Boston, Massachusetts, 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
Boston, Massachusetts, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
16th Aug 2024
70AQILowest AQI recorded on
20th Aug 2024
15AQISame Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Boston, Massachusetts, United States
AQI
Day
Night
.
5 AM3rd Aug 2025
8 PM
4 AM4th Aug 2025
Day time
Avg. Highest Time
4PM3rd Aug
88AQI
Avg. Lowest Time
5AM3rd Aug
34AQI
Night time
Avg. Highest Time
9PM3rd Aug
60AQI
Avg. Lowest Time
3AM4th Aug
36AQI
In the last 24 hours,
Boston's AQI reached its highest point of 88 at 4 PM during the Day, while the lowest point, 34, was recorded at 5 AM during the Day between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Boston, Massachusetts, United States
JulAug
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 Jul 2025505 AMAQI
5th Jul 2025486 AMAQI
5th Jul 2025517 AMAQI
5th Jul 2025518 AMAQI
5th Jul 2025459 AMAQI
5th Jul 20254110 AMAQI
5th Jul 20253911 AMAQI
5th Jul 20253912 PMAQI
5th Jul 2025381 PMAQI
5th Jul 2025412 PMAQI
5th Jul 2025493 PMAQI
5th Jul 2025484 PMAQI
5th Jul 2025485 PMAQI
5th Jul 2025476 PMAQI
5th Jul 2025487 PMAQI
5th Jul 2025488 PMAQI
5th Jul 2025489 PMAQI
5th Jul 20255110 PMAQI
5th Jul 20254911 PMAQI
6th Jul 20255012 AMAQI
6th Jul 2025501 AMAQI
6th Jul 2025612 AMAQI
6th Jul 2025613 AMAQI
6th Jul 2025584 AMAQI
--°C/°C
6th Jul 2025595 AMAQI
6th Jul 2025596 AMAQI
6th Jul 2025597 AMAQI
6th Jul 2025598 AMAQI
6th Jul 2025599 AMAQI
6th Jul 20255910 AMAQI
6th Jul 20255911 AMAQI
6th Jul 20255912 PMAQI
6th Jul 2025601 PMAQI
6th Jul 2025602 PMAQI
6th Jul 2025603 PMAQI
6th Jul 2025604 PMAQI
6th Jul 2025605 PMAQI
6th Jul 2025606 PMAQI
6th Jul 2025587 PMAQI
6th Jul 2025588 PMAQI
6th Jul 2025579 PMAQI
6th Jul 20255610 PMAQI
6th Jul 20255711 PMAQI
7th Jul 20255712 AMAQI
7th Jul 2025561 AMAQI
7th Jul 2025502 AMAQI
7th Jul 2025523 AMAQI
7th Jul 2025464 AMAQI
27°C20/35°C
7th Jul 2025435 AMAQI
7th Jul 2025426 AMAQI
7th Jul 2025427 AMAQI
7th Jul 2025428 AMAQI
7th Jul 2025409 AMAQI
7th Jul 20253910 AMAQI
7th Jul 20253711 AMAQI
7th Jul 20253912 PMAQI
7th Jul 2025381 PMAQI
7th Jul 2025402 PMAQI
7th Jul 2025413 PMAQI
7th Jul 2025394 PMAQI
7th Jul 2025405 PMAQI
7th Jul 2025416 PMAQI
7th Jul 2025437 PMAQI
7th Jul 2025438 PMAQI
7th Jul 2025429 PMAQI
7th Jul 20254010 PMAQI
7th Jul 20254111 PMAQI
8th Jul 20254112 AMAQI
8th Jul 2025391 AMAQI
8th Jul 2025312 AMAQI
8th Jul 2025343 AMAQI
8th Jul 2025344 AMAQI
26°C22/34°C
8th Jul 2025375 AMAQI
8th Jul 2025396 AMAQI
8th Jul 2025397 AMAQI
8th Jul 2025398 AMAQI
8th Jul 2025379 AMAQI
8th Jul 20253610 AMAQI
8th Jul 20253711 AMAQI
8th Jul 20253612 PMAQI
8th Jul 2025361 PMAQI
8th Jul 2025352 PMAQI
8th Jul 2025343 PMAQI
8th Jul 2025334 PMAQI
8th Jul 2025335 PMAQI
8th Jul 2025326 PMAQI
8th Jul 2025367 PMAQI
8th Jul 2025378 PMAQI
8th Jul 2025369 PMAQI
8th Jul 20253810 PMAQI
8th Jul 20253711 PMAQI
9th Jul 20253712 AMAQI
9th Jul 2025361 AMAQI
9th Jul 2025352 AMAQI
9th Jul 2025363 AMAQI
9th Jul 2025284 AMAQI
27°C21/34°C
9th Jul 2025265 AMAQI
9th Jul 2025286 AMAQI
9th Jul 2025327 AMAQI
9th Jul 2025358 AMAQI
9th Jul 2025329 AMAQI
9th Jul 20252910 AMAQI
9th Jul 20252711 AMAQI
9th Jul 20252712 PMAQI
9th Jul 2025281 PMAQI
9th Jul 2025332 PMAQI
9th Jul 2025353 PMAQI
9th Jul 2025354 PMAQI
9th Jul 2025385 PMAQI
9th Jul 2025366 PMAQI
9th Jul 2025347 PMAQI
9th Jul 2025338 PMAQI
9th Jul 2025359 PMAQI
9th Jul 20253510 PMAQI
9th Jul 20253611 PMAQI
10th Jul 20253612 AMAQI
10th Jul 2025361 AMAQI
10th Jul 2025352 AMAQI
10th Jul 2025353 AMAQI
10th Jul 2025344 AMAQI
22°C20/26°C
10th Jul 2025325 AMAQI
10th Jul 2025276 AMAQI
10th Jul 2025267 AMAQI
10th Jul 2025248 AMAQI
10th Jul 2025289 AMAQI
10th Jul 20252810 AMAQI
10th Jul 20252711 AMAQI
10th Jul 20252712 PMAQI
10th Jul 2025281 PMAQI
10th Jul 2025282 PMAQI
10th Jul 2025293 PMAQI
10th Jul 2025294 PMAQI
10th Jul 2025275 PMAQI
10th Jul 2025276 PMAQI
10th Jul 2025297 PMAQI
10th Jul 2025288 PMAQI
10th Jul 2025289 PMAQI
10th Jul 20252810 PMAQI
10th Jul 20252911 PMAQI
11th Jul 20252812 AMAQI
11th Jul 2025291 AMAQI
11th Jul 2025282 AMAQI
11th Jul 2025293 AMAQI
11th Jul 2025304 AMAQI
20°C19/24°C
11th Jul 2025335 AMAQI
11th Jul 2025336 AMAQI
11th Jul 2025357 AMAQI
11th Jul 2025388 AMAQI
11th Jul 2025419 AMAQI
11th Jul 20254010 AMAQI
11th Jul 20253811 AMAQI
11th Jul 20253312 PMAQI
11th Jul 2025331 PMAQI
11th Jul 2025342 PMAQI
11th Jul 2025343 PMAQI
11th Jul 2025334 PMAQI
11th Jul 2025335 PMAQI
11th Jul 2025316 PMAQI
11th Jul 2025327 PMAQI
11th Jul 2025338 PMAQI
11th Jul 2025339 PMAQI
11th Jul 20253210 PMAQI
11th Jul 20253411 PMAQI
12th Jul 20253412 AMAQI
12th Jul 2025321 AMAQI
12th Jul 2025302 AMAQI
12th Jul 2025303 AMAQI
12th Jul 2025344 AMAQI
21°C18/25°C
12th Jul 2025355 AMAQI
12th Jul 2025366 AMAQI
12th Jul 2025357 AMAQI
12th Jul 2025368 AMAQI
12th Jul 2025349 AMAQI
12th Jul 20253510 AMAQI
12th Jul 20253511 AMAQI
12th Jul 20253412 PMAQI
12th Jul 2025341 PMAQI
12th Jul 2025322 PMAQI
12th Jul 2025323 PMAQI
12th Jul 2025314 PMAQI
12th Jul 2025305 PMAQI
12th Jul 2025316 PMAQI
12th Jul 2025347 PMAQI
12th Jul 2025348 PMAQI
12th Jul 2025329 PMAQI
12th Jul 20253210 PMAQI
12th Jul 20253311 PMAQI
13th Jul 20253212 AMAQI
13th Jul 2025321 AMAQI
13th Jul 2025232 AMAQI
13th Jul 2025233 AMAQI
13th Jul 2025204 AMAQI
22°C20/26°C
13th Jul 2025205 AMAQI
13th Jul 2025186 AMAQI
13th Jul 2025197 AMAQI
13th Jul 2025188 AMAQI
13th Jul 2025209 AMAQI
13th Jul 20252010 AMAQI
13th Jul 20252011 AMAQI
13th Jul 20252212 PMAQI
13th Jul 2025211 PMAQI
13th Jul 2025222 PMAQI
13th Jul 2025233 PMAQI
13th Jul 2025234 PMAQI
13th Jul 2025245 PMAQI
13th Jul 2025256 PMAQI
13th Jul 2025237 PMAQI
13th Jul 2025238 PMAQI
13th Jul 2025259 PMAQI
13th Jul 20252310 PMAQI
13th Jul 20252311 PMAQI
14th Jul 20252212 AMAQI
14th Jul 2025231 AMAQI
14th Jul 2025212 AMAQI
14th Jul 2025223 AMAQI
14th Jul 2025234 AMAQI
22°C18/25°C
14th Jul 2025245 AMAQI
14th Jul 2025246 AMAQI
14th Jul 2025237 AMAQI
14th Jul 2025238 AMAQI
14th Jul 2025239 AMAQI
14th Jul 20252310 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252512 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025252 PMAQI
14th Jul 2025253 PMAQI
14th Jul 2025254 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025266 PMAQI
14th Jul 2025267 PMAQI
14th Jul 2025268 PMAQI
14th Jul 2025289 PMAQI
14th Jul 20252810 PMAQI
14th Jul 20252711 PMAQI
15th Jul 20252712 AMAQI
15th Jul 2025261 AMAQI
15th Jul 2025252 AMAQI
15th Jul 2025263 AMAQI
15th Jul 2025284 AMAQI
22°C19/27°C
15th Jul 2025265 AMAQI
15th Jul 2025236 AMAQI
15th Jul 2025227 AMAQI
15th Jul 2025238 AMAQI
15th Jul 2025249 AMAQI
15th Jul 20252310 AMAQI
15th Jul 20252511 AMAQI
15th Jul 20253012 PMAQI
15th Jul 2025321 PMAQI
15th Jul 2025332 PMAQI
15th Jul 2025313 PMAQI
15th Jul 2025324 PMAQI
15th Jul 2025325 PMAQI
15th Jul 2025306 PMAQI
15th Jul 2025297 PMAQI
15th Jul 2025288 PMAQI
15th Jul 2025299 PMAQI
15th Jul 20252810 PMAQI
15th Jul 20252811 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025281 AMAQI
16th Jul 2025262 AMAQI
16th Jul 2025253 AMAQI
16th Jul 2025264 AMAQI
27°C22/34°C
16th Jul 2025265 AMAQI
16th Jul 2025276 AMAQI
16th Jul 2025297 AMAQI
16th Jul 2025308 AMAQI
16th Jul 2025319 AMAQI
16th Jul 20254110 AMAQI
16th Jul 20255011 AMAQI
16th Jul 20254812 PMAQI
16th Jul 2025441 PMAQI
16th Jul 2025432 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025394 PMAQI
16th Jul 2025395 PMAQI
16th Jul 2025396 PMAQI
16th Jul 2025377 PMAQI
16th Jul 2025368 PMAQI
16th Jul 2025369 PMAQI
16th Jul 20253810 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20253612 AMAQI
17th Jul 2025341 AMAQI
17th Jul 2025342 AMAQI
17th Jul 2025363 AMAQI
17th Jul 2025374 AMAQI
27°C22/33°C
17th Jul 2025385 AMAQI
17th Jul 2025396 AMAQI
17th Jul 2025407 AMAQI
17th Jul 2025428 AMAQI
17th Jul 2025439 AMAQI
17th Jul 20254610 AMAQI
17th Jul 20254511 AMAQI
17th Jul 20254212 PMAQI
17th Jul 2025371 PMAQI
17th Jul 2025332 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025344 PMAQI
17th Jul 2025335 PMAQI
17th Jul 2025326 PMAQI
17th Jul 2025367 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025359 PMAQI
17th Jul 20253710 PMAQI
17th Jul 20253711 PMAQI
18th Jul 20253612 AMAQI
18th Jul 2025361 AMAQI
18th Jul 2025232 AMAQI
18th Jul 2025213 AMAQI
18th Jul 2025184 AMAQI
26°C23/32°C
18th Jul 2025195 AMAQI
18th Jul 2025196 AMAQI
18th Jul 2025197 AMAQI
18th Jul 2025188 AMAQI
18th Jul 2025179 AMAQI
18th Jul 20251610 AMAQI
18th Jul 20251411 AMAQI
18th Jul 20251512 PMAQI
18th Jul 2025151 PMAQI
18th Jul 2025162 PMAQI
18th Jul 2025183 PMAQI
18th Jul 2025184 PMAQI
18th Jul 2025195 PMAQI
18th Jul 2025206 PMAQI
18th Jul 2025197 PMAQI
18th Jul 2025208 PMAQI
18th Jul 2025219 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252012 AMAQI
19th Jul 2025211 AMAQI
19th Jul 2025262 AMAQI
19th Jul 2025273 AMAQI
19th Jul 2025274 AMAQI
25°C20/29°C
19th Jul 2025275 AMAQI
19th Jul 2025276 AMAQI
19th Jul 2025277 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20252910 AMAQI
19th Jul 20252911 AMAQI
19th Jul 20252912 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025274 PMAQI
19th Jul 2025275 PMAQI
19th Jul 2025266 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025259 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252511 PMAQI
20th Jul 20252412 AMAQI
20th Jul 2025241 AMAQI
20th Jul 2025172 AMAQI
20th Jul 2025163 AMAQI
20th Jul 2025154 AMAQI
24°C17/30°C
20th Jul 2025165 AMAQI
20th Jul 2025176 AMAQI
20th Jul 2025177 AMAQI
20th Jul 2025188 AMAQI
20th Jul 2025179 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20251911 AMAQI
20th Jul 20251812 PMAQI
20th Jul 2025181 PMAQI
20th Jul 2025202 PMAQI
20th Jul 2025203 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025215 PMAQI
20th Jul 2025216 PMAQI
20th Jul 2025217 PMAQI
20th Jul 2025228 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252310 PMAQI
20th Jul 20252311 PMAQI
21st Jul 20252312 AMAQI
21st Jul 2025221 AMAQI
21st Jul 2025192 AMAQI
21st Jul 2025193 AMAQI
21st Jul 2025194 AMAQI
25°C20/32°C
21st Jul 2025225 AMAQI
21st Jul 2025276 AMAQI
21st Jul 2025307 AMAQI
21st Jul 2025358 AMAQI
21st Jul 2025469 AMAQI
21st Jul 20255310 AMAQI
21st Jul 20255511 AMAQI
21st Jul 20255512 PMAQI
21st Jul 2025541 PMAQI
21st Jul 2025482 PMAQI
21st Jul 2025433 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025275 PMAQI
21st Jul 2025256 PMAQI
21st Jul 2025257 PMAQI
21st Jul 2025248 PMAQI
21st Jul 2025209 PMAQI
21st Jul 20252110 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252312 AMAQI
22nd Jul 2025231 AMAQI
22nd Jul 2025172 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025164 AMAQI
23°C19/27°C
22nd Jul 2025165 AMAQI
22nd Jul 2025176 AMAQI
22nd Jul 2025177 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025171 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025183 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025209 PMAQI
22nd Jul 20252010 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025212 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025214 AMAQI
21°C15/27°C
23rd Jul 2025205 AMAQI
23rd Jul 2025206 AMAQI
23rd Jul 2025207 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025239 AMAQI
23rd Jul 20252510 AMAQI
23rd Jul 20252711 AMAQI
23rd Jul 20252712 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025282 PMAQI
23rd Jul 2025263 PMAQI
23rd Jul 2025254 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025256 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252311 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025231 AMAQI
24th Jul 2025192 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025214 AMAQI
23°C18/28°C
24th Jul 2025215 AMAQI
24th Jul 2025216 AMAQI
24th Jul 2025217 AMAQI
24th Jul 2025228 AMAQI
24th Jul 2025229 AMAQI
24th Jul 20252410 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025382 PMAQI
24th Jul 2025393 PMAQI
24th Jul 2025424 PMAQI
24th Jul 2025425 PMAQI
24th Jul 2025406 PMAQI
24th Jul 2025297 PMAQI
24th Jul 2025288 PMAQI
24th Jul 2025329 PMAQI
24th Jul 20253010 PMAQI
24th Jul 20253011 PMAQI
25th Jul 20252912 AMAQI
25th Jul 2025291 AMAQI
25th Jul 2025272 AMAQI
25th Jul 2025283 AMAQI
25th Jul 2025304 AMAQI
26°C19/33°C
25th Jul 2025325 AMAQI
25th Jul 2025346 AMAQI
25th Jul 2025377 AMAQI
25th Jul 2025408 AMAQI
25th Jul 2025459 AMAQI
25th Jul 20254710 AMAQI
25th Jul 20254911 AMAQI
25th Jul 20255112 PMAQI
25th Jul 2025531 PMAQI
25th Jul 2025522 PMAQI
25th Jul 2025483 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025435 PMAQI
25th Jul 2025426 PMAQI
25th Jul 2025397 PMAQI
25th Jul 2025368 PMAQI
25th Jul 2025289 PMAQI
25th Jul 20252910 PMAQI
25th Jul 20253011 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025321 AMAQI
26th Jul 2025532 AMAQI
26th Jul 2025563 AMAQI
26th Jul 2025674 AMAQI
27°C22/35°C
26th Jul 20251035 AMAQI
26th Jul 20251216 AMAQI
26th Jul 20251277 AMAQI
26th Jul 20251278 AMAQI
26th Jul 20251229 AMAQI
26th Jul 202510710 AMAQI
26th Jul 202510211 AMAQI
26th Jul 20258812 PMAQI
26th Jul 2025811 PMAQI
26th Jul 2025792 PMAQI
26th Jul 2025793 PMAQI
26th Jul 2025714 PMAQI
26th Jul 2025685 PMAQI
26th Jul 2025686 PMAQI
26th Jul 2025667 PMAQI
26th Jul 2025668 PMAQI
26th Jul 2025659 PMAQI
26th Jul 20256810 PMAQI
26th Jul 20257211 PMAQI
27th Jul 20257212 AMAQI
27th Jul 2025751 AMAQI
27th Jul 2025832 AMAQI
27th Jul 2025883 AMAQI
27th Jul 2025864 AMAQI
25°C21/29°C
27th Jul 2025845 AMAQI
27th Jul 2025796 AMAQI
27th Jul 2025787 AMAQI
27th Jul 2025778 AMAQI
27th Jul 2025769 AMAQI
27th Jul 20257810 AMAQI
27th Jul 20257811 AMAQI
27th Jul 20258212 PMAQI
27th Jul 2025811 PMAQI
27th Jul 2025822 PMAQI
27th Jul 2025823 PMAQI
27th Jul 2025824 PMAQI
27th Jul 2025815 PMAQI
27th Jul 2025796 PMAQI
27th Jul 2025787 PMAQI
27th Jul 2025788 PMAQI
27th Jul 2025779 PMAQI
27th Jul 20257810 PMAQI
27th Jul 20257811 PMAQI
28th Jul 20257712 AMAQI
28th Jul 2025761 AMAQI
28th Jul 2025792 AMAQI
28th Jul 2025823 AMAQI
28th Jul 2025824 AMAQI
22°C19/25°C
28th Jul 2025785 AMAQI
28th Jul 2025766 AMAQI
28th Jul 2025747 AMAQI
28th Jul 2025738 AMAQI
28th Jul 2025739 AMAQI
28th Jul 20257010 AMAQI
28th Jul 20256911 AMAQI
28th Jul 20256712 PMAQI
28th Jul 2025651 PMAQI
28th Jul 2025652 PMAQI
28th Jul 2025673 PMAQI
28th Jul 2025674 PMAQI
28th Jul 2025665 PMAQI
28th Jul 2025666 PMAQI
28th Jul 2025697 PMAQI
28th Jul 2025668 PMAQI
28th Jul 2025629 PMAQI
28th Jul 20256410 PMAQI
28th Jul 20256311 PMAQI
29th Jul 20256412 AMAQI
29th Jul 2025651 AMAQI
29th Jul 2025582 AMAQI
29th Jul 2025593 AMAQI
29th Jul 2025584 AMAQI
25°C20/32°C
29th Jul 2025585 AMAQI
29th Jul 2025606 AMAQI
29th Jul 2025617 AMAQI
29th Jul 2025628 AMAQI
29th Jul 2025619 AMAQI
29th Jul 20256110 AMAQI
29th Jul 20256011 AMAQI
29th Jul 20256112 PMAQI
29th Jul 2025601 PMAQI
29th Jul 2025602 PMAQI
29th Jul 2025613 PMAQI
29th Jul 2025604 PMAQI
29th Jul 2025605 PMAQI
29th Jul 2025596 PMAQI
29th Jul 2025607 PMAQI
29th Jul 2025598 PMAQI
29th Jul 2025579 PMAQI
29th Jul 20255710 PMAQI
29th Jul 20255611 PMAQI
30th Jul 20255712 AMAQI
30th Jul 2025581 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025553 AMAQI
30th Jul 2025514 AMAQI
30°C23/37°C
30th Jul 2025485 AMAQI
30th Jul 2025486 AMAQI
30th Jul 2025507 AMAQI
30th Jul 2025528 AMAQI
30th Jul 2025529 AMAQI
30th Jul 20255310 AMAQI
30th Jul 20255311 AMAQI
30th Jul 20255412 PMAQI
30th Jul 2025541 PMAQI
30th Jul 2025542 PMAQI
30th Jul 2025543 PMAQI
30th Jul 2025544 PMAQI
30th Jul 2025545 PMAQI
30th Jul 2025546 PMAQI
30th Jul 2025547 PMAQI
30th Jul 2025548 PMAQI
30th Jul 2025549 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255411 PMAQI
31st Jul 20255512 AMAQI
31st Jul 2025531 AMAQI
31st Jul 2025432 AMAQI
31st Jul 2025433 AMAQI
31st Jul 2025444 AMAQI
27°C24/30°C
31st Jul 2025475 AMAQI
31st Jul 2025536 AMAQI
31st Jul 2025577 AMAQI
31st Jul 2025628 AMAQI
31st Jul 2025669 AMAQI
31st Jul 20257010 AMAQI
31st Jul 20257811 AMAQI
31st Jul 20258512 PMAQI
31st Jul 2025871 PMAQI
31st Jul 2025892 PMAQI
31st Jul 2025913 PMAQI
31st Jul 2025904 PMAQI
31st Jul 2025925 PMAQI
31st Jul 2025906 PMAQI
31st Jul 2025667 PMAQI
31st Jul 2025728 PMAQI
31st Jul 2025829 PMAQI
31st Jul 20258310 PMAQI
31st Jul 20257211 PMAQI
1st Aug 20256712 AMAQI
1st Aug 2025621 AMAQI
1st Aug 2025672 AMAQI
1st Aug 2025713 AMAQI
1st Aug 2025744 AMAQI
23°C18/25°C
1st Aug 2025735 AMAQI
1st Aug 2025726 AMAQI
1st Aug 2025717 AMAQI
1st Aug 2025718 AMAQI
1st Aug 2025689 AMAQI
1st Aug 20256910 AMAQI
1st Aug 20256611 AMAQI
1st Aug 20256412 PMAQI
1st Aug 2025621 PMAQI
1st Aug 2025602 PMAQI
1st Aug 2025573 PMAQI
1st Aug 2025554 PMAQI
1st Aug 2025515 PMAQI
1st Aug 2025396 PMAQI
1st Aug 2025687 PMAQI
1st Aug 2025488 PMAQI
1st Aug 2025299 PMAQI
1st Aug 20253110 PMAQI
1st Aug 20253711 PMAQI
2nd Aug 20254612 AMAQI
2nd Aug 2025441 AMAQI
2nd Aug 2025382 AMAQI
2nd Aug 2025313 AMAQI
2nd Aug 2025304 AMAQI
19°C16/22°C
2nd Aug 2025315 AMAQI
2nd Aug 2025316 AMAQI
2nd Aug 2025317 AMAQI
2nd Aug 2025298 AMAQI
2nd Aug 2025289 AMAQI
2nd Aug 20252510 AMAQI
2nd Aug 20252511 AMAQI
2nd Aug 20252512 PMAQI
2nd Aug 2025271 PMAQI
2nd Aug 2025262 PMAQI
2nd Aug 2025263 PMAQI
2nd Aug 2025264 PMAQI
2nd Aug 2025265 PMAQI
2nd Aug 2025286 PMAQI
2nd Aug 2025307 PMAQI
2nd Aug 2025318 PMAQI
2nd Aug 2025369 PMAQI
2nd Aug 20253710 PMAQI
2nd Aug 20253611 PMAQI
3rd Aug 20253512 AMAQI
3rd Aug 2025401 AMAQI
3rd Aug 2025392 AMAQI
3rd Aug 2025363 AMAQI
3rd Aug 2025354 AMAQI
20°C14/26°C
3rd Aug 2025345 AMAQI
3rd Aug 2025366 AMAQI
3rd Aug 2025357 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025509 AMAQI
3rd Aug 20255810 AMAQI
3rd Aug 20256411 AMAQI
3rd Aug 20257112 PMAQI
3rd Aug 2025761 PMAQI
3rd Aug 2025802 PMAQI
3rd Aug 2025853 PMAQI
3rd Aug 2025884 PMAQI
3rd Aug 2025875 PMAQI
3rd Aug 2025846 PMAQI
3rd Aug 2025537 PMAQI
3rd Aug 2025588 PMAQI
3rd Aug 2025609 PMAQI
3rd Aug 20255510 PMAQI
3rd Aug 20255411 PMAQI
4th Aug 20255312 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025562 AMAQI
4th Aug 2025363 AMAQI
4th Aug 2025384 AMAQI
23°C15/30°C
4th Aug 2025415 AMAQI
5 AM4th Aug 2025486 AMAQI
4th Aug 2025537 AMAQI
4th Aug 2025578 AMAQI
4th Aug 2025639 AMAQI
4th Aug 20257010 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20259012 PMAQI
12 PM4th Aug 20251051 PMAQI
4th Aug 20251132 PMAQI
4th Aug 20251143 PMAQI
4th Aug 20251184 PMAQI
4th Aug 20251085 PMAQI
4th Aug 20251056 PMAQI
4th Aug 2025667 PMAQI
4th Aug 2025878 PMAQI
8 PM4th Aug 20251019 PMAQI
4th Aug 202510410 PMAQI
12 AM
4 AM
24°C17/31°C
Day time
Avg. Highest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 43), while the lowest AQI was between 5 AM to 8 PM (Avg. 43).
Night time
Avg. Highest Time
9 PM - 11 PM
41AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM - 4 AM
39AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 41), while the lowest AQI was between 12 AM to 4 AM (Avg. 39).
2025 Days Vs Air Quality
Boston, Massachusetts, United States
2025
86%
185
14%
30
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
185 DaysModerate
30 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 217 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
Boston, Massachusetts, 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
26AQI
26AQI
2nd January 2025
21AQI
21AQI
3rd January 2025
21AQI
21AQI
4th January 2025
25AQI
25AQI
5th January 2025
24AQI
24AQI
6th January 2025
20AQI
20AQI
7th January 2025
20AQI
20AQI
8th January 2025
21AQI
21AQI
9th January 2025
23AQI
23AQI
10th January 2025
23AQI
23AQI
11th January 2025
31AQI
31AQI
12th January 2025
34AQI
34AQI
13th January 2025
53AQI
53AQI
14th January 2025
27AQI
27AQI
15th January 2025
24AQI
24AQI
16th January 2025
33AQI
33AQI
17th January 2025
58AQI
58AQI
18th January 2025
47AQI
47AQI
19th January 2025
29AQI
29AQI
20th January 2025
29AQI
29AQI
21st January 2025
47AQI
47AQI
22nd January 2025
54AQI
54AQI
23rd January 2025
53AQI
53AQI
24th January 2025
55AQI
55AQI
25th January 2025
43AQI
43AQI
26th January 2025
46AQI
46AQI
27th January 2025
28AQI
28AQI
28th January 2025
28AQI
28AQI
29th January 2025
30AQI
30AQI
30th January 2025
31AQI
31AQI
31st January 2025
37AQI
37AQI
1st February 2025
27AQI
27AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
44AQI
44AQI
4th February 2025
27AQI
27AQI
5th February 2025
23AQI
23AQI
6th February 2025
37AQI
37AQI
7th February 2025
32AQI
32AQI
8th February 2025
31AQI
31AQI
9th February 2025
31AQI
31AQI
10th February 2025
31AQI
31AQI
11th February 2025
45AQI
45AQI
12th February 2025
37AQI
37AQI
13th February 2025
25AQI
25AQI
14th February 2025
29AQI
29AQI
15th February 2025
27AQI
27AQI
16th February 2025
26AQI
26AQI
17th February 2025
29AQI
29AQI
18th February 2025
27AQI
27AQI
19th February 2025
23AQI
23AQI
20th February 2025
25AQI
25AQI
21st February 2025
24AQI
24AQI
22nd February 2025
29AQI
29AQI
23rd February 2025
41AQI
41AQI
24th February 2025
47AQI
47AQI
25th February 2025
44AQI
44AQI
26th February 2025
28AQI
28AQI
27th February 2025
38AQI
38AQI
28th February 2025
26AQI
26AQI
1st March 2025
29AQI
29AQI
2nd March 2025
28AQI
28AQI
3rd March 2025
26AQI
26AQI
4th March 2025
37AQI
37AQI
5th March 2025
31AQI
31AQI
6th March 2025
26AQI
26AQI
7th March 2025
29AQI
29AQI
8th March 2025
30AQI
30AQI
9th March 2025
29AQI
29AQI
10th March 2025
27AQI
27AQI
11th March 2025
36AQI
36AQI
12th March 2025
28AQI
28AQI
13th March 2025
22AQI
22AQI
14th March 2025
29AQI
29AQI
15th March 2025
26AQI
26AQI
16th March 2025
34AQI
34AQI
17th March 2025
19AQI
19AQI
18th March 2025
17AQI
17AQI
19th March 2025
21AQI
21AQI
20th March 2025
18AQI
18AQI
21st March 2025
25AQI
25AQI
22nd March 2025
19AQI
19AQI
23rd March 2025
16AQI
16AQI
24th March 2025
25AQI
25AQI
25th March 2025
28AQI
28AQI
26th March 2025
24AQI
24AQI
27th March 2025
18AQI
18AQI
28th March 2025
20AQI
20AQI
29th March 2025
21AQI
21AQI
30th March 2025
23AQI
23AQI
31st March 2025
36AQI
36AQI
1st April 2025
19AQI
19AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
26AQI
26AQI
4th April 2025
26AQI
26AQI
5th April 2025
22AQI
22AQI
6th April 2025
21AQI
21AQI
7th April 2025
17AQI
17AQI
8th April 2025
17AQI
17AQI
9th April 2025
15AQI
15AQI
10th April 2025
21AQI
21AQI
11th April 2025
21AQI
21AQI
12th April 2025
18AQI
18AQI
13th April 2025
16AQI
16AQI
14th April 2025
20AQI
20AQI
15th April 2025
32AQI
32AQI
16th April 2025
12AQI
12AQI
17th April 2025
15AQI
15AQI
18th April 2025
20AQI
20AQI
19th April 2025
49AQI
49AQI
20th April 2025
21AQI
21AQI
21st April 2025
16AQI
16AQI
22nd April 2025
43AQI
43AQI
23rd April 2025
26AQI
26AQI
24th April 2025
22AQI
22AQI
25th April 2025
55AQI
55AQI
26th April 2025
32AQI
32AQI
27th April 2025
12AQI
12AQI
28th April 2025
19AQI
19AQI
29th April 2025
27AQI
27AQI
30th April 2025
24AQI
24AQI
1st May 2025
18AQI
18AQI
2nd May 2025
40AQI
40AQI
3rd May 2025
47AQI
47AQI
4th May 2025
39AQI
39AQI
5th May 2025
27AQI
27AQI
6th May 2025
34AQI
34AQI
7th May 2025
29AQI
29AQI
8th May 2025
26AQI
26AQI
9th May 2025
35AQI
35AQI
10th May 2025
15AQI
15AQI
11th May 2025
21AQI
21AQI
12th May 2025
22AQI
22AQI
13th May 2025
30AQI
30AQI
14th May 2025
31AQI
31AQI
15th May 2025
42AQI
42AQI
16th May 2025
37AQI
37AQI
17th May 2025
37AQI
37AQI
18th May 2025
19AQI
19AQI
19th May 2025
13AQI
13AQI
20th May 2025
13AQI
13AQI
21st May 2025
18AQI
18AQI
22nd May 2025
22AQI
22AQI
23rd May 2025
15AQI
15AQI
24th May 2025
14AQI
14AQI
25th May 2025
13AQI
13AQI
26th May 2025
20AQI
20AQI
27th May 2025
26AQI
26AQI
28th May 2025
28AQI
28AQI
29th May 2025
22AQI
22AQI
30th May 2025
33AQI
33AQI
31st May 2025
20AQI
20AQI
1st June 2025
13AQI
13AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
24AQI
24AQI
4th June 2025
39AQI
39AQI
5th June 2025
58AQI
58AQI
6th June 2025
62AQI
62AQI
7th June 2025
55AQI
55AQI
8th June 2025
89AQI
89AQI
9th June 2025
83AQI
83AQI
10th June 2025
58AQI
58AQI
11th June 2025
52AQI
52AQI
12th June 2025
70AQI
70AQI
13th June 2025
54AQI
54AQI
14th June 2025
46AQI
46AQI
15th June 2025
31AQI
31AQI
16th June 2025
34AQI
34AQI
17th June 2025
30AQI
30AQI
18th June 2025
24AQI
24AQI
19th June 2025
27AQI
27AQI
20th June 2025
34AQI
34AQI
21st June 2025
52AQI
52AQI
22nd June 2025
53AQI
53AQI
23rd June 2025
51AQI
51AQI
24th June 2025
55AQI
55AQI
25th June 2025
53AQI
53AQI
26th June 2025
39AQI
39AQI
27th June 2025
26AQI
26AQI
28th June 2025
28AQI
28AQI
29th June 2025
42AQI
42AQI
30th June 2025
39AQI
39AQI
1st July 2025
39AQI
39AQI
2nd July 2025
33AQI
33AQI
3rd July 2025
45AQI
45AQI
4th July 2025
43AQI
43AQI
5th July 2025
51AQI
51AQI
6th July 2025
58AQI
58AQI
7th July 2025
44AQI
44AQI
8th July 2025
36AQI
36AQI
9th July 2025
33AQI
33AQI
10th July 2025
30AQI
30AQI
11th July 2025
33AQI
33AQI
12th July 2025
33AQI
33AQI
13th July 2025
23AQI
23AQI
14th July 2025
24AQI
24AQI
15th July 2025
28AQI
28AQI
16th July 2025
35AQI
35AQI
17th July 2025
37AQI
37AQI
18th July 2025
20AQI
20AQI
19th July 2025
26AQI
26AQI
20th July 2025
20AQI
20AQI
21st July 2025
30AQI
30AQI
22nd July 2025
18AQI
18AQI
23rd July 2025
23AQI
23AQI
24th July 2025
28AQI
28AQI
25th July 2025
37AQI
37AQI
26th July 2025
76AQI
76AQI
27th July 2025
80AQI
80AQI
28th July 2025
71AQI
71AQI
29th July 2025
60AQI
60AQI
30th July 2025
54AQI
54AQI
31st July 2025
68AQI
68AQI
1st August 2025
59AQI
59AQI
2nd August 2025
32AQI
32AQI
3rd August 2025
53AQI
53AQI
34AQI
31AQI
26AQI
23AQI
26AQI
45AQI
40AQI
48AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202532AQI
26
5
28
31
29
1
31
16
14
23
8
1
2
185
30
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
April23AQI
202429AQI
28
3
29
31
30
31
30
28
3
24
7
30
31
30
29
2
351
15
Highest AQI recorded in
August38AQI
Lowest AQI recorded in
November24AQI
202334AQI
31
27
1
31
27
3
31
20
10
21
9
1
26
5
23
7
29
2
28
1
30
1
324
39
1
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
November27AQI
202232AQI
23
8
20
1
27
4
17
30
1
29
1
21
2
2
30
31
29
1
28
3
287
21
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
August24AQI
202132AQI
27
3
25
3
31
30
31
26
3
26
5
26
5
30
31
27
3
28
3
338
25
Highest AQI recorded in
July36AQI
Lowest AQI recorded in
October24AQI
202033AQI
5
1
19
18
29
1
30
1
30
1
27
3
31
26
4
26
5
241
16
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
April29AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
34AQILeast Polluted Year Recorded
2024(Avg.)
29AQIBoston's annual 2025 AQI (32) shows an average percentage change of 0.8% (worsened AQI) compared to previous years: 2020 (33), 2021 (32), 2022 (32), 2023 (34), 2024 (29).
