Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Hefei, Anhui, 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

Hefei, Anhui, China

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
29th Sep 2023
124AQI
Lowest AQI recorded on
2nd Sep 2026
22AQI

Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 32 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.

Day & Night AQI Trend: 28th Sep - 29th Sep 2026

Hefei, Anhui, China

AQI
Day
Night
.

5 AM28th Sep 2026

6 PM

4 AM29th Sep 2026

Day time
Avg. Highest Time
2PM28th Sep

28AQI

Avg. Lowest Time
6PM28th Sep

22AQI

Night time
Avg. Highest Time
4AM29th Sep

31AQI

Avg. Lowest Time
5AM28th Sep

18AQI

In the last 24 hours,

Hefei's AQI reached its highest point of 31 at 4 AM during the Night, while the lowest point, 18, was recorded at 5 AM during the Night between 28th Sep and 29th Sep 2026.

Day & Night AQI Trend : Aug - Sep 2026

Hefei, Anhui, China

AugSep
31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th
Day
Night
31st Aug 2026655 AMAQI
31st Aug 2026796 AMAQI
31st Aug 2026927 AMAQI
31st Aug 20261068 AMAQI
31st Aug 20261059 AMAQI
31st Aug 20269110 AMAQI
31st Aug 20266411 AMAQI
31st Aug 20265412 PMAQI
31st Aug 2026461 PMAQI
31st Aug 2026472 PMAQI
31st Aug 2026493 PMAQI
31st Aug 2026494 PMAQI
31st Aug 2026485 PMAQI
31st Aug 2026466 PMAQI
31st Aug 2026457 PMAQI
31st Aug 2026468 PMAQI
31st Aug 2026529 PMAQI
31st Aug 20265810 PMAQI
31st Aug 20265011 PMAQI
1st Sep 20264512 AMAQI
1st Sep 2026311 AMAQI
1st Sep 2026232 AMAQI
1st Sep 2026223 AMAQI
1st Sep 2026234 AMAQI

24°C23/25°C

1st Sep 2026175 AMAQI
1st Sep 2026216 AMAQI
1st Sep 2026207 AMAQI
1st Sep 2026218 AMAQI
1st Sep 2026289 AMAQI
1st Sep 20264010 AMAQI
1st Sep 20264111 AMAQI
1st Sep 20263712 PMAQI
1st Sep 2026371 PMAQI
1st Sep 2026342 PMAQI
1st Sep 2026323 PMAQI
1st Sep 2026334 PMAQI
1st Sep 2026435 PMAQI
1st Sep 2026566 PMAQI
1st Sep 2026597 PMAQI
1st Sep 2026558 PMAQI
1st Sep 2026529 PMAQI
1st Sep 20264610 PMAQI
1st Sep 20263411 PMAQI
2nd Sep 20263112 AMAQI
2nd Sep 2026231 AMAQI
2nd Sep 2026202 AMAQI
2nd Sep 2026173 AMAQI
2nd Sep 2026174 AMAQI

23°C22/25°C

2nd Sep 2026175 AMAQI
2nd Sep 2026176 AMAQI
2nd Sep 2026197 AMAQI
2nd Sep 2026208 AMAQI
2nd Sep 2026249 AMAQI
2nd Sep 20262410 AMAQI
2nd Sep 20262411 AMAQI
2nd Sep 20262212 PMAQI
2nd Sep 2026211 PMAQI
2nd Sep 2026232 PMAQI
2nd Sep 2026233 PMAQI
2nd Sep 2026234 PMAQI
2nd Sep 2026245 PMAQI
2nd Sep 2026226 PMAQI
2nd Sep 2026247 PMAQI
2nd Sep 2026258 PMAQI
2nd Sep 2026249 PMAQI
2nd Sep 20262510 PMAQI
2nd Sep 20262611 PMAQI
3rd Sep 20262512 AMAQI
3rd Sep 2026271 AMAQI
3rd Sep 2026272 AMAQI
3rd Sep 2026273 AMAQI
3rd Sep 2026274 AMAQI

23°C21/25°C

3rd Sep 2026295 AMAQI
3rd Sep 2026306 AMAQI
3rd Sep 2026307 AMAQI
3rd Sep 2026288 AMAQI
3rd Sep 2026279 AMAQI
3rd Sep 20262910 AMAQI
3rd Sep 20262311 AMAQI
3rd Sep 20262312 PMAQI
3rd Sep 2026251 PMAQI
3rd Sep 2026252 PMAQI
3rd Sep 2026253 PMAQI
3rd Sep 2026254 PMAQI
3rd Sep 2026265 PMAQI
3rd Sep 2026286 PMAQI
3rd Sep 2026307 PMAQI
3rd Sep 2026328 PMAQI
3rd Sep 2026359 PMAQI
3rd Sep 20263510 PMAQI
3rd Sep 20263411 PMAQI
4th Sep 20263512 AMAQI
4th Sep 2026361 AMAQI
4th Sep 2026362 AMAQI
4th Sep 2026353 AMAQI
4th Sep 2026334 AMAQI

23°C22/25°C

4th Sep 2026315 AMAQI
4th Sep 2026306 AMAQI
4th Sep 2026317 AMAQI
4th Sep 2026348 AMAQI
4th Sep 2026329 AMAQI
4th Sep 20263210 AMAQI
4th Sep 20263111 AMAQI
4th Sep 20262812 PMAQI
4th Sep 2026301 PMAQI
4th Sep 2026292 PMAQI
4th Sep 2026263 PMAQI
4th Sep 2026264 PMAQI
4th Sep 2026305 PMAQI
4th Sep 2026296 PMAQI
4th Sep 2026277 PMAQI
4th Sep 2026298 PMAQI
4th Sep 2026329 PMAQI
4th Sep 20263410 PMAQI
4th Sep 20263211 PMAQI
5th Sep 20263512 AMAQI
5th Sep 2026371 AMAQI
5th Sep 2026372 AMAQI
5th Sep 2026393 AMAQI
5th Sep 2026404 AMAQI

24°C21/29°C

5th Sep 2026425 AMAQI
5th Sep 2026446 AMAQI
5th Sep 2026477 AMAQI
5th Sep 2026648 AMAQI
5th Sep 2026649 AMAQI
5th Sep 20266010 AMAQI
5th Sep 20264711 AMAQI
5th Sep 20263912 PMAQI
5th Sep 2026331 PMAQI
5th Sep 2026302 PMAQI
5th Sep 2026283 PMAQI
5th Sep 2026294 PMAQI
5th Sep 2026265 PMAQI
5th Sep 2026246 PMAQI
5th Sep 2026247 PMAQI
5th Sep 2026278 PMAQI
5th Sep 2026419 PMAQI
5th Sep 20264510 PMAQI
5th Sep 20264711 PMAQI
6th Sep 20264912 AMAQI
6th Sep 2026511 AMAQI
6th Sep 2026612 AMAQI
6th Sep 2026623 AMAQI
6th Sep 2026504 AMAQI

24°C20/29°C

6th Sep 2026425 AMAQI
6th Sep 2026406 AMAQI
6th Sep 2026467 AMAQI
6th Sep 2026528 AMAQI
6th Sep 2026389 AMAQI
6th Sep 20262210 AMAQI
6th Sep 20263711 AMAQI
6th Sep 20262512 PMAQI
6th Sep 2026211 PMAQI
6th Sep 2026202 PMAQI
6th Sep 2026213 PMAQI
6th Sep 2026214 PMAQI
6th Sep 2026235 PMAQI
6th Sep 2026276 PMAQI
6th Sep 2026237 PMAQI
6th Sep 2026268 PMAQI
6th Sep 2026259 PMAQI
6th Sep 20262710 PMAQI
6th Sep 20262911 PMAQI
7th Sep 20262912 AMAQI
7th Sep 2026261 AMAQI
7th Sep 2026242 AMAQI
7th Sep 2026243 AMAQI
7th Sep 2026254 AMAQI

24°C20/29°C

7th Sep 2026275 AMAQI
7th Sep 2026256 AMAQI
7th Sep 2026277 AMAQI
7th Sep 2026428 AMAQI
7th Sep 2026459 AMAQI
7th Sep 20263510 AMAQI
7th Sep 20262311 AMAQI
7th Sep 20262512 PMAQI
7th Sep 2026271 PMAQI
7th Sep 2026322 PMAQI
7th Sep 2026363 PMAQI
7th Sep 2026394 PMAQI
7th Sep 2026495 PMAQI
7th Sep 2026596 PMAQI
7th Sep 2026667 PMAQI
7th Sep 2026668 PMAQI
7th Sep 2026639 PMAQI
7th Sep 20266510 PMAQI
7th Sep 20266711 PMAQI
8th Sep 20265712 AMAQI
8th Sep 2026481 AMAQI
8th Sep 2026422 AMAQI
8th Sep 2026423 AMAQI
8th Sep 2026404 AMAQI

24°C20/29°C

8th Sep 2026405 AMAQI
8th Sep 2026406 AMAQI
8th Sep 2026447 AMAQI
8th Sep 2026558 AMAQI
8th Sep 2026569 AMAQI
8th Sep 20265510 AMAQI
8th Sep 20265411 AMAQI
8th Sep 20263212 PMAQI
8th Sep 2026371 PMAQI
8th Sep 2026432 PMAQI
8th Sep 2026483 PMAQI
8th Sep 2026514 PMAQI
8th Sep 2026545 PMAQI
8th Sep 2026536 PMAQI
8th Sep 2026567 PMAQI
8th Sep 2026718 PMAQI
8th Sep 2026759 PMAQI
8th Sep 20267410 PMAQI
8th Sep 20267611 PMAQI
9th Sep 20268612 AMAQI
9th Sep 2026951 AMAQI
9th Sep 2026902 AMAQI
9th Sep 2026733 AMAQI
9th Sep 2026594 AMAQI

25°C21/30°C

9th Sep 2026575 AMAQI
9th Sep 2026466 AMAQI
9th Sep 2026327 AMAQI
9th Sep 2026338 AMAQI
9th Sep 2026359 AMAQI
9th Sep 20264010 AMAQI
9th Sep 20264111 AMAQI
9th Sep 20264112 PMAQI
9th Sep 2026431 PMAQI
9th Sep 2026422 PMAQI
9th Sep 2026393 PMAQI
9th Sep 2026374 PMAQI
9th Sep 2026395 PMAQI
9th Sep 2026396 PMAQI
9th Sep 2026347 PMAQI
9th Sep 2026348 PMAQI
9th Sep 2026359 PMAQI
9th Sep 20263510 PMAQI
9th Sep 20263811 PMAQI
10th Sep 20263812 AMAQI
10th Sep 2026391 AMAQI
10th Sep 2026472 AMAQI
10th Sep 2026553 AMAQI
10th Sep 2026614 AMAQI

22°C18/25°C

10th Sep 2026615 AMAQI
10th Sep 2026716 AMAQI
10th Sep 2026807 AMAQI
10th Sep 2026888 AMAQI
10th Sep 2026769 AMAQI
10th Sep 20266110 AMAQI
10th Sep 20264811 AMAQI
10th Sep 20264212 PMAQI
10th Sep 2026341 PMAQI
10th Sep 2026322 PMAQI
10th Sep 2026343 PMAQI
10th Sep 2026374 PMAQI
10th Sep 2026375 PMAQI
10th Sep 2026366 PMAQI
10th Sep 2026407 PMAQI
10th Sep 2026448 PMAQI
10th Sep 2026469 PMAQI
10th Sep 20265410 PMAQI
10th Sep 20266411 PMAQI
11th Sep 20266212 AMAQI
11th Sep 2026631 AMAQI
11th Sep 2026672 AMAQI
11th Sep 2026743 AMAQI
11th Sep 2026834 AMAQI

20°C16/25°C

11th Sep 2026885 AMAQI
11th Sep 2026936 AMAQI
11th Sep 2026967 AMAQI
11th Sep 20261008 AMAQI
11th Sep 2026929 AMAQI
11th Sep 20268310 AMAQI
11th Sep 20266911 AMAQI
11th Sep 20265012 PMAQI
11th Sep 2026401 PMAQI
11th Sep 2026332 PMAQI
11th Sep 2026313 PMAQI
11th Sep 2026294 PMAQI
11th Sep 2026305 PMAQI
11th Sep 2026266 PMAQI
11th Sep 2026277 PMAQI
11th Sep 2026308 PMAQI
11th Sep 2026389 PMAQI
11th Sep 20265310 PMAQI
11th Sep 20266111 PMAQI
12th Sep 20266212 AMAQI
12th Sep 2026551 AMAQI
12th Sep 2026512 AMAQI
12th Sep 2026593 AMAQI
12th Sep 2026614 AMAQI

21°C16/26°C

12th Sep 2026615 AMAQI
12th Sep 2026636 AMAQI
12th Sep 2026647 AMAQI
12th Sep 2026708 AMAQI
12th Sep 2026869 AMAQI
12th Sep 20269510 AMAQI
12th Sep 20267711 AMAQI
12th Sep 20265912 PMAQI
12th Sep 2026381 PMAQI
12th Sep 2026282 PMAQI
12th Sep 2026253 PMAQI
12th Sep 2026254 PMAQI
12th Sep 2026285 PMAQI
12th Sep 2026306 PMAQI
12th Sep 2026397 PMAQI
12th Sep 2026528 PMAQI
12th Sep 2026599 PMAQI
12th Sep 20266210 PMAQI
12th Sep 20266211 PMAQI
13th Sep 20265912 AMAQI
13th Sep 2026601 AMAQI
13th Sep 2026622 AMAQI
13th Sep 2026643 AMAQI

23°C21/27°C

13th Sep 2026675 AMAQI
13th Sep 2026686 AMAQI
13th Sep 2026687 AMAQI
13th Sep 2026688 AMAQI
13th Sep 2026679 AMAQI
13th Sep 20267810 AMAQI
13th Sep 20267911 AMAQI
13th Sep 20266512 PMAQI
13th Sep 2026531 PMAQI
13th Sep 2026452 PMAQI
13th Sep 2026513 PMAQI
13th Sep 2026524 PMAQI
13th Sep 2026505 PMAQI
13th Sep 2026536 PMAQI
13th Sep 2026617 PMAQI
13th Sep 2026768 PMAQI
13th Sep 2026909 PMAQI
13th Sep 202610310 PMAQI
13th Sep 20269711 PMAQI
14th Sep 20268712 AMAQI
14th Sep 2026911 AMAQI
14th Sep 2026992 AMAQI
14th Sep 2026983 AMAQI
14th Sep 2026984 AMAQI

25°C20/29°C

14th Sep 2026975 AMAQI
14th Sep 2026956 AMAQI
14th Sep 2026977 AMAQI
14th Sep 2026888 AMAQI
14th Sep 2026839 AMAQI
14th Sep 20267210 AMAQI
14th Sep 20266611 AMAQI
14th Sep 20266012 PMAQI
14th Sep 2026581 PMAQI
14th Sep 2026612 PMAQI
14th Sep 2026613 PMAQI
14th Sep 2026574 PMAQI
14th Sep 2026575 PMAQI
14th Sep 2026656 PMAQI
14th Sep 2026797 PMAQI
14th Sep 20261008 PMAQI
14th Sep 2026939 PMAQI
14th Sep 20269810 PMAQI
14th Sep 202614211 PMAQI
15th Sep 202612612 AMAQI
15th Sep 20261101 AMAQI
15th Sep 20261112 AMAQI
15th Sep 20261103 AMAQI
15th Sep 20261104 AMAQI

24°C22/28°C

15th Sep 20261135 AMAQI
15th Sep 20261096 AMAQI
15th Sep 20261037 AMAQI
15th Sep 2026978 AMAQI
15th Sep 2026909 AMAQI
15th Sep 20268710 AMAQI
15th Sep 20269411 AMAQI
15th Sep 20269312 PMAQI
15th Sep 2026981 PMAQI
15th Sep 2026832 PMAQI
15th Sep 2026593 PMAQI
15th Sep 2026514 PMAQI
15th Sep 2026485 PMAQI
15th Sep 2026496 PMAQI
15th Sep 2026567 PMAQI
15th Sep 2026638 PMAQI
15th Sep 2026769 PMAQI
15th Sep 20268410 PMAQI
15th Sep 20268711 PMAQI
16th Sep 20268312 AMAQI
16th Sep 2026831 AMAQI
16th Sep 2026822 AMAQI
16th Sep 2026843 AMAQI
16th Sep 2026864 AMAQI

23°C19/27°C

16th Sep 2026895 AMAQI
16th Sep 2026926 AMAQI
16th Sep 2026937 AMAQI
16th Sep 2026988 AMAQI
16th Sep 2026969 AMAQI
16th Sep 20269410 AMAQI
16th Sep 20268111 AMAQI
16th Sep 20268012 PMAQI
16th Sep 2026791 PMAQI
16th Sep 2026632 PMAQI
16th Sep 2026503 PMAQI
16th Sep 2026524 PMAQI
16th Sep 2026525 PMAQI
16th Sep 2026556 PMAQI
16th Sep 2026637 PMAQI
16th Sep 2026828 PMAQI
16th Sep 2026999 PMAQI
16th Sep 202611010 PMAQI
16th Sep 202611711 PMAQI
17th Sep 202613012 AMAQI
17th Sep 20261391 AMAQI
17th Sep 20261412 AMAQI
17th Sep 20261463 AMAQI
17th Sep 20261494 AMAQI

23°C19/27°C

17th Sep 20261485 AMAQI
17th Sep 20261466 AMAQI
17th Sep 20261487 AMAQI
17th Sep 20261468 AMAQI
17th Sep 20261449 AMAQI
17th Sep 202614410 AMAQI
17th Sep 202615111 AMAQI
17th Sep 202615412 PMAQI
17th Sep 20261541 PMAQI
17th Sep 20261502 PMAQI
17th Sep 20261183 PMAQI
17th Sep 2026874 PMAQI
17th Sep 2026765 PMAQI
17th Sep 2026676 PMAQI
17th Sep 2026507 PMAQI
17th Sep 2026478 PMAQI
17th Sep 2026419 PMAQI
17th Sep 20263410 PMAQI
17th Sep 20263511 PMAQI
18th Sep 20263812 AMAQI
18th Sep 2026381 AMAQI
18th Sep 2026432 AMAQI
18th Sep 2026323 AMAQI
18th Sep 2026334 AMAQI

20°C17/23°C

18th Sep 2026415 AMAQI
18th Sep 2026516 AMAQI
18th Sep 2026587 AMAQI
18th Sep 2026588 AMAQI
18th Sep 2026519 AMAQI
18th Sep 20264110 AMAQI
18th Sep 20263611 AMAQI
18th Sep 20264212 PMAQI
18th Sep 2026541 PMAQI
18th Sep 2026672 PMAQI
18th Sep 2026713 PMAQI
18th Sep 2026714 PMAQI
18th Sep 2026695 PMAQI
18th Sep 2026626 PMAQI
18th Sep 2026607 PMAQI
18th Sep 2026608 PMAQI
18th Sep 2026639 PMAQI
18th Sep 20267010 PMAQI
18th Sep 20267611 PMAQI
19th Sep 20267812 AMAQI
19th Sep 2026831 AMAQI
19th Sep 2026892 AMAQI
19th Sep 2026933 AMAQI
19th Sep 20261014 AMAQI

20°C19/23°C

19th Sep 20261125 AMAQI
19th Sep 20261136 AMAQI
19th Sep 20261167 AMAQI
19th Sep 20261168 AMAQI
19th Sep 20261109 AMAQI
19th Sep 202610510 AMAQI
19th Sep 202611011 AMAQI
19th Sep 202611012 PMAQI
19th Sep 20261001 PMAQI
19th Sep 2026792 PMAQI
19th Sep 2026623 PMAQI
19th Sep 2026554 PMAQI
19th Sep 2026515 PMAQI
19th Sep 2026466 PMAQI
19th Sep 2026427 PMAQI
19th Sep 2026398 PMAQI
19th Sep 2026389 PMAQI
19th Sep 20263710 PMAQI
19th Sep 20263911 PMAQI
20th Sep 20264512 AMAQI
20th Sep 2026451 AMAQI
20th Sep 2026462 AMAQI
20th Sep 2026473 AMAQI
20th Sep 2026494 AMAQI

24°C21/28°C

20th Sep 2026575 AMAQI
20th Sep 2026596 AMAQI
20th Sep 2026617 AMAQI
20th Sep 2026648 AMAQI
20th Sep 2026679 AMAQI
20th Sep 20267810 AMAQI
20th Sep 20268911 AMAQI
20th Sep 20269212 PMAQI
20th Sep 2026921 PMAQI
20th Sep 2026862 PMAQI
20th Sep 2026813 PMAQI
20th Sep 2026814 PMAQI
20th Sep 2026775 PMAQI
20th Sep 2026756 PMAQI
20th Sep 2026757 PMAQI
20th Sep 2026778 PMAQI
20th Sep 2026789 PMAQI
20th Sep 20267610 PMAQI
20th Sep 20267211 PMAQI
21st Sep 20267112 AMAQI
21st Sep 2026691 AMAQI
21st Sep 2026712 AMAQI
21st Sep 2026743 AMAQI
21st Sep 2026774 AMAQI

24°C22/27°C

21st Sep 2026875 AMAQI
21st Sep 2026916 AMAQI
21st Sep 2026947 AMAQI
21st Sep 2026898 AMAQI
21st Sep 2026809 AMAQI
21st Sep 20265710 AMAQI
21st Sep 20264711 AMAQI
21st Sep 20264312 PMAQI
21st Sep 2026431 PMAQI
21st Sep 2026502 PMAQI
21st Sep 2026623 PMAQI
21st Sep 2026814 PMAQI
21st Sep 20261015 PMAQI
21st Sep 20261016 PMAQI
21st Sep 20261037 PMAQI
21st Sep 20261238 PMAQI
21st Sep 20261419 PMAQI
21st Sep 202614010 PMAQI
21st Sep 202613911 PMAQI
22nd Sep 202614112 AMAQI
22nd Sep 2026971 AMAQI
22nd Sep 2026712 AMAQI
22nd Sep 20261273 AMAQI
22nd Sep 20261294 AMAQI

22°C21/24°C

22nd Sep 2026855 AMAQI
22nd Sep 2026426 AMAQI
22nd Sep 2026477 AMAQI
22nd Sep 2026618 AMAQI
22nd Sep 2026919 AMAQI
22nd Sep 202610310 AMAQI
22nd Sep 202611311 AMAQI
22nd Sep 202612612 PMAQI
22nd Sep 20261341 PMAQI
22nd Sep 20261412 PMAQI
22nd Sep 20261323 PMAQI
22nd Sep 20261214 PMAQI
22nd Sep 20261035 PMAQI
22nd Sep 2026986 PMAQI
22nd Sep 2026997 PMAQI
22nd Sep 20261038 PMAQI
22nd Sep 20261009 PMAQI
22nd Sep 20269210 PMAQI
22nd Sep 202610011 PMAQI
23rd Sep 202611312 AMAQI
23rd Sep 20261181 AMAQI
23rd Sep 20261212 AMAQI
23rd Sep 20261323 AMAQI
23rd Sep 20261404 AMAQI

21°C20/22°C

23rd Sep 20261415 AMAQI
23rd Sep 20261386 AMAQI
23rd Sep 20261407 AMAQI
23rd Sep 20261368 AMAQI
23rd Sep 20261319 AMAQI
23rd Sep 202612510 AMAQI
23rd Sep 202610811 AMAQI
23rd Sep 20268812 PMAQI
23rd Sep 2026811 PMAQI
23rd Sep 2026842 PMAQI
23rd Sep 2026863 PMAQI
23rd Sep 2026864 PMAQI
23rd Sep 2026925 PMAQI
23rd Sep 2026976 PMAQI
23rd Sep 2026977 PMAQI
23rd Sep 20261078 PMAQI
23rd Sep 20261199 PMAQI
23rd Sep 202612010 PMAQI
23rd Sep 202612311 PMAQI
24th Sep 202612212 AMAQI
24th Sep 20261191 AMAQI
24th Sep 20261122 AMAQI
24th Sep 20261113 AMAQI
24th Sep 20261164 AMAQI

23°C21/26°C

24th Sep 20261185 AMAQI
24th Sep 20261186 AMAQI
24th Sep 20261107 AMAQI
24th Sep 20261068 AMAQI
24th Sep 20261029 AMAQI
24th Sep 202610210 AMAQI
24th Sep 202610711 AMAQI
24th Sep 202610812 PMAQI
24th Sep 20261041 PMAQI
24th Sep 2026952 PMAQI
24th Sep 2026843 PMAQI
24th Sep 2026744 PMAQI
24th Sep 2026645 PMAQI
24th Sep 2026596 PMAQI
24th Sep 2026617 PMAQI
24th Sep 2026718 PMAQI
24th Sep 2026859 PMAQI
24th Sep 20268410 PMAQI
24th Sep 20268111 PMAQI
25th Sep 20267812 AMAQI
25th Sep 2026761 AMAQI
25th Sep 2026762 AMAQI
25th Sep 2026763 AMAQI
25th Sep 2026764 AMAQI

24°C22/28°C

25th Sep 2026775 AMAQI
25th Sep 2026796 AMAQI
25th Sep 2026827 AMAQI
25th Sep 2026878 AMAQI
25th Sep 2026989 AMAQI
25th Sep 202610210 AMAQI
25th Sep 202610111 AMAQI
25th Sep 20269012 PMAQI
25th Sep 2026731 PMAQI
25th Sep 2026592 PMAQI
25th Sep 2026393 PMAQI
25th Sep 2026354 PMAQI
25th Sep 2026415 PMAQI
25th Sep 2026526 PMAQI
25th Sep 20261037 PMAQI
25th Sep 20261258 PMAQI
25th Sep 20261329 PMAQI
25th Sep 202612310 PMAQI
25th Sep 202610611 PMAQI
26th Sep 20268212 AMAQI
26th Sep 2026731 AMAQI
26th Sep 2026652 AMAQI
26th Sep 2026643 AMAQI
26th Sep 2026654 AMAQI

25°C22/30°C

26th Sep 2026705 AMAQI
26th Sep 2026726 AMAQI
26th Sep 2026657 AMAQI
26th Sep 2026628 AMAQI
26th Sep 2026599 AMAQI
26th Sep 20265110 AMAQI
26th Sep 20264111 AMAQI
26th Sep 20262112 PMAQI
26th Sep 2026201 PMAQI
26th Sep 2026162 PMAQI
26th Sep 2026143 PMAQI
26th Sep 2026114 PMAQI
26th Sep 2026115 PMAQI
26th Sep 2026116 PMAQI
26th Sep 2026117 PMAQI
26th Sep 2026118 PMAQI
26th Sep 2026129 PMAQI
26th Sep 20261410 PMAQI
26th Sep 20261511 PMAQI
27th Sep 20261612 AMAQI
27th Sep 2026221 AMAQI
27th Sep 2026342 AMAQI
27th Sep 2026503 AMAQI
27th Sep 2026534 AMAQI

22°C21/24°C

27th Sep 2026495 AMAQI
27th Sep 2026386 AMAQI
27th Sep 2026297 AMAQI
27th Sep 2026288 AMAQI
27th Sep 2026259 AMAQI
27th Sep 20262410 AMAQI
27th Sep 20262511 AMAQI
27th Sep 20262012 PMAQI
27th Sep 2026141 PMAQI
27th Sep 2026112 PMAQI
27th Sep 2026113 PMAQI
27th Sep 2026114 PMAQI
27th Sep 2026125 PMAQI
27th Sep 2026126 PMAQI
27th Sep 2026127 PMAQI
27th Sep 2026158 PMAQI
27th Sep 2026189 PMAQI
27th Sep 20262210 PMAQI
27th Sep 20262111 PMAQI
28th Sep 20261912 AMAQI
28th Sep 2026171 AMAQI
28th Sep 2026142 AMAQI
28th Sep 2026123 AMAQI
28th Sep 2026144 AMAQI

23°C22/24°C

28th Sep 2026185 AMAQI
28th Sep 2026226 AMAQI
28th Sep 2026267 AMAQI
28th Sep 2026268 AMAQI
28th Sep 2026249 AMAQI
28th Sep 20262410 AMAQI
28th Sep 20262211 AMAQI
28th Sep 20262212 PMAQI
28th Sep 2026231 PMAQI
28th Sep 2026282 PMAQI
28th Sep 2026273 PMAQI
28th Sep 2026284 PMAQI
28th Sep 2026255 PMAQI
28th Sep 2026226 PMAQI
28th Sep 2026237 PMAQI
28th Sep 2026238 PMAQI
28th Sep 2026289 PMAQI
28th Sep 20262810 PMAQI
28th Sep 20262111 PMAQI
29th Sep 20262412 AMAQI
29th Sep 2026251 AMAQI
29th Sep 2026282 AMAQI
29th Sep 2026273 AMAQI
29th Sep 2026314 AMAQI

21°C20/22°C

29th Sep 2026355 AMAQI
5 AM
29th Sep 2026346 AMAQI
29th Sep 2026327 AMAQI
29th Sep 2026318 AMAQI
29th Sep 2026329 AMAQI
29th Sep 20263010 AMAQI
29th Sep 20263211 AMAQI
11 AM
29th Sep 20263412 PMAQI
29th Sep 2026351 PMAQI
29th Sep 2026342 PMAQI
29th Sep 2026273 PMAQI
29th Sep 2026284 PMAQI
29th Sep 2026305 PMAQI
29th Sep 2026326 PMAQI
6 PM
29th Sep 2026387 PMAQI
29th Sep 2026418 PMAQI
29th Sep 2026379 PMAQI
29th Sep 20263310 PMAQI
29th Sep 20263011 PMAQI
11 PM
4 AM

20°C19/21°C

Day time
Avg. Highest Time
5 AM - 9 AM

67AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
3 PM - 6 PM

48AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 9 AM (Avg. 67), while the lowest AQI was between 3 PM to 6 PM (Avg. 48).
Night time
Avg. Highest Time
4 AM

65AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
7 PM

51AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 4 AM (Avg. 65), while the lowest AQI was between 7 PM to 7 PM (Avg. 51).

2026 Days Vs Air Quality

Hefei, Anhui, China

2026

38%

104

36%

99

23%

63

2%

6

Total number of days with different AQI categories in last 272 days in 2026 (93 days remaining)

Good
104 Days
Moderate
99 Days
Poor
63 Days
Unhealthy
6 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 38%

Health Risk Level:

High

In 2026, 38% of 272 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

Hefei, Anhui, China

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
59AQI (US)
2nd January 2026
131AQI (US)
3rd January 2026
148AQI (US)
4th January 2026
154AQI (US)
5th January 2026
146AQI (US)
6th January 2026
121AQI (US)
7th January 2026
73AQI (US)
8th January 2026
110AQI (US)
9th January 2026
118AQI (US)
10th January 2026
111AQI (US)
11th January 2026
72AQI (US)
12th January 2026
93AQI (US)
13th January 2026
141AQI (US)
14th January 2026
132AQI (US)
15th January 2026
133AQI (US)
16th January 2026
142AQI (US)
17th January 2026
175AQI (US)
18th January 2026
159AQI (US)
19th January 2026
52AQI (US)
20th January 2026
80AQI (US)
21st January 2026
102AQI (US)
22nd January 2026
81AQI (US)
23rd January 2026
127AQI (US)
24th January 2026
151AQI (US)
25th January 2026
159AQI (US)
26th January 2026
115AQI (US)
27th January 2026
81AQI (US)
28th January 2026
134AQI (US)
29th January 2026
132AQI (US)
30th January 2026
66AQI (US)
31st January 2026
66AQI (US)
1st February 2026
81AQI (US)
2nd February 2026
95AQI (US)
3rd February 2026
146AQI (US)
4th February 2026
135AQI (US)
5th February 2026
134AQI (US)
6th February 2026
92AQI (US)
7th February 2026
60AQI (US)
8th February 2026
85AQI (US)
9th February 2026
71AQI (US)
10th February 2026
96AQI (US)
11th February 2026
108AQI (US)
12th February 2026
138AQI (US)
13th February 2026
120AQI (US)
14th February 2026
124AQI (US)
15th February 2026
118AQI (US)
16th February 2026
51AQI (US)
17th February 2026
144AQI (US)
18th February 2026
116AQI (US)
19th February 2026
123AQI (US)
20th February 2026
105AQI (US)
21st February 2026
69AQI (US)
22nd February 2026
72AQI (US)
23rd February 2026
80AQI (US)
24th February 2026
52AQI (US)
25th February 2026
69AQI (US)
26th February 2026
57AQI (US)
27th February 2026
46AQI (US)
28th February 2026
69AQI (US)
1st March 2026
61AQI (US)
2nd March 2026
27AQI (US)
3rd March 2026
106AQI (US)
4th March 2026
108AQI (US)
5th March 2026
104AQI (US)
6th March 2026
108AQI (US)
7th March 2026
97AQI (US)
8th March 2026
111AQI (US)
9th March 2026
132AQI (US)
10th March 2026
141AQI (US)
11th March 2026
116AQI (US)
12th March 2026
133AQI (US)
13th March 2026
137AQI (US)
14th March 2026
118AQI (US)
15th March 2026
139AQI (US)
16th March 2026
91AQI (US)
17th March 2026
107AQI (US)
18th March 2026
88AQI (US)
19th March 2026
116AQI (US)
20th March 2026
153AQI (US)
21st March 2026
147AQI (US)
22nd March 2026
105AQI (US)
23rd March 2026
120AQI (US)
24th March 2026
108AQI (US)
25th March 2026
120AQI (US)
26th March 2026
124AQI (US)
27th March 2026
130AQI (US)
28th March 2026
92AQI (US)
29th March 2026
96AQI (US)
30th March 2026
80AQI (US)
31st March 2026
149AQI (US)
1st April 2026
130AQI (US)
2nd April 2026
98AQI (US)
3rd April 2026
79AQI (US)
4th April 2026
63AQI (US)
5th April 2026
72AQI (US)
6th April 2026
97AQI (US)
7th April 2026
65AQI (US)
8th April 2026
40AQI (US)
9th April 2026
64AQI (US)
10th April 2026
50AQI (US)
11th April 2026
99AQI (US)
12th April 2026
46AQI (US)
13th April 2026
47AQI (US)
14th April 2026
44AQI (US)
15th April 2026
78AQI (US)
16th April 2026
104AQI (US)
17th April 2026
103AQI (US)
18th April 2026
82AQI (US)
19th April 2026
75AQI (US)
20th April 2026
48AQI (US)
21st April 2026
58AQI (US)
22nd April 2026
17AQI (US)
23rd April 2026
17AQI (US)
24th April 2026
51AQI (US)
25th April 2026
59AQI (US)
26th April 2026
59AQI (US)
27th April 2026
78AQI (US)
28th April 2026
49AQI (US)
29th April 2026
36AQI (US)
30th April 2026
45AQI (US)
1st May 2026
42AQI (US)
2nd May 2026
58AQI (US)
3rd May 2026
48AQI (US)
4th May 2026
21AQI (US)
5th May 2026
39AQI (US)
6th May 2026
55AQI (US)
7th May 2026
78AQI (US)
8th May 2026
33AQI (US)
9th May 2026
44AQI (US)
10th May 2026
62AQI (US)
11th May 2026
70AQI (US)
12th May 2026
91AQI (US)
13th May 2026
117AQI (US)
14th May 2026
112AQI (US)
15th May 2026
35AQI (US)
16th May 2026
75AQI (US)
17th May 2026
62AQI (US)
18th May 2026
55AQI (US)
19th May 2026
52AQI (US)
20th May 2026
63AQI (US)
21st May 2026
69AQI (US)
22nd May 2026
79AQI (US)
23rd May 2026
72AQI (US)
24th May 2026
71AQI (US)
25th May 2026
66AQI (US)
26th May 2026
47AQI (US)
27th May 2026
33AQI (US)
28th May 2026
56AQI (US)
29th May 2026
78AQI (US)
30th May 2026
85AQI (US)
31st May 2026
86AQI (US)
1st June 2026
108AQI (US)
2nd June 2026
120AQI (US)
3rd June 2026
124AQI (US)
4th June 2026
97AQI (US)
5th June 2026
63AQI (US)
6th June 2026
40AQI (US)
7th June 2026
85AQI (US)
8th June 2026
54AQI (US)
9th June 2026
44AQI (US)
10th June 2026
41AQI (US)
11th June 2026
48AQI (US)
12th June 2026
71AQI (US)
13th June 2026
43AQI (US)
14th June 2026
42AQI (US)
15th June 2026
44AQI (US)
16th June 2026
43AQI (US)
17th June 2026
58AQI (US)
18th June 2026
84AQI (US)
19th June 2026
27AQI (US)
20th June 2026
14AQI (US)
21st June 2026
44AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
10AQI (US)
24th June 2026
21AQI (US)
25th June 2026
38AQI (US)
26th June 2026
57AQI (US)
27th June 2026
100AQI (US)
28th June 2026
106AQI (US)
29th June 2026
129AQI (US)
30th June 2026
34AQI (US)
1st July 2026
34AQI (US)
2nd July 2026
33AQI (US)
3rd July 2026
11AQI (US)
4th July 2026
24AQI (US)
5th July 2026
18AQI (US)
6th July 2026
19AQI (US)
7th July 2026
21AQI (US)
8th July 2026
23AQI (US)
9th July 2026
24AQI (US)
10th July 2026
28AQI (US)
11th July 2026
43AQI (US)
12th July 2026
20AQI (US)
13th July 2026
19AQI (US)
14th July 2026
49AQI (US)
15th July 2026
18AQI (US)
16th July 2026
17AQI (US)
17th July 2026
33AQI (US)
18th July 2026
50AQI (US)
19th July 2026
61AQI (US)
20th July 2026
15AQI (US)
21st July 2026
23AQI (US)
22nd July 2026
32AQI (US)
23rd July 2026
27AQI (US)
24th July 2026
30AQI (US)
25th July 2026
41AQI (US)
26th July 2026
66AQI (US)
27th July 2026
29AQI (US)
28th July 2026
33AQI (US)
29th July 2026
18AQI (US)
30th July 2026
26AQI (US)
31st July 2026
29AQI (US)
1st August 2026
29AQI (US)
2nd August 2026
39AQI (US)
3rd August 2026
37AQI (US)
4th August 2026
58AQI (US)
5th August 2026
76AQI (US)
6th August 2026
49AQI (US)
7th August 2026
37AQI (US)
8th August 2026
39AQI (US)
9th August 2026
46AQI (US)
10th August 2026
16AQI (US)
11th August 2026
23AQI (US)
12th August 2026
30AQI (US)
13th August 2026
31AQI (US)
14th August 2026
29AQI (US)
15th August 2026
38AQI (US)
16th August 2026
43AQI (US)
17th August 2026
33AQI (US)
18th August 2026
63AQI (US)
19th August 2026
69AQI (US)
20th August 2026
31AQI (US)
21st August 2026
30AQI (US)
22nd August 2026
29AQI (US)
23rd August 2026
31AQI (US)
24th August 2026
28AQI (US)
25th August 2026
32AQI (US)
26th August 2026
31AQI (US)
27th August 2026
58AQI (US)
28th August 2026
30AQI (US)
29th August 2026
31AQI (US)
30th August 2026
38AQI (US)
31st August 2026
57AQI (US)
1st September 2026
35AQI (US)
2nd September 2026
22AQI (US)
3rd September 2026
28AQI (US)
4th September 2026
31AQI (US)
5th September 2026
39AQI (US)
6th September 2026
35AQI (US)
7th September 2026
39AQI (US)
8th September 2026
52AQI (US)
9th September 2026
48AQI (US)
10th September 2026
51AQI (US)
11th September 2026
59AQI (US)
12th September 2026
55AQI (US)
13th September 2026
67AQI (US)
14th September 2026
83AQI (US)
15th September 2026
88AQI (US)
16th September 2026
82AQI (US)
17th September 2026
114AQI (US)
18th September 2026
53AQI (US)
19th September 2026
80AQI (US)
20th September 2026
70AQI (US)
21st September 2026
85AQI (US)
22nd September 2026
102AQI (US)
23rd September 2026
113AQI (US)
24th September 2026
96AQI (US)
25th September 2026
83AQI (US)
26th September 2026
39AQI (US)
27th September 2026
24AQI (US)
28th September 2026
23AQI (US)
29th September 2026
32AQI (US)
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

115AQI (US)

95AQI (US)

112AQI (US)

65AQI (US)

63AQI (US)

60AQI (US)

29AQI (US)

39AQI (US)

60AQI (US)

No. of days

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

202671AQI (US)

10
16
5
1
15
12
1
7
22
1
11
16
3
9
20
2
16
9
5
29
2
25
6
12
14
3
104
99
63
6

Highest AQI (US) recorded in

January

115AQI (US)

Lowest AQI (US) recorded in

July

29AQI (US)

202592AQI (US)

5
17
9
6
19
3
14
16
1
16
13
1
20
11
9
21
10
21
5
26
7
23
2
18
11
10
16
4
10
11
10
33
190
114
27
1

Highest AQI (US) recorded in

January

131AQI (US)

Lowest AQI (US) recorded in

August

54AQI (US)

202492AQI (US)

1
6
12
11
1
3
9
13
3
1
10
17
4
16
14
22
9
6
23
1
17
14
4
27
7
23
8
12
9
2
3
18
8
1
1
25
5
49
181
108
26
2

Highest AQI (US) recorded in

January

135AQI (US)

Lowest AQI (US) recorded in

July

50AQI (US)

202397AQI (US)

8
15
8
1
10
13
4
1
7
19
4
17
12
1
1
19
10
1
2
27
1
11
20
1
30
5
21
4
2
12
14
3
1
11
13
1
2
9
13
5
2
27
191
114
26
3

Highest AQI (US) recorded in

January

128AQI (US)

Lowest AQI (US) recorded in

July

56AQI (US)

202292AQI (US)

1
5
10
14
8
11
2
5
14
11
1
25
5
1
24
6
6
23
1
7
18
2
1
3
23
3
4
21
6
1
11
16
2
9
13
9
28
183
83
28

Highest AQI (US) recorded in

January

136AQI (US)

Lowest AQI (US) recorded in

July

57AQI (US)

202192AQI (US)

6
15
9
1
1
13
10
4
13
15
3
20
8
2
1
22
8
3
22
5
15
16
7
22
2
4
26
5
16
10
1
16
10
3
9
14
8
37
201
97
29
1

Highest AQI (US) recorded in

January

133AQI (US)

Lowest AQI (US) recorded in

July

51AQI (US)

202090AQI (US)

2
9
2
16
5
15
3
8
21
1
8
18
5
11
20
26
4
2
17
12
13
17
4
8
19
31
159
57
19

Highest AQI (US) recorded in

December

144AQI (US)

Lowest AQI (US) recorded in

August

61AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2023(Avg.)
97AQI (US)
Least Polluted Year Recorded
2026(Avg.)
71AQI (US)

Hefei's annual 2026 AQI (US) (71) shows an average percentage change of -23.2% (improved AQI (US)) compared to previous years: 2020 (90), 2021 (92), 2022 (92), 2023 (97), 2024 (92), 2025 (92).