Portland Deering Oaks, Portland, Maine, 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
Portland Deering Oaks, Portland, Maine, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
4th Aug 2025
82AQILowest AQI recorded on
20th Aug 2024
9AQISame Day Analysis (11th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 41 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
Portland Deering Oaks, Portland, Maine, United States
AQI
Day
Night
.
5 AM11th Aug 2025
8 PM
4 AM12th Aug 2025
Day time
Avg. Highest Time
5PM11th Aug
64AQI
Avg. Lowest Time
5AM11th Aug
30AQI
Night time
Avg. Highest Time
4AM12th Aug
61AQI
Avg. Lowest Time
8PM11th Aug
53AQI
In the last 24 hours,
Portland Deering Oaks's AQI reached its highest point of 64 at 5 PM during the Day, while the lowest point, 30, was recorded at 5 AM during the Day between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Portland Deering Oaks, Portland, Maine, 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 2025205 AMAQI
13th Jul 2025166 AMAQI
13th Jul 2025167 AMAQI
13th Jul 2025188 AMAQI
13th Jul 2025239 AMAQI
13th Jul 20252110 AMAQI
13th Jul 20251711 AMAQI
13th Jul 20251612 PMAQI
13th Jul 2025171 PMAQI
13th Jul 2025172 PMAQI
13th Jul 2025193 PMAQI
13th Jul 2025204 PMAQI
13th Jul 2025205 PMAQI
13th Jul 2025206 PMAQI
13th Jul 2025187 PMAQI
13th Jul 2025188 PMAQI
13th Jul 2025199 PMAQI
13th Jul 20251810 PMAQI
13th Jul 20252111 PMAQI
14th Jul 20252112 AMAQI
14th Jul 2025181 AMAQI
14th Jul 2025172 AMAQI
14th Jul 2025173 AMAQI
14th Jul 2025164 AMAQI
18°C17/18°C
14th Jul 2025165 AMAQI
14th Jul 2025166 AMAQI
14th Jul 2025177 AMAQI
14th Jul 2025178 AMAQI
14th Jul 2025199 AMAQI
14th Jul 20251910 AMAQI
14th Jul 20252211 AMAQI
14th Jul 20252112 PMAQI
14th Jul 2025161 PMAQI
14th Jul 2025182 PMAQI
14th Jul 2025193 PMAQI
14th Jul 2025244 PMAQI
14th Jul 2025245 PMAQI
14th Jul 2025236 PMAQI
14th Jul 2025207 PMAQI
14th Jul 2025198 PMAQI
14th Jul 2025239 PMAQI
14th Jul 20252410 PMAQI
14th Jul 20252311 PMAQI
15th Jul 20252412 AMAQI
15th Jul 2025321 AMAQI
15th Jul 2025222 AMAQI
15th Jul 2025183 AMAQI
15th Jul 2025164 AMAQI
19°C17/21°C
15th Jul 2025245 AMAQI
15th Jul 2025296 AMAQI
15th Jul 2025287 AMAQI
15th Jul 2025288 AMAQI
15th Jul 2025279 AMAQI
15th Jul 20253210 AMAQI
15th Jul 20254411 AMAQI
15th Jul 20254412 PMAQI
15th Jul 2025521 PMAQI
15th Jul 2025482 PMAQI
15th Jul 2025383 PMAQI
15th Jul 2025384 PMAQI
15th Jul 2025345 PMAQI
15th Jul 2025326 PMAQI
15th Jul 2025307 PMAQI
15th Jul 2025328 PMAQI
15th Jul 2025329 PMAQI
15th Jul 20252810 PMAQI
15th Jul 20252911 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025291 AMAQI
16th Jul 2025292 AMAQI
16th Jul 2025363 AMAQI
16th Jul 2025304 AMAQI
20°C18/22°C
16th Jul 2025225 AMAQI
16th Jul 2025216 AMAQI
16th Jul 2025267 AMAQI
16th Jul 2025318 AMAQI
16th Jul 2025449 AMAQI
16th Jul 20255410 AMAQI
16th Jul 20255111 AMAQI
16th Jul 20255212 PMAQI
16th Jul 2025541 PMAQI
16th Jul 2025552 PMAQI
16th Jul 2025523 PMAQI
16th Jul 2025524 PMAQI
16th Jul 2025535 PMAQI
16th Jul 2025526 PMAQI
16th Jul 2025407 PMAQI
16th Jul 2025418 PMAQI
16th Jul 2025399 PMAQI
16th Jul 20253810 PMAQI
16th Jul 20253911 PMAQI
17th Jul 20253412 AMAQI
17th Jul 2025281 AMAQI
17th Jul 2025322 AMAQI
17th Jul 2025313 AMAQI
17th Jul 2025294 AMAQI
19°C17/21°C
17th Jul 2025265 AMAQI
17th Jul 2025326 AMAQI
17th Jul 2025377 AMAQI
17th Jul 2025398 AMAQI
17th Jul 2025409 AMAQI
17th Jul 20253410 AMAQI
17th Jul 20253411 AMAQI
17th Jul 20253512 PMAQI
17th Jul 2025321 PMAQI
17th Jul 2025412 PMAQI
17th Jul 2025443 PMAQI
17th Jul 2025404 PMAQI
17th Jul 2025425 PMAQI
17th Jul 2025406 PMAQI
17th Jul 2025387 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025349 PMAQI
17th Jul 20253310 PMAQI
17th Jul 20253011 PMAQI
18th Jul 20252612 AMAQI
18th Jul 2025221 AMAQI
18th Jul 2025142 AMAQI
18th Jul 2025133 AMAQI
18th Jul 2025144 AMAQI
20°C18/22°C
18th Jul 2025205 AMAQI
18th Jul 2025186 AMAQI
18th Jul 2025167 AMAQI
18th Jul 2025138 AMAQI
18th Jul 2025189 AMAQI
18th Jul 20251510 AMAQI
18th Jul 20251211 AMAQI
18th Jul 20251612 PMAQI
18th Jul 2025191 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025163 PMAQI
18th Jul 2025164 PMAQI
18th Jul 2025165 PMAQI
18th Jul 2025176 PMAQI
18th Jul 2025167 PMAQI
18th Jul 2025178 PMAQI
18th Jul 2025189 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252311 PMAQI
19th Jul 20252512 AMAQI
19th Jul 2025271 AMAQI
19th Jul 2025222 AMAQI
19th Jul 2025223 AMAQI
19th Jul 2025274 AMAQI
23°C19/26°C
19th Jul 2025265 AMAQI
19th Jul 2025306 AMAQI
19th Jul 2025267 AMAQI
19th Jul 2025248 AMAQI
19th Jul 2025249 AMAQI
19th Jul 20252310 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252712 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025283 PMAQI
19th Jul 2025264 PMAQI
19th Jul 2025265 PMAQI
19th Jul 2025276 PMAQI
19th Jul 2025277 PMAQI
19th Jul 2025278 PMAQI
19th Jul 2025289 PMAQI
19th Jul 20252710 PMAQI
19th Jul 20252811 PMAQI
20th Jul 20252812 AMAQI
20th Jul 2025241 AMAQI
20th Jul 2025172 AMAQI
20th Jul 2025203 AMAQI
20th Jul 2025204 AMAQI
19°C15/23°C
20th Jul 2025245 AMAQI
20th Jul 2025336 AMAQI
20th Jul 2025207 AMAQI
20th Jul 2025228 AMAQI
20th Jul 2025209 AMAQI
20th Jul 20251910 AMAQI
20th Jul 20252411 AMAQI
20th Jul 20252412 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025242 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025205 PMAQI
20th Jul 2025206 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025238 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252310 PMAQI
20th Jul 20252111 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025201 AMAQI
21st Jul 2025172 AMAQI
21st Jul 2025203 AMAQI
21st Jul 2025284 AMAQI
20°C18/22°C
21st Jul 2025245 AMAQI
21st Jul 2025406 AMAQI
21st Jul 2025427 AMAQI
21st Jul 2025488 AMAQI
21st Jul 2025429 AMAQI
21st Jul 20253610 AMAQI
21st Jul 20252511 AMAQI
21st Jul 20252012 PMAQI
21st Jul 2025181 PMAQI
21st Jul 2025192 PMAQI
21st Jul 2025213 PMAQI
21st Jul 2025224 PMAQI
21st Jul 2025225 PMAQI
21st Jul 2025236 PMAQI
21st Jul 2025227 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025259 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252111 PMAQI
22nd Jul 20252012 AMAQI
22nd Jul 2025161 AMAQI
22nd Jul 2025132 AMAQI
22nd Jul 2025143 AMAQI
22nd Jul 2025124 AMAQI
20°C17/24°C
22nd Jul 2025125 AMAQI
22nd Jul 2025146 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025149 AMAQI
22nd Jul 20251410 AMAQI
22nd Jul 20251411 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025152 PMAQI
22nd Jul 2025143 PMAQI
22nd Jul 2025124 PMAQI
22nd Jul 2025145 PMAQI
22nd Jul 2025156 PMAQI
22nd Jul 2025167 PMAQI
22nd Jul 2025158 PMAQI
22nd Jul 2025159 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20251711 PMAQI
23rd Jul 20251912 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025162 AMAQI
23rd Jul 2025183 AMAQI
23rd Jul 2025164 AMAQI
18°C13/23°C
23rd Jul 2025185 AMAQI
23rd Jul 2025196 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025268 AMAQI
23rd Jul 2025279 AMAQI
23rd Jul 20253210 AMAQI
23rd Jul 20253211 AMAQI
23rd Jul 20253112 PMAQI
23rd Jul 2025271 PMAQI
23rd Jul 2025272 PMAQI
23rd Jul 2025283 PMAQI
23rd Jul 2025294 PMAQI
23rd Jul 2025295 PMAQI
23rd Jul 2025276 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025239 PMAQI
23rd Jul 20253010 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025261 AMAQI
24th Jul 2025242 AMAQI
24th Jul 2025263 AMAQI
24th Jul 2025244 AMAQI
19°C17/23°C
24th Jul 2025275 AMAQI
24th Jul 2025316 AMAQI
24th Jul 2025287 AMAQI
24th Jul 2025298 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253410 AMAQI
24th Jul 20253211 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025362 PMAQI
24th Jul 2025383 PMAQI
24th Jul 2025384 PMAQI
24th Jul 2025395 PMAQI
24th Jul 2025426 PMAQI
24th Jul 2025357 PMAQI
24th Jul 2025358 PMAQI
24th Jul 2025449 PMAQI
24th Jul 20254010 PMAQI
24th Jul 20254011 PMAQI
25th Jul 20253712 AMAQI
25th Jul 2025371 AMAQI
25th Jul 2025462 AMAQI
25th Jul 2025473 AMAQI
25th Jul 2025504 AMAQI
21°C17/26°C
25th Jul 2025535 AMAQI
25th Jul 2025496 AMAQI
25th Jul 2025517 AMAQI
25th Jul 2025528 AMAQI
25th Jul 2025549 AMAQI
25th Jul 20255410 AMAQI
25th Jul 20255411 AMAQI
25th Jul 20255212 PMAQI
25th Jul 2025521 PMAQI
25th Jul 2025552 PMAQI
25th Jul 2025513 PMAQI
25th Jul 2025484 PMAQI
25th Jul 2025435 PMAQI
25th Jul 2025406 PMAQI
25th Jul 2025457 PMAQI
25th Jul 2025448 PMAQI
25th Jul 2025399 PMAQI
25th Jul 20254810 PMAQI
25th Jul 20255611 PMAQI
26th Jul 20256412 AMAQI
26th Jul 20251211 AMAQI
26th Jul 20251462 AMAQI
26th Jul 20251523 AMAQI
26th Jul 20251564 AMAQI
23°C20/27°C
26th Jul 20251505 AMAQI
26th Jul 20251486 AMAQI
26th Jul 20251547 AMAQI
26th Jul 20251428 AMAQI
26th Jul 20251309 AMAQI
26th Jul 202511610 AMAQI
26th Jul 202510411 AMAQI
26th Jul 20259812 PMAQI
26th Jul 2025831 PMAQI
26th Jul 2025862 PMAQI
26th Jul 2025843 PMAQI
26th Jul 2025884 PMAQI
26th Jul 2025925 PMAQI
26th Jul 2025886 PMAQI
26th Jul 20251007 PMAQI
26th Jul 2025898 PMAQI
26th Jul 2025869 PMAQI
26th Jul 20258710 PMAQI
26th Jul 20258911 PMAQI
27th Jul 20258412 AMAQI
27th Jul 2025621 AMAQI
27th Jul 2025652 AMAQI
27th Jul 2025703 AMAQI
27th Jul 2025724 AMAQI
20°C17/25°C
27th Jul 2025735 AMAQI
27th Jul 2025766 AMAQI
27th Jul 2025787 AMAQI
27th Jul 2025798 AMAQI
27th Jul 2025819 AMAQI
27th Jul 20258710 AMAQI
27th Jul 20259011 AMAQI
27th Jul 20258812 PMAQI
27th Jul 2025851 PMAQI
27th Jul 2025782 PMAQI
27th Jul 2025853 PMAQI
27th Jul 2025794 PMAQI
27th Jul 2025805 PMAQI
27th Jul 2025766 PMAQI
27th Jul 2025747 PMAQI
27th Jul 2025768 PMAQI
27th Jul 2025729 PMAQI
27th Jul 20257210 PMAQI
27th Jul 20257211 PMAQI
28th Jul 20257212 AMAQI
28th Jul 2025671 AMAQI
28th Jul 2025582 AMAQI
28th Jul 2025563 AMAQI
28th Jul 2025564 AMAQI
18°C16/20°C
28th Jul 2025525 AMAQI
28th Jul 2025486 AMAQI
28th Jul 2025577 AMAQI
28th Jul 2025558 AMAQI
28th Jul 2025569 AMAQI
28th Jul 20255610 AMAQI
28th Jul 20255611 AMAQI
28th Jul 20255712 PMAQI
28th Jul 2025571 PMAQI
28th Jul 2025592 PMAQI
28th Jul 2025603 PMAQI
28th Jul 2025594 PMAQI
28th Jul 2025605 PMAQI
28th Jul 2025606 PMAQI
28th Jul 2025607 PMAQI
28th Jul 2025598 PMAQI
28th Jul 2025589 PMAQI
28th Jul 20255710 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255712 AMAQI
29th Jul 2025571 AMAQI
29th Jul 2025542 AMAQI
29th Jul 2025543 AMAQI
29th Jul 2025574 AMAQI
19°C16/22°C
29th Jul 2025575 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025607 AMAQI
29th Jul 2025598 AMAQI
29th Jul 2025609 AMAQI
29th Jul 20256210 AMAQI
29th Jul 20255811 AMAQI
29th Jul 20256212 PMAQI
29th Jul 2025591 PMAQI
29th Jul 2025582 PMAQI
29th Jul 2025593 PMAQI
29th Jul 2025584 PMAQI
29th Jul 2025585 PMAQI
29th Jul 2025576 PMAQI
29th Jul 2025577 PMAQI
29th Jul 2025578 PMAQI
29th Jul 2025559 PMAQI
29th Jul 20255310 PMAQI
29th Jul 20255311 PMAQI
30th Jul 20255312 AMAQI
30th Jul 2025421 AMAQI
30th Jul 2025372 AMAQI
30th Jul 2025383 AMAQI
30th Jul 2025364 AMAQI
23°C17/30°C
30th Jul 2025365 AMAQI
30th Jul 2025396 AMAQI
30th Jul 2025417 AMAQI
30th Jul 2025498 AMAQI
30th Jul 2025529 AMAQI
30th Jul 20255210 AMAQI
30th Jul 20255311 AMAQI
30th Jul 20255412 PMAQI
30th Jul 2025521 PMAQI
30th Jul 2025472 PMAQI
30th Jul 2025463 PMAQI
30th Jul 2025464 PMAQI
30th Jul 2025465 PMAQI
30th Jul 2025466 PMAQI
30th Jul 2025467 PMAQI
30th Jul 2025468 PMAQI
30th Jul 2025539 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255411 PMAQI
31st Jul 20255412 AMAQI
31st Jul 2025521 AMAQI
31st Jul 2025522 AMAQI
31st Jul 2025523 AMAQI
31st Jul 2025554 AMAQI
21°C19/23°C
31st Jul 2025545 AMAQI
31st Jul 2025566 AMAQI
31st Jul 2025617 AMAQI
31st Jul 2025648 AMAQI
31st Jul 2025709 AMAQI
31st Jul 20257410 AMAQI
31st Jul 20258011 AMAQI
31st Jul 20258312 PMAQI
31st Jul 2025841 PMAQI
31st Jul 2025862 PMAQI
31st Jul 2025803 PMAQI
31st Jul 2025784 PMAQI
31st Jul 2025805 PMAQI
31st Jul 2025816 PMAQI
31st Jul 2025647 PMAQI
31st Jul 2025758 PMAQI
31st Jul 2025819 PMAQI
31st Jul 20258310 PMAQI
31st Jul 20258111 PMAQI
1st Aug 20257712 AMAQI
1st Aug 2025741 AMAQI
1st Aug 2025712 AMAQI
1st Aug 2025693 AMAQI
1st Aug 2025734 AMAQI
18°C16/20°C
1st Aug 2025695 AMAQI
1st Aug 2025706 AMAQI
1st Aug 2025647 AMAQI
1st Aug 2025598 AMAQI
1st Aug 2025539 AMAQI
1st Aug 20254710 AMAQI
1st Aug 20253411 AMAQI
1st Aug 20253412 PMAQI
1st Aug 2025331 PMAQI
1st Aug 2025292 PMAQI
1st Aug 2025243 PMAQI
1st Aug 2025204 PMAQI
1st Aug 2025185 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025577 PMAQI
1st Aug 2025408 PMAQI
1st Aug 2025249 PMAQI
1st Aug 20252710 PMAQI
1st Aug 20253811 PMAQI
2nd Aug 20254412 AMAQI
2nd Aug 2025351 AMAQI
2nd Aug 2025282 AMAQI
2nd Aug 2025253 AMAQI
2nd Aug 2025214 AMAQI
18°C16/21°C
2nd Aug 2025195 AMAQI
2nd Aug 2025186 AMAQI
2nd Aug 2025207 AMAQI
2nd Aug 2025218 AMAQI
2nd Aug 2025229 AMAQI
2nd Aug 20252310 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025221 PMAQI
2nd Aug 2025202 PMAQI
2nd Aug 2025203 PMAQI
2nd Aug 2025204 PMAQI
2nd Aug 2025205 PMAQI
2nd Aug 2025226 PMAQI
2nd Aug 2025227 PMAQI
2nd Aug 2025238 PMAQI
2nd Aug 2025289 PMAQI
2nd Aug 20253410 PMAQI
2nd Aug 20253611 PMAQI
3rd Aug 20254212 AMAQI
3rd Aug 2025421 AMAQI
3rd Aug 2025352 AMAQI
3rd Aug 2025323 AMAQI
3rd Aug 2025294 AMAQI
19°C15/24°C
3rd Aug 2025305 AMAQI
3rd Aug 2025366 AMAQI
3rd Aug 2025427 AMAQI
3rd Aug 2025488 AMAQI
3rd Aug 2025579 AMAQI
3rd Aug 20255810 AMAQI
3rd Aug 20256011 AMAQI
3rd Aug 20256712 PMAQI
3rd Aug 2025741 PMAQI
3rd Aug 2025802 PMAQI
3rd Aug 2025833 PMAQI
3rd Aug 2025804 PMAQI
3rd Aug 2025805 PMAQI
3rd Aug 2025746 PMAQI
3rd Aug 2025557 PMAQI
3rd Aug 2025608 PMAQI
3rd Aug 2025609 PMAQI
3rd Aug 20255510 PMAQI
3rd Aug 20254911 PMAQI
4th Aug 20254812 AMAQI
4th Aug 2025541 AMAQI
4th Aug 2025572 AMAQI
4th Aug 2025543 AMAQI
4th Aug 2025574 AMAQI
20°C15/24°C
4th Aug 2025565 AMAQI
4th Aug 2025596 AMAQI
4th Aug 2025637 AMAQI
4th Aug 2025688 AMAQI
4th Aug 2025749 AMAQI
4th Aug 20258410 AMAQI
4th Aug 20259211 AMAQI
4th Aug 20259412 PMAQI
4th Aug 20251031 PMAQI
4th Aug 20251102 PMAQI
4th Aug 20251093 PMAQI
4th Aug 20251154 PMAQI
4th Aug 20251085 PMAQI
4th Aug 20251106 PMAQI
4th Aug 2025717 PMAQI
4th Aug 2025928 PMAQI
4th Aug 20251019 PMAQI
4th Aug 202511210 PMAQI
4th Aug 202511011 PMAQI
5th Aug 202512112 AMAQI
5th Aug 20251211 AMAQI
5th Aug 20251162 AMAQI
5th Aug 20251153 AMAQI
5th Aug 20251164 AMAQI
21°C17/26°C
5th Aug 20251155 AMAQI
5th Aug 2025976 AMAQI
5th Aug 2025837 AMAQI
5th Aug 2025728 AMAQI
5th Aug 2025619 AMAQI
5th Aug 20255210 AMAQI
5th Aug 20253811 AMAQI
5th Aug 20253412 PMAQI
5th Aug 2025261 PMAQI
5th Aug 2025322 PMAQI
5th Aug 2025383 PMAQI
5th Aug 2025394 PMAQI
5th Aug 2025365 PMAQI
5th Aug 2025426 PMAQI
5th Aug 2025667 PMAQI
5th Aug 2025558 PMAQI
5th Aug 2025429 PMAQI
5th Aug 20254410 PMAQI
5th Aug 20254611 PMAQI
6th Aug 20254612 AMAQI
6th Aug 2025491 AMAQI
6th Aug 2025452 AMAQI
6th Aug 2025443 AMAQI
6th Aug 2025404 AMAQI
20°C18/23°C
6th Aug 2025385 AMAQI
6th Aug 2025426 AMAQI
6th Aug 2025487 AMAQI
6th Aug 2025498 AMAQI
6th Aug 2025509 AMAQI
6th Aug 20254610 AMAQI
6th Aug 20254211 AMAQI
6th Aug 20254312 PMAQI
6th Aug 2025481 PMAQI
6th Aug 2025552 PMAQI
6th Aug 2025553 PMAQI
6th Aug 2025564 PMAQI
6th Aug 2025615 PMAQI
6th Aug 2025646 PMAQI
6th Aug 2025487 PMAQI
6th Aug 2025568 PMAQI
6th Aug 2025589 PMAQI
6th Aug 20255810 PMAQI
6th Aug 20256211 PMAQI
7th Aug 20255712 AMAQI
7th Aug 2025661 AMAQI
7th Aug 2025662 AMAQI
7th Aug 2025643 AMAQI
7th Aug 2025684 AMAQI
18°C17/20°C
7th Aug 2025675 AMAQI
7th Aug 2025716 AMAQI
7th Aug 2025697 AMAQI
7th Aug 2025688 AMAQI
7th Aug 2025699 AMAQI
7th Aug 20256810 AMAQI
7th Aug 20256411 AMAQI
7th Aug 20256012 PMAQI
7th Aug 2025661 PMAQI
7th Aug 2025622 PMAQI
7th Aug 2025623 PMAQI
7th Aug 2025624 PMAQI
7th Aug 2025605 PMAQI
7th Aug 2025596 PMAQI
7th Aug 2025647 PMAQI
7th Aug 2025628 PMAQI
7th Aug 2025589 PMAQI
7th Aug 20255710 PMAQI
7th Aug 20255811 PMAQI
8th Aug 20255412 AMAQI
8th Aug 2025411 AMAQI
8th Aug 2025302 AMAQI
8th Aug 2025203 AMAQI
8th Aug 2025244 AMAQI
18°C14/21°C
8th Aug 2025225 AMAQI
8th Aug 2025266 AMAQI
8th Aug 2025347 AMAQI
8th Aug 2025348 AMAQI
8th Aug 2025339 AMAQI
8th Aug 20253510 AMAQI
8th Aug 20253811 AMAQI
8th Aug 20253612 PMAQI
8th Aug 2025341 PMAQI
8th Aug 2025312 PMAQI
8th Aug 2025313 PMAQI
8th Aug 2025334 PMAQI
8th Aug 2025325 PMAQI
8th Aug 2025326 PMAQI
8th Aug 2025347 PMAQI
8th Aug 2025348 PMAQI
8th Aug 2025319 PMAQI
8th Aug 20253310 PMAQI
8th Aug 20253211 PMAQI
9th Aug 20253312 AMAQI
9th Aug 2025281 AMAQI
9th Aug 2025322 AMAQI
9th Aug 2025283 AMAQI
9th Aug 2025264 AMAQI
20°C18/22°C
9th Aug 2025325 AMAQI
9th Aug 2025346 AMAQI
9th Aug 2025327 AMAQI
9th Aug 2025338 AMAQI
9th Aug 2025329 AMAQI
9th Aug 20253210 AMAQI
9th Aug 20253511 AMAQI
9th Aug 20254212 PMAQI
9th Aug 2025351 PMAQI
9th Aug 2025302 PMAQI
9th Aug 2025353 PMAQI
9th Aug 2025324 PMAQI
9th Aug 2025295 PMAQI
9th Aug 2025266 PMAQI
9th Aug 2025287 PMAQI
9th Aug 2025308 PMAQI
9th Aug 2025269 PMAQI
9th Aug 20252810 PMAQI
9th Aug 20252911 PMAQI
10th Aug 20253412 AMAQI
10th Aug 2025331 AMAQI
10th Aug 2025292 AMAQI
10th Aug 2025233 AMAQI
10th Aug 2025244 AMAQI
19°C17/23°C
10th Aug 2025295 AMAQI
10th Aug 2025286 AMAQI
10th Aug 2025267 AMAQI
10th Aug 2025338 AMAQI
10th Aug 2025349 AMAQI
10th Aug 20253210 AMAQI
10th Aug 20252911 AMAQI
10th Aug 20253212 PMAQI
10th Aug 2025341 PMAQI
10th Aug 2025362 PMAQI
10th Aug 2025373 PMAQI
10th Aug 2025394 PMAQI
10th Aug 2025395 PMAQI
10th Aug 2025366 PMAQI
10th Aug 2025337 PMAQI
10th Aug 2025358 PMAQI
10th Aug 2025399 PMAQI
10th Aug 20253710 PMAQI
10th Aug 20253411 PMAQI
11th Aug 20253312 AMAQI
11th Aug 2025391 AMAQI
11th Aug 2025332 AMAQI
11th Aug 2025293 AMAQI
11th Aug 2025284 AMAQI
19°C17/21°C
11th Aug 2025305 AMAQI
11th Aug 2025326 AMAQI
11th Aug 2025347 AMAQI
11th Aug 2025408 AMAQI
11th Aug 2025489 AMAQI
11th Aug 20255410 AMAQI
11th Aug 20255711 AMAQI
11th Aug 20256012 PMAQI
11th Aug 2025611 PMAQI
11th Aug 2025612 PMAQI
11th Aug 2025633 PMAQI
11th Aug 2025624 PMAQI
11th Aug 2025645 PMAQI
11th Aug 2025636 PMAQI
11th Aug 2025477 PMAQI
11th Aug 2025538 PMAQI
11th Aug 2025609 PMAQI
11th Aug 20256010 PMAQI
11th Aug 20256011 PMAQI
12th Aug 20256012 AMAQI
12th Aug 2025601 AMAQI
12th Aug 2025602 AMAQI
12th Aug 2025593 AMAQI
12th Aug 2025614 AMAQI
20°C18/22°C
12th Aug 2025615 AMAQI
5 AM12th Aug 2025606 AMAQI
12th Aug 2025637 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
44AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
44AQI
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. 44), while the lowest AQI was between 5 AM to 8 PM (Avg. 44).
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
Portland Deering Oaks, Portland, Maine, United States
2025
93%
207
7%
15
0.4%
1
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Good
207 DaysModerate
15 DaysPoor
1 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% of 224 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Portland Deering Oaks, Portland, Maine, 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
24AQI
24AQI
2nd January 2025
20AQI
20AQI
3rd January 2025
19AQI
19AQI
4th January 2025
18AQI
18AQI
5th January 2025
19AQI
19AQI
6th January 2025
20AQI
20AQI
7th January 2025
19AQI
19AQI
8th January 2025
17AQI
17AQI
9th January 2025
18AQI
18AQI
10th January 2025
20AQI
20AQI
11th January 2025
25AQI
25AQI
12th January 2025
31AQI
31AQI
13th January 2025
41AQI
41AQI
14th January 2025
25AQI
25AQI
15th January 2025
22AQI
22AQI
16th January 2025
37AQI
37AQI
17th January 2025
43AQI
43AQI
18th January 2025
34AQI
34AQI
19th January 2025
22AQI
22AQI
20th January 2025
23AQI
23AQI
21st January 2025
36AQI
36AQI
22nd January 2025
50AQI
50AQI
23rd January 2025
47AQI
47AQI
24th January 2025
45AQI
45AQI
25th January 2025
39AQI
39AQI
26th January 2025
36AQI
36AQI
27th January 2025
22AQI
22AQI
28th January 2025
21AQI
21AQI
29th January 2025
26AQI
26AQI
30th January 2025
24AQI
24AQI
31st January 2025
31AQI
31AQI
1st February 2025
21AQI
21AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
33AQI
33AQI
4th February 2025
23AQI
23AQI
5th February 2025
27AQI
27AQI
6th February 2025
38AQI
38AQI
7th February 2025
27AQI
27AQI
8th February 2025
26AQI
26AQI
9th February 2025
23AQI
23AQI
10th February 2025
30AQI
30AQI
11th February 2025
40AQI
40AQI
12th February 2025
29AQI
29AQI
13th February 2025
23AQI
23AQI
14th February 2025
22AQI
22AQI
15th February 2025
22AQI
22AQI
16th February 2025
20AQI
20AQI
17th February 2025
19AQI
19AQI
18th February 2025
19AQI
19AQI
19th February 2025
25AQI
25AQI
20th February 2025
26AQI
26AQI
21st February 2025
20AQI
20AQI
22nd February 2025
26AQI
26AQI
23rd February 2025
30AQI
30AQI
24th February 2025
43AQI
43AQI
25th February 2025
44AQI
44AQI
26th February 2025
32AQI
32AQI
27th February 2025
29AQI
29AQI
28th February 2025
21AQI
21AQI
1st March 2025
27AQI
27AQI
2nd March 2025
20AQI
20AQI
3rd March 2025
28AQI
28AQI
4th March 2025
37AQI
37AQI
5th March 2025
33AQI
33AQI
6th March 2025
20AQI
20AQI
7th March 2025
18AQI
18AQI
8th March 2025
20AQI
20AQI
9th March 2025
20AQI
20AQI
10th March 2025
23AQI
23AQI
11th March 2025
28AQI
28AQI
12th March 2025
21AQI
21AQI
13th March 2025
22AQI
22AQI
14th March 2025
29AQI
29AQI
15th March 2025
24AQI
24AQI
16th March 2025
28AQI
28AQI
17th March 2025
21AQI
21AQI
18th March 2025
23AQI
23AQI
19th March 2025
24AQI
24AQI
20th March 2025
15AQI
15AQI
21st March 2025
14AQI
14AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
17AQI
17AQI
24th March 2025
20AQI
20AQI
25th March 2025
23AQI
23AQI
26th March 2025
23AQI
23AQI
27th March 2025
19AQI
19AQI
28th March 2025
20AQI
20AQI
29th March 2025
18AQI
18AQI
30th March 2025
25AQI
25AQI
31st March 2025
23AQI
23AQI
1st April 2025
18AQI
18AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
21AQI
21AQI
4th April 2025
21AQI
21AQI
5th April 2025
20AQI
20AQI
6th April 2025
13AQI
13AQI
7th April 2025
15AQI
15AQI
8th April 2025
15AQI
15AQI
9th April 2025
18AQI
18AQI
10th April 2025
20AQI
20AQI
11th April 2025
21AQI
21AQI
12th April 2025
16AQI
16AQI
13th April 2025
20AQI
20AQI
14th April 2025
17AQI
17AQI
15th April 2025
31AQI
31AQI
16th April 2025
18AQI
18AQI
17th April 2025
18AQI
18AQI
18th April 2025
23AQI
23AQI
19th April 2025
42AQI
42AQI
20th April 2025
16AQI
16AQI
21st April 2025
15AQI
15AQI
22nd April 2025
25AQI
25AQI
23rd April 2025
18AQI
18AQI
24th April 2025
18AQI
18AQI
25th April 2025
26AQI
26AQI
26th April 2025
22AQI
22AQI
27th April 2025
12AQI
12AQI
28th April 2025
17AQI
17AQI
29th April 2025
33AQI
33AQI
30th April 2025
21AQI
21AQI
1st May 2025
18AQI
18AQI
2nd May 2025
29AQI
29AQI
3rd May 2025
33AQI
33AQI
4th May 2025
23AQI
23AQI
5th May 2025
21AQI
21AQI
6th May 2025
18AQI
18AQI
7th May 2025
25AQI
25AQI
8th May 2025
25AQI
25AQI
9th May 2025
20AQI
20AQI
10th May 2025
13AQI
13AQI
11th May 2025
15AQI
15AQI
12th May 2025
20AQI
20AQI
13th May 2025
24AQI
24AQI
14th May 2025
27AQI
27AQI
15th May 2025
37AQI
37AQI
16th May 2025
33AQI
33AQI
17th May 2025
19AQI
19AQI
18th May 2025
14AQI
14AQI
19th May 2025
13AQI
13AQI
20th May 2025
12AQI
12AQI
21st May 2025
16AQI
16AQI
22nd May 2025
18AQI
18AQI
23rd May 2025
11AQI
11AQI
24th May 2025
11AQI
11AQI
25th May 2025
13AQI
13AQI
26th May 2025
16AQI
16AQI
27th May 2025
22AQI
22AQI
28th May 2025
28AQI
28AQI
29th May 2025
21AQI
21AQI
30th May 2025
23AQI
23AQI
31st May 2025
22AQI
22AQI
1st June 2025
21AQI
21AQI
2nd June 2025
21AQI
21AQI
3rd June 2025
22AQI
22AQI
4th June 2025
43AQI
43AQI
5th June 2025
62AQI
62AQI
6th June 2025
57AQI
57AQI
7th June 2025
50AQI
50AQI
8th June 2025
78AQI
78AQI
9th June 2025
78AQI
78AQI
10th June 2025
36AQI
36AQI
11th June 2025
42AQI
42AQI
12th June 2025
64AQI
64AQI
13th June 2025
37AQI
37AQI
14th June 2025
34AQI
34AQI
15th June 2025
31AQI
31AQI
16th June 2025
27AQI
27AQI
17th June 2025
24AQI
24AQI
18th June 2025
20AQI
20AQI
19th June 2025
30AQI
30AQI
20th June 2025
33AQI
33AQI
21st June 2025
29AQI
29AQI
22nd June 2025
36AQI
36AQI
23rd June 2025
47AQI
47AQI
24th June 2025
54AQI
54AQI
25th June 2025
50AQI
50AQI
26th June 2025
31AQI
31AQI
27th June 2025
25AQI
25AQI
28th June 2025
20AQI
20AQI
29th June 2025
23AQI
23AQI
30th June 2025
26AQI
26AQI
1st July 2025
36AQI
36AQI
2nd July 2025
33AQI
33AQI
3rd July 2025
45AQI
45AQI
4th July 2025
39AQI
39AQI
5th July 2025
33AQI
33AQI
6th July 2025
45AQI
45AQI
7th July 2025
53AQI
53AQI
8th July 2025
36AQI
36AQI
9th July 2025
28AQI
28AQI
10th July 2025
25AQI
25AQI
11th July 2025
21AQI
21AQI
12th July 2025
22AQI
22AQI
13th July 2025
19AQI
19AQI
14th July 2025
20AQI
20AQI
15th July 2025
31AQI
31AQI
16th July 2025
39AQI
39AQI
17th July 2025
34AQI
34AQI
18th July 2025
18AQI
18AQI
19th July 2025
26AQI
26AQI
20th July 2025
22AQI
22AQI
21st July 2025
25AQI
25AQI
22nd July 2025
15AQI
15AQI
23rd July 2025
24AQI
24AQI
24th July 2025
33AQI
33AQI
25th July 2025
47AQI
47AQI
26th July 2025
111AQI
111AQI
27th July 2025
76AQI
76AQI
28th July 2025
58AQI
58AQI
29th July 2025
57AQI
57AQI
30th July 2025
46AQI
46AQI
31st July 2025
69AQI
69AQI
1st August 2025
48AQI
48AQI
2nd August 2025
25AQI
25AQI
3rd August 2025
53AQI
53AQI
4th August 2025
82AQI
82AQI
5th August 2025
71AQI
71AQI
6th August 2025
50AQI
50AQI
7th August 2025
63AQI
63AQI
8th August 2025
32AQI
32AQI
9th August 2025
30AQI
30AQI
10th August 2025
33AQI
33AQI
11th August 2025
41AQI
41AQI
28AQI
27AQI
23AQI
20AQI
21AQI
38AQI
38AQI
48AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202529AQI
31
28
31
30
31
24
6
25
5
1
7
4
207
15
1
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
April20AQI
202424AQI
31
29
31
30
31
26
3
29
2
26
5
30
31
30
29
2
353
12
Highest AQI recorded in
July34AQI
Lowest AQI recorded in
March17AQI
202326AQI
31
28
31
30
31
26
4
24
7
27
4
22
8
30
1
28
1
30
1
338
26
Highest AQI recorded in
July38AQI
Lowest AQI recorded in
January19AQI
202222AQI
29
1
21
31
30
31
30
24
1
1
29
31
30
25
2
312
4
Highest AQI recorded in
July30AQI
Lowest AQI recorded in
August14AQI
202123AQI
29
1
28
31
28
20
29
1
28
3
28
3
30
31
30
31
343
8
Highest AQI recorded in
June29AQI
Lowest AQI recorded in
September18AQI
202026AQI
11
3
13
29
2
56
2
Highest AQI recorded in
December28AQI
Lowest AQI recorded in
November23AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
29AQILeast Polluted Year Recorded
2022(Avg.)
22AQIPortland Deering Oaks's annual 2025 AQI (29) shows an average percentage change of 20.8% (worsened AQI) compared to previous years: 2020 (26), 2021 (23), 2022 (22), 2023 (26), 2024 (24).
