Country Background

Londonderry, 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+

October Air Quality Analysis

Londonderry, New Hampshire, United States

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
1st Oct 2023
68AQI
Lowest AQI recorded on
2nd Oct 2025
9AQI


Same Day Analysis (18th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 19 of Good air quality, showing improvement over 2024 and 2022 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 18th Oct - 19th Oct 2025

Londonderry, New Hampshire, United States

AQI
Day
Night
.

6 AM18th Oct 2025

6 PM

5 AM19th Oct 2025

Day time
Avg. Highest Time
12PM18th Oct

37AQI

Avg. Lowest Time
5PM18th Oct

6AQI

Night time
Avg. Highest Time
4AM19th Oct

40AQI

Avg. Lowest Time
6PM18th Oct

8AQI

In the last 24 hours,

Londonderry's AQI reached its highest point of 40 at 4 AM during the Night, while the lowest point, 6, was recorded at 5 PM during the Day between 18th Oct and 19th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Londonderry, New Hampshire, United States

SepOct
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th
Day
Night
19th Sep 2025266 AMAQI
19th Sep 2025277 AMAQI
19th Sep 2025288 AMAQI
19th Sep 2025299 AMAQI
19th Sep 20252810 AMAQI
19th Sep 20252711 AMAQI
19th Sep 20252512 PMAQI
19th Sep 2025221 PMAQI
19th Sep 2025222 PMAQI
19th Sep 2025233 PMAQI
19th Sep 2025224 PMAQI
19th Sep 2025215 PMAQI
19th Sep 2025206 PMAQI
19th Sep 2025247 PMAQI
19th Sep 2025248 PMAQI
19th Sep 2025219 PMAQI
19th Sep 20252110 PMAQI
19th Sep 20252011 PMAQI
20th Sep 20252012 AMAQI
20th Sep 2025171 AMAQI
20th Sep 2025172 AMAQI
20th Sep 2025163 AMAQI
20th Sep 2025164 AMAQI
20th Sep 2025165 AMAQI

20°C15/26°C

20th Sep 2025166 AMAQI
20th Sep 2025167 AMAQI
20th Sep 2025168 AMAQI
20th Sep 2025169 AMAQI
20th Sep 20251710 AMAQI
20th Sep 20251611 AMAQI
20th Sep 20251812 PMAQI
20th Sep 2025171 PMAQI
20th Sep 2025172 PMAQI
20th Sep 2025183 PMAQI
20th Sep 2025164 PMAQI
20th Sep 2025175 PMAQI
20th Sep 2025166 PMAQI
20th Sep 2025167 PMAQI
20th Sep 2025178 PMAQI
20th Sep 2025189 PMAQI
20th Sep 20251810 PMAQI
20th Sep 20251911 PMAQI
21st Sep 20251812 AMAQI
21st Sep 2025201 AMAQI
21st Sep 2025212 AMAQI
21st Sep 2025243 AMAQI
21st Sep 2025244 AMAQI
21st Sep 2025255 AMAQI

14°C8/21°C

21st Sep 2025256 AMAQI
21st Sep 2025247 AMAQI
21st Sep 2025258 AMAQI
21st Sep 2025239 AMAQI
21st Sep 20252210 AMAQI
21st Sep 20252211 AMAQI
21st Sep 20252012 PMAQI
21st Sep 2025181 PMAQI
21st Sep 2025182 PMAQI
21st Sep 2025203 PMAQI
21st Sep 2025204 PMAQI
21st Sep 2025185 PMAQI
21st Sep 2025186 PMAQI
21st Sep 2025207 PMAQI
21st Sep 2025208 PMAQI
21st Sep 2025199 PMAQI
21st Sep 20251810 PMAQI
21st Sep 20251911 PMAQI
22nd Sep 20252012 AMAQI
22nd Sep 2025161 AMAQI
22nd Sep 2025162 AMAQI
22nd Sep 2025163 AMAQI
22nd Sep 2025144 AMAQI
22nd Sep 2025155 AMAQI

13°C4/22°C

22nd Sep 2025166 AMAQI
22nd Sep 2025177 AMAQI
22nd Sep 2025168 AMAQI
22nd Sep 2025179 AMAQI
22nd Sep 20251710 AMAQI
22nd Sep 20251811 AMAQI
22nd Sep 20251812 PMAQI
22nd Sep 2025181 PMAQI
22nd Sep 2025192 PMAQI
22nd Sep 2025183 PMAQI
22nd Sep 2025204 PMAQI
22nd Sep 2025205 PMAQI
22nd Sep 2025206 PMAQI
22nd Sep 2025187 PMAQI
22nd Sep 2025208 PMAQI
22nd Sep 2025209 PMAQI
22nd Sep 20252110 PMAQI
22nd Sep 20252011 PMAQI
23rd Sep 20252012 AMAQI
23rd Sep 2025201 AMAQI
23rd Sep 2025212 AMAQI
23rd Sep 2025203 AMAQI
23rd Sep 2025224 AMAQI
23rd Sep 2025225 AMAQI

15°C4/26°C

23rd Sep 2025216 AMAQI
23rd Sep 2025227 AMAQI
23rd Sep 2025238 AMAQI
23rd Sep 2025249 AMAQI
23rd Sep 20252610 AMAQI
23rd Sep 20252811 AMAQI
23rd Sep 20253012 PMAQI
23rd Sep 2025301 PMAQI
23rd Sep 2025312 PMAQI
23rd Sep 2025323 PMAQI
23rd Sep 2025324 PMAQI
23rd Sep 2025325 PMAQI
23rd Sep 2025326 PMAQI
23rd Sep 2025287 PMAQI
23rd Sep 2025278 PMAQI
23rd Sep 2025329 PMAQI
23rd Sep 20253410 PMAQI
23rd Sep 20253211 PMAQI
24th Sep 20253212 AMAQI
24th Sep 2025331 AMAQI
24th Sep 2025342 AMAQI
24th Sep 2025343 AMAQI
24th Sep 2025344 AMAQI
24th Sep 2025345 AMAQI

19°C13/30°C

24th Sep 2025346 AMAQI
24th Sep 2025337 AMAQI
24th Sep 2025348 AMAQI
24th Sep 2025329 AMAQI
24th Sep 20253210 AMAQI
24th Sep 20253011 AMAQI
24th Sep 20253112 PMAQI
24th Sep 2025291 PMAQI
24th Sep 2025282 PMAQI
24th Sep 2025303 PMAQI
24th Sep 2025304 PMAQI
24th Sep 2025305 PMAQI
24th Sep 2025296 PMAQI
24th Sep 2025317 PMAQI
24th Sep 2025318 PMAQI
24th Sep 2025269 PMAQI
24th Sep 20252510 PMAQI
24th Sep 20252711 PMAQI
25th Sep 20252712 AMAQI
25th Sep 2025171 AMAQI
25th Sep 2025152 AMAQI
25th Sep 2025143 AMAQI
25th Sep 2025154 AMAQI
25th Sep 2025145 AMAQI

17°C15/18°C

25th Sep 2025156 AMAQI
25th Sep 2025147 AMAQI
25th Sep 2025198 AMAQI
25th Sep 2025209 AMAQI
25th Sep 20252010 AMAQI
25th Sep 20252111 AMAQI
25th Sep 20252112 PMAQI
25th Sep 2025191 PMAQI
25th Sep 2025182 PMAQI
25th Sep 2025163 PMAQI
25th Sep 2025154 PMAQI
25th Sep 2025165 PMAQI
25th Sep 2025166 PMAQI
25th Sep 2025177 PMAQI
25th Sep 2025178 PMAQI
25th Sep 2025209 PMAQI
25th Sep 20252210 PMAQI
25th Sep 20252211 PMAQI
26th Sep 20252412 AMAQI
26th Sep 2025251 AMAQI
26th Sep 2025202 AMAQI
26th Sep 2025173 AMAQI
26th Sep 2025154 AMAQI
26th Sep 2025135 AMAQI

18°C16/21°C

26th Sep 2025176 AMAQI
26th Sep 2025167 AMAQI
26th Sep 2025168 AMAQI
26th Sep 2025169 AMAQI
26th Sep 20251810 AMAQI
26th Sep 20252111 AMAQI
26th Sep 20252512 PMAQI
26th Sep 2025281 PMAQI
26th Sep 2025292 PMAQI
26th Sep 2025293 PMAQI
26th Sep 2025294 PMAQI
26th Sep 2025285 PMAQI
26th Sep 2025226 PMAQI
26th Sep 2025177 PMAQI
26th Sep 2025188 PMAQI
26th Sep 2025189 PMAQI
26th Sep 20251410 PMAQI
26th Sep 20251411 PMAQI
27th Sep 20251412 AMAQI
27th Sep 2025151 AMAQI
27th Sep 2025152 AMAQI
27th Sep 2025163 AMAQI
27th Sep 2025164 AMAQI
27th Sep 2025165 AMAQI

21°C17/25°C

27th Sep 2025156 AMAQI
27th Sep 2025157 AMAQI
27th Sep 2025168 AMAQI
27th Sep 2025179 AMAQI
27th Sep 20251510 AMAQI
27th Sep 20251511 AMAQI
27th Sep 20251612 PMAQI
27th Sep 2025171 PMAQI
27th Sep 2025182 PMAQI
27th Sep 2025173 PMAQI
27th Sep 2025174 PMAQI
27th Sep 2025185 PMAQI
27th Sep 2025186 PMAQI
27th Sep 2025217 PMAQI
27th Sep 2025258 PMAQI
27th Sep 2025209 PMAQI
27th Sep 20252710 PMAQI
27th Sep 20253011 PMAQI
28th Sep 20252812 AMAQI
28th Sep 2025251 AMAQI
28th Sep 2025262 AMAQI
28th Sep 2025263 AMAQI
28th Sep 2025284 AMAQI
28th Sep 2025285 AMAQI

19°C13/26°C

28th Sep 2025276 AMAQI
28th Sep 2025257 AMAQI
28th Sep 2025228 AMAQI
28th Sep 2025179 AMAQI
28th Sep 20252610 AMAQI
28th Sep 20252811 AMAQI
28th Sep 20252812 PMAQI
28th Sep 2025281 PMAQI
28th Sep 2025272 PMAQI
28th Sep 2025283 PMAQI
28th Sep 2025274 PMAQI
28th Sep 2025265 PMAQI
28th Sep 2025266 PMAQI
28th Sep 2025357 PMAQI
28th Sep 2025348 PMAQI
28th Sep 2025409 PMAQI
28th Sep 20253910 PMAQI
28th Sep 20253711 PMAQI
29th Sep 20253312 AMAQI
29th Sep 2025341 AMAQI
29th Sep 2025342 AMAQI
29th Sep 2025323 AMAQI
29th Sep 2025314 AMAQI
29th Sep 2025305 AMAQI

22°C16/32°C

29th Sep 2025296 AMAQI
29th Sep 2025297 AMAQI
29th Sep 2025348 AMAQI
29th Sep 2025389 AMAQI
29th Sep 20253210 AMAQI
29th Sep 20253411 AMAQI
29th Sep 20252812 PMAQI
29th Sep 2025351 PMAQI
29th Sep 2025252 PMAQI
29th Sep 2025203 PMAQI
29th Sep 2025224 PMAQI
29th Sep 2025205 PMAQI
29th Sep 2025226 PMAQI
29th Sep 2025217 PMAQI
29th Sep 2025248 PMAQI
29th Sep 2025259 PMAQI
29th Sep 20252710 PMAQI
29th Sep 20252611 PMAQI
30th Sep 20252612 AMAQI
30th Sep 2025271 AMAQI
30th Sep 2025282 AMAQI
30th Sep 2025313 AMAQI
30th Sep 2025304 AMAQI
30th Sep 2025295 AMAQI

19°C12/29°C

30th Sep 2025316 AMAQI
30th Sep 2025307 AMAQI
30th Sep 2025338 AMAQI
30th Sep 2025319 AMAQI
30th Sep 20253510 AMAQI
30th Sep 20253211 AMAQI
30th Sep 20253312 PMAQI
30th Sep 2025371 PMAQI
30th Sep 2025302 PMAQI
30th Sep 2025263 PMAQI
30th Sep 2025254 PMAQI
30th Sep 2025275 PMAQI
30th Sep 2025246 PMAQI
30th Sep 2025237 PMAQI
30th Sep 2025208 PMAQI
30th Sep 2025249 PMAQI
30th Sep 20252310 PMAQI
30th Sep 20252611 PMAQI
1st Oct 20252712 AMAQI
1st Oct 2025241 AMAQI
1st Oct 2025222 AMAQI
1st Oct 2025223 AMAQI
1st Oct 2025194 AMAQI
1st Oct 2025185 AMAQI

17°C12/27°C

1st Oct 2025186 AMAQI
1st Oct 2025177 AMAQI
1st Oct 2025178 AMAQI
1st Oct 2025189 AMAQI
1st Oct 20251710 AMAQI
1st Oct 20251711 AMAQI
1st Oct 2025812 PMAQI
1st Oct 202561 PMAQI
1st Oct 2025142 PMAQI
1st Oct 2025223 PMAQI
1st Oct 2025204 PMAQI
1st Oct 2025135 PMAQI
1st Oct 202566 PMAQI
1st Oct 2025127 PMAQI
1st Oct 2025138 PMAQI
1st Oct 202559 PMAQI
1st Oct 20251210 PMAQI
1st Oct 20252011 PMAQI
2nd Oct 20252012 AMAQI
2nd Oct 2025191 AMAQI
2nd Oct 2025132 AMAQI
2nd Oct 202563 AMAQI
2nd Oct 202564 AMAQI
2nd Oct 202555 AMAQI

13°C7/22°C

2nd Oct 202566 AMAQI
2nd Oct 202567 AMAQI
2nd Oct 202578 AMAQI
2nd Oct 202569 AMAQI
2nd Oct 2025610 AMAQI
2nd Oct 2025611 AMAQI
2nd Oct 20251012 PMAQI
2nd Oct 2025111 PMAQI
2nd Oct 2025112 PMAQI
2nd Oct 2025143 PMAQI
2nd Oct 2025124 PMAQI
2nd Oct 202565 PMAQI
2nd Oct 202566 PMAQI
2nd Oct 202567 PMAQI
2nd Oct 202578 PMAQI
2nd Oct 202579 PMAQI
2nd Oct 2025710 PMAQI
2nd Oct 2025711 PMAQI
3rd Oct 20251212 AMAQI
3rd Oct 2025281 AMAQI
3rd Oct 2025302 AMAQI
3rd Oct 2025253 AMAQI
3rd Oct 2025214 AMAQI
3rd Oct 2025125 AMAQI

11°C4/21°C

3rd Oct 2025126 AMAQI
3rd Oct 2025167 AMAQI
3rd Oct 2025118 AMAQI
3rd Oct 202579 AMAQI
3rd Oct 2025910 AMAQI
3rd Oct 20251411 AMAQI
3rd Oct 20252512 PMAQI
3rd Oct 2025351 PMAQI
3rd Oct 2025342 PMAQI
3rd Oct 2025313 PMAQI
3rd Oct 2025224 PMAQI
3rd Oct 2025175 PMAQI
3rd Oct 2025256 PMAQI
3rd Oct 2025227 PMAQI
3rd Oct 2025208 PMAQI
3rd Oct 2025179 PMAQI
3rd Oct 20252310 PMAQI
3rd Oct 20252711 PMAQI
4th Oct 20253212 AMAQI
4th Oct 2025321 AMAQI
4th Oct 2025252 AMAQI
4th Oct 2025213 AMAQI
4th Oct 2025134 AMAQI
4th Oct 2025165 AMAQI

13°C4/25°C

4th Oct 2025126 AMAQI
4th Oct 2025147 AMAQI
4th Oct 2025188 AMAQI
4th Oct 2025139 AMAQI
4th Oct 20251410 AMAQI
4th Oct 20251711 AMAQI
4th Oct 20252112 PMAQI
4th Oct 2025351 PMAQI
4th Oct 2025332 PMAQI
4th Oct 2025343 PMAQI
4th Oct 2025394 PMAQI
4th Oct 2025285 PMAQI
4th Oct 2025186 PMAQI
4th Oct 2025307 PMAQI
4th Oct 2025378 PMAQI
4th Oct 2025389 PMAQI
4th Oct 20252410 PMAQI
4th Oct 20251611 PMAQI
5th Oct 20253412 AMAQI
5th Oct 2025401 AMAQI
5th Oct 2025392 AMAQI
5th Oct 2025403 AMAQI
5th Oct 2025374 AMAQI
5th Oct 2025385 AMAQI

18°C8/31°C

5th Oct 2025436 AMAQI
5th Oct 2025467 AMAQI
5th Oct 2025458 AMAQI
5th Oct 2025479 AMAQI
5th Oct 20254410 AMAQI
5th Oct 20254611 AMAQI
5th Oct 20255112 PMAQI
5th Oct 2025521 PMAQI
5th Oct 2025462 PMAQI
5th Oct 2025443 PMAQI
5th Oct 2025484 PMAQI
5th Oct 2025435 PMAQI
5th Oct 2025506 PMAQI
5th Oct 2025527 PMAQI
5th Oct 2025518 PMAQI
5th Oct 2025489 PMAQI
5th Oct 20255010 PMAQI
5th Oct 20255011 PMAQI
6th Oct 20255312 AMAQI
6th Oct 2025541 AMAQI
6th Oct 2025552 AMAQI
6th Oct 2025533 AMAQI
6th Oct 2025544 AMAQI
6th Oct 2025545 AMAQI

19°C10/31°C

6th Oct 2025526 AMAQI
6th Oct 2025537 AMAQI
6th Oct 2025548 AMAQI
6th Oct 2025549 AMAQI
6th Oct 20255510 AMAQI
6th Oct 20255611 AMAQI
6th Oct 20255812 PMAQI
6th Oct 2025591 PMAQI

20°C12/31°C

7th Oct 2025497 AMAQI
7th Oct 2025458 AMAQI
7th Oct 2025519 AMAQI
7th Oct 20255110 AMAQI
7th Oct 20255111 AMAQI
7th Oct 20255012 PMAQI
7th Oct 2025501 PMAQI
7th Oct 2025512 PMAQI
7th Oct 2025543 PMAQI
7th Oct 2025534 PMAQI
7th Oct 2025475 PMAQI
7th Oct 2025466 PMAQI
7th Oct 2025417 PMAQI
7th Oct 2025408 PMAQI
7th Oct 2025399 PMAQI
7th Oct 20252110 PMAQI
7th Oct 20251411 PMAQI
8th Oct 20251112 AMAQI
8th Oct 2025101 AMAQI
8th Oct 202592 AMAQI
8th Oct 202593 AMAQI
8th Oct 202574 AMAQI
8th Oct 202595 AMAQI

21°C14/30°C

8th Oct 202576 AMAQI
8th Oct 202577 AMAQI
8th Oct 202588 AMAQI
8th Oct 202589 AMAQI
8th Oct 2025810 AMAQI
8th Oct 2025711 AMAQI
8th Oct 20251712 PMAQI
8th Oct 2025251 PMAQI
8th Oct 2025252 PMAQI
8th Oct 2025173 PMAQI
8th Oct 2025124 PMAQI
8th Oct 202595 PMAQI
8th Oct 2025146 PMAQI
8th Oct 2025117 PMAQI
8th Oct 202578 PMAQI
8th Oct 202569 PMAQI
8th Oct 2025610 PMAQI
8th Oct 2025611 PMAQI
9th Oct 2025812 AMAQI
9th Oct 202561 AMAQI
9th Oct 202562 AMAQI
9th Oct 202563 AMAQI
9th Oct 2025144 AMAQI
9th Oct 2025215 AMAQI

17°C10/19°C

9th Oct 2025226 AMAQI
9th Oct 2025217 AMAQI
9th Oct 2025218 AMAQI
9th Oct 2025219 AMAQI
9th Oct 20252410 AMAQI
9th Oct 20252211 AMAQI
9th Oct 20252112 PMAQI
9th Oct 2025251 PMAQI
9th Oct 2025192 PMAQI
9th Oct 2025193 PMAQI
9th Oct 2025234 PMAQI
9th Oct 2025295 PMAQI
9th Oct 2025276 PMAQI
9th Oct 2025237 PMAQI
9th Oct 2025238 PMAQI
9th Oct 2025239 PMAQI
9th Oct 20252310 PMAQI
9th Oct 20252511 PMAQI
10th Oct 20252412 AMAQI
10th Oct 2025231 AMAQI
10th Oct 2025242 AMAQI
10th Oct 2025213 AMAQI
10th Oct 2025224 AMAQI
10th Oct 2025165 AMAQI

9°C5/16°C

10th Oct 202586 AMAQI
10th Oct 202587 AMAQI
10th Oct 202578 AMAQI
10th Oct 202579 AMAQI
10th Oct 2025610 AMAQI
10th Oct 2025611 AMAQI
10th Oct 2025612 PMAQI
10th Oct 2025231 PMAQI
10th Oct 2025222 PMAQI
10th Oct 2025183 PMAQI
10th Oct 202564 PMAQI
10th Oct 2025155 PMAQI
10th Oct 2025206 PMAQI
10th Oct 2025107 PMAQI
10th Oct 2025148 PMAQI
10th Oct 2025239 PMAQI
10th Oct 20251810 PMAQI
10th Oct 20251311 PMAQI
11th Oct 20252612 AMAQI
11th Oct 2025221 AMAQI
11th Oct 2025182 AMAQI
11th Oct 2025203 AMAQI
11th Oct 2025234 AMAQI
11th Oct 2025195 AMAQI

8°C0/19°C

11th Oct 2025166 AMAQI
11th Oct 2025177 AMAQI
11th Oct 2025188 AMAQI
11th Oct 202599 AMAQI
11th Oct 20251110 AMAQI
11th Oct 2025911 AMAQI
11th Oct 20252312 PMAQI
11th Oct 2025321 PMAQI
11th Oct 2025162 PMAQI
11th Oct 2025123 PMAQI
11th Oct 202594 PMAQI
11th Oct 202575 PMAQI
11th Oct 202586 PMAQI
11th Oct 2025107 PMAQI
11th Oct 2025108 PMAQI
11th Oct 2025109 PMAQI
11th Oct 2025910 PMAQI
11th Oct 20251811 PMAQI
12th Oct 20252612 AMAQI
12th Oct 2025251 AMAQI
12th Oct 2025252 AMAQI
12th Oct 2025193 AMAQI
12th Oct 2025124 AMAQI
12th Oct 202585 AMAQI

10°C3/19°C

12th Oct 202576 AMAQI
12th Oct 2025157 AMAQI
12th Oct 2025278 AMAQI
12th Oct 2025269 AMAQI
12th Oct 20252510 AMAQI
12th Oct 20251711 AMAQI
12th Oct 2025912 PMAQI
12th Oct 2025171 PMAQI
12th Oct 2025222 PMAQI
12th Oct 2025143 PMAQI
12th Oct 2025274 PMAQI
12th Oct 202595 PMAQI
12th Oct 2025126 PMAQI
12th Oct 2025227 PMAQI
12th Oct 2025318 PMAQI
12th Oct 2025389 PMAQI
12th Oct 20253910 PMAQI
12th Oct 20253911 PMAQI
13th Oct 20252212 AMAQI
13th Oct 2025161 AMAQI
13th Oct 2025112 AMAQI
13th Oct 202583 AMAQI
13th Oct 202584 AMAQI
13th Oct 202575 AMAQI

11°C6/15°C

13th Oct 202576 AMAQI
13th Oct 202577 AMAQI
13th Oct 202588 AMAQI
13th Oct 202589 AMAQI
13th Oct 2025810 AMAQI
13th Oct 2025911 AMAQI
13th Oct 20251112 PMAQI
13th Oct 2025101 PMAQI
13th Oct 2025172 PMAQI
13th Oct 2025173 PMAQI
13th Oct 2025114 PMAQI
13th Oct 2025215 PMAQI
13th Oct 2025306 PMAQI
13th Oct 2025287 PMAQI
13th Oct 2025108 PMAQI
13th Oct 2025119 PMAQI
13th Oct 2025910 PMAQI
13th Oct 2025811 PMAQI
14th Oct 2025712 AMAQI
14th Oct 202591 AMAQI
14th Oct 202572 AMAQI
14th Oct 202593 AMAQI
14th Oct 2025134 AMAQI
14th Oct 2025225 AMAQI

10°C10/11°C

14th Oct 202586 AMAQI
14th Oct 202577 AMAQI
14th Oct 202568 AMAQI
14th Oct 2025179 AMAQI
14th Oct 20251610 AMAQI
14th Oct 20251511 AMAQI
14th Oct 20252712 PMAQI
14th Oct 2025231 PMAQI
14th Oct 2025232 PMAQI
14th Oct 2025203 PMAQI
14th Oct 2025174 PMAQI
14th Oct 202565 PMAQI
14th Oct 202586 PMAQI
14th Oct 2025207 PMAQI
14th Oct 2025138 PMAQI
14th Oct 2025209 PMAQI
14th Oct 2025710 PMAQI
14th Oct 20252011 PMAQI
15th Oct 20252012 AMAQI
15th Oct 202591 AMAQI
15th Oct 2025102 AMAQI
15th Oct 2025113 AMAQI
15th Oct 202584 AMAQI
15th Oct 202565 AMAQI

12°C10/19°C

15th Oct 2025156 AMAQI
15th Oct 2025157 AMAQI
15th Oct 202568 AMAQI
15th Oct 202569 AMAQI
15th Oct 2025610 AMAQI
15th Oct 2025611 AMAQI
15th Oct 20251012 PMAQI
15th Oct 202591 PMAQI
15th Oct 2025212 PMAQI
15th Oct 2025263 PMAQI
15th Oct 202564 PMAQI
15th Oct 202575 PMAQI
15th Oct 2025156 PMAQI
15th Oct 2025247 PMAQI
15th Oct 2025268 PMAQI
15th Oct 2025269 PMAQI
15th Oct 20252510 PMAQI
15th Oct 20252611 PMAQI
16th Oct 20251612 AMAQI
16th Oct 2025201 AMAQI
16th Oct 2025242 AMAQI
16th Oct 2025293 AMAQI
16th Oct 2025284 AMAQI
16th Oct 2025275 AMAQI

12°C6/19°C

16th Oct 2025276 AMAQI
16th Oct 2025287 AMAQI
16th Oct 2025268 AMAQI
16th Oct 2025239 AMAQI
16th Oct 20252510 AMAQI
16th Oct 20252011 AMAQI
16th Oct 20251412 PMAQI
16th Oct 2025161 PMAQI
16th Oct 202562 PMAQI
16th Oct 2025143 PMAQI
16th Oct 202564 PMAQI
16th Oct 202595 PMAQI
16th Oct 2025166 PMAQI
16th Oct 2025207 PMAQI
16th Oct 2025108 PMAQI
16th Oct 2025169 PMAQI
16th Oct 20251510 PMAQI
16th Oct 20251611 PMAQI
17th Oct 20251112 AMAQI
17th Oct 2025271 AMAQI
17th Oct 2025272 AMAQI
17th Oct 202593 AMAQI
17th Oct 2025194 AMAQI
17th Oct 2025145 AMAQI

9°C5/14°C

17th Oct 202576 AMAQI
17th Oct 2025167 AMAQI
17th Oct 2025268 AMAQI
17th Oct 2025169 AMAQI
17th Oct 20251210 AMAQI
17th Oct 2025911 AMAQI
17th Oct 20251112 PMAQI
17th Oct 2025271 PMAQI
17th Oct 2025202 PMAQI
17th Oct 2025163 PMAQI
17th Oct 2025114 PMAQI
17th Oct 202595 PMAQI
17th Oct 2025116 PMAQI
17th Oct 2025127 PMAQI
17th Oct 2025108 PMAQI
17th Oct 202599 PMAQI
17th Oct 20251310 PMAQI
17th Oct 20251311 PMAQI
18th Oct 20252012 AMAQI
18th Oct 2025121 AMAQI
18th Oct 2025142 AMAQI
18th Oct 2025233 AMAQI
18th Oct 2025144 AMAQI
18th Oct 2025145 AMAQI

11°C5/20°C

18th Oct 2025166 AMAQI
18th Oct 2025207 AMAQI
18th Oct 2025278 AMAQI
18th Oct 2025299 AMAQI
18th Oct 20252010 AMAQI
18th Oct 20252411 AMAQI
18th Oct 20253712 PMAQI
18th Oct 2025281 PMAQI
18th Oct 2025302 PMAQI
18th Oct 2025253 PMAQI
18th Oct 2025114 PMAQI
18th Oct 202565 PMAQI
18th Oct 202586 PMAQI
18th Oct 2025227 PMAQI
18th Oct 2025228 PMAQI
18th Oct 2025259 PMAQI
18th Oct 20251410 PMAQI
18th Oct 20251511 PMAQI
19th Oct 20251212 AMAQI
19th Oct 2025111 AMAQI
19th Oct 2025112 AMAQI
19th Oct 2025313 AMAQI
19th Oct 2025404 AMAQI
19th Oct 2025375 AMAQI

10°C2/21°C

19th Oct 2025406 AMAQI
6 AM
19th Oct 2025397 AMAQI
19th Oct 2025408 AMAQI
19th Oct 2025419 AMAQI
19th Oct 20254110 AMAQI
19th Oct 20254411 AMAQI
19th Oct 20253312 PMAQI
12 PM
19th Oct 2025281 PMAQI
19th Oct 2025272 PMAQI
19th Oct 2025233 PMAQI
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
1 PM

26AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 PM

19AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 1 PM (Avg. 26), while the lowest AQI was between 5 PM to 5 PM (Avg. 19).
Night time
Avg. Highest Time
12 AM - 1 AM

22AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
5 AM

20AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 22), while the lowest AQI was between 5 AM to 5 AM (Avg. 20).

2025 Days Vs Air Quality

Londonderry, New Hampshire, United States

2025

92%

268

8%

23

Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)

Good
268 Days
Moderate
23 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 92%

Health Risk Level:

Very Low

In 2025, 92% of 292 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

Londonderry, 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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
26AQI
2nd January 2025
24AQI
3rd January 2025
23AQI
4th January 2025
28AQI
5th January 2025
26AQI
6th January 2025
24AQI
7th January 2025
24AQI
8th January 2025
26AQI
9th January 2025
27AQI
10th January 2025
31AQI
11th January 2025
27AQI
12th January 2025
29AQI
13th January 2025
40AQI
14th January 2025
27AQI
15th January 2025
28AQI
16th January 2025
29AQI
17th January 2025
47AQI
18th January 2025
40AQI
19th January 2025
28AQI
20th January 2025
26AQI
21st January 2025
29AQI
22nd January 2025
44AQI
23rd January 2025
43AQI
24th January 2025
43AQI
25th January 2025
40AQI
26th January 2025
42AQI
27th January 2025
31AQI
28th January 2025
30AQI
29th January 2025
29AQI
30th January 2025
31AQI
31st January 2025
34AQI
1st February 2025
28AQI
2nd February 2025
28AQI
3rd February 2025
34AQI
4th February 2025
29AQI
5th February 2025
27AQI
6th February 2025
36AQI
7th February 2025
30AQI
8th February 2025
28AQI
9th February 2025
29AQI
10th February 2025
28AQI
11th February 2025
31AQI
12th February 2025
31AQI
13th February 2025
26AQI
14th February 2025
30AQI
15th February 2025
30AQI
16th February 2025
28AQI
17th February 2025
30AQI
18th February 2025
29AQI
19th February 2025
25AQI
20th February 2025
23AQI
21st February 2025
26AQI
22nd February 2025
31AQI
23rd February 2025
35AQI
24th February 2025
40AQI
25th February 2025
37AQI
26th February 2025
28AQI
27th February 2025
30AQI
28th February 2025
29AQI
1st March 2025
29AQI
2nd March 2025
30AQI
3rd March 2025
29AQI
4th March 2025
32AQI
5th March 2025
31AQI
6th March 2025
27AQI
7th March 2025
31AQI
8th March 2025
32AQI
9th March 2025
31AQI
10th March 2025
30AQI
11th March 2025
41AQI
12th March 2025
38AQI
13th March 2025
21AQI
14th March 2025
25AQI
15th March 2025
27AQI
16th March 2025
25AQI
17th March 2025
16AQI
18th March 2025
16AQI
19th March 2025
20AQI
20th March 2025
17AQI
21st March 2025
24AQI
22nd March 2025
17AQI
23rd March 2025
16AQI
24th March 2025
21AQI
25th March 2025
20AQI
26th March 2025
20AQI
27th March 2025
19AQI
28th March 2025
18AQI
29th March 2025
17AQI
30th March 2025
21AQI
31st March 2025
26AQI
1st April 2025
18AQI
2nd April 2025
17AQI
3rd April 2025
20AQI
4th April 2025
20AQI
5th April 2025
17AQI
6th April 2025
16AQI
7th April 2025
15AQI
8th April 2025
16AQI
9th April 2025
14AQI
10th April 2025
18AQI
11th April 2025
18AQI
12th April 2025
14AQI
13th April 2025
15AQI
14th April 2025
16AQI
15th April 2025
19AQI
16th April 2025
11AQI
17th April 2025
14AQI
18th April 2025
21AQI
19th April 2025
44AQI
20th April 2025
15AQI
21st April 2025
15AQI
22nd April 2025
23AQI
23rd April 2025
16AQI
24th April 2025
18AQI
25th April 2025
33AQI
26th April 2025
28AQI
27th April 2025
10AQI
28th April 2025
16AQI
29th April 2025
24AQI
30th April 2025
19AQI
1st May 2025
17AQI
2nd May 2025
32AQI
3rd May 2025
39AQI
4th May 2025
25AQI
5th May 2025
16AQI
6th May 2025
18AQI
7th May 2025
22AQI
8th May 2025
19AQI
9th May 2025
18AQI
10th May 2025
12AQI
11th May 2025
16AQI
12th May 2025
19AQI
13th May 2025
23AQI
14th May 2025
29AQI
15th May 2025
29AQI
16th May 2025
35AQI
17th May 2025
39AQI
18th May 2025
16AQI
19th May 2025
12AQI
20th May 2025
12AQI
21st May 2025
16AQI
22nd May 2025
16AQI
23rd May 2025
11AQI
24th May 2025
13AQI
25th May 2025
13AQI
26th May 2025
18AQI
27th May 2025
20AQI
28th May 2025
23AQI
29th May 2025
18AQI
30th May 2025
25AQI
31st May 2025
20AQI
1st June 2025
15AQI
2nd June 2025
17AQI
3rd June 2025
20AQI
4th June 2025
39AQI
5th June 2025
57AQI
6th June 2025
56AQI
7th June 2025
54AQI
8th June 2025
83AQI
9th June 2025
78AQI
10th June 2025
29AQI
11th June 2025
47AQI
12th June 2025
69AQI
13th June 2025
43AQI
14th June 2025
36AQI
15th June 2025
31AQI
16th June 2025
29AQI
17th June 2025
26AQI
18th June 2025
19AQI
19th June 2025
26AQI
20th June 2025
29AQI
21st June 2025
44AQI
22nd June 2025
44AQI
23rd June 2025
47AQI
24th June 2025
53AQI
25th June 2025
46AQI
26th June 2025
38AQI
27th June 2025
26AQI
28th June 2025
25AQI
29th June 2025
36AQI
30th June 2025
27AQI
1st July 2025
39AQI
2nd July 2025
30AQI
3rd July 2025
42AQI
4th July 2025
41AQI
5th July 2025
41AQI
6th July 2025
50AQI
7th July 2025
49AQI
8th July 2025
31AQI
9th July 2025
33AQI
10th July 2025
28AQI
11th July 2025
30AQI
12th July 2025
35AQI
13th July 2025
25AQI
14th July 2025
23AQI
15th July 2025
35AQI
16th July 2025
54AQI
17th July 2025
37AQI
18th July 2025
17AQI
19th July 2025
23AQI
20th July 2025
22AQI
21st July 2025
26AQI
22nd July 2025
17AQI
23rd July 2025
20AQI
24th July 2025
32AQI
25th July 2025
42AQI
26th July 2025
72AQI
27th July 2025
85AQI
28th July 2025
65AQI
29th July 2025
56AQI
30th July 2025
46AQI
31st July 2025
67AQI
1st August 2025
52AQI
2nd August 2025
27AQI
3rd August 2025
61AQI
4th August 2025
86AQI
5th August 2025
91AQI
6th August 2025
47AQI
7th August 2025
51AQI
8th August 2025
37AQI
9th August 2025
35AQI
10th August 2025
42AQI
11th August 2025
56AQI
12th August 2025
59AQI
13th August 2025
51AQI
14th August 2025
37AQI
15th August 2025
48AQI
16th August 2025
44AQI
17th August 2025
54AQI
18th August 2025
16AQI
19th August 2025
17AQI
20th August 2025
16AQI
21st August 2025
18AQI
22nd August 2025
22AQI
23rd August 2025
30AQI
24th August 2025
25AQI
25th August 2025
25AQI
26th August 2025
16AQI
27th August 2025
16AQI
28th August 2025
19AQI
29th August 2025
21AQI
30th August 2025
17AQI
31st August 2025
19AQI
1st September 2025
26AQI
2nd September 2025
28AQI
3rd September 2025
27AQI
4th September 2025
25AQI
5th September 2025
27AQI
6th September 2025
45AQI
7th September 2025
35AQI
8th September 2025
21AQI
9th September 2025
20AQI
10th September 2025
21AQI
11th September 2025
24AQI
12th September 2025
29AQI
13th September 2025
32AQI
14th September 2025
37AQI
15th September 2025
38AQI
16th September 2025
31AQI
17th September 2025
24AQI
18th September 2025
23AQI
19th September 2025
24AQI
20th September 2025
17AQI
21st September 2025
21AQI
22nd September 2025
18AQI
23rd September 2025
26AQI
24th September 2025
31AQI
25th September 2025
18AQI
26th September 2025
20AQI
27th September 2025
18AQI
28th September 2025
29AQI
29th September 2025
29AQI
30th September 2025
28AQI
1st October 2025
16AQI
2nd October 2025
9AQI
3rd October 2025
21AQI
4th October 2025
24AQI
5th October 2025
44AQI
6th October 2025
54AQI
7th October 2025
43AQI
8th October 2025
10AQI
9th October 2025
20AQI
10th October 2025
16AQI
11th October 2025
15AQI
12th October 2025
22AQI
13th October 2025
13AQI
14th October 2025
14AQI
15th October 2025
15AQI
16th October 2025
19AQI
17th October 2025
14AQI
18th October 2025
19AQI
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

31AQI

30AQI

25AQI

19AQI

21AQI

40AQI

39AQI

37AQI

26AQI

22AQI


No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202529AQI

31
28
31
30
31
23
7
25
6
22
9
30
17
1
268
23

Highest AQI recorded in

June

40AQI


Lowest AQI recorded in

April

19AQI


202431AQI

31
29
31
30
31
29
27
4
25
6
30
31
26
1
3
30
1
350
12
3

Highest AQI recorded in

November

38AQI


Lowest AQI recorded in

September

25AQI


202332AQI

31
27
1
31
29
1
31
26
4
21
10
29
2
25
5
30
1
28
1
31
339
25

Highest AQI recorded in

July

42AQI


Lowest AQI recorded in

October

24AQI


202231AQI

27
4
21
30
1
24
31
30
20
2
1
29
31
30
28
3
302
10

Highest AQI recorded in

July

37AQI


Lowest AQI recorded in

September

23AQI


202132AQI

28
2
28
30
1
30
31
28
2
24
5
2
26
5
30
31
30
29
2
345
17
2

Highest AQI recorded in

July

41AQI


Lowest AQI recorded in

October

26AQI


202029AQI

12
21
18
30
31
31
30
31
26
2
28
3
258
5

Highest AQI recorded in

April

34AQI


Lowest AQI recorded in

October

21AQI


Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
32AQI
Least Polluted Year Recorded
2020(Avg.)
29AQI


Londonderry's annual 2025 AQI (29) shows an average percentage change of -4.6% (improved AQI) compared to previous years: 2020 (29), 2021 (32), 2022 (31), 2023 (32), 2024 (31).