 2025
31AQI
27th June 2025
31AQI
28th June 2025
33AQI
29th June 2025
35AQI
30th June 2025
35AQI
1st July 2025
33AQI
2nd July 2025
30AQI
3rd July 2025
31AQI
4th July 2025
32AQI
5th July 2025
35AQI
6th July 2025
37AQI
7th July 2025
35AQI
8th July 2025
42AQI
9th July 2025
47AQI
10th July 2025
49AQI
11th July 2025
50AQI
12th July 2025
50AQI
13th July 2025
53AQI
14th July 2025
54AQI
15th July 2025
55AQI
16th July 2025
56AQI
17th July 2025
57AQI
18th July 2025
55AQI
19th July 2025
51AQI
20th July 2025
48AQI
21st July 2025
45AQI
22nd July 2025
45AQI
23rd July 2025
48AQI
24th July 2025
45AQI
25th July 2025
46AQI
26th July 2025
45AQI
27th July 2025
48AQI
28th July 2025
44AQI
29th July 2025
46AQI
30th July 2025
43AQI
31st July 2025
45AQI
1st August 2025
53AQI
2nd August 2025
54AQI
3rd August 2025
54AQI
4th August 2025
55AQI
5th August 2025
53AQI
6th August 2025
53AQI
7th August 2025
54AQI
8th August 2025
53AQI
9th August 2025
55AQI
10th August 2025
53AQI
11th August 2025
49AQI
12th August 2025
47AQI
13th August 2025
46AQI
14th August 2025
48AQI
15th August 2025
36AQI
16th August 2025
32AQI
17th August 2025
31AQI
18th August 2025
29AQI
19th August 2025
33AQI
20th August 2025
36AQI
21st August 2025
38AQI
22nd August 2025
35AQI
23rd August 2025
36AQI
24th August 2025
39AQI
25th August 2025
32AQI
26th August 2025
32AQI
27th August 2025
37AQI
28th August 2025
41AQI
29th August 2025
41AQI
30th August 2025
39AQI
31st August 2025
37AQI
1st September 2025
36AQI
2nd September 2025
35AQI
3rd September 2025
34AQI
4th September 2025
32AQI
5th September 2025
34AQI
6th September 2025
28AQI
7th September 2025
44AQI
8th September 2025
43AQI
9th September 2025
36AQI
10th September 2025
38AQI
11th September 2025
33AQI
12th September 2025
31AQI
13th September 2025
32AQI
14th September 2025
30AQI
15th September 2025
29AQI
16th September 2025
29AQI
17th September 2025
29AQI
18th September 2025
30AQI
19th September 2025
32AQI
20th September 2025
40AQI
21st September 2025
41AQI
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

86AQI

63AQI

61AQI

77AQI

51AQI

42AQI

45AQI

43AQI

34AQI

No. of days

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

202557AQI

24
7
3
25
5
26
1
24
5
16
15
28
2
24
7
21
10
21
119
133
12

Highest AQI recorded in

January

86AQI

Lowest AQI recorded in

September

34AQI

202457AQI

6
24
1
9
18
2
4
27
3
27
19
12
29
1
29
2
24
7
24
6
7
21
3
5
23
2
26
5
159
194
13

Highest AQI recorded in

December

83AQI

Lowest AQI recorded in

July

28AQI

202355AQI

8
21
2
10
16
2
6
25
4
26
16
15
26
4
27
3
1
21
10
25
5
10
20
1
8
16
2
7
22
2
168
183
10

Highest AQI recorded in

December

73AQI

Lowest AQI recorded in

September

37AQI

202249AQI

13
16
1
16
5
16
15
14
16
28
3
28
2
20
1
1
7
21
12
19
24
6
6
23
2
184
128
3

Highest AQI recorded in

December

66AQI

Lowest AQI recorded in

July

31AQI

202149AQI

24
7
9
19
15
15
1
23
7
27
4
20
10
30
1
29
2
26
4
23
8
12
17
1
1
29
1
215
140
10

Highest AQI recorded in

January

86AQI

Lowest AQI recorded in

July

32AQI

202048AQI

8
5
10
11
11
7
30
31
25
6
27
3
8
23
8
19
3
20
11
158
94
14

Highest AQI recorded in

December

85AQI

Lowest AQI recorded in

June

31AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2024(Avg.)
57AQI
Least Polluted Year Recorded
2020(Avg.)
48AQI

Hainan Normal University's annual 2025 AQI (57) shows an average percentage change of 9.8% (worsened AQI) compared to previous years: 2020 (48), 2021 (49), 2022 (49), 2023 (55), 2024 (57).