Hartford, Connecticut, 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+
August Air Quality Analysis
Hartford, Connecticut, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2025
113AQILowest AQI recorded on
20th Aug 2021
12AQISame Day Analysis (6th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 84 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 6th Aug - 7th Aug 2025
Hartford, Connecticut, United States
AQI
Day
Night
.
5 AM6th Aug 2025
8 PM
4 AM7th Aug 2025
Day time
Avg. Highest Time
5AM6th Aug
89AQI
Avg. Lowest Time
6PM6th Aug
62AQI
Night time
Avg. Highest Time
9PM6th Aug
54AQI
Avg. Lowest Time
3AM7th Aug
46AQI
In the last 24 hours,
Hartford's AQI reached its highest point of 89 at 5 AM during the Day, while the lowest point, 46, was recorded at 3 AM during the Night between 6th Aug and 7th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Hartford, Connecticut, United States
JulAug
08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th
Day
Night
8th Jul 2025505 AMAQI
8th Jul 2025466 AMAQI
8th Jul 2025507 AMAQI
8th Jul 2025518 AMAQI
8th Jul 2025509 AMAQI
8th Jul 20254410 AMAQI
8th Jul 20254311 AMAQI
8th Jul 20253812 PMAQI
8th Jul 2025361 PMAQI
8th Jul 2025372 PMAQI
8th Jul 2025383 PMAQI
8th Jul 2025374 PMAQI
8th Jul 2025365 PMAQI
8th Jul 2025366 PMAQI
8th Jul 2025427 PMAQI
8th Jul 2025418 PMAQI
8th Jul 2025369 PMAQI
8th Jul 20253810 PMAQI
8th Jul 20253811 PMAQI
9th Jul 20253512 AMAQI
9th Jul 2025261 AMAQI
9th Jul 2025272 AMAQI
9th Jul 2025283 AMAQI
9th Jul 2025284 AMAQI
27°C23/34°C
9th Jul 2025285 AMAQI
9th Jul 2025286 AMAQI
9th Jul 2025327 AMAQI
9th Jul 2025328 AMAQI
9th Jul 2025319 AMAQI
9th Jul 20252910 AMAQI
9th Jul 20252911 AMAQI
9th Jul 20252812 PMAQI
9th Jul 2025261 PMAQI
9th Jul 2025252 PMAQI
9th Jul 2025253 PMAQI
9th Jul 2025274 PMAQI
9th Jul 2025265 PMAQI
9th Jul 2025286 PMAQI
9th Jul 2025287 PMAQI
9th Jul 2025308 PMAQI
9th Jul 2025309 PMAQI
9th Jul 20253210 PMAQI
9th Jul 20253411 PMAQI
10th Jul 20253612 AMAQI
10th Jul 2025391 AMAQI
10th Jul 2025422 AMAQI
10th Jul 2025433 AMAQI
10th Jul 2025394 AMAQI
26°C23/30°C
10th Jul 2025365 AMAQI
10th Jul 2025336 AMAQI
10th Jul 2025317 AMAQI
10th Jul 2025308 AMAQI
10th Jul 2025289 AMAQI
10th Jul 20252810 AMAQI
10th Jul 20252711 AMAQI
10th Jul 20252612 PMAQI
10th Jul 2025271 PMAQI
10th Jul 2025282 PMAQI
10th Jul 2025283 PMAQI
10th Jul 2025304 PMAQI
10th Jul 2025285 PMAQI
10th Jul 2025286 PMAQI
10th Jul 2025307 PMAQI
10th Jul 2025288 PMAQI
10th Jul 2025289 PMAQI
10th Jul 20252710 PMAQI
10th Jul 20252811 PMAQI
11th Jul 20252812 AMAQI
11th Jul 2025271 AMAQI
11th Jul 2025282 AMAQI
11th Jul 2025273 AMAQI
11th Jul 2025274 AMAQI
25°C21/29°C
11th Jul 2025285 AMAQI
11th Jul 2025306 AMAQI
11th Jul 2025337 AMAQI
11th Jul 2025348 AMAQI
11th Jul 2025369 AMAQI
11th Jul 20253810 AMAQI
11th Jul 20253811 AMAQI
11th Jul 20254012 PMAQI
11th Jul 2025421 PMAQI
11th Jul 2025442 PMAQI
11th Jul 2025433 PMAQI
11th Jul 2025424 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025386 PMAQI
11th Jul 2025377 PMAQI
11th Jul 2025368 PMAQI
11th Jul 2025349 PMAQI
11th Jul 20253610 PMAQI
11th Jul 20253711 PMAQI
12th Jul 20253412 AMAQI
12th Jul 2025331 AMAQI
12th Jul 2025312 AMAQI
12th Jul 2025283 AMAQI
12th Jul 2025294 AMAQI
24°C20/30°C
12th Jul 2025295 AMAQI
12th Jul 2025306 AMAQI
12th Jul 2025297 AMAQI
12th Jul 2025288 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20253410 AMAQI
12th Jul 20253511 AMAQI
12th Jul 20253512 PMAQI
12th Jul 2025371 PMAQI
12th Jul 2025352 PMAQI
12th Jul 2025323 PMAQI
12th Jul 2025294 PMAQI
12th Jul 2025275 PMAQI
12th Jul 2025286 PMAQI
12th Jul 2025307 PMAQI
12th Jul 2025318 PMAQI
12th Jul 2025289 PMAQI
12th Jul 20252510 PMAQI
12th Jul 20253011 PMAQI
13th Jul 20252612 AMAQI
13th Jul 2025221 AMAQI
13th Jul 2025222 AMAQI
13th Jul 2025233 AMAQI
13th Jul 2025164 AMAQI
23°C20/28°C
13th Jul 2025165 AMAQI
13th Jul 2025156 AMAQI
13th Jul 2025167 AMAQI
13th Jul 2025178 AMAQI
13th Jul 2025209 AMAQI
13th Jul 20252010 AMAQI
13th Jul 20251811 AMAQI
13th Jul 20251812 PMAQI
13th Jul 2025221 PMAQI
13th Jul 2025202 PMAQI
13th Jul 2025203 PMAQI
13th Jul 2025224 PMAQI
13th Jul 2025225 PMAQI
13th Jul 2025246 PMAQI
13th Jul 2025217 PMAQI
13th Jul 2025208 PMAQI
13th Jul 2025249 PMAQI
13th Jul 20252310 PMAQI
13th Jul 20252411 PMAQI
14th Jul 20252512 AMAQI
14th Jul 2025221 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025233 AMAQI
14th Jul 2025244 AMAQI
23°C19/28°C
14th Jul 2025245 AMAQI
14th Jul 2025246 AMAQI
14th Jul 2025257 AMAQI
14th Jul 2025268 AMAQI
14th Jul 2025269 AMAQI
14th Jul 20252610 AMAQI
14th Jul 20252611 AMAQI
14th Jul 20252812 PMAQI
14th Jul 2025301 PMAQI
14th Jul 2025332 PMAQI
14th Jul 2025333 PMAQI
14th Jul 2025334 PMAQI
14th Jul 2025315 PMAQI
14th Jul 2025356 PMAQI
14th Jul 2025307 PMAQI
14th Jul 2025298 PMAQI
14th Jul 2025389 PMAQI
14th Jul 20253810 PMAQI
14th Jul 20253711 PMAQI
15th Jul 20253512 AMAQI
15th Jul 2025321 AMAQI
15th Jul 2025312 AMAQI
15th Jul 2025303 AMAQI
15th Jul 2025294 AMAQI
23°C20/24°C
15th Jul 2025315 AMAQI
15th Jul 2025326 AMAQI
15th Jul 2025327 AMAQI
15th Jul 2025308 AMAQI
15th Jul 2025299 AMAQI
15th Jul 20252810 AMAQI
15th Jul 20253011 AMAQI
15th Jul 20253312 PMAQI
15th Jul 2025341 PMAQI
15th Jul 2025352 PMAQI
15th Jul 2025313 PMAQI
15th Jul 2025324 PMAQI
15th Jul 2025315 PMAQI
15th Jul 2025286 PMAQI
15th Jul 2025327 PMAQI
15th Jul 2025328 PMAQI
15th Jul 2025309 PMAQI
15th Jul 20252810 PMAQI
15th Jul 20252911 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025261 AMAQI
16th Jul 2025262 AMAQI
16th Jul 2025283 AMAQI
16th Jul 2025294 AMAQI
27°C22/34°C
16th Jul 2025325 AMAQI
16th Jul 2025336 AMAQI
16th Jul 2025347 AMAQI
16th Jul 2025388 AMAQI
16th Jul 2025389 AMAQI
16th Jul 20254010 AMAQI
16th Jul 20254211 AMAQI
16th Jul 20254012 PMAQI
16th Jul 2025401 PMAQI
16th Jul 2025402 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025394 PMAQI
16th Jul 2025405 PMAQI
16th Jul 2025406 PMAQI
16th Jul 2025407 PMAQI
16th Jul 2025408 PMAQI
16th Jul 2025429 PMAQI
16th Jul 20254210 PMAQI
16th Jul 20254011 PMAQI
17th Jul 20254012 AMAQI
17th Jul 2025391 AMAQI
17th Jul 2025422 AMAQI
17th Jul 2025433 AMAQI
17th Jul 2025464 AMAQI
27°C22/35°C
17th Jul 2025485 AMAQI
17th Jul 2025526 AMAQI
17th Jul 2025497 AMAQI
17th Jul 2025498 AMAQI
17th Jul 2025499 AMAQI
17th Jul 20254210 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253212 PMAQI
17th Jul 2025311 PMAQI
17th Jul 2025322 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025364 PMAQI
17th Jul 2025375 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025448 PMAQI
17th Jul 2025509 PMAQI
17th Jul 20254810 PMAQI
17th Jul 20254011 PMAQI
18th Jul 20253312 AMAQI
18th Jul 2025241 AMAQI
18th Jul 2025202 AMAQI
18th Jul 2025223 AMAQI
18th Jul 2025194 AMAQI
27°C23/33°C
18th Jul 2025195 AMAQI
18th Jul 2025186 AMAQI
18th Jul 2025177 AMAQI
18th Jul 2025148 AMAQI
18th Jul 2025139 AMAQI
18th Jul 20251310 AMAQI
18th Jul 20251311 AMAQI
18th Jul 20251412 PMAQI
18th Jul 2025141 PMAQI
18th Jul 2025162 PMAQI
18th Jul 2025173 PMAQI
18th Jul 2025174 PMAQI
18th Jul 2025175 PMAQI
18th Jul 2025176 PMAQI
18th Jul 2025167 PMAQI
18th Jul 2025178 PMAQI
18th Jul 2025189 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252311 PMAQI
19th Jul 20252412 AMAQI
19th Jul 2025271 AMAQI
19th Jul 2025262 AMAQI
19th Jul 2025263 AMAQI
19th Jul 2025264 AMAQI
25°C21/30°C
19th Jul 2025265 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025247 AMAQI
19th Jul 2025248 AMAQI
19th Jul 2025249 AMAQI
19th Jul 20252510 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252612 PMAQI
19th Jul 2025251 PMAQI
19th Jul 2025252 PMAQI
19th Jul 2025243 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025245 PMAQI
19th Jul 2025246 PMAQI
19th Jul 2025247 PMAQI
19th Jul 2025258 PMAQI
19th Jul 2025259 PMAQI
19th Jul 20252610 PMAQI
19th Jul 20252511 PMAQI
20th Jul 20252412 AMAQI
20th Jul 2025201 AMAQI
20th Jul 2025182 AMAQI
20th Jul 2025173 AMAQI
20th Jul 2025154 AMAQI
24°C14/32°C
20th Jul 2025165 AMAQI
20th Jul 2025176 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025228 AMAQI
20th Jul 2025249 AMAQI
20th Jul 20252410 AMAQI
20th Jul 20252411 AMAQI
20th Jul 20252612 PMAQI
20th Jul 2025271 PMAQI
20th Jul 2025282 PMAQI
20th Jul 2025303 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025325 PMAQI
20th Jul 2025316 PMAQI
20th Jul 2025257 PMAQI
20th Jul 2025268 PMAQI
20th Jul 2025349 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253411 PMAQI
21st Jul 20253512 AMAQI
21st Jul 2025341 AMAQI
21st Jul 2025322 AMAQI
21st Jul 2025303 AMAQI
21st Jul 2025304 AMAQI
26°C21/32°C
21st Jul 2025315 AMAQI
21st Jul 2025316 AMAQI
21st Jul 2025307 AMAQI
21st Jul 2025328 AMAQI
21st Jul 2025369 AMAQI
21st Jul 20254410 AMAQI
21st Jul 20255411 AMAQI
21st Jul 20256412 PMAQI
21st Jul 2025661 PMAQI
21st Jul 2025642 PMAQI
21st Jul 2025583 PMAQI
21st Jul 2025584 PMAQI
21st Jul 2025575 PMAQI
21st Jul 2025546 PMAQI
21st Jul 2025407 PMAQI
21st Jul 2025358 PMAQI
21st Jul 2025339 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253111 PMAQI
22nd Jul 20252912 AMAQI
22nd Jul 2025271 AMAQI
22nd Jul 2025242 AMAQI
22nd Jul 2025243 AMAQI
22nd Jul 2025224 AMAQI
24°C19/29°C
22nd Jul 2025225 AMAQI
22nd Jul 2025226 AMAQI
22nd Jul 2025237 AMAQI
22nd Jul 2025238 AMAQI
22nd Jul 2025229 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252111 AMAQI
22nd Jul 20252012 PMAQI
22nd Jul 2025191 PMAQI
22nd Jul 2025212 PMAQI
22nd Jul 2025213 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025195 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025227 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025219 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252811 PMAQI
23rd Jul 20252812 AMAQI
23rd Jul 2025281 AMAQI
23rd Jul 2025292 AMAQI
23rd Jul 2025293 AMAQI
23rd Jul 2025294 AMAQI
22°C15/28°C
23rd Jul 2025285 AMAQI
23rd Jul 2025286 AMAQI
23rd Jul 2025267 AMAQI
23rd Jul 2025278 AMAQI
23rd Jul 2025289 AMAQI
23rd Jul 20252910 AMAQI
23rd Jul 20253211 AMAQI
23rd Jul 20253412 PMAQI
23rd Jul 2025351 PMAQI
23rd Jul 2025352 PMAQI
23rd Jul 2025333 PMAQI
23rd Jul 2025344 PMAQI
23rd Jul 2025345 PMAQI
23rd Jul 2025366 PMAQI
23rd Jul 2025327 PMAQI
23rd Jul 2025328 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253010 PMAQI
23rd Jul 20253011 PMAQI
24th Jul 20252812 AMAQI
24th Jul 2025271 AMAQI
24th Jul 2025282 AMAQI
24th Jul 2025313 AMAQI
24th Jul 2025284 AMAQI
23°C17/29°C
24th Jul 2025245 AMAQI
24th Jul 2025256 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025278 AMAQI
24th Jul 2025279 AMAQI
24th Jul 20252910 AMAQI
24th Jul 20253611 AMAQI
24th Jul 20254212 PMAQI
24th Jul 2025451 PMAQI
24th Jul 2025472 PMAQI
24th Jul 2025463 PMAQI
24th Jul 2025484 PMAQI
24th Jul 2025465 PMAQI
24th Jul 2025446 PMAQI
24th Jul 2025347 PMAQI
24th Jul 2025338 PMAQI
24th Jul 2025409 PMAQI
24th Jul 20253710 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253312 AMAQI
25th Jul 2025341 AMAQI
25th Jul 2025352 AMAQI
25th Jul 2025383 AMAQI
25th Jul 2025434 AMAQI
26°C19/33°C
25th Jul 2025465 AMAQI
25th Jul 2025486 AMAQI
25th Jul 2025517 AMAQI
25th Jul 2025518 AMAQI
25th Jul 2025529 AMAQI
25th Jul 20255410 AMAQI
25th Jul 20255411 AMAQI
25th Jul 20255812 PMAQI
25th Jul 2025571 PMAQI
25th Jul 2025552 PMAQI
25th Jul 2025533 PMAQI
25th Jul 2025484 PMAQI
25th Jul 2025455 PMAQI
25th Jul 2025456 PMAQI
25th Jul 2025457 PMAQI
25th Jul 2025428 PMAQI
25th Jul 2025389 PMAQI
25th Jul 20253510 PMAQI
25th Jul 20253411 PMAQI
26th Jul 20253112 AMAQI
26th Jul 2025281 AMAQI
26th Jul 2025312 AMAQI
26th Jul 2025373 AMAQI
26th Jul 2025504 AMAQI
28°C22/36°C
26th Jul 2025565 AMAQI
26th Jul 2025596 AMAQI
26th Jul 2025617 AMAQI
26th Jul 2025678 AMAQI
26th Jul 2025899 AMAQI
26th Jul 202510910 AMAQI
26th Jul 202511111 AMAQI
26th Jul 202511412 PMAQI
26th Jul 20251111 PMAQI
26th Jul 20251042 PMAQI
26th Jul 2025943 PMAQI
26th Jul 2025844 PMAQI
26th Jul 2025895 PMAQI
26th Jul 2025866 PMAQI
26th Jul 2025807 PMAQI
26th Jul 2025768 PMAQI
26th Jul 2025889 PMAQI
26th Jul 20258510 PMAQI
26th Jul 20258811 PMAQI
27th Jul 20259012 AMAQI
27th Jul 20251001 AMAQI
27th Jul 20251052 AMAQI
27th Jul 20251073 AMAQI
27th Jul 20251004 AMAQI
26°C21/31°C
27th Jul 2025965 AMAQI
27th Jul 2025896 AMAQI
27th Jul 2025897 AMAQI
27th Jul 2025898 AMAQI
27th Jul 2025909 AMAQI
27th Jul 20258810 AMAQI
27th Jul 20259011 AMAQI
27th Jul 20258912 PMAQI
27th Jul 2025901 PMAQI
27th Jul 2025932 PMAQI
27th Jul 2025913 PMAQI
27th Jul 2025914 PMAQI
27th Jul 2025915 PMAQI
27th Jul 2025916 PMAQI
27th Jul 2025937 PMAQI
27th Jul 2025928 PMAQI
27th Jul 2025929 PMAQI
27th Jul 20258810 PMAQI
27th Jul 20258711 PMAQI
28th Jul 20258812 AMAQI
28th Jul 2025871 AMAQI
28th Jul 2025822 AMAQI
28th Jul 2025853 AMAQI
28th Jul 2025824 AMAQI
23°C19/25°C
28th Jul 2025815 AMAQI
28th Jul 2025756 AMAQI
28th Jul 2025727 AMAQI
28th Jul 2025708 AMAQI
28th Jul 2025689 AMAQI
28th Jul 20256210 AMAQI
28th Jul 20256111 AMAQI
28th Jul 20256112 PMAQI
28th Jul 2025601 PMAQI
28th Jul 2025622 PMAQI
28th Jul 2025643 PMAQI
28th Jul 2025644 PMAQI
28th Jul 2025645 PMAQI
28th Jul 2025656 PMAQI
28th Jul 2025667 PMAQI
28th Jul 2025648 PMAQI
28th Jul 2025629 PMAQI
28th Jul 20256310 PMAQI
28th Jul 20256311 PMAQI
29th Jul 20256212 AMAQI
29th Jul 2025601 AMAQI
29th Jul 2025592 AMAQI
29th Jul 2025583 AMAQI
29th Jul 2025584 AMAQI
26°C20/34°C
29th Jul 2025585 AMAQI
29th Jul 2025586 AMAQI
29th Jul 2025607 AMAQI
29th Jul 2025608 AMAQI
29th Jul 2025619 AMAQI
29th Jul 20256210 AMAQI
29th Jul 20256111 AMAQI
29th Jul 20256012 PMAQI
29th Jul 2025601 PMAQI
29th Jul 2025602 PMAQI
29th Jul 2025603 PMAQI
29th Jul 2025584 PMAQI
29th Jul 2025585 PMAQI
29th Jul 2025576 PMAQI
29th Jul 2025587 PMAQI
29th Jul 2025588 PMAQI
29th Jul 2025579 PMAQI
29th Jul 20255610 PMAQI
29th Jul 20255611 PMAQI
30th Jul 20255612 AMAQI
30th Jul 2025571 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025563 AMAQI
30th Jul 2025554 AMAQI
30°C21/38°C
30th Jul 2025555 AMAQI
30th Jul 2025556 AMAQI
30th Jul 2025557 AMAQI
30th Jul 2025548 AMAQI
30th Jul 2025539 AMAQI
30th Jul 20255410 AMAQI
30th Jul 20255411 AMAQI
30th Jul 20255412 PMAQI
30th Jul 2025541 PMAQI
30th Jul 2025532 PMAQI
30th Jul 2025533 PMAQI
30th Jul 2025534 PMAQI
30th Jul 2025535 PMAQI
30th Jul 2025536 PMAQI
30th Jul 2025537 PMAQI
30th Jul 2025538 PMAQI
30th Jul 2025529 PMAQI
30th Jul 20255310 PMAQI
30th Jul 20255311 PMAQI
31st Jul 20255212 AMAQI
31st Jul 2025481 AMAQI
31st Jul 2025462 AMAQI
31st Jul 2025453 AMAQI
31st Jul 2025464 AMAQI
29°C21/37°C
31st Jul 2025495 AMAQI
31st Jul 2025526 AMAQI
31st Jul 2025547 AMAQI
31st Jul 2025568 AMAQI
31st Jul 2025599 AMAQI
31st Jul 20256210 AMAQI
31st Jul 20256711 AMAQI
31st Jul 20257312 PMAQI
31st Jul 2025761 PMAQI
31st Jul 2025842 PMAQI
31st Jul 2025863 PMAQI
31st Jul 2025894 PMAQI
31st Jul 2025905 PMAQI
31st Jul 2025866 PMAQI
31st Jul 2025567 PMAQI
31st Jul 2025588 PMAQI
31st Jul 2025649 PMAQI
31st Jul 20256010 PMAQI
31st Jul 20256211 PMAQI
1st Aug 20256212 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025582 AMAQI
1st Aug 2025563 AMAQI
1st Aug 2025584 AMAQI
24°C19/30°C
1st Aug 2025575 AMAQI
1st Aug 2025566 AMAQI
1st Aug 2025567 AMAQI
1st Aug 2025588 AMAQI
1st Aug 2025589 AMAQI
1st Aug 20256210 AMAQI
1st Aug 20256511 AMAQI
1st Aug 20256512 PMAQI
1st Aug 2025671 PMAQI
1st Aug 2025662 PMAQI
1st Aug 2025613 PMAQI
1st Aug 2025614 PMAQI
1st Aug 2025625 PMAQI
1st Aug 2025616 PMAQI
1st Aug 2025607 PMAQI
1st Aug 2025608 PMAQI
1st Aug 2025559 PMAQI
1st Aug 20255510 PMAQI
1st Aug 20255411 PMAQI
2nd Aug 20255412 AMAQI
2nd Aug 2025551 AMAQI
2nd Aug 2025572 AMAQI
2nd Aug 2025553 AMAQI
2nd Aug 2025554 AMAQI
20°C16/25°C
2nd Aug 2025545 AMAQI
2nd Aug 2025546 AMAQI
2nd Aug 2025527 AMAQI
2nd Aug 2025468 AMAQI
2nd Aug 2025399 AMAQI
2nd Aug 20253210 AMAQI
2nd Aug 20252811 AMAQI
2nd Aug 20252412 PMAQI
2nd Aug 2025231 PMAQI
2nd Aug 2025212 PMAQI
2nd Aug 2025223 PMAQI
2nd Aug 2025234 PMAQI
2nd Aug 2025245 PMAQI
2nd Aug 2025256 PMAQI
2nd Aug 2025397 PMAQI
2nd Aug 2025388 PMAQI
2nd Aug 2025369 PMAQI
2nd Aug 20254010 PMAQI
2nd Aug 20254611 PMAQI
3rd Aug 20254912 AMAQI
3rd Aug 2025521 AMAQI
3rd Aug 2025512 AMAQI
3rd Aug 2025523 AMAQI
3rd Aug 2025514 AMAQI
21°C14/28°C
3rd Aug 2025475 AMAQI
3rd Aug 2025446 AMAQI
3rd Aug 2025427 AMAQI
3rd Aug 2025438 AMAQI
3rd Aug 2025479 AMAQI
3rd Aug 20255310 AMAQI
3rd Aug 20255911 AMAQI
3rd Aug 20256712 PMAQI
3rd Aug 2025741 PMAQI
3rd Aug 2025822 PMAQI
3rd Aug 2025843 PMAQI
3rd Aug 2025864 PMAQI
3rd Aug 2025855 PMAQI
3rd Aug 2025886 PMAQI
3rd Aug 2025537 PMAQI
3rd Aug 2025618 PMAQI
3rd Aug 2025669 PMAQI
3rd Aug 20255910 PMAQI
3rd Aug 20255611 PMAQI
4th Aug 20255412 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025552 AMAQI
4th Aug 2025523 AMAQI
4th Aug 2025534 AMAQI
22°C12/32°C
4th Aug 2025525 AMAQI
4th Aug 2025546 AMAQI
4th Aug 2025567 AMAQI
4th Aug 2025588 AMAQI
4th Aug 2025609 AMAQI
4th Aug 20256510 AMAQI
4th Aug 20257311 AMAQI
4th Aug 20258412 PMAQI
4th Aug 2025961 PMAQI
4th Aug 20251102 PMAQI
4th Aug 20251143 PMAQI
4th Aug 20251204 PMAQI
4th Aug 20251135 PMAQI
4th Aug 20251106 PMAQI
4th Aug 2025647 PMAQI
4th Aug 2025848 PMAQI
4th Aug 20251029 PMAQI
4th Aug 202510410 PMAQI
4th Aug 202511511 PMAQI
5th Aug 202512012 AMAQI
5th Aug 20251161 AMAQI
5th Aug 20251062 AMAQI
5th Aug 20251113 AMAQI
5th Aug 20251144 AMAQI
24°C14/33°C
5th Aug 20251135 AMAQI
5th Aug 20251106 AMAQI
5th Aug 20251087 AMAQI
5th Aug 20251148 AMAQI
5th Aug 20251189 AMAQI
5th Aug 202511710 AMAQI
5th Aug 202511611 AMAQI
5th Aug 202512412 PMAQI
5th Aug 20251201 PMAQI
5th Aug 20251292 PMAQI
5th Aug 20251173 PMAQI
5th Aug 20251244 PMAQI
5th Aug 20251245 PMAQI
5th Aug 20251236 PMAQI
5th Aug 20251067 PMAQI
5th Aug 20251048 PMAQI
5th Aug 20251119 PMAQI
5th Aug 202510010 PMAQI
5th Aug 20259611 PMAQI
6th Aug 20259412 AMAQI
6th Aug 2025911 AMAQI
6th Aug 2025892 AMAQI
6th Aug 2025903 AMAQI
6th Aug 2025884 AMAQI
24°C17/30°C
6th Aug 2025895 AMAQI
6th Aug 2025846 AMAQI
6th Aug 2025827 AMAQI
6th Aug 2025828 AMAQI
6th Aug 2025839 AMAQI
6th Aug 20258510 AMAQI
6th Aug 20258211 AMAQI
6th Aug 20258212 PMAQI
6th Aug 2025771 PMAQI
6th Aug 2025762 PMAQI
6th Aug 2025723 PMAQI
6th Aug 2025704 PMAQI
6th Aug 2025645 PMAQI
6th Aug 2025626 PMAQI
6th Aug 2025867 PMAQI
6th Aug 2025678 PMAQI
6th Aug 2025549 PMAQI
6th Aug 20255410 PMAQI
6th Aug 20255011 PMAQI
7th Aug 20255212 AMAQI
7th Aug 2025491 AMAQI
7th Aug 2025472 AMAQI
7th Aug 2025463 AMAQI
7th Aug 2025494 AMAQI
24°C18/31°C
5 AM
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 6 PM
48AQI
14 hours / Day
420 hours / Month
Avg. Lowest Time
5 AM - 8 PM
48AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 6 PM (Avg. 48), while the lowest AQI was between 5 AM to 8 PM (Avg. 48).
Night time
Avg. Highest Time
12 AM - 11 PM
46AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
46AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 46), while the lowest AQI was between 12 AM to 11 PM (Avg. 46).
2025 Days Vs Air Quality
Hartford, Connecticut, United States
2025
83%
182
16%
35
0.4%
1
Total number of days with different AQI categories in last 219 days in 2025 (146 days remaining)
Good
182 DaysModerate
35 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 219 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
Hartford, Connecticut, 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.
1st January 2025
23AQI
23AQI
2nd January 2025
20AQI
20AQI
3rd January 2025
19AQI
19AQI
4th January 2025
19AQI
19AQI
5th January 2025
18AQI
18AQI
6th January 2025
17AQI
17AQI
7th January 2025
17AQI
17AQI
8th January 2025
17AQI
17AQI
9th January 2025
20AQI
20AQI
10th January 2025
20AQI
20AQI
11th January 2025
24AQI
24AQI
12th January 2025
28AQI
28AQI
13th January 2025
53AQI
53AQI
14th January 2025
24AQI
24AQI
15th January 2025
20AQI
20AQI
16th January 2025
39AQI
39AQI
17th January 2025
61AQI
61AQI
18th January 2025
46AQI
46AQI
19th January 2025
28AQI
28AQI
20th January 2025
21AQI
21AQI
21st January 2025
45AQI
45AQI
22nd January 2025
51AQI
51AQI
23rd January 2025
62AQI
62AQI
24th January 2025
58AQI
58AQI
25th January 2025
49AQI
49AQI
26th January 2025
45AQI
45AQI
27th January 2025
34AQI
34AQI
28th January 2025
24AQI
24AQI
29th January 2025
26AQI
26AQI
30th January 2025
18AQI
18AQI
31st January 2025
42AQI
42AQI
1st February 2025
21AQI
21AQI
2nd February 2025
24AQI
24AQI
3rd February 2025
59AQI
59AQI
4th February 2025
26AQI
26AQI
5th February 2025
20AQI
20AQI
6th February 2025
40AQI
40AQI
7th February 2025
34AQI
34AQI
8th February 2025
25AQI
25AQI
9th February 2025
28AQI
28AQI
10th February 2025
37AQI
37AQI
11th February 2025
54AQI
54AQI
12th February 2025
44AQI
44AQI
13th February 2025
23AQI
23AQI
14th February 2025
19AQI
19AQI
15th February 2025
23AQI
23AQI
16th February 2025
22AQI
22AQI
17th February 2025
19AQI
19AQI
18th February 2025
20AQI
20AQI
19th February 2025
20AQI
20AQI
20th February 2025
20AQI
20AQI
21st February 2025
18AQI
18AQI
22nd February 2025
26AQI
26AQI
23rd February 2025
48AQI
48AQI
24th February 2025
56AQI
56AQI
25th February 2025
44AQI
44AQI
26th February 2025
25AQI
25AQI
27th February 2025
41AQI
41AQI
28th February 2025
21AQI
21AQI
1st March 2025
25AQI
25AQI
2nd March 2025
19AQI
19AQI
3rd March 2025
22AQI
22AQI
4th March 2025
44AQI
44AQI
5th March 2025
30AQI
30AQI
6th March 2025
21AQI
21AQI
7th March 2025
19AQI
19AQI
8th March 2025
19AQI
19AQI
9th March 2025
21AQI
21AQI
10th March 2025
28AQI
28AQI
11th March 2025
31AQI
31AQI
12th March 2025
21AQI
21AQI
13th March 2025
20AQI
20AQI
14th March 2025
25AQI
25AQI
15th March 2025
23AQI
23AQI
16th March 2025
34AQI
34AQI
17th March 2025
17AQI
17AQI
18th March 2025
17AQI
17AQI
19th March 2025
28AQI
28AQI
20th March 2025
16AQI
16AQI
21st March 2025
14AQI
14AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
16AQI
16AQI
24th March 2025
23AQI
23AQI
25th March 2025
33AQI
33AQI
26th March 2025
24AQI
24AQI
27th March 2025
17AQI
17AQI
28th March 2025
24AQI
24AQI
29th March 2025
40AQI
40AQI
30th March 2025
32AQI
32AQI
31st March 2025
46AQI
46AQI
1st April 2025
18AQI
18AQI
2nd April 2025
19AQI
19AQI
3rd April 2025
40AQI
40AQI
4th April 2025
26AQI
26AQI
5th April 2025
20AQI
20AQI
6th April 2025
19AQI
19AQI
7th April 2025
19AQI
19AQI
8th April 2025
21AQI
21AQI
9th April 2025
15AQI
15AQI
10th April 2025
30AQI
30AQI
11th April 2025
23AQI
23AQI
12th April 2025
15AQI
15AQI
13th April 2025
15AQI
15AQI
14th April 2025
21AQI
21AQI
15th April 2025
38AQI
38AQI
16th April 2025
10AQI
10AQI
17th April 2025
13AQI
13AQI
18th April 2025
27AQI
27AQI
19th April 2025
55AQI
55AQI
20th April 2025
17AQI
17AQI
21st April 2025
18AQI
18AQI
22nd April 2025
34AQI
34AQI
23rd April 2025
19AQI
19AQI
24th April 2025
37AQI
37AQI
25th April 2025
46AQI
46AQI
26th April 2025
32AQI
32AQI
27th April 2025
10AQI
10AQI
28th April 2025
21AQI
21AQI
29th April 2025
28AQI
28AQI
30th April 2025
24AQI
24AQI
1st May 2025
19AQI
19AQI
2nd May 2025
41AQI
41AQI
3rd May 2025
48AQI
48AQI
4th May 2025
38AQI
38AQI
5th May 2025
19AQI
19AQI
6th May 2025
21AQI
21AQI
7th May 2025
31AQI
31AQI
8th May 2025
22AQI
22AQI
9th May 2025
22AQI
22AQI
10th May 2025
14AQI
14AQI
11th May 2025
28AQI
28AQI
12th May 2025
27AQI
27AQI
13th May 2025
31AQI
31AQI
14th May 2025
30AQI
30AQI
15th May 2025
30AQI
30AQI
16th May 2025
38AQI
38AQI
17th May 2025
36AQI
36AQI
18th May 2025
18AQI
18AQI
19th May 2025
12AQI
12AQI
20th May 2025
12AQI
12AQI
21st May 2025
17AQI
17AQI
22nd May 2025
14AQI
14AQI
23rd May 2025
14AQI
14AQI
24th May 2025
14AQI
14AQI
25th May 2025
13AQI
13AQI
26th May 2025
18AQI
18AQI
27th May 2025
28AQI
28AQI
28th May 2025
25AQI
25AQI
29th May 2025
23AQI
23AQI
30th May 2025
37AQI
37AQI
31st May 2025
18AQI
18AQI
1st June 2025
14AQI
14AQI
2nd June 2025
19AQI
19AQI
3rd June 2025
28AQI
28AQI
4th June 2025
38AQI
38AQI
5th June 2025
61AQI
61AQI
6th June 2025
62AQI
62AQI
7th June 2025
48AQI
48AQI
8th June 2025
72AQI
72AQI
9th June 2025
73AQI
73AQI
10th June 2025
33AQI
33AQI
11th June 2025
52AQI
52AQI
12th June 2025
69AQI
69AQI
13th June 2025
67AQI
67AQI
14th June 2025
58AQI
58AQI
15th June 2025
42AQI
42AQI
16th June 2025
40AQI
40AQI
17th June 2025
31AQI
31AQI
18th June 2025
20AQI
20AQI
19th June 2025
24AQI
24AQI
20th June 2025
32AQI
32AQI
21st June 2025
58AQI
58AQI
22nd June 2025
58AQI
58AQI
23rd June 2025
58AQI
58AQI
24th June 2025
60AQI
60AQI
25th June 2025
53AQI
53AQI
26th June 2025
41AQI
41AQI
27th June 2025
30AQI
30AQI
28th June 2025
30AQI
30AQI
29th June 2025
42AQI
42AQI
30th June 2025
39AQI
39AQI
1st July 2025
48AQI
48AQI
2nd July 2025
39AQI
39AQI
3rd July 2025
49AQI
49AQI
4th July 2025
46AQI
46AQI
5th July 2025
79AQI
79AQI
6th July 2025
63AQI
63AQI
7th July 2025
51AQI
51AQI
8th July 2025
43AQI
43AQI
9th July 2025
29AQI
29AQI
10th July 2025
32AQI
32AQI
11th July 2025
34AQI
34AQI
12th July 2025
31AQI
31AQI
13th July 2025
21AQI
21AQI
14th July 2025
29AQI
29AQI
15th July 2025
31AQI
31AQI
16th July 2025
36AQI
36AQI
17th July 2025
42AQI
42AQI
18th July 2025
18AQI
18AQI
19th July 2025
25AQI
25AQI
20th July 2025
25AQI
25AQI
21st July 2025
41AQI
41AQI
22nd July 2025
23AQI
23AQI
23rd July 2025
31AQI
31AQI
24th July 2025
34AQI
34AQI
25th July 2025
44AQI
44AQI
26th July 2025
74AQI
74AQI
27th July 2025
93AQI
93AQI
28th July 2025
70AQI
70AQI
29th July 2025
59AQI
59AQI
30th July 2025
54AQI
54AQI
31st July 2025
62AQI
62AQI
1st August 2025
59AQI
59AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
60AQI
60AQI
4th August 2025
78AQI
78AQI
5th August 2025
113AQI
113AQI
6th August 2025
84AQI
84AQI
32AQI
31AQI
25AQI
24AQI
24AQI
45AQI
44AQI
73AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202533AQI
26
5
25
3
31
29
1
31
17
13
22
9
1
4
1
182
35
1
Highest AQI recorded in
August73AQI
Lowest AQI recorded in
April24AQI
202427AQI
29
2
27
2
31
30
31
28
1
27
3
25
6
30
30
1
30
28
3
346
18
Highest AQI recorded in
August37AQI
Lowest AQI recorded in
March17AQI
202333AQI
29
2
26
2
29
2
28
2
30
1
20
6
2
2
21
9
1
26
5
25
5
28
3
27
2
23
8
312
47
3
2
Highest AQI recorded in
June50AQI
Lowest AQI recorded in
January25AQI
202230AQI
20
11
21
26
5
23
1
30
1
30
21
2
1
29
27
4
29
1
25
6
282
31
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
April23AQI
202131AQI
24
5
25
3
30
1
29
1
30
1
28
2
23
6
2
26
5
30
31
26
4
21
8
323
36
2
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
May25AQI
202031AQI
11
1
21
17
1
30
30
1
31
27
3
31
25
5
24
7
247
18
Highest AQI recorded in
November38AQI
Lowest AQI recorded in
March22AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
33AQILeast Polluted Year Recorded
2024(Avg.)
27AQIHartford's annual 2025 AQI (33) shows an average percentage change of 9.6% (worsened AQI) compared to previous years: 2020 (31), 2021 (31), 2022 (30), 2023 (33), 2024 (27).
