Portsmouth, New Hampshire, 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
Portsmouth, New Hampshire, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2025
82AQILowest AQI recorded on
20th Aug 2024
14AQISame Day Analysis (7th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 58 of Moderate air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 7th Aug - 8th Aug 2025
Portsmouth, New Hampshire, United States
AQI
Day
Night
.
5 AM7th Aug 2025
8 PM
4 AM8th Aug 2025
Day time
Avg. Highest Time
9AM7th Aug
63AQI
Avg. Lowest Time
6PM7th Aug
55AQI
Night time
Avg. Highest Time
8PM7th Aug
56AQI
Avg. Lowest Time
1AM8th Aug
34AQI
In the last 24 hours,
Portsmouth's AQI reached its highest point of 63 at 9 AM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 7th Aug and 8th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Portsmouth, New Hampshire, United States
JulAug
09th - 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 - 08th08th
Day
Night
9th Jul 2025345 AMAQI
9th Jul 2025346 AMAQI
9th Jul 2025347 AMAQI
9th Jul 2025348 AMAQI
9th Jul 2025329 AMAQI
9th Jul 20253210 AMAQI
9th Jul 20253111 AMAQI
9th Jul 20253012 PMAQI
9th Jul 2025291 PMAQI
9th Jul 2025302 PMAQI
9th Jul 2025323 PMAQI
9th Jul 2025324 PMAQI
9th Jul 2025315 PMAQI
9th Jul 2025326 PMAQI
9th Jul 2025327 PMAQI
9th Jul 2025328 PMAQI
9th Jul 2025329 PMAQI
9th Jul 20253310 PMAQI
9th Jul 20253411 PMAQI
10th Jul 20253312 AMAQI
10th Jul 2025321 AMAQI
10th Jul 2025322 AMAQI
10th Jul 2025313 AMAQI
10th Jul 2025314 AMAQI
20°C18/25°C
10th Jul 2025305 AMAQI
10th Jul 2025286 AMAQI
10th Jul 2025307 AMAQI
10th Jul 2025308 AMAQI
10th Jul 2025309 AMAQI
10th Jul 20253110 AMAQI
10th Jul 20252911 AMAQI
10th Jul 20252712 PMAQI
10th Jul 2025281 PMAQI
10th Jul 2025272 PMAQI
10th Jul 2025283 PMAQI
10th Jul 2025274 PMAQI
10th Jul 2025265 PMAQI
10th Jul 2025266 PMAQI
10th Jul 2025307 PMAQI
10th Jul 2025298 PMAQI
10th Jul 2025279 PMAQI
10th Jul 20252610 PMAQI
10th Jul 20252811 PMAQI
11th Jul 20252612 AMAQI
11th Jul 2025261 AMAQI
11th Jul 2025242 AMAQI
11th Jul 2025223 AMAQI
11th Jul 2025224 AMAQI
18°C17/21°C
11th Jul 2025235 AMAQI
11th Jul 2025226 AMAQI
11th Jul 2025227 AMAQI
11th Jul 2025228 AMAQI
11th Jul 2025249 AMAQI
11th Jul 20252810 AMAQI
11th Jul 20252511 AMAQI
11th Jul 20252412 PMAQI
11th Jul 2025241 PMAQI
11th Jul 2025242 PMAQI
11th Jul 2025263 PMAQI
11th Jul 2025254 PMAQI
11th Jul 2025265 PMAQI
11th Jul 2025246 PMAQI
11th Jul 2025267 PMAQI
11th Jul 2025268 PMAQI
11th Jul 2025269 PMAQI
11th Jul 20252410 PMAQI
11th Jul 20252811 PMAQI
12th Jul 20252812 AMAQI
12th Jul 2025261 AMAQI
12th Jul 2025232 AMAQI
12th Jul 2025253 AMAQI
12th Jul 2025274 AMAQI
19°C16/23°C
12th Jul 2025335 AMAQI
12th Jul 2025356 AMAQI
12th Jul 2025327 AMAQI
12th Jul 2025318 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20253010 AMAQI
12th Jul 20253111 AMAQI
12th Jul 20253112 PMAQI
12th Jul 2025341 PMAQI
12th Jul 2025332 PMAQI
12th Jul 2025303 PMAQI
12th Jul 2025284 PMAQI
12th Jul 2025275 PMAQI
12th Jul 2025276 PMAQI
12th Jul 2025287 PMAQI
12th Jul 2025288 PMAQI
12th Jul 2025279 PMAQI
12th Jul 20252610 PMAQI
12th Jul 20253011 PMAQI
13th Jul 20252612 AMAQI
13th Jul 2025201 AMAQI
13th Jul 2025172 AMAQI
13th Jul 2025173 AMAQI
13th Jul 2025154 AMAQI
20°C18/23°C
13th Jul 2025155 AMAQI
13th Jul 2025166 AMAQI
13th Jul 2025177 AMAQI
13th Jul 2025178 AMAQI
13th Jul 2025229 AMAQI
13th Jul 20251810 AMAQI
13th Jul 20251811 AMAQI
13th Jul 20252212 PMAQI
13th Jul 2025241 PMAQI
13th Jul 2025222 PMAQI
13th Jul 2025203 PMAQI
13th Jul 2025204 PMAQI
13th Jul 2025205 PMAQI
13th Jul 2025206 PMAQI
13th Jul 2025207 PMAQI
13th Jul 2025208 PMAQI
13th Jul 2025219 PMAQI
13th Jul 20251910 PMAQI
13th Jul 20252011 PMAQI
14th Jul 20252212 AMAQI
14th Jul 2025221 AMAQI
14th Jul 2025212 AMAQI
14th Jul 2025223 AMAQI
14th Jul 2025224 AMAQI
20°C18/24°C
14th Jul 2025225 AMAQI
14th Jul 2025276 AMAQI
14th Jul 2025237 AMAQI
14th Jul 2025228 AMAQI
14th Jul 2025229 AMAQI
14th Jul 20252210 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252412 PMAQI
14th Jul 2025251 PMAQI
14th Jul 2025252 PMAQI
14th Jul 2025263 PMAQI
14th Jul 2025264 PMAQI
14th Jul 2025285 PMAQI
14th Jul 2025276 PMAQI
14th Jul 2025257 PMAQI
14th Jul 2025258 PMAQI
14th Jul 2025299 PMAQI
14th Jul 20253010 PMAQI
14th Jul 20253111 PMAQI
15th Jul 20253012 AMAQI
15th Jul 2025281 AMAQI
15th Jul 2025242 AMAQI
15th Jul 2025213 AMAQI
15th Jul 2025184 AMAQI
23°C18/28°C
15th Jul 2025205 AMAQI
15th Jul 2025196 AMAQI
15th Jul 2025247 AMAQI
15th Jul 2025288 AMAQI
15th Jul 2025349 AMAQI
15th Jul 20253410 AMAQI
15th Jul 20253411 AMAQI
15th Jul 20253212 PMAQI
15th Jul 2025351 PMAQI
15th Jul 2025362 PMAQI
15th Jul 2025333 PMAQI
15th Jul 2025344 PMAQI
15th Jul 2025325 PMAQI
15th Jul 2025316 PMAQI
15th Jul 2025297 PMAQI
15th Jul 2025308 PMAQI
15th Jul 2025319 PMAQI
15th Jul 20253010 PMAQI
15th Jul 20253011 PMAQI
16th Jul 20253312 AMAQI
16th Jul 2025311 AMAQI
16th Jul 2025342 AMAQI
16th Jul 2025363 AMAQI
16th Jul 2025394 AMAQI
25°C21/32°C
16th Jul 2025365 AMAQI
16th Jul 2025366 AMAQI
16th Jul 2025387 AMAQI
16th Jul 2025438 AMAQI
16th Jul 2025499 AMAQI
16th Jul 20255410 AMAQI
16th Jul 20255411 AMAQI
16th Jul 20255412 PMAQI
16th Jul 2025551 PMAQI
16th Jul 2025552 PMAQI
16th Jul 2025523 PMAQI
16th Jul 2025524 PMAQI
16th Jul 2025525 PMAQI
16th Jul 2025506 PMAQI
16th Jul 2025447 PMAQI
16th Jul 2025488 PMAQI
16th Jul 2025469 PMAQI
16th Jul 20254610 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254812 AMAQI
17th Jul 2025441 AMAQI
17th Jul 2025412 AMAQI
17th Jul 2025403 AMAQI
17th Jul 2025404 AMAQI
24°C19/32°C
17th Jul 2025405 AMAQI
17th Jul 2025396 AMAQI
17th Jul 2025417 AMAQI
17th Jul 2025428 AMAQI
17th Jul 2025409 AMAQI
17th Jul 20254110 AMAQI
17th Jul 20254111 AMAQI
17th Jul 20254212 PMAQI
17th Jul 2025431 PMAQI
17th Jul 2025432 PMAQI
17th Jul 2025433 PMAQI
17th Jul 2025404 PMAQI
17th Jul 2025395 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025397 PMAQI
17th Jul 2025398 PMAQI
17th Jul 2025349 PMAQI
17th Jul 20253410 PMAQI
17th Jul 20253511 PMAQI
18th Jul 20253112 AMAQI
18th Jul 2025241 AMAQI
18th Jul 2025182 AMAQI
18th Jul 2025173 AMAQI
18th Jul 2025144 AMAQI
25°C21/29°C
18th Jul 2025135 AMAQI
18th Jul 2025146 AMAQI
18th Jul 2025167 AMAQI
18th Jul 2025138 AMAQI
18th Jul 2025149 AMAQI
18th Jul 20251310 AMAQI
18th Jul 20251511 AMAQI
18th Jul 20252812 PMAQI
18th Jul 2025321 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025193 PMAQI
18th Jul 2025184 PMAQI
18th Jul 2025175 PMAQI
18th Jul 2025186 PMAQI
18th Jul 2025197 PMAQI
18th Jul 2025208 PMAQI
18th Jul 2025229 PMAQI
18th Jul 20252010 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025241 AMAQI
19th Jul 2025242 AMAQI
19th Jul 2025263 AMAQI
19th Jul 2025264 AMAQI
24°C20/29°C
19th Jul 2025265 AMAQI
19th Jul 2025276 AMAQI
19th Jul 2025377 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025249 AMAQI
19th Jul 20252410 AMAQI
19th Jul 20252411 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025253 PMAQI
19th Jul 2025254 PMAQI
19th Jul 2025265 PMAQI
19th Jul 2025266 PMAQI
19th Jul 2025247 PMAQI
19th Jul 2025248 PMAQI
19th Jul 2025279 PMAQI
19th Jul 20252510 PMAQI
19th Jul 20252511 PMAQI
20th Jul 20252512 AMAQI
20th Jul 2025241 AMAQI
20th Jul 2025222 AMAQI
20th Jul 2025203 AMAQI
20th Jul 2025204 AMAQI
21°C12/30°C
20th Jul 2025185 AMAQI
20th Jul 2025206 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025198 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252012 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025223 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025238 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252310 PMAQI
20th Jul 20252211 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025222 AMAQI
21st Jul 2025223 AMAQI
21st Jul 2025224 AMAQI
24°C20/33°C
21st Jul 2025265 AMAQI
21st Jul 2025326 AMAQI
21st Jul 2025347 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025419 AMAQI
21st Jul 20254810 AMAQI
21st Jul 20254811 AMAQI
21st Jul 20254112 PMAQI
21st Jul 2025311 PMAQI
21st Jul 2025262 PMAQI
21st Jul 2025263 PMAQI
21st Jul 2025254 PMAQI
21st Jul 2025235 PMAQI
21st Jul 2025236 PMAQI
21st Jul 2025237 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025219 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252012 AMAQI
22nd Jul 2025171 AMAQI
22nd Jul 2025152 AMAQI
22nd Jul 2025163 AMAQI
22nd Jul 2025164 AMAQI
22°C17/27°C
22nd Jul 2025155 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025179 AMAQI
22nd Jul 20251710 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251612 PMAQI
22nd Jul 2025161 PMAQI
22nd Jul 2025162 PMAQI
22nd Jul 2025163 PMAQI
22nd Jul 2025164 PMAQI
22nd Jul 2025165 PMAQI
22nd Jul 2025166 PMAQI
22nd Jul 2025177 PMAQI
22nd Jul 2025188 PMAQI
22nd Jul 2025179 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20251711 PMAQI
23rd Jul 20251812 AMAQI
23rd Jul 2025181 AMAQI
23rd Jul 2025192 AMAQI
23rd Jul 2025193 AMAQI
23rd Jul 2025194 AMAQI
19°C11/24°C
23rd Jul 2025205 AMAQI
23rd Jul 2025216 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252210 AMAQI
23rd Jul 20252211 AMAQI
23rd Jul 20252312 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025222 PMAQI
23rd Jul 2025233 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025226 PMAQI
23rd Jul 2025237 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252311 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025231 AMAQI
24th Jul 2025232 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025234 AMAQI
21°C14/29°C
24th Jul 2025215 AMAQI
24th Jul 2025236 AMAQI
24th Jul 2025237 AMAQI
24th Jul 2025228 AMAQI
24th Jul 2025239 AMAQI
24th Jul 20252410 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025362 PMAQI
24th Jul 2025403 PMAQI
24th Jul 2025404 PMAQI
24th Jul 2025425 PMAQI
24th Jul 2025426 PMAQI
24th Jul 2025307 PMAQI
24th Jul 2025308 PMAQI
24th Jul 2025439 PMAQI
24th Jul 20254210 PMAQI
24th Jul 20253211 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025381 AMAQI
25th Jul 2025382 AMAQI
25th Jul 2025363 AMAQI
25th Jul 2025344 AMAQI
26°C19/34°C
25th Jul 2025335 AMAQI
25th Jul 2025336 AMAQI
25th Jul 2025357 AMAQI
25th Jul 2025418 AMAQI
25th Jul 2025469 AMAQI
25th Jul 20254910 AMAQI
25th Jul 20255011 AMAQI
25th Jul 20255012 PMAQI
25th Jul 2025491 PMAQI
25th Jul 2025502 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025425 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025417 PMAQI
25th Jul 2025408 PMAQI
25th Jul 2025329 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253811 PMAQI
26th Jul 20254912 AMAQI
26th Jul 2025561 AMAQI
26th Jul 2025672 AMAQI
26th Jul 2025903 AMAQI
26th Jul 20251384 AMAQI
27°C22/36°C
26th Jul 20251195 AMAQI
26th Jul 20251256 AMAQI
26th Jul 20251387 AMAQI
26th Jul 20251328 AMAQI
26th Jul 20251369 AMAQI
26th Jul 202510810 AMAQI
26th Jul 202510011 AMAQI
26th Jul 20258412 PMAQI
26th Jul 2025821 PMAQI
26th Jul 2025772 PMAQI
26th Jul 2025803 PMAQI
26th Jul 2025814 PMAQI
26th Jul 2025775 PMAQI
26th Jul 2025806 PMAQI
26th Jul 2025767 PMAQI
26th Jul 2025768 PMAQI
26th Jul 2025779 PMAQI
26th Jul 20257910 PMAQI
26th Jul 20257711 PMAQI
27th Jul 20257412 AMAQI
27th Jul 2025681 AMAQI
27th Jul 2025702 AMAQI
27th Jul 2025743 AMAQI
27th Jul 2025754 AMAQI
24°C17/30°C
27th Jul 2025755 AMAQI
27th Jul 2025736 AMAQI
27th Jul 2025777 AMAQI
27th Jul 2025808 AMAQI
27th Jul 2025819 AMAQI
27th Jul 20258310 AMAQI
27th Jul 20258211 AMAQI
27th Jul 20258512 PMAQI
27th Jul 2025831 PMAQI
27th Jul 2025822 PMAQI
27th Jul 2025843 PMAQI
27th Jul 2025824 PMAQI
27th Jul 2025805 PMAQI
27th Jul 2025806 PMAQI
27th Jul 2025767 PMAQI
27th Jul 2025788 PMAQI
27th Jul 2025729 PMAQI
27th Jul 20257210 PMAQI
27th Jul 20257111 PMAQI
28th Jul 20257012 AMAQI
28th Jul 2025651 AMAQI
28th Jul 2025632 AMAQI
28th Jul 2025633 AMAQI
28th Jul 2025624 AMAQI
22°C17/26°C
28th Jul 2025605 AMAQI
28th Jul 2025636 AMAQI
28th Jul 2025647 AMAQI
28th Jul 2025648 AMAQI
28th Jul 2025619 AMAQI
28th Jul 20256210 AMAQI
28th Jul 20256111 AMAQI
28th Jul 20255912 PMAQI
28th Jul 2025591 PMAQI
28th Jul 2025612 PMAQI
28th Jul 2025623 PMAQI
28th Jul 2025624 PMAQI
28th Jul 2025615 PMAQI
28th Jul 2025616 PMAQI
28th Jul 2025627 PMAQI
28th Jul 2025628 PMAQI
28th Jul 2025609 PMAQI
28th Jul 20255810 PMAQI
28th Jul 20255911 PMAQI
29th Jul 20255712 AMAQI
29th Jul 2025531 AMAQI
29th Jul 2025522 AMAQI
29th Jul 2025523 AMAQI
29th Jul 2025544 AMAQI
22°C16/31°C
29th Jul 2025535 AMAQI
29th Jul 2025546 AMAQI
29th Jul 2025547 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025589 AMAQI
29th Jul 20255910 AMAQI
29th Jul 20255811 AMAQI
29th Jul 20255812 PMAQI
29th Jul 2025571 PMAQI
29th Jul 2025562 PMAQI
29th Jul 2025573 PMAQI
29th Jul 2025574 PMAQI
29th Jul 2025565 PMAQI
29th Jul 2025566 PMAQI
29th Jul 2025567 PMAQI
29th Jul 2025568 PMAQI
29th Jul 2025559 PMAQI
29th Jul 20255410 PMAQI
29th Jul 20255411 PMAQI
30th Jul 20255412 AMAQI
30th Jul 2025501 AMAQI
30th Jul 2025482 AMAQI
30th Jul 2025463 AMAQI
30th Jul 2025484 AMAQI
28°C19/37°C
30th Jul 2025505 AMAQI
30th Jul 2025506 AMAQI
30th Jul 2025517 AMAQI
30th Jul 2025528 AMAQI
30th Jul 2025529 AMAQI
30th Jul 20255310 AMAQI
30th Jul 20255211 AMAQI
30th Jul 20255312 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 2025549 PMAQI
30th Jul 20255410 PMAQI
30th Jul 20255411 PMAQI
31st Jul 20255312 AMAQI
31st Jul 2025551 AMAQI
31st Jul 2025542 AMAQI
31st Jul 2025533 AMAQI
31st Jul 2025554 AMAQI
26°C21/33°C
31st Jul 2025565 AMAQI
31st Jul 2025566 AMAQI
31st Jul 2025567 AMAQI
31st Jul 2025628 AMAQI
31st Jul 2025709 AMAQI
31st Jul 20257310 AMAQI
31st Jul 20258111 AMAQI
31st Jul 20258512 PMAQI
31st Jul 2025881 PMAQI
31st Jul 2025902 PMAQI
31st Jul 2025903 PMAQI
31st Jul 2025884 PMAQI
31st Jul 2025905 PMAQI
31st Jul 2025896 PMAQI
31st Jul 2025637 PMAQI
31st Jul 2025758 PMAQI
31st Jul 2025919 PMAQI
31st Jul 20259110 PMAQI
31st Jul 20259111 PMAQI
1st Aug 20258212 AMAQI
1st Aug 2025761 AMAQI
1st Aug 2025752 AMAQI
1st Aug 2025783 AMAQI
1st Aug 2025764 AMAQI
21°C16/23°C
1st Aug 2025765 AMAQI
1st Aug 2025746 AMAQI
1st Aug 2025727 AMAQI
1st Aug 2025688 AMAQI
1st Aug 2025649 AMAQI
1st Aug 20255810 AMAQI
1st Aug 20255611 AMAQI
1st Aug 20255612 PMAQI
1st Aug 2025501 PMAQI
1st Aug 2025462 PMAQI
1st Aug 2025423 PMAQI
1st Aug 2025354 PMAQI
1st Aug 2025285 PMAQI
1st Aug 2025236 PMAQI
1st Aug 2025687 PMAQI
1st Aug 2025458 PMAQI
1st Aug 2025259 PMAQI
1st Aug 20253210 PMAQI
1st Aug 20252911 PMAQI
2nd Aug 20253012 AMAQI
2nd Aug 2025351 AMAQI
2nd Aug 2025302 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025304 AMAQI
19°C15/24°C
2nd Aug 2025285 AMAQI
2nd Aug 2025276 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025278 AMAQI
2nd Aug 2025249 AMAQI
2nd Aug 20252210 AMAQI
2nd Aug 20252111 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025211 PMAQI
2nd Aug 2025202 PMAQI
2nd Aug 2025203 PMAQI
2nd Aug 2025194 PMAQI
2nd Aug 2025215 PMAQI
2nd Aug 2025206 PMAQI
2nd Aug 2025227 PMAQI
2nd Aug 2025228 PMAQI
2nd Aug 2025299 PMAQI
2nd Aug 20252910 PMAQI
2nd Aug 20253211 PMAQI
3rd Aug 20253512 AMAQI
3rd Aug 2025381 AMAQI
3rd Aug 2025392 AMAQI
3rd Aug 2025383 AMAQI
3rd Aug 2025374 AMAQI
19°C13/26°C
3rd Aug 2025365 AMAQI
3rd Aug 2025366 AMAQI
3rd Aug 2025387 AMAQI
3rd Aug 2025428 AMAQI
3rd Aug 2025509 AMAQI
3rd Aug 20255710 AMAQI
3rd Aug 20256011 AMAQI
3rd Aug 20256512 PMAQI
3rd Aug 2025701 PMAQI
3rd Aug 2025722 PMAQI
3rd Aug 2025773 PMAQI
3rd Aug 2025744 PMAQI
3rd Aug 2025755 PMAQI
3rd Aug 2025726 PMAQI
3rd Aug 2025487 PMAQI
3rd Aug 2025578 PMAQI
3rd Aug 2025589 PMAQI
3rd Aug 20255510 PMAQI
3rd Aug 20254611 PMAQI
4th Aug 20254412 AMAQI
4th Aug 2025491 AMAQI
4th Aug 2025572 AMAQI
4th Aug 2025543 AMAQI
4th Aug 2025564 AMAQI
22°C12/31°C
4th Aug 2025595 AMAQI
4th Aug 2025616 AMAQI
4th Aug 2025687 AMAQI
4th Aug 2025778 AMAQI
4th Aug 2025809 AMAQI
4th Aug 20258310 AMAQI
4th Aug 20258911 AMAQI
4th Aug 20258812 PMAQI
4th Aug 2025941 PMAQI
4th Aug 2025982 PMAQI
4th Aug 20251033 PMAQI
4th Aug 20251054 PMAQI
4th Aug 20251055 PMAQI
4th Aug 20251036 PMAQI
4th Aug 2025767 PMAQI
4th Aug 2025898 PMAQI
4th Aug 2025969 PMAQI
4th Aug 20259810 PMAQI
4th Aug 20259611 PMAQI
5th Aug 20259612 AMAQI
5th Aug 20251041 AMAQI
5th Aug 2025982 AMAQI
5th Aug 20251103 AMAQI
5th Aug 20251144 AMAQI
23°C16/32°C
5th Aug 20251215 AMAQI
5th Aug 20251106 AMAQI
5th Aug 20251097 AMAQI
5th Aug 20251168 AMAQI
5th Aug 20251049 AMAQI
5th Aug 20259810 AMAQI
5th Aug 20258111 AMAQI
5th Aug 20257112 PMAQI
5th Aug 2025591 PMAQI
5th Aug 2025592 PMAQI
5th Aug 2025583 PMAQI
5th Aug 2025544 PMAQI
5th Aug 2025535 PMAQI
5th Aug 2025496 PMAQI
5th Aug 2025947 PMAQI
5th Aug 2025728 PMAQI
5th Aug 2025429 PMAQI
5th Aug 20254310 PMAQI
5th Aug 20254111 PMAQI
6th Aug 20254412 AMAQI
6th Aug 2025461 AMAQI
6th Aug 2025442 AMAQI
6th Aug 2025473 AMAQI
6th Aug 2025444 AMAQI
21°C16/24°C
6th Aug 2025485 AMAQI
6th Aug 2025466 AMAQI
6th Aug 2025457 AMAQI
6th Aug 2025468 AMAQI
6th Aug 2025469 AMAQI
6th Aug 20254810 AMAQI
6th Aug 20254711 AMAQI
6th Aug 20254212 PMAQI
6th Aug 2025371 PMAQI
6th Aug 2025382 PMAQI
6th Aug 2025363 PMAQI
6th Aug 2025404 PMAQI
6th Aug 2025425 PMAQI
6th Aug 2025486 PMAQI
6th Aug 2025457 PMAQI
6th Aug 2025488 PMAQI
6th Aug 2025549 PMAQI
6th Aug 20255610 PMAQI
6th Aug 20255611 PMAQI
7th Aug 20255412 AMAQI
7th Aug 2025561 AMAQI
7th Aug 2025562 AMAQI
7th Aug 2025573 AMAQI
7th Aug 2025604 AMAQI
19°C14/25°C
7th Aug 2025585 AMAQI
7th Aug 2025606 AMAQI
7th Aug 2025597 AMAQI
7th Aug 2025598 AMAQI
7th Aug 2025639 AMAQI
7th Aug 20256310 AMAQI
7th Aug 20256311 AMAQI
7th Aug 20256312 PMAQI
7th Aug 2025631 PMAQI
7th Aug 2025622 PMAQI
7th Aug 2025593 PMAQI
7th Aug 2025564 PMAQI
7th Aug 2025565 PMAQI
7th Aug 2025556 PMAQI
7th Aug 2025567 PMAQI
7th Aug 2025568 PMAQI
7th Aug 2025569 PMAQI
7th Aug 20255510 PMAQI
7th Aug 20255611 PMAQI
8th Aug 20255012 AMAQI
8th Aug 2025341 AMAQI
8th Aug 2025382 AMAQI
8th Aug 2025383 AMAQI
21°C14/28°C
5 AM
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
41AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
41AQI
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. 41), while the lowest AQI was between 12 AM to 11 PM (Avg. 41).
2025 Days Vs Air Quality
Portsmouth, New Hampshire, United States
2025
90%
197
10%
22
Total number of days with different AQI categories in last 220 days in 2025 (145 days remaining)
Good
197 DaysModerate
22 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 220 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
Portsmouth, New Hampshire, 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
25AQI
25AQI
2nd January 2025
23AQI
23AQI
3rd January 2025
22AQI
22AQI
4th January 2025
24AQI
24AQI
5th January 2025
25AQI
25AQI
6th January 2025
22AQI
22AQI
7th January 2025
23AQI
23AQI
8th January 2025
24AQI
24AQI
9th January 2025
25AQI
25AQI
10th January 2025
26AQI
26AQI
11th January 2025
26AQI
26AQI
12th January 2025
28AQI
28AQI
13th January 2025
39AQI
39AQI
14th January 2025
25AQI
25AQI
15th January 2025
24AQI
24AQI
16th January 2025
27AQI
27AQI
17th January 2025
42AQI
42AQI
18th January 2025
36AQI
36AQI
19th January 2025
24AQI
24AQI
20th January 2025
26AQI
26AQI
21st January 2025
26AQI
26AQI
22nd January 2025
38AQI
38AQI
23rd January 2025
39AQI
39AQI
24th January 2025
43AQI
43AQI
25th January 2025
33AQI
33AQI
26th January 2025
38AQI
38AQI
27th January 2025
27AQI
27AQI
28th January 2025
29AQI
29AQI
29th January 2025
28AQI
28AQI
30th January 2025
31AQI
31AQI
31st January 2025
35AQI
35AQI
1st February 2025
26AQI
26AQI
2nd February 2025
27AQI
27AQI
3rd February 2025
34AQI
34AQI
4th February 2025
27AQI
27AQI
5th February 2025
25AQI
25AQI
6th February 2025
31AQI
31AQI
7th February 2025
32AQI
32AQI
8th February 2025
26AQI
26AQI
9th February 2025
27AQI
27AQI
10th February 2025
28AQI
28AQI
11th February 2025
31AQI
31AQI
12th February 2025
30AQI
30AQI
13th February 2025
27AQI
27AQI
14th February 2025
29AQI
29AQI
15th February 2025
28AQI
28AQI
16th February 2025
27AQI
27AQI
17th February 2025
28AQI
28AQI
18th February 2025
28AQI
28AQI
19th February 2025
23AQI
23AQI
20th February 2025
24AQI
24AQI
21st February 2025
25AQI
25AQI
22nd February 2025
28AQI
28AQI
23rd February 2025
33AQI
33AQI
24th February 2025
38AQI
38AQI
25th February 2025
39AQI
39AQI
26th February 2025
27AQI
27AQI
27th February 2025
33AQI
33AQI
28th February 2025
28AQI
28AQI
1st March 2025
29AQI
29AQI
2nd March 2025
28AQI
28AQI
3rd March 2025
27AQI
27AQI
4th March 2025
31AQI
31AQI
5th March 2025
31AQI
31AQI
6th March 2025
26AQI
26AQI
7th March 2025
29AQI
29AQI
8th March 2025
30AQI
30AQI
9th March 2025
30AQI
30AQI
10th March 2025
28AQI
28AQI
11th March 2025
30AQI
30AQI
12th March 2025
30AQI
30AQI
13th March 2025
20AQI
20AQI
14th March 2025
28AQI
28AQI
15th March 2025
27AQI
27AQI
16th March 2025
28AQI
28AQI
17th March 2025
18AQI
18AQI
18th March 2025
16AQI
16AQI
19th March 2025
20AQI
20AQI
20th March 2025
14AQI
14AQI
21st March 2025
23AQI
23AQI
22nd March 2025
17AQI
17AQI
23rd March 2025
16AQI
16AQI
24th March 2025
20AQI
20AQI
25th March 2025
21AQI
21AQI
26th March 2025
21AQI
21AQI
27th March 2025
16AQI
16AQI
28th March 2025
18AQI
18AQI
29th March 2025
17AQI
17AQI
30th March 2025
22AQI
22AQI
31st March 2025
27AQI
27AQI
1st April 2025
18AQI
18AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
24AQI
24AQI
4th April 2025
31AQI
31AQI
5th April 2025
19AQI
19AQI
6th April 2025
13AQI
13AQI
7th April 2025
15AQI
15AQI
8th April 2025
16AQI
16AQI
9th April 2025
15AQI
15AQI
10th April 2025
18AQI
18AQI
11th April 2025
18AQI
18AQI
12th April 2025
14AQI
14AQI
13th April 2025
17AQI
17AQI
14th April 2025
15AQI
15AQI
15th April 2025
30AQI
30AQI
16th April 2025
12AQI
12AQI
17th April 2025
15AQI
15AQI
18th April 2025
19AQI
19AQI
19th April 2025
41AQI
41AQI
20th April 2025
19AQI
19AQI
21st April 2025
15AQI
15AQI
22nd April 2025
27AQI
27AQI
23rd April 2025
18AQI
18AQI
24th April 2025
18AQI
18AQI
25th April 2025
29AQI
29AQI
26th April 2025
31AQI
31AQI
27th April 2025
10AQI
10AQI
28th April 2025
16AQI
16AQI
29th April 2025
26AQI
26AQI
30th April 2025
21AQI
21AQI
1st May 2025
17AQI
17AQI
2nd May 2025
39AQI
39AQI
3rd May 2025
44AQI
44AQI
4th May 2025
25AQI
25AQI
5th May 2025
18AQI
18AQI
6th May 2025
18AQI
18AQI
7th May 2025
27AQI
27AQI
8th May 2025
25AQI
25AQI
9th May 2025
25AQI
25AQI
10th May 2025
13AQI
13AQI
11th May 2025
16AQI
16AQI
12th May 2025
18AQI
18AQI
13th May 2025
22AQI
22AQI
14th May 2025
27AQI
27AQI
15th May 2025
32AQI
32AQI
16th May 2025
35AQI
35AQI
17th May 2025
31AQI
31AQI
18th May 2025
20AQI
20AQI
19th May 2025
12AQI
12AQI
20th May 2025
12AQI
12AQI
21st May 2025
17AQI
17AQI
22nd May 2025
21AQI
21AQI
23rd May 2025
13AQI
13AQI
24th May 2025
12AQI
12AQI
25th May 2025
12AQI
12AQI
26th May 2025
16AQI
16AQI
27th May 2025
22AQI
22AQI
28th May 2025
27AQI
27AQI
29th May 2025
20AQI
20AQI
30th May 2025
27AQI
27AQI
31st May 2025
21AQI
21AQI
1st June 2025
12AQI
12AQI
2nd June 2025
15AQI
15AQI
3rd June 2025
23AQI
23AQI
4th June 2025
39AQI
39AQI
5th June 2025
59AQI
59AQI
6th June 2025
57AQI
57AQI
7th June 2025
55AQI
55AQI
8th June 2025
86AQI
86AQI
9th June 2025
80AQI
80AQI
10th June 2025
37AQI
37AQI
11th June 2025
48AQI
48AQI
12th June 2025
69AQI
69AQI
13th June 2025
44AQI
44AQI
14th June 2025
36AQI
36AQI
15th June 2025
28AQI
28AQI
16th June 2025
29AQI
29AQI
17th June 2025
26AQI
26AQI
18th June 2025
26AQI
26AQI
19th June 2025
32AQI
32AQI
20th June 2025
35AQI
35AQI
21st June 2025
53AQI
53AQI
22nd June 2025
53AQI
53AQI
23rd June 2025
53AQI
53AQI
24th June 2025
57AQI
57AQI
25th June 2025
48AQI
48AQI
26th June 2025
34AQI
34AQI
27th June 2025
25AQI
25AQI
28th June 2025
23AQI
23AQI
29th June 2025
30AQI
30AQI
30th June 2025
30AQI
30AQI
1st July 2025
40AQI
40AQI
2nd July 2025
30AQI
30AQI
3rd July 2025
44AQI
44AQI
4th July 2025
41AQI
41AQI
5th July 2025
37AQI
37AQI
6th July 2025
50AQI
50AQI
7th July 2025
51AQI
51AQI
8th July 2025
35AQI
35AQI
9th July 2025
33AQI
33AQI
10th July 2025
29AQI
29AQI
11th July 2025
25AQI
25AQI
12th July 2025
29AQI
29AQI
13th July 2025
19AQI
19AQI
14th July 2025
25AQI
25AQI
15th July 2025
28AQI
28AQI
16th July 2025
44AQI
44AQI
17th July 2025
40AQI
40AQI
18th July 2025
19AQI
19AQI
19th July 2025
25AQI
25AQI
20th July 2025
21AQI
21AQI
21st July 2025
27AQI
27AQI
22nd July 2025
17AQI
17AQI
23rd July 2025
21AQI
21AQI
24th July 2025
30AQI
30AQI
25th July 2025
39AQI
39AQI
26th July 2025
89AQI
89AQI
27th July 2025
77AQI
77AQI
28th July 2025
62AQI
62AQI
29th July 2025
55AQI
55AQI
30th July 2025
52AQI
52AQI
31st July 2025
72AQI
72AQI
1st August 2025
56AQI
56AQI
2nd August 2025
26AQI
26AQI
3rd August 2025
52AQI
52AQI
4th August 2025
79AQI
79AQI
5th August 2025
82AQI
82AQI
6th August 2025
46AQI
46AQI
7th August 2025
58AQI
58AQI
29AQI
29AQI
24AQI
20AQI
22AQI
41AQI
39AQI
57AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202530AQI
31
28
31
30
31
20
10
24
7
2
5
197
22
Highest AQI recorded in
August57AQI
Lowest AQI recorded in
April20AQI
202431AQI
31
29
31
30
31
28
1
20
11
24
7
30
31
26
1
3
30
1
341
21
3
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
September26AQI
202333AQI
31
28
31
29
1
31
23
7
21
10
28
3
24
5
1
30
1
28
1
30
1
334
28
2
Highest AQI recorded in
July41AQI
Lowest AQI recorded in
November27AQI
202232AQI
27
4
21
30
1
17
31
29
1
19
3
1
28
1
30
1
30
27
4
290
15
Highest AQI recorded in
July40AQI
Lowest AQI recorded in
August24AQI
202132AQI
29
1
27
1
30
1
30
29
2
28
2
26
4
1
24
7
25
31
27
3
30
1
336
22
1
Highest AQI recorded in
July38AQI
Lowest AQI recorded in
October26AQI
202031AQI
13
20
18
29
1
29
2
29
2
30
31
24
4
28
3
251
12
Highest AQI recorded in
December35AQI
Lowest AQI recorded in
October26AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
33AQILeast Polluted Year Recorded
2025(Avg.)
30AQIPortsmouth's annual 2025 AQI (30) shows an average percentage change of -5.9% (improved AQI) compared to previous years: 2020 (31), 2021 (32), 2022 (32), 2023 (33), 2024 (31).
