Boston By Hillern, 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 By Hillern, Boston, Massachusetts, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2025
81AQILowest AQI recorded on
20th Aug 2024
16AQISame Day Analysis (11th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 11th Aug - 12th Aug 2025
Boston By Hillern, Boston, Massachusetts, United States
AQI
Day
Night
.
5 AM11th Aug 2025
8 PM
4 AM12th Aug 2025
Day time
Avg. Highest Time
1PM11th Aug
62AQI
Avg. Lowest Time
5AM11th Aug
48AQI
Night time
Avg. Highest Time
4AM12th Aug
66AQI
Avg. Lowest Time
8PM11th Aug
58AQI
In the last 24 hours,
Boston By Hillern's AQI reached its highest point of 66 at 4 AM during the Night, while the lowest point, 48, was recorded at 5 AM during the Day between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Boston By Hillern, Boston, Massachusetts, United States
JulAug
13th - 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 - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th
Day
Night
13th Jul 2025185 AMAQI
13th Jul 2025186 AMAQI
13th Jul 2025217 AMAQI
13th Jul 2025208 AMAQI
13th Jul 2025229 AMAQI
13th Jul 20252410 AMAQI
13th Jul 20252211 AMAQI
13th Jul 20252212 PMAQI
13th Jul 2025221 PMAQI
13th Jul 2025222 PMAQI
13th Jul 2025243 PMAQI
13th Jul 2025234 PMAQI
13th Jul 2025255 PMAQI
13th Jul 2025266 PMAQI
13th Jul 2025247 PMAQI
13th Jul 2025248 PMAQI
13th Jul 2025259 PMAQI
13th Jul 20252410 PMAQI
13th Jul 20252411 PMAQI
14th Jul 20252312 AMAQI
14th Jul 2025231 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025223 AMAQI
14th Jul 2025234 AMAQI
22°C18/25°C
14th Jul 2025255 AMAQI
14th Jul 2025246 AMAQI
14th Jul 2025247 AMAQI
14th Jul 2025248 AMAQI
14th Jul 2025249 AMAQI
14th Jul 20252410 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252412 PMAQI
14th Jul 2025251 PMAQI
14th Jul 2025272 PMAQI
14th Jul 2025263 PMAQI
14th Jul 2025264 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025266 PMAQI
14th Jul 2025267 PMAQI
14th Jul 2025268 PMAQI
14th Jul 2025279 PMAQI
14th Jul 20252710 PMAQI
14th Jul 20252711 PMAQI
15th Jul 20252712 AMAQI
15th Jul 2025261 AMAQI
15th Jul 2025262 AMAQI
15th Jul 2025273 AMAQI
15th Jul 2025334 AMAQI
22°C19/27°C
15th Jul 2025295 AMAQI
15th Jul 2025256 AMAQI
15th Jul 2025247 AMAQI
15th Jul 2025258 AMAQI
15th Jul 2025259 AMAQI
15th Jul 20252410 AMAQI
15th Jul 20252711 AMAQI
15th Jul 20253112 PMAQI
15th Jul 2025311 PMAQI
15th Jul 2025332 PMAQI
15th Jul 2025303 PMAQI
15th Jul 2025314 PMAQI
15th Jul 2025315 PMAQI
15th Jul 2025296 PMAQI
15th Jul 2025297 PMAQI
15th Jul 2025308 PMAQI
15th Jul 2025299 PMAQI
15th Jul 20252810 PMAQI
15th Jul 20252811 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025291 AMAQI
16th Jul 2025252 AMAQI
16th Jul 2025263 AMAQI
16th Jul 2025264 AMAQI
27°C22/34°C
16th Jul 2025265 AMAQI
16th Jul 2025286 AMAQI
16th Jul 2025297 AMAQI
16th Jul 2025308 AMAQI
16th Jul 2025319 AMAQI
16th Jul 20253810 AMAQI
16th Jul 20254811 AMAQI
16th Jul 20254212 PMAQI
16th Jul 2025401 PMAQI
16th Jul 2025402 PMAQI
16th Jul 2025383 PMAQI
16th Jul 2025374 PMAQI
16th Jul 2025375 PMAQI
16th Jul 2025386 PMAQI
16th Jul 2025367 PMAQI
16th Jul 2025348 PMAQI
16th Jul 2025369 PMAQI
16th Jul 20253710 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20253512 AMAQI
17th Jul 2025341 AMAQI
17th Jul 2025362 AMAQI
17th Jul 2025373 AMAQI
17th Jul 2025384 AMAQI
27°C22/33°C
17th Jul 2025405 AMAQI
17th Jul 2025416 AMAQI
17th Jul 2025417 AMAQI
17th Jul 2025428 AMAQI
17th Jul 2025439 AMAQI
17th Jul 20254610 AMAQI
17th Jul 20254611 AMAQI
17th Jul 20254212 PMAQI
17th Jul 2025381 PMAQI
17th Jul 2025342 PMAQI
17th Jul 2025353 PMAQI
17th Jul 2025364 PMAQI
17th Jul 2025355 PMAQI
17th Jul 2025366 PMAQI
17th Jul 2025377 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025369 PMAQI
17th Jul 20253710 PMAQI
17th Jul 20253911 PMAQI
18th Jul 20253812 AMAQI
18th Jul 2025361 AMAQI
18th Jul 2025212 AMAQI
18th Jul 2025203 AMAQI
18th Jul 2025184 AMAQI
26°C23/32°C
18th Jul 2025185 AMAQI
18th Jul 2025206 AMAQI
18th Jul 2025217 AMAQI
18th Jul 2025198 AMAQI
18th Jul 2025199 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20251611 AMAQI
18th Jul 20251712 PMAQI
18th Jul 2025171 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025213 PMAQI
18th Jul 2025204 PMAQI
18th Jul 2025205 PMAQI
18th Jul 2025216 PMAQI
18th Jul 2025207 PMAQI
18th Jul 2025208 PMAQI
18th Jul 2025219 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252112 AMAQI
19th Jul 2025211 AMAQI
19th Jul 2025282 AMAQI
19th Jul 2025303 AMAQI
19th Jul 2025304 AMAQI
25°C20/29°C
19th Jul 2025305 AMAQI
19th Jul 2025306 AMAQI
19th Jul 2025307 AMAQI
19th Jul 2025298 AMAQI
19th Jul 2025319 AMAQI
19th Jul 20253410 AMAQI
19th Jul 20253411 AMAQI
19th Jul 20253412 PMAQI
19th Jul 2025321 PMAQI
19th Jul 2025302 PMAQI
19th Jul 2025293 PMAQI
19th Jul 2025284 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025286 PMAQI
19th Jul 2025297 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025269 PMAQI
19th Jul 20252610 PMAQI
19th Jul 20252611 PMAQI
20th Jul 20252612 AMAQI
20th Jul 2025261 AMAQI
20th Jul 2025172 AMAQI
20th Jul 2025163 AMAQI
20th Jul 2025164 AMAQI
24°C17/30°C
20th Jul 2025165 AMAQI
20th Jul 2025166 AMAQI
20th Jul 2025187 AMAQI
20th Jul 2025188 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20251910 AMAQI
20th Jul 20251911 AMAQI
20th Jul 20251812 PMAQI
20th Jul 2025191 PMAQI
20th Jul 2025202 PMAQI
20th Jul 2025203 PMAQI
20th Jul 2025204 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 2025182 AMAQI
21st Jul 2025183 AMAQI
21st Jul 2025204 AMAQI
25°C20/32°C
21st Jul 2025225 AMAQI
21st Jul 2025306 AMAQI
21st Jul 2025317 AMAQI
21st Jul 2025368 AMAQI
21st Jul 2025469 AMAQI
21st Jul 20255210 AMAQI
21st Jul 20255411 AMAQI
21st Jul 20255412 PMAQI
21st Jul 2025531 PMAQI
21st Jul 2025462 PMAQI
21st Jul 2025423 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025265 PMAQI
21st Jul 2025246 PMAQI
21st Jul 2025247 PMAQI
21st Jul 2025248 PMAQI
21st Jul 2025209 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252311 PMAQI
22nd Jul 20252412 AMAQI
22nd Jul 2025231 AMAQI
22nd Jul 2025172 AMAQI
22nd Jul 2025163 AMAQI
22nd Jul 2025164 AMAQI
23°C19/27°C
22nd Jul 2025175 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025188 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025183 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025197 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 2025182 AMAQI
23rd Jul 2025193 AMAQI
23rd Jul 2025224 AMAQI
21°C15/27°C
23rd Jul 2025215 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025217 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025259 AMAQI
23rd Jul 20252510 AMAQI
23rd Jul 20252711 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025272 PMAQI
23rd Jul 2025263 PMAQI
23rd Jul 2025244 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025266 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025258 PMAQI
23rd Jul 2025259 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252311 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025221 AMAQI
24th Jul 2025192 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025204 AMAQI
23°C18/28°C
24th Jul 2025205 AMAQI
24th Jul 2025226 AMAQI
24th Jul 2025237 AMAQI
24th Jul 2025238 AMAQI
24th Jul 2025239 AMAQI
24th Jul 20252510 AMAQI
24th Jul 20252911 AMAQI
24th Jul 20253112 PMAQI
24th Jul 2025381 PMAQI
24th Jul 2025382 PMAQI
24th Jul 2025373 PMAQI
24th Jul 2025384 PMAQI
24th Jul 2025385 PMAQI
24th Jul 2025366 PMAQI
24th Jul 2025287 PMAQI
24th Jul 2025278 PMAQI
24th Jul 2025309 PMAQI
24th Jul 20252910 PMAQI
24th Jul 20252811 PMAQI
25th Jul 20252812 AMAQI
25th Jul 2025281 AMAQI
25th Jul 2025272 AMAQI
25th Jul 2025273 AMAQI
25th Jul 2025294 AMAQI
26°C19/33°C
25th Jul 2025335 AMAQI
25th Jul 2025356 AMAQI
25th Jul 2025367 AMAQI
25th Jul 2025408 AMAQI
25th Jul 2025469 AMAQI
25th Jul 20254710 AMAQI
25th Jul 20254811 AMAQI
25th Jul 20255012 PMAQI
25th Jul 2025521 PMAQI
25th Jul 2025512 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025435 PMAQI
25th Jul 2025436 PMAQI
25th Jul 2025427 PMAQI
25th Jul 2025368 PMAQI
25th Jul 2025309 PMAQI
25th Jul 20253110 PMAQI
25th Jul 20253211 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025321 AMAQI
26th Jul 2025542 AMAQI
26th Jul 2025573 AMAQI
26th Jul 2025704 AMAQI
27°C22/35°C
26th Jul 20251155 AMAQI
26th Jul 20251296 AMAQI
26th Jul 20251327 AMAQI
26th Jul 20251258 AMAQI
26th Jul 20251229 AMAQI
26th Jul 202510610 AMAQI
26th Jul 202510411 AMAQI
26th Jul 20258812 PMAQI
26th Jul 2025821 PMAQI
26th Jul 2025802 PMAQI
26th Jul 2025793 PMAQI
26th Jul 2025714 PMAQI
26th Jul 2025655 PMAQI
26th Jul 2025746 PMAQI
26th Jul 2025667 PMAQI
26th Jul 2025668 PMAQI
26th Jul 2025659 PMAQI
26th Jul 20257110 PMAQI
26th Jul 20257311 PMAQI
27th Jul 20257412 AMAQI
27th Jul 2025761 AMAQI
27th Jul 2025822 AMAQI
27th Jul 2025863 AMAQI
27th Jul 2025864 AMAQI
25°C21/29°C
27th Jul 2025865 AMAQI
27th Jul 2025806 AMAQI
27th Jul 2025817 AMAQI
27th Jul 2025808 AMAQI
27th Jul 2025799 AMAQI
27th Jul 20258010 AMAQI
27th Jul 20258111 AMAQI
27th Jul 20258312 PMAQI
27th Jul 2025831 PMAQI
27th Jul 2025842 PMAQI
27th Jul 2025843 PMAQI
27th Jul 2025844 PMAQI
27th Jul 2025825 PMAQI
27th Jul 2025826 PMAQI
27th Jul 2025797 PMAQI
27th Jul 2025798 PMAQI
27th Jul 2025789 PMAQI
27th Jul 20257810 PMAQI
27th Jul 20257911 PMAQI
28th Jul 20257812 AMAQI
28th Jul 2025781 AMAQI
28th Jul 2025802 AMAQI
28th Jul 2025843 AMAQI
28th Jul 2025844 AMAQI
22°C19/25°C
28th Jul 2025795 AMAQI
28th Jul 2025766 AMAQI
28th Jul 2025757 AMAQI
28th Jul 2025738 AMAQI
28th Jul 2025729 AMAQI
28th Jul 20257110 AMAQI
28th Jul 20257111 AMAQI
28th Jul 20256812 PMAQI
28th Jul 2025661 PMAQI
28th Jul 2025662 PMAQI
28th Jul 2025683 PMAQI
28th Jul 2025684 PMAQI
28th Jul 2025675 PMAQI
28th Jul 2025676 PMAQI
28th Jul 2025707 PMAQI
28th Jul 2025678 PMAQI
28th Jul 2025659 PMAQI
28th Jul 20256610 PMAQI
28th Jul 20256511 PMAQI
29th Jul 20256612 AMAQI
29th Jul 2025671 AMAQI
29th Jul 2025602 AMAQI
29th Jul 2025603 AMAQI
29th Jul 2025604 AMAQI
25°C20/32°C
29th Jul 2025605 AMAQI
29th Jul 2025626 AMAQI
29th Jul 2025627 AMAQI
29th Jul 2025638 AMAQI
29th Jul 2025639 AMAQI
29th Jul 20256210 AMAQI
29th Jul 20256011 AMAQI
29th Jul 20256112 PMAQI
29th Jul 2025611 PMAQI
29th Jul 2025612 PMAQI
29th Jul 2025623 PMAQI
29th Jul 2025614 PMAQI
29th Jul 2025625 PMAQI
29th Jul 2025616 PMAQI
29th Jul 2025617 PMAQI
29th Jul 2025608 PMAQI
29th Jul 2025589 PMAQI
29th Jul 20255910 PMAQI
29th Jul 20255811 PMAQI
30th Jul 20255912 AMAQI
30th Jul 2025591 AMAQI
30th Jul 2025582 AMAQI
30th Jul 2025583 AMAQI
30th Jul 2025544 AMAQI
30°C23/37°C
30th Jul 2025505 AMAQI
30th Jul 2025506 AMAQI
30th Jul 2025527 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 2025552 PMAQI
30th Jul 2025553 PMAQI
30th Jul 2025554 PMAQI
30th Jul 2025555 PMAQI
30th Jul 2025556 PMAQI
30th Jul 2025557 PMAQI
30th Jul 2025558 PMAQI
30th Jul 2025549 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255511 PMAQI
31st Jul 20255512 AMAQI
31st Jul 2025551 AMAQI
31st Jul 2025452 AMAQI
31st Jul 2025443 AMAQI
31st Jul 2025464 AMAQI
27°C24/30°C
31st Jul 2025495 AMAQI
31st Jul 2025546 AMAQI
31st Jul 2025597 AMAQI
31st Jul 2025638 AMAQI
31st Jul 2025669 AMAQI
31st Jul 20257110 AMAQI
31st Jul 20257811 AMAQI
31st Jul 20258812 PMAQI
31st Jul 2025881 PMAQI
31st Jul 2025902 PMAQI
31st Jul 2025913 PMAQI
31st Jul 2025914 PMAQI
31st Jul 2025945 PMAQI
31st Jul 2025916 PMAQI
31st Jul 2025677 PMAQI
31st Jul 2025728 PMAQI
31st Jul 2025819 PMAQI
31st Jul 20258310 PMAQI
31st Jul 20257111 PMAQI
1st Aug 20256512 AMAQI
1st Aug 2025601 AMAQI
1st Aug 2025672 AMAQI
1st Aug 2025703 AMAQI
1st Aug 2025744 AMAQI
23°C18/25°C
1st Aug 2025735 AMAQI
1st Aug 2025726 AMAQI
1st Aug 2025717 AMAQI
1st Aug 2025708 AMAQI
1st Aug 2025689 AMAQI
1st Aug 20257010 AMAQI
1st Aug 20256811 AMAQI
1st Aug 20256712 PMAQI
1st Aug 2025661 PMAQI
1st Aug 2025642 PMAQI
1st Aug 2025623 PMAQI
1st Aug 2025594 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025456 PMAQI
1st Aug 2025697 PMAQI
1st Aug 2025508 PMAQI
1st Aug 2025309 PMAQI
1st Aug 20253210 PMAQI
1st Aug 20253611 PMAQI
2nd Aug 20254412 AMAQI
2nd Aug 2025421 AMAQI
2nd Aug 2025392 AMAQI
2nd Aug 2025313 AMAQI
2nd Aug 2025324 AMAQI
19°C16/22°C
2nd Aug 2025335 AMAQI
2nd Aug 2025336 AMAQI
2nd Aug 2025327 AMAQI
2nd Aug 2025318 AMAQI
2nd Aug 2025309 AMAQI
2nd Aug 20252710 AMAQI
2nd Aug 20252611 AMAQI
2nd Aug 20252712 PMAQI
2nd Aug 2025281 PMAQI
2nd Aug 2025282 PMAQI
2nd Aug 2025283 PMAQI
2nd Aug 2025284 PMAQI
2nd Aug 2025285 PMAQI
2nd Aug 2025306 PMAQI
2nd Aug 2025327 PMAQI
2nd Aug 2025348 PMAQI
2nd Aug 2025409 PMAQI
2nd Aug 20253910 PMAQI
2nd Aug 20254011 PMAQI
3rd Aug 20253812 AMAQI
3rd Aug 2025421 AMAQI
3rd Aug 2025402 AMAQI
3rd Aug 2025383 AMAQI
3rd Aug 2025364 AMAQI
20°C14/26°C
3rd Aug 2025385 AMAQI
3rd Aug 2025376 AMAQI
3rd Aug 2025377 AMAQI
3rd Aug 2025448 AMAQI
3rd Aug 2025549 AMAQI
3rd Aug 20255910 AMAQI
3rd Aug 20256611 AMAQI
3rd Aug 20257112 PMAQI
3rd Aug 2025761 PMAQI
3rd Aug 2025812 PMAQI
3rd Aug 2025853 PMAQI
3rd Aug 2025904 PMAQI
3rd Aug 2025865 PMAQI
3rd Aug 2025846 PMAQI
3rd Aug 2025547 PMAQI
3rd Aug 2025608 PMAQI
3rd Aug 2025609 PMAQI
3rd Aug 20255610 PMAQI
3rd Aug 20255511 PMAQI
4th Aug 20255412 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025552 AMAQI
4th Aug 2025383 AMAQI
4th Aug 2025414 AMAQI
23°C15/30°C
4th Aug 2025435 AMAQI
4th Aug 2025516 AMAQI
4th Aug 2025567 AMAQI
4th Aug 2025588 AMAQI
4th Aug 2025649 AMAQI
4th Aug 20257210 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20259012 PMAQI
4th Aug 20251091 PMAQI
4th Aug 20251162 PMAQI
4th Aug 20251173 PMAQI
4th Aug 20251244 PMAQI
4th Aug 20251085 PMAQI
4th Aug 20251056 PMAQI
4th Aug 2025667 PMAQI
4th Aug 2025888 PMAQI
4th Aug 20251039 PMAQI
4th Aug 202510410 PMAQI
4th Aug 202510311 PMAQI
5th Aug 20259612 AMAQI
5th Aug 20251001 AMAQI
5th Aug 2025782 AMAQI
5th Aug 2025793 AMAQI
5th Aug 2025814 AMAQI
24°C17/31°C
5th Aug 2025865 AMAQI
5th Aug 2025996 AMAQI
5th Aug 20251077 AMAQI
5th Aug 20251248 AMAQI
5th Aug 20251229 AMAQI
5th Aug 202511910 AMAQI
5th Aug 202511311 AMAQI
5th Aug 202510112 PMAQI
5th Aug 2025801 PMAQI
5th Aug 2025722 PMAQI
5th Aug 2025643 PMAQI
5th Aug 2025604 PMAQI
5th Aug 2025565 PMAQI
5th Aug 2025526 PMAQI
5th Aug 2025847 PMAQI
5th Aug 2025678 PMAQI
5th Aug 2025489 PMAQI
5th Aug 20254910 PMAQI
5th Aug 20255211 PMAQI
6th Aug 20254912 AMAQI
6th Aug 2025441 AMAQI
6th Aug 2025472 AMAQI
6th Aug 2025523 AMAQI
6th Aug 2025544 AMAQI
21°C19/22°C
6th Aug 2025535 AMAQI
6th Aug 2025536 AMAQI
6th Aug 2025547 AMAQI
6th Aug 2025558 AMAQI
6th Aug 2025559 AMAQI
6th Aug 20255510 AMAQI
6th Aug 20255511 AMAQI
6th Aug 20255412 PMAQI
6th Aug 2025531 PMAQI
6th Aug 2025482 PMAQI
6th Aug 2025423 PMAQI
6th Aug 2025354 PMAQI
6th Aug 2025365 PMAQI
6th Aug 2025386 PMAQI
6th Aug 2025527 PMAQI
6th Aug 2025558 PMAQI
6th Aug 2025609 PMAQI
6th Aug 20256810 PMAQI
6th Aug 20255711 PMAQI
7th Aug 20255412 AMAQI
7th Aug 2025801 AMAQI
7th Aug 2025782 AMAQI
7th Aug 2025793 AMAQI
7th Aug 2025744 AMAQI
20°C17/24°C
7th Aug 2025685 AMAQI
7th Aug 2025696 AMAQI
7th Aug 2025727 AMAQI
7th Aug 2025758 AMAQI
7th Aug 2025749 AMAQI
7th Aug 20257210 AMAQI
7th Aug 20256611 AMAQI
7th Aug 20256012 PMAQI
7th Aug 2025571 PMAQI
7th Aug 2025602 PMAQI
7th Aug 2025643 PMAQI
7th Aug 2025644 PMAQI
7th Aug 2025635 PMAQI
7th Aug 2025626 PMAQI
7th Aug 2025657 PMAQI
7th Aug 2025668 PMAQI
7th Aug 2025609 PMAQI
7th Aug 20256210 PMAQI
7th Aug 20256011 PMAQI
8th Aug 20256212 AMAQI
8th Aug 2025391 AMAQI
8th Aug 2025302 AMAQI
8th Aug 2025293 AMAQI
8th Aug 2025304 AMAQI
22°C16/26°C
8th Aug 2025305 AMAQI
8th Aug 2025326 AMAQI
8th Aug 2025367 AMAQI
8th Aug 2025368 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20253410 AMAQI
8th Aug 20253611 AMAQI
8th Aug 20253512 PMAQI
8th Aug 2025361 PMAQI
8th Aug 2025362 PMAQI
8th Aug 2025373 PMAQI
8th Aug 2025374 PMAQI
8th Aug 2025375 PMAQI
8th Aug 2025366 PMAQI
8th Aug 2025367 PMAQI
8th Aug 2025388 PMAQI
8th Aug 2025389 PMAQI
8th Aug 20253710 PMAQI
8th Aug 20253611 PMAQI
9th Aug 20253712 AMAQI
9th Aug 2025331 AMAQI
9th Aug 2025322 AMAQI
9th Aug 2025333 AMAQI
9th Aug 2025344 AMAQI
23°C17/29°C
9th Aug 2025345 AMAQI
9th Aug 2025316 AMAQI
9th Aug 2025327 AMAQI
9th Aug 2025328 AMAQI
9th Aug 2025329 AMAQI
9th Aug 20253110 AMAQI
9th Aug 20253211 AMAQI
9th Aug 20253512 PMAQI
9th Aug 2025361 PMAQI
9th Aug 2025362 PMAQI
9th Aug 2025363 PMAQI
9th Aug 2025344 PMAQI
9th Aug 2025345 PMAQI
9th Aug 2025346 PMAQI
9th Aug 2025347 PMAQI
9th Aug 2025338 PMAQI
9th Aug 2025339 PMAQI
9th Aug 20253410 PMAQI
9th Aug 20253411 PMAQI
10th Aug 20253412 AMAQI
10th Aug 2025301 AMAQI
10th Aug 2025332 AMAQI
10th Aug 2025303 AMAQI
10th Aug 2025294 AMAQI
21°C17/26°C
10th Aug 2025285 AMAQI
10th Aug 2025286 AMAQI
10th Aug 2025297 AMAQI
10th Aug 2025308 AMAQI
10th Aug 2025319 AMAQI
10th Aug 20253310 AMAQI
10th Aug 20253711 AMAQI
10th Aug 20254412 PMAQI
10th Aug 2025461 PMAQI
10th Aug 2025432 PMAQI
10th Aug 2025393 PMAQI
10th Aug 2025404 PMAQI
10th Aug 2025405 PMAQI
10th Aug 2025406 PMAQI
10th Aug 2025377 PMAQI
10th Aug 2025368 PMAQI
10th Aug 2025399 PMAQI
10th Aug 20253610 PMAQI
10th Aug 20253611 PMAQI
11th Aug 20253512 AMAQI
11th Aug 2025351 AMAQI
11th Aug 2025362 AMAQI
11th Aug 2025393 AMAQI
11th Aug 2025424 AMAQI
25°C19/33°C
11th Aug 2025485 AMAQI
11th Aug 2025516 AMAQI
11th Aug 2025537 AMAQI
11th Aug 2025568 AMAQI
11th Aug 2025589 AMAQI
11th Aug 20255910 AMAQI
11th Aug 20255911 AMAQI
11th Aug 20256112 PMAQI
11th Aug 2025621 PMAQI
11th Aug 2025622 PMAQI
11th Aug 2025583 PMAQI
11th Aug 2025524 PMAQI
11th Aug 2025565 PMAQI
11th Aug 2025626 PMAQI
11th Aug 2025547 PMAQI
11th Aug 2025588 PMAQI
11th Aug 2025629 PMAQI
11th Aug 20256310 PMAQI
11th Aug 20256211 PMAQI
12th Aug 20256212 AMAQI
12th Aug 2025631 AMAQI
12th Aug 2025612 AMAQI
12th Aug 2025613 AMAQI
12th Aug 2025664 AMAQI
29°C22/36°C
12th Aug 2025625 AMAQI
5 AM12th Aug 2025666 AMAQI
12th Aug 2025637 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
47AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
47AQI
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. 47), while the lowest AQI was between 5 AM to 8 PM (Avg. 47).
Night time
Avg. Highest Time
12 AM - 11 PM
43AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
43AQI
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. 43), while the lowest AQI was between 12 AM to 11 PM (Avg. 43).
2025 Days Vs Air Quality
Boston By Hillern, Boston, Massachusetts, United States
2025
84%
188
16%
35
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Good
188 DaysModerate
35 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 224 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 By Hillern, 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
24AQI
24AQI
5th January 2025
23AQI
23AQI
6th January 2025
20AQI
20AQI
7th January 2025
20AQI
20AQI
8th January 2025
21AQI
21AQI
9th January 2025
24AQI
24AQI
10th January 2025
23AQI
23AQI
11th January 2025
35AQI
35AQI
12th January 2025
37AQI
37AQI
13th January 2025
55AQI
55AQI
14th January 2025
27AQI
27AQI
15th January 2025
25AQI
25AQI
16th January 2025
34AQI
34AQI
17th January 2025
60AQI
60AQI
18th January 2025
48AQI
48AQI
19th January 2025
30AQI
30AQI
20th January 2025
33AQI
33AQI
21st January 2025
53AQI
53AQI
22nd January 2025
60AQI
60AQI
23rd January 2025
56AQI
56AQI
24th January 2025
57AQI
57AQI
25th January 2025
44AQI
44AQI
26th January 2025
48AQI
48AQI
27th January 2025
29AQI
29AQI
28th January 2025
28AQI
28AQI
29th January 2025
33AQI
33AQI
30th January 2025
31AQI
31AQI
31st January 2025
38AQI
38AQI
1st February 2025
27AQI
27AQI
2nd February 2025
27AQI
27AQI
3rd February 2025
47AQI
47AQI
4th February 2025
27AQI
27AQI
5th February 2025
23AQI
23AQI
6th February 2025
38AQI
38AQI
7th February 2025
32AQI
32AQI
8th February 2025
31AQI
31AQI
9th February 2025
32AQI
32AQI
10th February 2025
34AQI
34AQI
11th February 2025
47AQI
47AQI
12th February 2025
38AQI
38AQI
13th February 2025
25AQI
25AQI
14th February 2025
30AQI
30AQI
15th February 2025
27AQI
27AQI
16th February 2025
26AQI
26AQI
17th February 2025
31AQI
31AQI
18th February 2025
28AQI
28AQI
19th February 2025
24AQI
24AQI
20th February 2025
27AQI
27AQI
21st February 2025
24AQI
24AQI
22nd February 2025
29AQI
29AQI
23rd February 2025
43AQI
43AQI
24th February 2025
48AQI
48AQI
25th February 2025
45AQI
45AQI
26th February 2025
28AQI
28AQI
27th February 2025
39AQI
39AQI
28th February 2025
26AQI
26AQI
1st March 2025
28AQI
28AQI
2nd March 2025
27AQI
27AQI
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
28AQI
28AQI
10th March 2025
27AQI
27AQI
11th March 2025
36AQI
36AQI
12th March 2025
28AQI
28AQI
13th March 2025
22AQI
22AQI
14th March 2025
28AQI
28AQI
15th March 2025
26AQI
26AQI
16th March 2025
33AQI
33AQI
17th March 2025
20AQI
20AQI
18th March 2025
17AQI
17AQI
19th March 2025
20AQI
20AQI
20th March 2025
18AQI
18AQI
21st March 2025
26AQI
26AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
16AQI
16AQI
24th March 2025
25AQI
25AQI
25th March 2025
30AQI
30AQI
26th March 2025
26AQI
26AQI
27th March 2025
17AQI
17AQI
28th March 2025
19AQI
19AQI
29th March 2025
20AQI
20AQI
30th March 2025
21AQI
21AQI
31st March 2025
33AQI
33AQI
1st April 2025
18AQI
18AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
26AQI
26AQI
4th April 2025
26AQI
26AQI
5th April 2025
20AQI
20AQI
6th April 2025
22AQI
22AQI
7th April 2025
16AQI
16AQI
8th April 2025
16AQI
16AQI
9th April 2025
14AQI
14AQI
10th April 2025
22AQI
22AQI
11th April 2025
22AQI
22AQI
12th April 2025
16AQI
16AQI
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
21AQI
21AQI
19th April 2025
48AQI
48AQI
20th April 2025
21AQI
21AQI
21st April 2025
15AQI
15AQI
22nd April 2025
42AQI
42AQI
23rd April 2025
25AQI
25AQI
24th April 2025
21AQI
21AQI
25th April 2025
56AQI
56AQI
26th April 2025
30AQI
30AQI
27th April 2025
12AQI
12AQI
28th April 2025
19AQI
19AQI
29th April 2025
28AQI
28AQI
30th April 2025
24AQI
24AQI
1st May 2025
17AQI
17AQI
2nd May 2025
41AQI
41AQI
3rd May 2025
47AQI
47AQI
4th May 2025
38AQI
38AQI
5th May 2025
26AQI
26AQI
6th May 2025
33AQI
33AQI
7th May 2025
28AQI
28AQI
8th May 2025
25AQI
25AQI
9th May 2025
34AQI
34AQI
10th May 2025
14AQI
14AQI
11th May 2025
20AQI
20AQI
12th May 2025
21AQI
21AQI
13th May 2025
29AQI
29AQI
14th May 2025
29AQI
29AQI
15th May 2025
40AQI
40AQI
16th May 2025
35AQI
35AQI
17th May 2025
36AQI
36AQI
18th May 2025
19AQI
19AQI
19th May 2025
13AQI
13AQI
20th May 2025
12AQI
12AQI
21st May 2025
17AQI
17AQI
22nd May 2025
21AQI
21AQI
23rd May 2025
14AQI
14AQI
24th May 2025
13AQI
13AQI
25th May 2025
13AQI
13AQI
26th May 2025
19AQI
19AQI
27th May 2025
26AQI
26AQI
28th May 2025
28AQI
28AQI
29th May 2025
22AQI
22AQI
30th May 2025
33AQI
33AQI
31st May 2025
19AQI
19AQI
1st June 2025
13AQI
13AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
24AQI
24AQI
4th June 2025
39AQI
39AQI
5th June 2025
59AQI
59AQI
6th June 2025
62AQI
62AQI
7th June 2025
54AQI
54AQI
8th June 2025
91AQI
91AQI
9th June 2025
84AQI
84AQI
10th June 2025
56AQI
56AQI
11th June 2025
53AQI
53AQI
12th June 2025
71AQI
71AQI
13th June 2025
54AQI
54AQI
14th June 2025
47AQI
47AQI
15th June 2025
30AQI
30AQI
16th June 2025
33AQI
33AQI
17th June 2025
29AQI
29AQI
18th June 2025
25AQI
25AQI
19th June 2025
28AQI
28AQI
20th June 2025
34AQI
34AQI
21st June 2025
52AQI
52AQI
22nd June 2025
54AQI
54AQI
23rd June 2025
52AQI
52AQI
24th June 2025
57AQI
57AQI
25th June 2025
53AQI
53AQI
26th June 2025
41AQI
41AQI
27th June 2025
26AQI
26AQI
28th June 2025
27AQI
27AQI
29th June 2025
41AQI
41AQI
30th June 2025
41AQI
41AQI
1st July 2025
40AQI
40AQI
2nd July 2025
34AQI
34AQI
3rd July 2025
45AQI
45AQI
4th July 2025
46AQI
46AQI
5th July 2025
55AQI
55AQI
6th July 2025
60AQI
60AQI
7th July 2025
47AQI
47AQI
8th July 2025
38AQI
38AQI
9th July 2025
34AQI
34AQI
10th July 2025
31AQI
31AQI
11th July 2025
32AQI
32AQI
12th July 2025
34AQI
34AQI
13th July 2025
24AQI
24AQI
14th July 2025
25AQI
25AQI
15th July 2025
28AQI
28AQI
16th July 2025
33AQI
33AQI
17th July 2025
38AQI
38AQI
18th July 2025
21AQI
21AQI
19th July 2025
29AQI
29AQI
20th July 2025
20AQI
20AQI
21st July 2025
30AQI
30AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
23AQI
23AQI
24th July 2025
27AQI
27AQI
25th July 2025
37AQI
37AQI
26th July 2025
77AQI
77AQI
27th July 2025
81AQI
81AQI
28th July 2025
73AQI
73AQI
29th July 2025
61AQI
61AQI
30th July 2025
55AQI
55AQI
31st July 2025
68AQI
68AQI
1st August 2025
60AQI
60AQI
2nd August 2025
33AQI
33AQI
3rd August 2025
56AQI
56AQI
4th August 2025
76AQI
76AQI
5th August 2025
81AQI
81AQI
6th August 2025
51AQI
51AQI
7th August 2025
67AQI
67AQI
8th August 2025
36AQI
36AQI
9th August 2025
34AQI
34AQI
10th August 2025
35AQI
35AQI
11th August 2025
50AQI
50AQI
35AQI
32AQI
25AQI
23AQI
25AQI
45AQI
41AQI
53AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202533AQI
25
6
28
31
29
1
31
16
14
23
8
5
6
188
35
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
April23AQI
202430AQI
26
5
27
2
31
30
31
29
29
2
22
9
29
31
30
29
2
344
20
Highest AQI recorded in
August38AQI
Lowest AQI recorded in
November24AQI
202335AQI
30
1
27
1
29
27
3
29
2
20
10
21
9
1
26
5
22
8
27
4
28
1
30
1
316
45
1
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
November27AQI
202233AQI
19
12
19
2
26
3
17
30
1
29
1
21
2
2
29
31
29
1
28
3
280
25
Highest AQI recorded in
January42AQI
Lowest AQI recorded in
August25AQI
202135AQI
26
4
22
6
29
2
30
30
22
6
24
6
1
25
6
30
31
25
3
27
4
321
37
1
Highest AQI recorded in
July43AQI
Lowest AQI recorded in
October28AQI
202036AQI
5
1
19
18
29
1
29
2
30
1
27
3
29
2
26
4
24
5
236
19
Highest AQI recorded in
August42AQI
Lowest AQI recorded in
April29AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
36AQILeast Polluted Year Recorded
2024(Avg.)
30AQIBoston By Hillern's annual 2025 AQI (33) shows an average percentage change of 0.1% (worsened AQI) compared to previous years: 2020 (36), 2021 (35), 2022 (33), 2023 (35), 2024 (30).
