Hainan 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 University, Haikou, Hainan, China
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Sep 2022
121AQILowest AQI recorded on
8th Sep 2021
11AQISame Day Analysis (20th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 37 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Hainan University, Haikou, Hainan, China
AQI
Day
Night
.
6 AM20th Sep 2025
6 PM
5 AM21st Sep 2025
Day time
Avg. Highest Time
3PM20th Sep
47AQI
Avg. Lowest Time
12PM20th Sep
32AQI
Night time
Avg. Highest Time
11PM20th Sep
56AQI
Avg. Lowest Time
5AM21st Sep
36AQI
In the last 24 hours,
Hainan University's AQI reached its highest point of 56 at 11 PM during the Night, while the lowest point, 32, was recorded at 12 PM during the Day between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Hainan University, Haikou, Hainan, China
AugSep
22nd - 23rd23rd - 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
Day
Night
22nd Aug 2025386 AMAQI
22nd Aug 2025387 AMAQI
22nd Aug 2025488 AMAQI
22nd Aug 2025319 AMAQI
22nd Aug 20255010 AMAQI
22nd Aug 20254211 AMAQI
22nd Aug 20254012 PMAQI
22nd Aug 2025361 PMAQI
22nd Aug 2025372 PMAQI
22nd Aug 2025323 PMAQI
22nd Aug 2025294 PMAQI
22nd Aug 2025435 PMAQI
22nd Aug 2025316 PMAQI
22nd Aug 2025427 PMAQI
22nd Aug 2025388 PMAQI
22nd Aug 2025479 PMAQI
22nd Aug 20254210 PMAQI
22nd Aug 20254111 PMAQI
23rd Aug 20254012 AMAQI
23rd Aug 2025381 AMAQI
23rd Aug 2025382 AMAQI
23rd Aug 2025383 AMAQI
23rd Aug 2025384 AMAQI
23rd Aug 2025375 AMAQI
29°C26/32°C
23rd Aug 2025386 AMAQI
23rd Aug 2025387 AMAQI
23rd Aug 2025418 AMAQI
23rd Aug 2025479 AMAQI
23rd Aug 20253610 AMAQI
23rd Aug 20254711 AMAQI
23rd Aug 20254712 PMAQI
23rd Aug 2025391 PMAQI
23rd Aug 2025382 PMAQI
23rd Aug 2025333 PMAQI
23rd Aug 2025324 PMAQI
23rd Aug 2025385 PMAQI
23rd Aug 2025406 PMAQI
23rd Aug 2025387 PMAQI
23rd Aug 2025378 PMAQI
23rd Aug 2025449 PMAQI
23rd Aug 20254310 PMAQI
23rd Aug 20254111 PMAQI
24th Aug 20254212 AMAQI
24th Aug 2025431 AMAQI
24th Aug 2025422 AMAQI
24th Aug 2025433 AMAQI
24th Aug 2025474 AMAQI
24th Aug 2025435 AMAQI
28°C26/31°C
24th Aug 2025446 AMAQI
24th Aug 2025437 AMAQI
24th Aug 2025478 AMAQI
24th Aug 2025479 AMAQI
24th Aug 20253310 AMAQI
24th Aug 20253411 AMAQI
24th Aug 20254812 PMAQI
24th Aug 2025441 PMAQI
24th Aug 2025422 PMAQI
24th Aug 2025483 PMAQI
24th Aug 2025464 PMAQI
24th Aug 2025405 PMAQI
24th Aug 2025486 PMAQI
24th Aug 2025487 PMAQI
24th Aug 2025458 PMAQI
24th Aug 2025419 PMAQI
24th Aug 20254210 PMAQI
24th Aug 20254311 PMAQI
25th Aug 20254712 AMAQI
25th Aug 2025441 AMAQI
25th Aug 2025432 AMAQI
25th Aug 2025443 AMAQI
25th Aug 2025454 AMAQI
25th Aug 2025455 AMAQI
27°C26/28°C
25th Aug 2025466 AMAQI
25th Aug 2025447 AMAQI
25th Aug 2025338 AMAQI
25th Aug 2025409 AMAQI
25th Aug 20253810 AMAQI
25th Aug 20252711 AMAQI
25th Aug 20253312 PMAQI
25th Aug 2025341 PMAQI
25th Aug 2025342 PMAQI
25th Aug 2025303 PMAQI
25th Aug 2025244 PMAQI
25th Aug 2025285 PMAQI
25th Aug 2025346 PMAQI
25th Aug 2025377 PMAQI
25th Aug 2025458 PMAQI
25th Aug 2025449 PMAQI
25th Aug 20254110 PMAQI
25th Aug 20253911 PMAQI
26th Aug 20254112 AMAQI
26th Aug 2025401 AMAQI
26th Aug 2025432 AMAQI
26th Aug 2025423 AMAQI
26th Aug 2025404 AMAQI
26th Aug 2025405 AMAQI
26°C25/27°C
26th Aug 2025416 AMAQI
26th Aug 2025417 AMAQI
26th Aug 2025408 AMAQI
26th Aug 2025399 AMAQI
26th Aug 20253710 AMAQI
26th Aug 20253611 AMAQI
26th Aug 20254112 PMAQI
26th Aug 2025341 PMAQI
26th Aug 2025382 PMAQI
26th Aug 2025303 PMAQI
26th Aug 2025344 PMAQI
26th Aug 2025285 PMAQI
26th Aug 2025326 PMAQI
26th Aug 2025307 PMAQI
26th Aug 2025358 PMAQI
26th Aug 2025319 PMAQI
26th Aug 20253910 PMAQI
26th Aug 20253611 PMAQI
27th Aug 20254312 AMAQI
27th Aug 2025441 AMAQI
27th Aug 2025462 AMAQI
27th Aug 2025443 AMAQI
27th Aug 2025424 AMAQI
27th Aug 2025445 AMAQI
27°C26/30°C
27th Aug 2025426 AMAQI
27th Aug 2025447 AMAQI
27th Aug 2025538 AMAQI
27th Aug 2025529 AMAQI
27th Aug 20254310 AMAQI
27th Aug 20255111 AMAQI
27th Aug 20255012 PMAQI
27th Aug 2025381 PMAQI
27th Aug 2025462 PMAQI
27th Aug 2025503 PMAQI
27th Aug 2025444 PMAQI
27th Aug 2025525 PMAQI
27th Aug 2025386 PMAQI
27th Aug 2025387 PMAQI
27th Aug 2025438 PMAQI
27th Aug 2025499 PMAQI
27th Aug 20254210 PMAQI
27th Aug 20254111 PMAQI
28th Aug 20254612 AMAQI
28th Aug 2025441 AMAQI
28th Aug 2025432 AMAQI
28th Aug 2025513 AMAQI
28th Aug 2025514 AMAQI
28th Aug 2025455 AMAQI
27°C26/30°C
28th Aug 2025496 AMAQI
28th Aug 2025497 AMAQI
28th Aug 2025448 AMAQI
28th Aug 2025449 AMAQI
28th Aug 20255710 AMAQI
28th Aug 20253711 AMAQI
28th Aug 20254412 PMAQI
28th Aug 2025481 PMAQI
28th Aug 2025442 PMAQI
28th Aug 2025493 PMAQI
28th Aug 2025574 PMAQI
28th Aug 2025615 PMAQI
28th Aug 2025606 PMAQI
28th Aug 2025467 PMAQI
28th Aug 2025368 PMAQI
28th Aug 2025409 PMAQI
28th Aug 20255010 PMAQI
28th Aug 20254811 PMAQI
29th Aug 20254912 AMAQI
29th Aug 2025511 AMAQI
29th Aug 2025502 AMAQI
29th Aug 2025503 AMAQI
29th Aug 2025494 AMAQI
29th Aug 2025505 AMAQI
27°C25/30°C
29th Aug 2025496 AMAQI
29th Aug 2025507 AMAQI
29th Aug 2025518 AMAQI
29th Aug 2025519 AMAQI
29th Aug 20254510 AMAQI
29th Aug 20255411 AMAQI
29th Aug 20255212 PMAQI
29th Aug 2025521 PMAQI
29th Aug 2025502 PMAQI
29th Aug 2025403 PMAQI
29th Aug 2025494 PMAQI
29th Aug 2025515 PMAQI
29th Aug 2025506 PMAQI
29th Aug 2025487 PMAQI
29th Aug 2025478 PMAQI
29th Aug 2025439 PMAQI
29th Aug 20254810 PMAQI
29th Aug 20255511 PMAQI
30th Aug 20254712 AMAQI
30th Aug 2025481 AMAQI
30th Aug 2025502 AMAQI
30th Aug 2025503 AMAQI
30th Aug 2025504 AMAQI
30th Aug 2025515 AMAQI
27°C26/28°C
30th Aug 2025486 AMAQI
30th Aug 2025507 AMAQI
30th Aug 2025488 AMAQI
30th Aug 2025429 AMAQI
30th Aug 20253610 AMAQI
30th Aug 20255111 AMAQI
30th Aug 20254512 PMAQI
30th Aug 2025381 PMAQI
30th Aug 2025382 PMAQI
30th Aug 2025383 PMAQI
30th Aug 2025394 PMAQI
30th Aug 2025375 PMAQI
30th Aug 2025326 PMAQI
30th Aug 2025387 PMAQI
30th Aug 2025408 PMAQI
30th Aug 2025479 PMAQI
30th Aug 20254710 PMAQI
30th Aug 20255211 PMAQI
31st Aug 20255012 AMAQI
31st Aug 2025461 AMAQI
31st Aug 2025502 AMAQI
31st Aug 2025473 AMAQI
31st Aug 2025454 AMAQI
31st Aug 2025485 AMAQI
27°C26/28°C
31st Aug 2025466 AMAQI
31st Aug 2025447 AMAQI
31st Aug 2025338 AMAQI
31st Aug 2025399 AMAQI
31st Aug 20252710 AMAQI
31st Aug 20252911 AMAQI
31st Aug 20253512 PMAQI
31st Aug 2025431 PMAQI
31st Aug 2025422 PMAQI
31st Aug 2025373 PMAQI
31st Aug 2025374 PMAQI
31st Aug 2025355 PMAQI
31st Aug 2025406 PMAQI
31st Aug 2025397 PMAQI
31st Aug 2025388 PMAQI
31st Aug 2025439 PMAQI
31st Aug 20255110 PMAQI
31st Aug 20255311 PMAQI
1st Sep 20254612 AMAQI
1st Sep 2025421 AMAQI
1st Sep 2025502 AMAQI
1st Sep 2025473 AMAQI
1st Sep 2025444 AMAQI
1st Sep 2025465 AMAQI
27°C26/29°C
1st Sep 2025486 AMAQI
1st Sep 2025507 AMAQI
1st Sep 2025448 AMAQI
1st Sep 2025419 AMAQI
1st Sep 20254810 AMAQI
1st Sep 20254411 AMAQI
1st Sep 20254112 PMAQI
1st Sep 2025371 PMAQI
1st Sep 2025312 PMAQI
1st Sep 2025323 PMAQI
1st Sep 2025264 PMAQI
1st Sep 2025335 PMAQI
1st Sep 2025336 PMAQI
1st Sep 2025417 PMAQI
1st Sep 2025448 PMAQI
1st Sep 2025369 PMAQI
1st Sep 20254210 PMAQI
1st Sep 20254611 PMAQI
2nd Sep 20254412 AMAQI
2nd Sep 2025441 AMAQI
2nd Sep 2025432 AMAQI
2nd Sep 2025443 AMAQI
2nd Sep 2025424 AMAQI
2nd Sep 2025435 AMAQI
27°C26/30°C
2nd Sep 2025436 AMAQI
2nd Sep 2025467 AMAQI
2nd Sep 2025478 AMAQI
2nd Sep 2025439 AMAQI
2nd Sep 20253610 AMAQI
2nd Sep 20253111 AMAQI
2nd Sep 20253312 PMAQI
2nd Sep 2025321 PMAQI
2nd Sep 2025292 PMAQI
2nd Sep 2025273 PMAQI
2nd Sep 2025294 PMAQI
2nd Sep 2025275 PMAQI
2nd Sep 2025266 PMAQI
2nd Sep 2025387 PMAQI
2nd Sep 2025418 PMAQI
2nd Sep 2025429 PMAQI
2nd Sep 20254010 PMAQI
2nd Sep 20254711 PMAQI
3rd Sep 20253812 AMAQI
3rd Sep 2025421 AMAQI
3rd Sep 2025492 AMAQI
3rd Sep 2025483 AMAQI
3rd Sep 2025424 AMAQI
3rd Sep 2025435 AMAQI
28°C26/30°C
3rd Sep 2025426 AMAQI
3rd Sep 2025447 AMAQI
3rd Sep 2025288 AMAQI
3rd Sep 2025439 AMAQI
3rd Sep 20252810 AMAQI
3rd Sep 20253411 AMAQI
3rd Sep 20253412 PMAQI
3rd Sep 2025331 PMAQI
3rd Sep 2025372 PMAQI
3rd Sep 2025333 PMAQI
3rd Sep 2025344 PMAQI
3rd Sep 2025285 PMAQI
3rd Sep 2025286 PMAQI
3rd Sep 2025387 PMAQI
3rd Sep 2025438 PMAQI
3rd Sep 2025449 PMAQI
3rd Sep 20253610 PMAQI
3rd Sep 20253711 PMAQI
4th Sep 20253712 AMAQI
4th Sep 2025411 AMAQI
4th Sep 2025422 AMAQI
4th Sep 2025413 AMAQI
4th Sep 2025424 AMAQI
4th Sep 2025415 AMAQI
28°C26/30°C
4th Sep 2025406 AMAQI
4th Sep 2025417 AMAQI
4th Sep 2025368 AMAQI
4th Sep 2025519 AMAQI
4th Sep 20254810 AMAQI
4th Sep 20254511 AMAQI
4th Sep 20253412 PMAQI
4th Sep 2025281 PMAQI
4th Sep 2025262 PMAQI
4th Sep 2025183 PMAQI
4th Sep 2025204 PMAQI
4th Sep 2025245 PMAQI
4th Sep 2025286 PMAQI
4th Sep 2025287 PMAQI
4th Sep 2025288 PMAQI
4th Sep 2025289 PMAQI
4th Sep 20252810 PMAQI
4th Sep 20253011 PMAQI
5th Sep 20253312 AMAQI
5th Sep 2025381 AMAQI
5th Sep 2025392 AMAQI
5th Sep 2025383 AMAQI
5th Sep 2025384 AMAQI
5th Sep 2025455 AMAQI
28°C26/30°C
5th Sep 2025406 AMAQI
5th Sep 2025397 AMAQI
5th Sep 2025368 AMAQI
5th Sep 2025389 AMAQI
5th Sep 20254410 AMAQI
5th Sep 20253511 AMAQI
5th Sep 20253112 PMAQI
5th Sep 2025311 PMAQI
5th Sep 2025392 PMAQI
5th Sep 2025303 PMAQI
5th Sep 2025384 PMAQI
5th Sep 2025305 PMAQI
5th Sep 2025266 PMAQI
5th Sep 2025297 PMAQI
5th Sep 2025358 PMAQI
5th Sep 2025309 PMAQI
5th Sep 20253610 PMAQI
5th Sep 20252911 PMAQI
6th Sep 20252812 AMAQI
6th Sep 2025331 AMAQI
6th Sep 2025292 AMAQI
6th Sep 2025323 AMAQI
6th Sep 2025344 AMAQI
6th Sep 2025365 AMAQI
28°C26/30°C
6th Sep 2025376 AMAQI
6th Sep 2025347 AMAQI
6th Sep 2025218 AMAQI
6th Sep 2025289 AMAQI
6th Sep 20252210 AMAQI
6th Sep 20252011 AMAQI
6th Sep 20252912 PMAQI
6th Sep 2025221 PMAQI
6th Sep 2025282 PMAQI
6th Sep 2025313 PMAQI
6th Sep 2025204 PMAQI
6th Sep 2025295 PMAQI
6th Sep 2025396 PMAQI
6th Sep 2025317 PMAQI
6th Sep 2025288 PMAQI
6th Sep 2025349 PMAQI
6th Sep 20253410 PMAQI
6th Sep 20254011 PMAQI
7th Sep 20253612 AMAQI
7th Sep 2025321 AMAQI
7th Sep 2025332 AMAQI
7th Sep 2025373 AMAQI
7th Sep 2025344 AMAQI
7th Sep 2025315 AMAQI
28°C26/31°C
7th Sep 2025356 AMAQI
7th Sep 2025357 AMAQI
7th Sep 2025528 AMAQI
7th Sep 2025539 AMAQI
7th Sep 20255510 AMAQI
7th Sep 20255511 AMAQI
7th Sep 20254812 PMAQI
7th Sep 2025581 PMAQI
7th Sep 2025552 PMAQI
7th Sep 2025523 PMAQI
7th Sep 2025534 PMAQI
7th Sep 2025465 PMAQI
7th Sep 2025526 PMAQI
7th Sep 2025477 PMAQI
7th Sep 2025478 PMAQI
7th Sep 2025449 PMAQI
7th Sep 20254210 PMAQI
7th Sep 20254411 PMAQI
8th Sep 20253512 AMAQI
8th Sep 2025321 AMAQI
8th Sep 2025312 AMAQI
8th Sep 2025383 AMAQI
8th Sep 2025414 AMAQI
8th Sep 2025405 AMAQI
28°C26/30°C
8th Sep 2025386 AMAQI
8th Sep 2025387 AMAQI
8th Sep 2025498 AMAQI
8th Sep 2025439 AMAQI
8th Sep 20254410 AMAQI
8th Sep 20253411 AMAQI
8th Sep 20253512 PMAQI
8th Sep 2025421 PMAQI
8th Sep 2025532 PMAQI
8th Sep 2025523 PMAQI
8th Sep 2025354 PMAQI
8th Sep 2025385 PMAQI
8th Sep 2025436 PMAQI
8th Sep 2025487 PMAQI
8th Sep 2025508 PMAQI
8th Sep 2025499 PMAQI
8th Sep 20254910 PMAQI
8th Sep 20254911 PMAQI
9th Sep 20254612 AMAQI
9th Sep 2025381 AMAQI
9th Sep 2025352 AMAQI
9th Sep 2025373 AMAQI
9th Sep 2025384 AMAQI
9th Sep 2025365 AMAQI
27°C25/29°C
9th Sep 2025376 AMAQI
9th Sep 2025357 AMAQI
9th Sep 2025348 AMAQI
9th Sep 2025389 AMAQI
9th Sep 20254410 AMAQI
9th Sep 20253611 AMAQI
9th Sep 20252712 PMAQI
9th Sep 2025351 PMAQI
9th Sep 2025272 PMAQI
9th Sep 2025283 PMAQI
9th Sep 2025254 PMAQI
9th Sep 2025255 PMAQI
9th Sep 2025326 PMAQI
9th Sep 2025407 PMAQI
9th Sep 2025368 PMAQI
9th Sep 2025399 PMAQI
9th Sep 20254110 PMAQI
9th Sep 20256811 PMAQI
10th Sep 20254312 AMAQI
10th Sep 2025421 AMAQI
10th Sep 2025392 AMAQI
10th Sep 2025423 AMAQI
10th Sep 2025384 AMAQI
10th Sep 2025375 AMAQI
28°C25/32°C
10th Sep 2025386 AMAQI
10th Sep 2025387 AMAQI
10th Sep 2025298 AMAQI
10th Sep 2025249 AMAQI
10th Sep 20253210 AMAQI
10th Sep 20253811 AMAQI
10th Sep 20253412 PMAQI
10th Sep 2025371 PMAQI
10th Sep 2025422 PMAQI
10th Sep 2025293 PMAQI
10th Sep 2025284 PMAQI
10th Sep 2025295 PMAQI
10th Sep 2025276 PMAQI
10th Sep 2025347 PMAQI
10th Sep 2025348 PMAQI
10th Sep 2025379 PMAQI
10th Sep 20254110 PMAQI
10th Sep 20253611 PMAQI
11th Sep 20253512 AMAQI
11th Sep 2025401 AMAQI
11th Sep 2025422 AMAQI
11th Sep 2025403 AMAQI
11th Sep 2025384 AMAQI
11th Sep 2025395 AMAQI
27°C26/30°C
11th Sep 2025386 AMAQI
11th Sep 2025387 AMAQI
11th Sep 2025408 AMAQI
11th Sep 2025339 AMAQI
11th Sep 20253510 AMAQI
11th Sep 20254711 AMAQI
11th Sep 20253512 PMAQI
11th Sep 2025401 PMAQI
11th Sep 2025342 PMAQI
11th Sep 2025283 PMAQI
11th Sep 2025314 PMAQI
11th Sep 2025255 PMAQI
11th Sep 2025306 PMAQI
11th Sep 2025367 PMAQI
11th Sep 2025358 PMAQI
11th Sep 2025369 PMAQI
11th Sep 20253510 PMAQI
11th Sep 20253211 PMAQI
12th Sep 20253412 AMAQI
12th Sep 2025431 AMAQI
12th Sep 2025402 AMAQI
12th Sep 2025383 AMAQI
12th Sep 2025394 AMAQI
12th Sep 2025385 AMAQI
28°C26/32°C
12th Sep 2025386 AMAQI
12th Sep 2025387 AMAQI
12th Sep 2025348 AMAQI
12th Sep 2025309 AMAQI
12th Sep 20252210 AMAQI
12th Sep 20252911 AMAQI
12th Sep 20253312 PMAQI
12th Sep 2025351 PMAQI
12th Sep 2025362 PMAQI
12th Sep 2025273 PMAQI
12th Sep 2025304 PMAQI
12th Sep 2025325 PMAQI
12th Sep 2025396 PMAQI
12th Sep 2025407 PMAQI
12th Sep 2025348 PMAQI
12th Sep 2025329 PMAQI
12th Sep 20253810 PMAQI
12th Sep 20253711 PMAQI
13th Sep 20253512 AMAQI
13th Sep 2025391 AMAQI
13th Sep 2025382 AMAQI
13th Sep 2025373 AMAQI
13th Sep 2025364 AMAQI
13th Sep 2025365 AMAQI
28°C25/30°C
13th Sep 2025386 AMAQI
13th Sep 2025357 AMAQI
13th Sep 2025368 AMAQI
13th Sep 2025309 AMAQI
13th Sep 20253210 AMAQI
13th Sep 20253311 AMAQI
13th Sep 20253212 PMAQI
13th Sep 2025301 PMAQI
13th Sep 2025392 PMAQI
13th Sep 2025313 PMAQI
13th Sep 2025234 PMAQI
13th Sep 2025205 PMAQI
13th Sep 2025246 PMAQI
13th Sep 2025327 PMAQI
13th Sep 2025348 PMAQI
13th Sep 2025359 PMAQI
13th Sep 20253610 PMAQI
13th Sep 20253811 PMAQI
14th Sep 20253612 AMAQI
14th Sep 2025361 AMAQI
14th Sep 2025382 AMAQI
14th Sep 2025343 AMAQI
14th Sep 2025364 AMAQI
14th Sep 2025345 AMAQI
28°C26/30°C
14th Sep 2025356 AMAQI
14th Sep 2025367 AMAQI
14th Sep 2025358 AMAQI
14th Sep 2025309 AMAQI
14th Sep 20252510 AMAQI
14th Sep 20253611 AMAQI
14th Sep 20252912 PMAQI
14th Sep 2025271 PMAQI
14th Sep 2025302 PMAQI
14th Sep 2025263 PMAQI
14th Sep 2025224 PMAQI
14th Sep 2025225 PMAQI
14th Sep 2025286 PMAQI
14th Sep 2025287 PMAQI
14th Sep 2025338 PMAQI
14th Sep 2025389 PMAQI
14th Sep 20253710 PMAQI
14th Sep 20253711 PMAQI
15th Sep 20253412 AMAQI
15th Sep 2025361 AMAQI
15th Sep 2025352 AMAQI
15th Sep 2025323 AMAQI
15th Sep 2025324 AMAQI
15th Sep 2025345 AMAQI
28°C26/31°C
15th Sep 2025326 AMAQI
15th Sep 2025327 AMAQI
15th Sep 2025398 AMAQI
15th Sep 2025429 AMAQI
15th Sep 20253910 AMAQI
15th Sep 20253511 AMAQI
15th Sep 20252812 PMAQI
15th Sep 2025291 PMAQI
15th Sep 2025312 PMAQI
15th Sep 2025213 PMAQI
15th Sep 2025304 PMAQI
15th Sep 2025225 PMAQI
15th Sep 2025246 PMAQI
15th Sep 2025267 PMAQI
15th Sep 2025308 PMAQI
15th Sep 2025329 PMAQI
15th Sep 20253410 PMAQI
15th Sep 20253211 PMAQI
16th Sep 20252812 AMAQI
16th Sep 2025311 AMAQI
16th Sep 2025342 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 2025258 AMAQI
16th Sep 2025289 AMAQI
16th Sep 20253210 AMAQI
16th Sep 20253211 AMAQI
16th Sep 20253112 PMAQI
16th Sep 2025281 PMAQI
16th Sep 2025282 PMAQI
16th Sep 2025243 PMAQI
16th Sep 2025244 PMAQI
16th Sep 2025255 PMAQI
16th Sep 2025246 PMAQI
16th Sep 2025287 PMAQI
16th Sep 2025298 PMAQI
16th Sep 2025329 PMAQI
16th Sep 20253010 PMAQI
16th Sep 20252811 PMAQI
17th Sep 20253112 AMAQI
17th Sep 2025321 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025333 AMAQI
17th Sep 2025334 AMAQI
17th Sep 2025325 AMAQI
27°C26/30°C
17th Sep 2025326 AMAQI
17th Sep 2025327 AMAQI
17th Sep 2025268 AMAQI
17th Sep 2025309 AMAQI
17th Sep 20253410 AMAQI
17th Sep 20253811 AMAQI
17th Sep 20254012 PMAQI
17th Sep 2025341 PMAQI
17th Sep 2025322 PMAQI
17th Sep 2025263 PMAQI
17th Sep 2025284 PMAQI
17th Sep 2025465 PMAQI
17th Sep 2025416 PMAQI
17th Sep 2025377 PMAQI
17th Sep 2025348 PMAQI
17th Sep 2025339 PMAQI
17th Sep 20253410 PMAQI
17th Sep 20253211 PMAQI
18th Sep 20253112 AMAQI
18th Sep 2025341 AMAQI
18th Sep 2025332 AMAQI
18th Sep 2025343 AMAQI
18th Sep 2025344 AMAQI
18th Sep 2025345 AMAQI
28°C26/31°C
18th Sep 2025346 AMAQI
18th Sep 2025337 AMAQI
18th Sep 2025278 AMAQI
18th Sep 2025249 AMAQI
18th Sep 20253210 AMAQI
18th Sep 20254011 AMAQI
18th Sep 20253212 PMAQI
18th Sep 2025341 PMAQI
18th Sep 2025382 PMAQI
18th Sep 2025343 PMAQI
18th Sep 2025324 PMAQI
18th Sep 2025315 PMAQI
18th Sep 2025316 PMAQI
18th Sep 2025327 PMAQI
18th Sep 2025348 PMAQI
18th Sep 2025349 PMAQI
18th Sep 20253510 PMAQI
18th Sep 20253411 PMAQI
19th Sep 20253412 AMAQI
19th Sep 2025331 AMAQI
19th Sep 2025332 AMAQI
19th Sep 2025343 AMAQI
19th Sep 2025344 AMAQI
19th Sep 2025345 AMAQI
28°C26/29°C
19th Sep 2025346 AMAQI
19th Sep 2025367 AMAQI
19th Sep 2025418 AMAQI
19th Sep 2025499 AMAQI
19th Sep 20254810 AMAQI
19th Sep 20254311 AMAQI
19th Sep 20253412 PMAQI
19th Sep 2025231 PMAQI
19th Sep 2025252 PMAQI
19th Sep 2025253 PMAQI
19th Sep 2025284 PMAQI
19th Sep 2025245 PMAQI
19th Sep 2025286 PMAQI
19th Sep 2025307 PMAQI
19th Sep 2025338 PMAQI
19th Sep 2025399 PMAQI
19th Sep 20254210 PMAQI
19th Sep 20253811 PMAQI
20th Sep 20254312 AMAQI
20th Sep 2025341 AMAQI
20th Sep 2025342 AMAQI
20th Sep 2025353 AMAQI
20th Sep 2025354 AMAQI
20th Sep 2025355 AMAQI
28°C26/31°C
20th Sep 2025356 AMAQI
20th Sep 2025357 AMAQI
20th Sep 2025358 AMAQI
20th Sep 2025379 AMAQI
20th Sep 20254110 AMAQI
20th Sep 20253711 AMAQI
20th Sep 20253212 PMAQI
20th Sep 2025341 PMAQI
20th Sep 2025442 PMAQI
20th Sep 2025473 PMAQI
20th Sep 2025444 PMAQI
20th Sep 2025425 PMAQI
20th Sep 2025426 PMAQI
20th Sep 2025427 PMAQI
20th Sep 2025428 PMAQI
20th Sep 2025449 PMAQI
20th Sep 20254710 PMAQI
20th Sep 20255611 PMAQI
21st Sep 20255412 AMAQI
21st Sep 2025371 AMAQI
21st Sep 2025362 AMAQI
21st Sep 2025363 AMAQI
21st Sep 2025374 AMAQI
21st Sep 2025365 AMAQI
28°C26/30°C
21st Sep 2025376 AMAQI
6 AM21st Sep 2025377 AMAQI
21st Sep 2025408 AMAQI
21st Sep 2025489 AMAQI
21st Sep 20255410 AMAQI
21st Sep 20255211 AMAQI
21st Sep 20254212 PMAQI
12 PM21st Sep 2025381 PMAQI
21st Sep 2025492 PMAQI
21st Sep 2025563 PMAQI
21st Sep 2025484 PMAQI
21st Sep 2025555 PMAQI
21st Sep 2025536 PMAQI
6 PM21st Sep 2025497 PMAQI
21st Sep 2025438 PMAQI
21st Sep 2025479 PMAQI
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 7 AM
40AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
3 PM - 5 PM
34AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 40), while the lowest AQI was between 3 PM to 5 PM (Avg. 34).
Night time
Avg. Highest Time
12 AM - 11 PM
39AQI
11 hours / Day
330 hours / Month
Avg. Lowest Time
7 PM - 11 PM
39AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 39), while the lowest AQI was between 7 PM to 11 PM (Avg. 39).
2025 Days Vs Air Quality
Hainan University, Haikou, Hainan, China
2025
42%
110
54%
141
5%
12
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Good
110 DaysModerate
141 DaysPoor
12 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 42%
Health Risk Level:
Significant
In 2025, 42% of 264 days were within WHO’s safe air quality limits, and 58% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
Hainan 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
113AQI
113AQI
2nd January 2025
111AQI
111AQI
3rd January 2025
107AQI
107AQI
4th January 2025
94AQI
94AQI
5th January 2025
115AQI
115AQI
6th January 2025
125AQI
125AQI
7th January 2025
93AQI
93AQI
8th January 2025
93AQI
93AQI
9th January 2025
121AQI
121AQI
10th January 2025
106AQI
106AQI
11th January 2025
90AQI
90AQI
12th January 2025
77AQI
77AQI
13th January 2025
77AQI
77AQI
14th January 2025
74AQI
74AQI
15th January 2025
77AQI
77AQI
16th January 2025
88AQI
88AQI
17th January 2025
87AQI
87AQI
18th January 2025
85AQI
85AQI
19th January 2025
89AQI
89AQI
20th January 2025
95AQI
95AQI
21st January 2025
77AQI
77AQI
22nd January 2025
91AQI
91AQI
23rd January 2025
84AQI
84AQI
24th January 2025
68AQI
68AQI
25th January 2025
60AQI
60AQI
26th January 2025
58AQI
58AQI
27th January 2025
58AQI
58AQI
28th January 2025
60AQI
60AQI
29th January 2025
72AQI
72AQI
30th January 2025
67AQI
67AQI
31st January 2025
72AQI
72AQI
1st February 2025
58AQI
58AQI
2nd February 2025
52AQI
52AQI
3rd February 2025
69AQI
69AQI
4th February 2025
54AQI
54AQI
5th February 2025
60AQI
60AQI
6th February 2025
63AQI
63AQI
7th February 2025
73AQI
73AQI
8th February 2025
59AQI
59AQI
9th February 2025
69AQI
69AQI
10th February 2025
64AQI
64AQI
11th February 2025
64AQI
64AQI
12th February 2025
58AQI
58AQI
13th February 2025
70AQI
70AQI
14th February 2025
55AQI
55AQI
15th February 2025
72AQI
72AQI
16th February 2025
51AQI
51AQI
17th February 2025
77AQI
77AQI
18th February 2025
79AQI
79AQI
19th February 2025
74AQI
74AQI
20th February 2025
71AQI
71AQI
21st February 2025
65AQI
65AQI
22nd February 2025
57AQI
57AQI
23rd February 2025
76AQI
76AQI
24th February 2025
55AQI
55AQI
25th February 2025
71AQI
71AQI
26th February 2025
87AQI
87AQI
27th February 2025
73AQI
73AQI
28th February 2025
67AQI
67AQI
1st March 2025
62AQI
62AQI
2nd March 2025
58AQI
58AQI
3rd March 2025
64AQI
64AQI
4th March 2025
58AQI
58AQI
5th March 2025
54AQI
54AQI
6th March 2025
37AQI
37AQI
7th March 2025
46AQI
46AQI
8th March 2025
56AQI
56AQI
9th March 2025
65AQI
65AQI
10th March 2025
71AQI
71AQI
11th March 2025
70AQI
70AQI
12th March 2025
67AQI
67AQI
13th March 2025
62AQI
62AQI
14th March 2025
52AQI
52AQI
15th March 2025
60AQI
60AQI
16th March 2025
47AQI
47AQI
17th March 2025
69AQI
69AQI
18th March 2025
68AQI
68AQI
19th March 2025
85AQI
85AQI
20th March 2025
81AQI
81AQI
21st March 2025
83AQI
83AQI
22nd March 2025
78AQI
78AQI
23rd March 2025
72AQI
72AQI
24th March 2025
72AQI
72AQI
25th March 2025
75AQI
75AQI
26th March 2025
73AQI
73AQI
27th March 2025
70AQI
70AQI
28th March 2025
69AQI
69AQI
29th March 2025
52AQI
52AQI
30th March 2025
42AQI
42AQI
31st March 2025
55AQI
55AQI
1st April 2025
60AQI
60AQI
2nd April 2025
71AQI
71AQI
3rd April 2025
58AQI
58AQI
4th April 2025
62AQI
62AQI
5th April 2025
67AQI
67AQI
6th April 2025
75AQI
75AQI
7th April 2025
77AQI
77AQI
8th April 2025
69AQI
69AQI
9th April 2025
66AQI
66AQI
10th April 2025
73AQI
73AQI
11th April 2025
64AQI
64AQI
12th April 2025
70AQI
70AQI
13th April 2025
129AQI
129AQI
14th April 2025
134AQI
134AQI
15th April 2025
148AQI
148AQI
16th April 2025
138AQI
138AQI
17th April 2025
114AQI
114AQI
18th April 2025
95AQI
95AQI
19th April 2025
84AQI
84AQI
20th April 2025
65AQI
65AQI
21st April 2025
65AQI
65AQI
22nd April 2025
65AQI
65AQI
23rd April 2025
61AQI
61AQI
24th April 2025
65AQI
65AQI
25th April 2025
61AQI
61AQI
26th April 2025
52AQI
52AQI
27th April 2025
46AQI
46AQI
28th April 2025
59AQI
59AQI
29th April 2025
64AQI
64AQI
30th April 2025
63AQI
63AQI
1st May 2025
54AQI
54AQI
2nd May 2025
60AQI
60AQI
3rd May 2025
58AQI
58AQI
4th May 2025
58AQI
58AQI
5th May 2025
56AQI
56AQI
6th May 2025
59AQI
59AQI
7th May 2025
59AQI
59AQI
8th May 2025
52AQI
52AQI
9th May 2025
56AQI
56AQI
10th May 2025
50AQI
50AQI
11th May 2025
59AQI
59AQI
12th May 2025
63AQI
63AQI
13th May 2025
58AQI
58AQI
14th May 2025
48AQI
48AQI
15th May 2025
45AQI
45AQI
16th May 2025
46AQI
46AQI
17th May 2025
44AQI
44AQI
18th May 2025
50AQI
50AQI
19th May 2025
46AQI
46AQI
20th May 2025
52AQI
52AQI
21st May 2025
47AQI
47AQI
22nd May 2025
46AQI
46AQI
23rd May 2025
39AQI
39AQI
24th May 2025
41AQI
41AQI
25th May 2025
60AQI
60AQI
26th May 2025
71AQI
71AQI
27th May 2025
61AQI
61AQI
28th May 2025
55AQI
55AQI
29th May 2025
50AQI
50AQI
30th May 2025
47AQI
47AQI
31st May 2025
46AQI
46AQI
1st June 2025
49AQI
49AQI
2nd June 2025
49AQI
49AQI
3rd June 2025
58AQI
58AQI
4th June 2025
54AQI
54AQI
5th June 2025
45AQI
45AQI
6th June 2025
43AQI
43AQI
7th June 2025
48AQI
48AQI
8th June 2025
52AQI
52AQI
9th June 2025
50AQI
50AQI
10th June 2025
50AQI
50AQI
11th June 2025
51AQI
51AQI
12th June 2025
39AQI
39AQI
13th June 2025
38AQI
38AQI
14th June 2025
41AQI
41AQI
15th June 2025
45AQI
45AQI
16th June 2025
50AQI
50AQI
17th June 2025
51AQI
51AQI
18th June 2025
47AQI
47AQI
19th June 2025
45AQI
45AQI
20th June 2025
44AQI
44AQI
21st June 2025
41AQI
41AQI
22nd June 2025
37AQI
37AQI
23rd June 2025
35AQI
35AQI
24th June 2025
34AQI
34AQI
25th June 2025
31AQI
31AQI
26th June 2025
29AQI
29AQI
27th June 2025
30AQI
30AQI
28th June 2025
34AQI
34AQI
29th June 2025
34AQI
34AQI
30th June 2025
35AQI
35AQI
1st July 2025
33AQI
33AQI
2nd July 2025
30AQI
30AQI
3rd July 2025
33AQI
33AQI
4th July 2025
32AQI
32AQI
5th July 2025
39AQI
39AQI
6th July 2025
37AQI
37AQI
7th July 2025
37AQI
37AQI
8th July 2025
45AQI
45AQI
9th July 2025
47AQI
47AQI
10th July 2025
48AQI
48AQI
11th July 2025
50AQI
50AQI
12th July 2025
48AQI
48AQI
13th July 2025
52AQI
52AQI
14th July 2025
53AQI
53AQI
15th July 2025
55AQI
55AQI
16th July 2025
55AQI
55AQI
17th July 2025
51AQI
51AQI
18th July 2025
51AQI
51AQI
19th July 2025
45AQI
45AQI
20th July 2025
40AQI
40AQI
21st July 2025
37AQI
37AQI
22nd July 2025
40AQI
40AQI
23rd July 2025
45AQI
45AQI
24th July 2025
36AQI
36AQI
25th July 2025
39AQI
39AQI
26th July 2025
38AQI
38AQI
27th July 2025
45AQI
45AQI
28th July 2025
36AQI
36AQI
29th July 2025
38AQI
38AQI
30th July 2025
39AQI
39AQI
31st July 2025
47AQI
47AQI
1st August 2025
56AQI
56AQI
2nd August 2025
56AQI
56AQI
3rd August 2025
58AQI
58AQI
4th August 2025
57AQI
57AQI
5th August 2025
56AQI
56AQI
6th August 2025
55AQI
55AQI
7th August 2025
58AQI
58AQI
8th August 2025
56AQI
56AQI
9th August 2025
58AQI
58AQI
10th August 2025
55AQI
55AQI
11th August 2025
49AQI
49AQI
12th August 2025
47AQI
47AQI
13th August 2025
49AQI
49AQI
14th August 2025
49AQI
49AQI
15th August 2025
35AQI
35AQI
16th August 2025
35AQI
35AQI
17th August 2025
33AQI
33AQI
18th August 2025
32AQI
32AQI
19th August 2025
36AQI
36AQI
20th August 2025
37AQI
37AQI
21st August 2025
37AQI
37AQI
22nd August 2025
40AQI
40AQI
23rd August 2025
39AQI
39AQI
24th August 2025
43AQI
43AQI
25th August 2025
39AQI
39AQI
26th August 2025
37AQI
37AQI
27th August 2025
45AQI
45AQI
28th August 2025
48AQI
48AQI
29th August 2025
49AQI
49AQI
30th August 2025
45AQI
45AQI
31st August 2025
42AQI
42AQI
1st September 2025
42AQI
42AQI
2nd September 2025
39AQI
39AQI
3rd September 2025
38AQI
38AQI
4th September 2025
33AQI
33AQI
5th September 2025
35AQI
35AQI
6th September 2025
31AQI
31AQI
7th September 2025
44AQI
44AQI
8th September 2025
42AQI
42AQI
9th September 2025
37AQI
37AQI
10th September 2025
36AQI
36AQI
11th September 2025
36AQI
36AQI
12th September 2025
35AQI
35AQI
13th September 2025
33AQI
33AQI
14th September 2025
32AQI
32AQI
15th September 2025
31AQI
31AQI
16th September 2025
30AQI
30AQI
17th September 2025
34AQI
34AQI
18th September 2025
33AQI
33AQI
19th September 2025
34AQI
34AQI
20th September 2025
37AQI
37AQI
21st September 2025
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
87AQI
66AQI
64AQI
77AQI
53AQI
43AQI
43AQI
46AQI
36AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202558AQI
24
7
28
4
27
1
24
5
14
17
25
5
25
6
21
10
20
110
141
12
Highest AQI recorded in
January87AQI
Lowest AQI recorded in
September36AQI
202456AQI
7
23
1
11
16
2
8
23
3
27
20
11
26
4
29
2
25
6
22
6
6
22
3
1
28
1
25
6
158
193
13
Highest AQI recorded in
December85AQI
Lowest AQI recorded in
July28AQI
202357AQI
5
19
7
9
17
2
3
25
3
3
27
18
13
25
5
29
2
22
9
26
4
11
19
1
9
15
2
7
21
3
167
176
18
Highest AQI recorded in
January83AQI
Lowest AQI recorded in
July35AQI
202254AQI
10
19
2
14
6
1
10
21
13
16
25
6
23
7
18
3
1
5
22
1
8
23
15
15
3
23
4
1
145
161
8
1
Highest AQI recorded in
December75AQI
Lowest AQI recorded in
July31AQI
202152AQI
3
18
8
2
7
21
14
15
2
18
12
26
5
18
12
30
1
28
3
26
4
20
11
8
20
2
1
26
4
199
148
16
2
Highest AQI recorded in
January93AQI
Lowest AQI recorded in
September31AQI
202053AQI
7
5
1
7
14
9
9
29
1
18
1
18
6
28
2
9
21
1
8
18
4
2
18
10
1
135
95
16
1
Highest AQI recorded in
December89AQI
Lowest AQI recorded in
September33AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
58AQILeast Polluted Year Recorded
2021(Avg.)
52AQIHainan University's annual 2025 AQI (58) shows an average percentage change of 6.4% (worsened AQI) compared to previous years: 2020 (53), 2021 (52), 2022 (54), 2023 (57), 2024 (56).
