Houston, Chester, Illinois, United States 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+
November Air Quality Analysis
Houston, Chester, Illinois, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
10th Nov 2021
66AQILowest AQI recorded on
6th Nov 2024
14AQISame Day Analysis (3rd November ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 29 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Nov - 4th Nov 2025
Houston, Chester, Illinois, United States
AQI
Day
Night
.
7 AM3rd Nov 2025
6 PM
6 AM4th Nov 2025
Day time
Avg. Highest Time
6AM4th Nov
49AQI
Avg. Lowest Time
12PM3rd Nov
17AQI
Night time
Avg. Highest Time
8PM3rd Nov
53AQI
Avg. Lowest Time
5PM3rd Nov
22AQI
In the last 24 hours,
Houston's AQI reached its highest point of 53 at 8 PM during the Night, while the lowest point, 17, was recorded at 12 PM during the Day between 3rd Nov and 4th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Houston, Chester, Illinois, United States
OctNov
05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th
Day
Night
5th Oct 2025507 AMAQI
5th Oct 2025508 AMAQI
5th Oct 2025529 AMAQI
5th Oct 20254810 AMAQI
5th Oct 20254611 AMAQI
5th Oct 20254412 PMAQI
5th Oct 2025421 PMAQI
5th Oct 2025482 PMAQI
5th Oct 2025463 PMAQI
5th Oct 2025454 PMAQI
5th Oct 2025445 PMAQI
5th Oct 2025486 PMAQI
5th Oct 2025567 PMAQI
5th Oct 2025608 PMAQI
5th Oct 2025489 PMAQI
5th Oct 20254710 PMAQI
5th Oct 20255011 PMAQI
6th Oct 20255112 AMAQI
6th Oct 2025471 AMAQI
6th Oct 2025422 AMAQI
6th Oct 2025393 AMAQI
6th Oct 2025424 AMAQI
6th Oct 2025455 AMAQI
6th Oct 2025466 AMAQI
22°C14/31°C
6th Oct 2025507 AMAQI
6th Oct 2025448 AMAQI
6th Oct 2025469 AMAQI
6th Oct 20255010 AMAQI
6th Oct 20254511 AMAQI
6th Oct 20256412 PMAQI
7th Oct 2025346 AMAQI
22°C18/28°C
7th Oct 2025437 AMAQI
7th Oct 2025398 AMAQI
7th Oct 2025399 AMAQI
7th Oct 20254210 AMAQI
7th Oct 20253911 AMAQI
7th Oct 20252512 PMAQI
7th Oct 2025301 PMAQI
7th Oct 2025392 PMAQI
7th Oct 2025413 PMAQI
7th Oct 2025254 PMAQI
7th Oct 2025295 PMAQI
7th Oct 2025376 PMAQI
7th Oct 2025417 PMAQI
7th Oct 2025398 PMAQI
7th Oct 2025249 PMAQI
7th Oct 20253910 PMAQI
7th Oct 20255711 PMAQI
8th Oct 20252712 AMAQI
8th Oct 2025431 AMAQI
8th Oct 2025652 AMAQI
8th Oct 2025263 AMAQI
8th Oct 2025154 AMAQI
8th Oct 2025135 AMAQI
8th Oct 2025136 AMAQI
23°C18/31°C
8th Oct 2025147 AMAQI
8th Oct 2025318 AMAQI
8th Oct 2025409 AMAQI
8th Oct 20254010 AMAQI
8th Oct 20254011 AMAQI
8th Oct 20256012 PMAQI
8th Oct 2025411 PMAQI
8th Oct 2025272 PMAQI
8th Oct 2025213 PMAQI
8th Oct 2025264 PMAQI
8th Oct 2025255 PMAQI
8th Oct 2025246 PMAQI
8th Oct 2025527 PMAQI
8th Oct 2025548 PMAQI
8th Oct 2025499 PMAQI
8th Oct 20255010 PMAQI
8th Oct 20256711 PMAQI
9th Oct 20254912 AMAQI
9th Oct 2025401 AMAQI
9th Oct 2025662 AMAQI
9th Oct 2025563 AMAQI
9th Oct 2025484 AMAQI
9th Oct 2025635 AMAQI
9th Oct 2025336 AMAQI
18°C12/27°C
9th Oct 2025227 AMAQI
9th Oct 2025228 AMAQI
9th Oct 2025339 AMAQI
9th Oct 20254110 AMAQI
9th Oct 20255211 AMAQI
9th Oct 20255112 PMAQI
9th Oct 2025551 PMAQI
9th Oct 2025542 PMAQI
9th Oct 2025433 PMAQI
9th Oct 2025374 PMAQI
9th Oct 2025345 PMAQI
9th Oct 2025286 PMAQI
9th Oct 2025297 PMAQI
9th Oct 2025348 PMAQI
9th Oct 2025419 PMAQI
9th Oct 20255410 PMAQI
9th Oct 20256211 PMAQI
10th Oct 20255612 AMAQI
10th Oct 2025571 AMAQI
10th Oct 2025572 AMAQI
10th Oct 2025503 AMAQI
10th Oct 2025464 AMAQI
10th Oct 2025455 AMAQI
10th Oct 2025506 AMAQI
16°C8/26°C
10th Oct 2025487 AMAQI
10th Oct 2025538 AMAQI
10th Oct 2025559 AMAQI
10th Oct 20257410 AMAQI
10th Oct 20257811 AMAQI
10th Oct 20256912 PMAQI
10th Oct 2025661 PMAQI
10th Oct 2025632 PMAQI
10th Oct 2025563 PMAQI
10th Oct 2025564 PMAQI
10th Oct 2025395 PMAQI
10th Oct 2025376 PMAQI
10th Oct 2025547 PMAQI
10th Oct 2025448 PMAQI
10th Oct 2025529 PMAQI
10th Oct 20255610 PMAQI
10th Oct 20254811 PMAQI
11th Oct 20255112 AMAQI
11th Oct 2025511 AMAQI
11th Oct 2025412 AMAQI
11th Oct 2025353 AMAQI
11th Oct 2025264 AMAQI
11th Oct 2025205 AMAQI
11th Oct 2025376 AMAQI
16°C7/26°C
11th Oct 2025427 AMAQI
11th Oct 2025438 AMAQI
11th Oct 2025559 AMAQI
11th Oct 20255710 AMAQI
11th Oct 20256311 AMAQI
11th Oct 20254512 PMAQI
11th Oct 2025441 PMAQI
11th Oct 2025402 PMAQI
11th Oct 2025403 PMAQI
11th Oct 2025364 PMAQI
11th Oct 2025375 PMAQI
11th Oct 2025376 PMAQI
11th Oct 2025387 PMAQI
11th Oct 2025408 PMAQI
11th Oct 2025399 PMAQI
11th Oct 20253710 PMAQI
11th Oct 20254411 PMAQI
12th Oct 20254512 AMAQI
12th Oct 2025421 AMAQI
12th Oct 2025502 AMAQI
12th Oct 2025493 AMAQI
12th Oct 2025514 AMAQI
12th Oct 2025485 AMAQI
12th Oct 2025496 AMAQI
19°C13/28°C
12th Oct 2025497 AMAQI
12th Oct 2025478 AMAQI
12th Oct 2025469 AMAQI
12th Oct 20254510 AMAQI
12th Oct 20254311 AMAQI
12th Oct 20254512 PMAQI
12th Oct 2025431 PMAQI
12th Oct 2025412 PMAQI
12th Oct 2025393 PMAQI
12th Oct 2025404 PMAQI
12th Oct 2025395 PMAQI
12th Oct 2025386 PMAQI
12th Oct 2025457 PMAQI
12th Oct 2025468 PMAQI
12th Oct 2025509 PMAQI
12th Oct 20255410 PMAQI
12th Oct 20255211 PMAQI
13th Oct 20254512 AMAQI
13th Oct 2025461 AMAQI
13th Oct 2025392 AMAQI
13th Oct 2025443 AMAQI
13th Oct 2025444 AMAQI
13th Oct 2025435 AMAQI
13th Oct 2025446 AMAQI
19°C11/28°C
13th Oct 2025487 AMAQI
13th Oct 2025688 AMAQI
13th Oct 20251019 AMAQI
13th Oct 20257810 AMAQI
13th Oct 20257411 AMAQI
13th Oct 20257512 PMAQI
13th Oct 2025711 PMAQI
13th Oct 2025662 PMAQI
13th Oct 2025743 PMAQI
13th Oct 2025554 PMAQI
13th Oct 2025555 PMAQI
13th Oct 2025536 PMAQI
13th Oct 2025577 PMAQI
13th Oct 2025568 PMAQI
13th Oct 2025609 PMAQI
13th Oct 20256010 PMAQI
13th Oct 20256411 PMAQI
14th Oct 20257412 AMAQI
14th Oct 2025701 AMAQI
14th Oct 2025672 AMAQI
14th Oct 2025613 AMAQI
14th Oct 2025614 AMAQI
14th Oct 2025575 AMAQI
14th Oct 2025606 AMAQI
20°C12/29°C
14th Oct 2025577 AMAQI
14th Oct 2025568 AMAQI
14th Oct 2025819 AMAQI
14th Oct 202511310 AMAQI
14th Oct 202510911 AMAQI
14th Oct 20259012 PMAQI
14th Oct 2025681 PMAQI
14th Oct 2025552 PMAQI
14th Oct 2025483 PMAQI
14th Oct 2025504 PMAQI
14th Oct 2025445 PMAQI
14th Oct 2025476 PMAQI
14th Oct 2025437 PMAQI
14th Oct 2025458 PMAQI
14th Oct 2025519 PMAQI
14th Oct 20255610 PMAQI
14th Oct 20255711 PMAQI
15th Oct 20257012 AMAQI
15th Oct 2025731 AMAQI
15th Oct 2025592 AMAQI
15th Oct 2025563 AMAQI
15th Oct 2025564 AMAQI
15th Oct 2025565 AMAQI
15th Oct 2025486 AMAQI
22°C14/31°C
15th Oct 2025477 AMAQI
15th Oct 2025488 AMAQI
15th Oct 2025639 AMAQI
15th Oct 20258410 AMAQI
15th Oct 202513111 AMAQI
15th Oct 202511312 PMAQI
15th Oct 2025911 PMAQI
15th Oct 2025662 PMAQI
15th Oct 2025543 PMAQI
15th Oct 2025514 PMAQI
15th Oct 2025535 PMAQI
15th Oct 2025546 PMAQI
15th Oct 2025567 PMAQI
15th Oct 2025588 PMAQI
15th Oct 2025609 PMAQI
15th Oct 20257210 PMAQI
15th Oct 20257011 PMAQI
16th Oct 20257012 AMAQI
16th Oct 2025681 AMAQI
16th Oct 2025602 AMAQI
16th Oct 2025593 AMAQI
16th Oct 2025574 AMAQI
16th Oct 2025565 AMAQI
16th Oct 2025556 AMAQI
22°C13/31°C
16th Oct 2025567 AMAQI
16th Oct 2025558 AMAQI
16th Oct 2025649 AMAQI
16th Oct 20256310 AMAQI
16th Oct 20256811 AMAQI
16th Oct 20257412 PMAQI
16th Oct 2025661 PMAQI
16th Oct 2025672 PMAQI
16th Oct 2025593 PMAQI
16th Oct 2025574 PMAQI
16th Oct 2025605 PMAQI
16th Oct 2025616 PMAQI
16th Oct 2025587 PMAQI
16th Oct 2025588 PMAQI
16th Oct 2025569 PMAQI
16th Oct 20255910 PMAQI
16th Oct 20255811 PMAQI
17th Oct 20255712 AMAQI
17th Oct 2025571 AMAQI
17th Oct 2025572 AMAQI
17th Oct 2025563 AMAQI
17th Oct 2025554 AMAQI
17th Oct 2025515 AMAQI
17th Oct 2025466 AMAQI
22°C15/29°C
17th Oct 2025467 AMAQI
17th Oct 2025438 AMAQI
17th Oct 2025449 AMAQI
17th Oct 20255510 AMAQI
17th Oct 20255011 AMAQI
17th Oct 20254912 PMAQI
17th Oct 2025561 PMAQI
17th Oct 2025512 PMAQI
17th Oct 2025463 PMAQI
17th Oct 2025464 PMAQI
17th Oct 2025515 PMAQI
17th Oct 2025496 PMAQI
17th Oct 2025567 PMAQI
17th Oct 2025498 PMAQI
17th Oct 2025549 PMAQI
17th Oct 20255810 PMAQI
17th Oct 20257411 PMAQI
18th Oct 20257512 AMAQI
18th Oct 2025631 AMAQI
18th Oct 2025572 AMAQI
18th Oct 2025583 AMAQI
18th Oct 2025644 AMAQI
18th Oct 2025655 AMAQI
18th Oct 2025736 AMAQI
22°C15/29°C
18th Oct 2025787 AMAQI
18th Oct 2025818 AMAQI
18th Oct 2025809 AMAQI
18th Oct 20258110 AMAQI
18th Oct 20257911 AMAQI
18th Oct 20257412 PMAQI
18th Oct 2025751 PMAQI
18th Oct 2025762 PMAQI
18th Oct 2025613 PMAQI
18th Oct 2025604 PMAQI
18th Oct 2025435 PMAQI
18th Oct 2025266 PMAQI
18th Oct 2025277 PMAQI
18th Oct 2025328 PMAQI
18th Oct 2025309 PMAQI
18th Oct 20251610 PMAQI
18th Oct 20253511 PMAQI
19th Oct 20254312 AMAQI
19th Oct 2025121 AMAQI
19th Oct 2025122 AMAQI
19th Oct 2025153 AMAQI
19th Oct 2025144 AMAQI
19th Oct 2025155 AMAQI
19th Oct 2025326 AMAQI
22°C17/30°C
19th Oct 2025227 AMAQI
19th Oct 2025158 AMAQI
19th Oct 2025149 AMAQI
19th Oct 20251410 AMAQI
19th Oct 20252411 AMAQI
19th Oct 20252712 PMAQI
19th Oct 2025241 PMAQI
19th Oct 2025182 PMAQI
19th Oct 2025183 PMAQI
19th Oct 2025144 PMAQI
19th Oct 2025185 PMAQI
19th Oct 2025186 PMAQI
19th Oct 2025117 PMAQI
19th Oct 2025118 PMAQI
19th Oct 2025159 PMAQI
19th Oct 20251310 PMAQI
19th Oct 20251711 PMAQI
20th Oct 20251812 AMAQI
20th Oct 2025181 AMAQI
20th Oct 2025202 AMAQI
20th Oct 2025163 AMAQI
20th Oct 2025154 AMAQI
20th Oct 2025145 AMAQI
20th Oct 2025156 AMAQI
14°C9/18°C
20th Oct 2025147 AMAQI
20th Oct 2025158 AMAQI
20th Oct 2025189 AMAQI
20th Oct 20251710 AMAQI
20th Oct 20252111 AMAQI
20th Oct 20252212 PMAQI
20th Oct 2025241 PMAQI
20th Oct 2025272 PMAQI
20th Oct 2025293 PMAQI
20th Oct 2025264 PMAQI
20th Oct 2025355 PMAQI
20th Oct 2025296 PMAQI
20th Oct 2025357 PMAQI
20th Oct 2025348 PMAQI
20th Oct 2025249 PMAQI
20th Oct 20251710 PMAQI
20th Oct 20251611 PMAQI
21st Oct 20251712 AMAQI
21st Oct 2025171 AMAQI
21st Oct 2025252 AMAQI
21st Oct 2025283 AMAQI
21st Oct 2025304 AMAQI
21st Oct 2025295 AMAQI
21st Oct 2025246 AMAQI
14°C7/24°C
21st Oct 2025197 AMAQI
21st Oct 2025188 AMAQI
21st Oct 2025229 AMAQI
21st Oct 20252210 AMAQI
21st Oct 20252611 AMAQI
21st Oct 20252612 PMAQI
21st Oct 2025231 PMAQI
21st Oct 2025222 PMAQI
21st Oct 2025193 PMAQI
21st Oct 2025204 PMAQI
21st Oct 2025235 PMAQI
21st Oct 2025246 PMAQI
21st Oct 2025237 PMAQI
21st Oct 2025218 PMAQI
21st Oct 2025219 PMAQI
21st Oct 20252310 PMAQI
21st Oct 20252211 PMAQI
22nd Oct 20252312 AMAQI
22nd Oct 2025231 AMAQI
22nd Oct 2025232 AMAQI
22nd Oct 2025213 AMAQI
22nd Oct 2025204 AMAQI
22nd Oct 2025205 AMAQI
22nd Oct 2025206 AMAQI
15°C9/20°C
22nd Oct 2025197 AMAQI
22nd Oct 2025198 AMAQI
22nd Oct 2025189 AMAQI
22nd Oct 20251910 AMAQI
22nd Oct 20251911 AMAQI
22nd Oct 20252012 PMAQI
22nd Oct 2025191 PMAQI
22nd Oct 2025192 PMAQI
22nd Oct 2025193 PMAQI
22nd Oct 2025164 PMAQI
22nd Oct 2025175 PMAQI
22nd Oct 2025186 PMAQI
22nd Oct 2025167 PMAQI
22nd Oct 2025178 PMAQI
22nd Oct 2025179 PMAQI
22nd Oct 20251810 PMAQI
22nd Oct 20253711 PMAQI
23rd Oct 20253812 AMAQI
23rd Oct 2025531 AMAQI
23rd Oct 2025442 AMAQI
23rd Oct 2025283 AMAQI
23rd Oct 2025284 AMAQI
23rd Oct 2025295 AMAQI
23rd Oct 2025206 AMAQI
12°C6/20°C
23rd Oct 2025197 AMAQI
23rd Oct 2025198 AMAQI
23rd Oct 2025229 AMAQI
23rd Oct 20252610 AMAQI
23rd Oct 20252911 AMAQI
23rd Oct 20252812 PMAQI
23rd Oct 2025261 PMAQI
23rd Oct 2025202 PMAQI
23rd Oct 2025173 PMAQI
23rd Oct 2025174 PMAQI
23rd Oct 2025175 PMAQI
23rd Oct 2025176 PMAQI
23rd Oct 2025177 PMAQI
23rd Oct 2025178 PMAQI
23rd Oct 2025189 PMAQI
23rd Oct 20253010 PMAQI
23rd Oct 20253211 PMAQI
24th Oct 20254312 AMAQI
24th Oct 2025581 AMAQI
24th Oct 2025602 AMAQI
24th Oct 2025463 AMAQI
24th Oct 2025454 AMAQI
24th Oct 2025445 AMAQI
24th Oct 2025366 AMAQI
12°C4/20°C
24th Oct 2025247 AMAQI
24th Oct 2025248 AMAQI
24th Oct 2025269 AMAQI
24th Oct 20253010 AMAQI
24th Oct 20254211 AMAQI
24th Oct 20255712 PMAQI
24th Oct 2025601 PMAQI
24th Oct 2025362 PMAQI
24th Oct 2025303 PMAQI
24th Oct 2025184 PMAQI
24th Oct 2025215 PMAQI
24th Oct 2025306 PMAQI
24th Oct 2025317 PMAQI
24th Oct 2025408 PMAQI
24th Oct 2025429 PMAQI
24th Oct 20253010 PMAQI
24th Oct 20254211 PMAQI
25th Oct 20254412 AMAQI
25th Oct 2025301 AMAQI
25th Oct 2025322 AMAQI
25th Oct 2025313 AMAQI
25th Oct 2025294 AMAQI
25th Oct 2025295 AMAQI
25th Oct 2025266 AMAQI
12°C3/21°C
25th Oct 2025227 AMAQI
25th Oct 2025228 AMAQI
25th Oct 2025229 AMAQI
25th Oct 20252210 AMAQI
25th Oct 20252211 AMAQI
25th Oct 20252212 PMAQI
25th Oct 2025211 PMAQI
25th Oct 2025202 PMAQI
25th Oct 2025203 PMAQI
25th Oct 2025174 PMAQI
25th Oct 2025175 PMAQI
25th Oct 2025176 PMAQI
25th Oct 2025177 PMAQI
25th Oct 2025178 PMAQI
25th Oct 2025199 PMAQI
25th Oct 20252210 PMAQI
25th Oct 20252211 PMAQI
26th Oct 20252212 AMAQI
26th Oct 2025221 AMAQI
26th Oct 2025222 AMAQI
26th Oct 2025223 AMAQI
26th Oct 2025204 AMAQI
26th Oct 2025175 AMAQI
26th Oct 2025176 AMAQI
14°C11/19°C
26th Oct 2025187 AMAQI
26th Oct 2025228 AMAQI
26th Oct 2025229 AMAQI
26th Oct 20252210 AMAQI
26th Oct 20252211 AMAQI
26th Oct 20252212 PMAQI
26th Oct 2025221 PMAQI
26th Oct 2025222 PMAQI
26th Oct 2025223 PMAQI
26th Oct 2025224 PMAQI
26th Oct 2025245 PMAQI
26th Oct 2025266 PMAQI
26th Oct 2025227 PMAQI
26th Oct 2025228 PMAQI
26th Oct 2025229 PMAQI
26th Oct 20252210 PMAQI
26th Oct 20252211 PMAQI
27th Oct 20252212 AMAQI
27th Oct 2025221 AMAQI
27th Oct 2025222 AMAQI
27th Oct 2025223 AMAQI
27th Oct 2025224 AMAQI
27th Oct 2025225 AMAQI
27th Oct 2025226 AMAQI
13°C11/16°C
27th Oct 2025227 AMAQI
27th Oct 2025228 AMAQI
27th Oct 2025229 AMAQI
27th Oct 20252210 AMAQI
27th Oct 20252211 AMAQI
27th Oct 20252212 PMAQI
27th Oct 2025221 PMAQI
27th Oct 2025202 PMAQI
27th Oct 2025173 PMAQI
27th Oct 2025174 PMAQI
27th Oct 2025195 PMAQI
27th Oct 2025226 PMAQI
27th Oct 2025247 PMAQI
27th Oct 2025308 PMAQI
27th Oct 2025339 PMAQI
27th Oct 20253510 PMAQI
27th Oct 20254111 PMAQI
28th Oct 20254412 AMAQI
28th Oct 2025441 AMAQI
28th Oct 2025412 AMAQI
28th Oct 2025333 AMAQI
28th Oct 2025374 AMAQI
28th Oct 2025485 AMAQI
28th Oct 2025546 AMAQI
11°C10/12°C
28th Oct 2025537 AMAQI
28th Oct 2025538 AMAQI
28th Oct 2025529 AMAQI
28th Oct 20255010 AMAQI
28th Oct 20255111 AMAQI
28th Oct 20254912 PMAQI
28th Oct 2025391 PMAQI
28th Oct 2025262 PMAQI
28th Oct 2025203 PMAQI
28th Oct 2025174 PMAQI
28th Oct 2025175 PMAQI
28th Oct 2025176 PMAQI
28th Oct 2025177 PMAQI
28th Oct 2025158 PMAQI
28th Oct 2025119 PMAQI
28th Oct 20251310 PMAQI
28th Oct 20251711 PMAQI
29th Oct 20251912 AMAQI
29th Oct 2025271 AMAQI
29th Oct 2025232 AMAQI
29th Oct 2025223 AMAQI
29th Oct 2025204 AMAQI
29th Oct 2025175 AMAQI
29th Oct 2025176 AMAQI
12°C11/14°C
29th Oct 2025157 AMAQI
29th Oct 2025128 AMAQI
29th Oct 2025169 AMAQI
29th Oct 20251410 AMAQI
29th Oct 20252211 AMAQI
29th Oct 20251412 PMAQI
29th Oct 2025171 PMAQI
29th Oct 2025222 PMAQI
29th Oct 2025223 PMAQI
29th Oct 2025204 PMAQI
29th Oct 2025175 PMAQI
29th Oct 2025176 PMAQI
29th Oct 2025187 PMAQI
29th Oct 2025228 PMAQI
29th Oct 2025229 PMAQI
29th Oct 20252210 PMAQI
29th Oct 20252211 PMAQI
30th Oct 20252212 AMAQI
30th Oct 2025221 AMAQI
30th Oct 2025222 AMAQI
30th Oct 2025223 AMAQI
30th Oct 2025224 AMAQI
30th Oct 2025225 AMAQI
30th Oct 2025246 AMAQI
12°C9/13°C
30th Oct 2025287 AMAQI
30th Oct 2025308 AMAQI
30th Oct 2025359 AMAQI
30th Oct 20253910 AMAQI
30th Oct 20253711 AMAQI
30th Oct 20253312 PMAQI
30th Oct 2025321 PMAQI
30th Oct 2025282 PMAQI
30th Oct 2025283 PMAQI
30th Oct 2025264 PMAQI
30th Oct 2025225 PMAQI
30th Oct 2025226 PMAQI
30th Oct 2025187 PMAQI
30th Oct 2025178 PMAQI
30th Oct 2025179 PMAQI
30th Oct 20251810 PMAQI
30th Oct 20252211 PMAQI
31st Oct 20252712 AMAQI
31st Oct 2025281 AMAQI
31st Oct 2025232 AMAQI
31st Oct 2025273 AMAQI
31st Oct 2025284 AMAQI
31st Oct 2025285 AMAQI
31st Oct 2025266 AMAQI
9°C5/11°C
31st Oct 2025227 AMAQI
31st Oct 2025278 AMAQI
31st Oct 2025289 AMAQI
31st Oct 20252810 AMAQI
31st Oct 20253211 AMAQI
31st Oct 20254112 PMAQI
31st Oct 2025441 PMAQI
31st Oct 2025442 PMAQI
31st Oct 2025423 PMAQI
31st Oct 2025374 PMAQI
31st Oct 2025205 PMAQI
31st Oct 2025156 PMAQI
31st Oct 2025127 PMAQI
31st Oct 2025118 PMAQI
31st Oct 2025119 PMAQI
31st Oct 20251110 PMAQI
31st Oct 20251311 PMAQI
1st Nov 20251812 AMAQI
1st Nov 2025191 AMAQI
1st Nov 2025182 AMAQI
1st Nov 2025223 AMAQI
1st Nov 2025224 AMAQI
1st Nov 2025245 AMAQI
1st Nov 2025266 AMAQI
10°C4/17°C
1st Nov 2025227 AMAQI
1st Nov 2025228 AMAQI
1st Nov 2025229 AMAQI
1st Nov 20252210 AMAQI
1st Nov 20252211 AMAQI
1st Nov 20252212 PMAQI
1st Nov 2025221 PMAQI
1st Nov 2025202 PMAQI
1st Nov 2025173 PMAQI
1st Nov 2025234 PMAQI
1st Nov 2025275 PMAQI
1st Nov 2025156 PMAQI
1st Nov 2025137 PMAQI
1st Nov 2025158 PMAQI
1st Nov 2025139 PMAQI
1st Nov 20251710 PMAQI
1st Nov 20251711 PMAQI
2nd Nov 20251712 AMAQI
2nd Nov 2025181 AMAQI
2nd Nov 2025222 AMAQI
2nd Nov 2025223 AMAQI
2nd Nov 2025184 AMAQI
2nd Nov 2025225 AMAQI
2nd Nov 2025226 AMAQI
9°C7/14°C
2nd Nov 2025277 AMAQI
2nd Nov 2025288 AMAQI
2nd Nov 2025289 AMAQI
2nd Nov 20252810 AMAQI
2nd Nov 20252811 AMAQI
2nd Nov 20252812 PMAQI
2nd Nov 2025281 PMAQI
2nd Nov 2025222 PMAQI
2nd Nov 2025223 PMAQI
2nd Nov 2025274 PMAQI
2nd Nov 2025285 PMAQI
2nd Nov 2025286 PMAQI
2nd Nov 2025227 PMAQI
2nd Nov 2025288 PMAQI
2nd Nov 2025539 PMAQI
2nd Nov 20257110 PMAQI
2nd Nov 20255511 PMAQI
3rd Nov 20254612 AMAQI
3rd Nov 2025331 AMAQI
3rd Nov 2025332 AMAQI
3rd Nov 2025283 AMAQI
3rd Nov 2025224 AMAQI
3rd Nov 2025225 AMAQI
3rd Nov 2025226 AMAQI
7°C2/13°C
3rd Nov 2025227 AMAQI
3rd Nov 2025228 AMAQI
3rd Nov 2025229 AMAQI
3rd Nov 20252010 AMAQI
3rd Nov 20251811 AMAQI
3rd Nov 20251712 PMAQI
3rd Nov 2025181 PMAQI
3rd Nov 2025272 PMAQI
3rd Nov 2025283 PMAQI
3rd Nov 2025234 PMAQI
3rd Nov 2025225 PMAQI
3rd Nov 2025276 PMAQI
3rd Nov 2025237 PMAQI
3rd Nov 2025538 PMAQI
3rd Nov 2025419 PMAQI
3rd Nov 20253910 PMAQI
3rd Nov 20253511 PMAQI
4th Nov 20253712 AMAQI
4th Nov 2025391 AMAQI
4th Nov 2025492 AMAQI
4th Nov 2025493 AMAQI
4th Nov 2025494 AMAQI
4th Nov 2025485 AMAQI
4th Nov 2025496 AMAQI
10°C4/19°C
4th Nov 2025427 AMAQI
7 AM4th Nov 2025488 AMAQI
4th Nov 2025489 AMAQI
4th Nov 20253910 AMAQI
4th Nov 20253211 AMAQI
4th Nov 20253712 PMAQI
12 PM4th Nov 2025371 PMAQI
6 PM
12 AM
6 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 12 PM
45AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
6 PM
30AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 12 PM (Avg. 45), while the lowest AQI was between 6 PM to 6 PM (Avg. 30).
Night time
Avg. Highest Time
12 AM - 2 AM
40AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
7 PM
32AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 2 AM (Avg. 40), while the lowest AQI was between 7 PM to 7 PM (Avg. 32).
2025 Days Vs Air Quality
Houston, Chester, Illinois, United States
2025
79%
243
21%
63
0.3%
1
Total number of days with different AQI categories in last 308 days in 2025 (57 days remaining)
Good
243 DaysModerate
63 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 308 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Houston, Chester, Illinois, United States
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
22AQI
22AQI
2nd January 2025
25AQI
25AQI
3rd January 2025
24AQI
24AQI
4th January 2025
20AQI
20AQI
5th January 2025
20AQI
20AQI
6th January 2025
20AQI
20AQI
7th January 2025
24AQI
24AQI
8th January 2025
42AQI
42AQI
9th January 2025
54AQI
54AQI
10th January 2025
54AQI
54AQI
11th January 2025
35AQI
35AQI
12th January 2025
31AQI
31AQI
13th January 2025
23AQI
23AQI
14th January 2025
26AQI
26AQI
15th January 2025
33AQI
33AQI
16th January 2025
30AQI
30AQI
17th January 2025
27AQI
27AQI
18th January 2025
20AQI
20AQI
19th January 2025
19AQI
19AQI
20th January 2025
20AQI
20AQI
21st January 2025
22AQI
22AQI
22nd January 2025
25AQI
25AQI
23rd January 2025
26AQI
26AQI
24th January 2025
30AQI
30AQI
25th January 2025
28AQI
28AQI
26th January 2025
27AQI
27AQI
27th January 2025
22AQI
22AQI
28th January 2025
23AQI
23AQI
29th January 2025
24AQI
24AQI
30th January 2025
30AQI
30AQI
31st January 2025
21AQI
21AQI
1st February 2025
31AQI
31AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
33AQI
33AQI
4th February 2025
29AQI
29AQI
5th February 2025
29AQI
29AQI
6th February 2025
26AQI
26AQI
7th February 2025
25AQI
25AQI
8th February 2025
32AQI
32AQI
9th February 2025
35AQI
35AQI
10th February 2025
33AQI
33AQI
11th February 2025
30AQI
30AQI
12th February 2025
42AQI
42AQI
13th February 2025
30AQI
30AQI
14th February 2025
26AQI
26AQI
15th February 2025
23AQI
23AQI
16th February 2025
40AQI
40AQI
17th February 2025
20AQI
20AQI
18th February 2025
22AQI
22AQI
19th February 2025
21AQI
21AQI
20th February 2025
22AQI
22AQI
21st February 2025
30AQI
30AQI
22nd February 2025
37AQI
37AQI
23rd February 2025
32AQI
32AQI
24th February 2025
28AQI
28AQI
25th February 2025
28AQI
28AQI
26th February 2025
26AQI
26AQI
27th February 2025
30AQI
30AQI
28th February 2025
28AQI
28AQI
1st March 2025
27AQI
27AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
32AQI
32AQI
4th March 2025
42AQI
42AQI
5th March 2025
26AQI
26AQI
6th March 2025
27AQI
27AQI
7th March 2025
28AQI
28AQI
8th March 2025
33AQI
33AQI
9th March 2025
40AQI
40AQI
10th March 2025
46AQI
46AQI
11th March 2025
56AQI
56AQI
12th March 2025
55AQI
55AQI
13th March 2025
67AQI
67AQI
14th March 2025
50AQI
50AQI
15th March 2025
117AQI
117AQI
16th March 2025
29AQI
29AQI
17th March 2025
32AQI
32AQI
18th March 2025
25AQI
25AQI
19th March 2025
31AQI
31AQI
20th March 2025
19AQI
19AQI
21st March 2025
27AQI
27AQI
22nd March 2025
21AQI
21AQI
23rd March 2025
26AQI
26AQI
24th March 2025
19AQI
19AQI
25th March 2025
20AQI
20AQI
26th March 2025
33AQI
33AQI
27th March 2025
46AQI
46AQI
28th March 2025
45AQI
45AQI
29th March 2025
47AQI
47AQI
30th March 2025
32AQI
32AQI
31st March 2025
20AQI
20AQI
1st April 2025
28AQI
28AQI
2nd April 2025
31AQI
31AQI
3rd April 2025
25AQI
25AQI
4th April 2025
22AQI
22AQI
5th April 2025
18AQI
18AQI
6th April 2025
23AQI
23AQI
7th April 2025
26AQI
26AQI
8th April 2025
18AQI
18AQI
9th April 2025
22AQI
22AQI
10th April 2025
40AQI
40AQI
11th April 2025
39AQI
39AQI
12th April 2025
44AQI
44AQI
13th April 2025
43AQI
43AQI
14th April 2025
41AQI
41AQI
15th April 2025
23AQI
23AQI
16th April 2025
28AQI
28AQI
17th April 2025
45AQI
45AQI
18th April 2025
60AQI
60AQI
19th April 2025
40AQI
40AQI
20th April 2025
49AQI
49AQI
21st April 2025
21AQI
21AQI
22nd April 2025
26AQI
26AQI
23rd April 2025
32AQI
32AQI
24th April 2025
41AQI
41AQI
25th April 2025
40AQI
40AQI
26th April 2025
34AQI
34AQI
27th April 2025
24AQI
24AQI
28th April 2025
37AQI
37AQI
29th April 2025
41AQI
41AQI
30th April 2025
38AQI
38AQI
1st May 2025
27AQI
27AQI
2nd May 2025
27AQI
27AQI
3rd May 2025
30AQI
30AQI
4th May 2025
22AQI
22AQI
5th May 2025
19AQI
19AQI
6th May 2025
26AQI
26AQI
7th May 2025
23AQI
23AQI
8th May 2025
27AQI
27AQI
9th May 2025
25AQI
25AQI
10th May 2025
26AQI
26AQI
11th May 2025
32AQI
32AQI
12th May 2025
25AQI
25AQI
13th May 2025
22AQI
22AQI
14th May 2025
41AQI
41AQI
15th May 2025
54AQI
54AQI
16th May 2025
54AQI
54AQI
17th May 2025
27AQI
27AQI
18th May 2025
22AQI
22AQI
19th May 2025
29AQI
29AQI
20th May 2025
29AQI
29AQI
21st May 2025
16AQI
16AQI
22nd May 2025
14AQI
14AQI
23rd May 2025
17AQI
17AQI
24th May 2025
29AQI
29AQI
25th May 2025
34AQI
34AQI
26th May 2025
22AQI
22AQI
27th May 2025
21AQI
21AQI
28th May 2025
28AQI
28AQI
29th May 2025
37AQI
37AQI
30th May 2025
29AQI
29AQI
31st May 2025
41AQI
41AQI
1st June 2025
39AQI
39AQI
2nd June 2025
44AQI
44AQI
3rd June 2025
57AQI
57AQI
4th June 2025
61AQI
61AQI
5th June 2025
52AQI
52AQI
6th June 2025
47AQI
47AQI
7th June 2025
53AQI
53AQI
8th June 2025
53AQI
53AQI
9th June 2025
57AQI
57AQI
10th June 2025
61AQI
61AQI
11th June 2025
68AQI
68AQI
12th June 2025
79AQI
79AQI
13th June 2025
44AQI
44AQI
14th June 2025
38AQI
38AQI
15th June 2025
41AQI
41AQI
16th June 2025
28AQI
28AQI
17th June 2025
36AQI
36AQI
18th June 2025
34AQI
34AQI
19th June 2025
26AQI
26AQI
20th June 2025
38AQI
38AQI
21st June 2025
50AQI
50AQI
22nd June 2025
53AQI
53AQI
23rd June 2025
57AQI
57AQI
24th June 2025
55AQI
55AQI
25th June 2025
54AQI
54AQI
26th June 2025
52AQI
52AQI
27th June 2025
42AQI
42AQI
28th June 2025
28AQI
28AQI
29th June 2025
27AQI
27AQI
30th June 2025
29AQI
29AQI
1st July 2025
30AQI
30AQI
2nd July 2025
38AQI
38AQI
3rd July 2025
53AQI
53AQI
4th July 2025
60AQI
60AQI
5th July 2025
70AQI
70AQI
6th July 2025
59AQI
59AQI
7th July 2025
40AQI
40AQI
8th July 2025
39AQI
39AQI
9th July 2025
34AQI
34AQI
10th July 2025
42AQI
42AQI
11th July 2025
43AQI
43AQI
12th July 2025
40AQI
40AQI
13th July 2025
33AQI
33AQI
14th July 2025
33AQI
33AQI
15th July 2025
34AQI
34AQI
16th July 2025
34AQI
34AQI
17th July 2025
37AQI
37AQI
18th July 2025
31AQI
31AQI
19th July 2025
43AQI
43AQI
20th July 2025
52AQI
52AQI
21st July 2025
34AQI
34AQI
22nd July 2025
41AQI
41AQI
23rd July 2025
50AQI
50AQI
24th July 2025
54AQI
54AQI
25th July 2025
54AQI
54AQI
26th July 2025
44AQI
44AQI
27th July 2025
30AQI
30AQI
28th July 2025
36AQI
36AQI
29th July 2025
45AQI
45AQI
30th July 2025
46AQI
46AQI
31st July 2025
38AQI
38AQI
1st August 2025
89AQI
89AQI
2nd August 2025
78AQI
78AQI
3rd August 2025
51AQI
51AQI
4th August 2025
38AQI
38AQI
5th August 2025
40AQI
40AQI
6th August 2025
45AQI
45AQI
7th August 2025
50AQI
50AQI
8th August 2025
52AQI
52AQI
9th August 2025
49AQI
49AQI
10th August 2025
47AQI
47AQI
11th August 2025
44AQI
44AQI
12th August 2025
41AQI
41AQI
13th August 2025
38AQI
38AQI
14th August 2025
52AQI
52AQI
15th August 2025
53AQI
53AQI
16th August 2025
53AQI
53AQI
17th August 2025
53AQI
53AQI
18th August 2025
52AQI
52AQI
19th August 2025
51AQI
51AQI
20th August 2025
32AQI
32AQI
21st August 2025
22AQI
22AQI
22nd August 2025
26AQI
26AQI
23rd August 2025
36AQI
36AQI
24th August 2025
29AQI
29AQI
25th August 2025
25AQI
25AQI
26th August 2025
25AQI
25AQI
27th August 2025
30AQI
30AQI
28th August 2025
34AQI
34AQI
29th August 2025
42AQI
42AQI
30th August 2025
40AQI
40AQI
31st August 2025
32AQI
32AQI
1st September 2025
29AQI
29AQI
2nd September 2025
29AQI
29AQI
3rd September 2025
37AQI
37AQI
4th September 2025
59AQI
59AQI
5th September 2025
57AQI
57AQI
6th September 2025
33AQI
33AQI
7th September 2025
26AQI
26AQI
8th September 2025
25AQI
25AQI
9th September 2025
34AQI
34AQI
10th September 2025
48AQI
48AQI
11th September 2025
56AQI
56AQI
12th September 2025
59AQI
59AQI
13th September 2025
60AQI
60AQI
14th September 2025
57AQI
57AQI
15th September 2025
55AQI
55AQI
16th September 2025
59AQI
59AQI
17th September 2025
57AQI
57AQI
18th September 2025
56AQI
56AQI
19th September 2025
46AQI
46AQI
20th September 2025
51AQI
51AQI
21st September 2025
48AQI
48AQI
22nd September 2025
38AQI
38AQI
23rd September 2025
44AQI
44AQI
24th September 2025
37AQI
37AQI
25th September 2025
32AQI
32AQI
26th September 2025
30AQI
30AQI
27th September 2025
37AQI
37AQI
28th September 2025
34AQI
34AQI
29th September 2025
51AQI
51AQI
30th September 2025
58AQI
58AQI
1st October 2025
56AQI
56AQI
2nd October 2025
53AQI
53AQI
3rd October 2025
51AQI
51AQI
4th October 2025
62AQI
62AQI
5th October 2025
50AQI
50AQI
6th October 2025
44AQI
44AQI
7th October 2025
37AQI
37AQI
8th October 2025
37AQI
37AQI
9th October 2025
45AQI
45AQI
10th October 2025
54AQI
54AQI
11th October 2025
41AQI
41AQI
12th October 2025
46AQI
46AQI
13th October 2025
57AQI
57AQI
14th October 2025
63AQI
63AQI
15th October 2025
66AQI
66AQI
16th October 2025
61AQI
61AQI
17th October 2025
53AQI
53AQI
18th October 2025
56AQI
56AQI
19th October 2025
18AQI
18AQI
20th October 2025
22AQI
22AQI
21st October 2025
23AQI
23AQI
22nd October 2025
20AQI
20AQI
23rd October 2025
27AQI
27AQI
24th October 2025
40AQI
40AQI
25th October 2025
24AQI
24AQI
26th October 2025
22AQI
22AQI
27th October 2025
24AQI
24AQI
28th October 2025
33AQI
33AQI
29th October 2025
20AQI
20AQI
30th October 2025
24AQI
24AQI
31st October 2025
25AQI
25AQI
1st November 2025
20AQI
20AQI
2nd November 2025
28AQI
28AQI
3rd November 2025
29AQI
29AQI
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
27AQI
29AQI
37AQI
33AQI
28AQI
47AQI
42AQI
44AQI
45AQI
40AQI
26AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202537AQI
29
2
28
27
3
1
29
1
29
2
16
14
24
7
21
10
17
13
20
11
3
243
63
1
Highest AQI recorded in
June47AQI
Lowest AQI recorded in
November26AQI
202431AQI
30
1
26
3
31
30
31
28
1
29
2
29
2
30
27
4
30
31
352
13
Highest AQI recorded in
October37AQI
Lowest AQI recorded in
January24AQI
202338AQI
27
4
28
30
1
27
3
25
6
8
22
28
3
23
8
26
4
27
4
29
31
309
55
Highest AQI recorded in
June59AQI
Lowest AQI recorded in
December25AQI
202236AQI
27
4
21
30
1
17
27
4
25
5
19
4
2
28
1
27
4
26
4
23
8
272
35
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
September32AQI
202138AQI
28
2
17
5
24
4
27
3
29
2
23
5
16
15
24
7
21
4
29
2
17
3
27
4
282
56
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
October30AQI
202040AQI
10
3
17
3
18
24
4
2
27
4
30
1
27
2
27
2
1
25
3
21
8
226
30
3
Highest AQI recorded in
June48AQI
Lowest AQI recorded in
May32AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
40AQILeast Polluted Year Recorded
2024(Avg.)
31AQIHouston's annual 2025 AQI (37) shows an average percentage change of 2.7% (worsened AQI) compared to previous years: 2020 (40), 2021 (38), 2022 (36), 2023 (38), 2024 (31).
