Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Stanmore, Harrow, United Kingdom 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

Stanmore, Harrow, United Kingdom

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
19th Aug 2024
59AQI
Lowest AQI recorded on
14th Aug 2023
14AQI

Same Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 22 of Good air quality, showing improvement over 2024 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 1st Aug - 2nd Aug 2025

Stanmore, Harrow, United Kingdom

AQI
Day
Night
.

5 AM1st Aug 2025

9 PM

4 AM2nd Aug 2025

Day time
Avg. Highest Time
1PM1st Aug

24AQI

Avg. Lowest Time
5PM1st Aug

19AQI

Night time
Avg. Highest Time
10PM1st Aug

23AQI

Avg. Lowest Time
4AM2nd Aug

20AQI

In the last 24 hours,

Stanmore's AQI reached its highest point of 24 at 1 PM during the Day, while the lowest point, 19, was recorded at 5 PM during the Day between 1st Aug and 2nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Stanmore, Harrow, United Kingdom

JulAug
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 2025175 AMAQI
3rd Jul 2025176 AMAQI
3rd Jul 2025177 AMAQI
3rd Jul 2025178 AMAQI
3rd Jul 2025179 AMAQI
3rd Jul 20251710 AMAQI
3rd Jul 20251911 AMAQI
3rd Jul 20251812 PMAQI
3rd Jul 2025181 PMAQI
3rd Jul 2025182 PMAQI
3rd Jul 2025173 PMAQI
3rd Jul 2025184 PMAQI
3rd Jul 2025195 PMAQI
3rd Jul 2025206 PMAQI
3rd Jul 2025217 PMAQI
3rd Jul 2025208 PMAQI
3rd Jul 2025189 PMAQI
3rd Jul 20251810 PMAQI
3rd Jul 20251811 PMAQI
4th Jul 20251812 AMAQI
4th Jul 2025181 AMAQI
4th Jul 2025182 AMAQI
4th Jul 2025183 AMAQI
4th Jul 2025194 AMAQI

19°C12/25°C

4th Jul 2025205 AMAQI
4th Jul 2025206 AMAQI
4th Jul 2025207 AMAQI
4th Jul 2025248 AMAQI
4th Jul 2025219 AMAQI
4th Jul 20252010 AMAQI
4th Jul 20252011 AMAQI
4th Jul 20251912 PMAQI
4th Jul 2025181 PMAQI
4th Jul 2025182 PMAQI
4th Jul 2025183 PMAQI
4th Jul 2025184 PMAQI
4th Jul 2025185 PMAQI
4th Jul 2025206 PMAQI
4th Jul 2025197 PMAQI
4th Jul 2025188 PMAQI
4th Jul 2025189 PMAQI
4th Jul 20251810 PMAQI
4th Jul 20252011 PMAQI
5th Jul 20252112 AMAQI
5th Jul 2025191 AMAQI
5th Jul 2025202 AMAQI
5th Jul 2025183 AMAQI
5th Jul 2025194 AMAQI

20°C14/26°C

5th Jul 2025195 AMAQI
5th Jul 2025176 AMAQI
5th Jul 2025177 AMAQI
5th Jul 2025178 AMAQI
5th Jul 2025199 AMAQI
5th Jul 20252110 AMAQI
5th Jul 20251911 AMAQI
5th Jul 20251712 PMAQI
5th Jul 2025181 PMAQI
5th Jul 2025172 PMAQI
5th Jul 2025183 PMAQI
5th Jul 2025184 PMAQI
5th Jul 2025185 PMAQI
5th Jul 2025186 PMAQI
5th Jul 2025187 PMAQI
5th Jul 2025188 PMAQI
5th Jul 2025209 PMAQI
5th Jul 20252310 PMAQI
5th Jul 20252211 PMAQI
6th Jul 20252012 AMAQI
6th Jul 2025201 AMAQI
6th Jul 2025182 AMAQI
6th Jul 2025173 AMAQI
6th Jul 2025174 AMAQI

17°C15/19°C

6th Jul 2025175 AMAQI
6th Jul 2025166 AMAQI
6th Jul 2025167 AMAQI
6th Jul 2025178 AMAQI
6th Jul 2025159 AMAQI
6th Jul 20251710 AMAQI
6th Jul 20251611 AMAQI
6th Jul 20251612 PMAQI
6th Jul 2025161 PMAQI
6th Jul 2025172 PMAQI
6th Jul 2025173 PMAQI
6th Jul 2025174 PMAQI
6th Jul 2025175 PMAQI
6th Jul 2025176 PMAQI
6th Jul 2025177 PMAQI
6th Jul 2025178 PMAQI
6th Jul 2025189 PMAQI
6th Jul 20251910 PMAQI
6th Jul 20251911 PMAQI
7th Jul 20252012 AMAQI
7th Jul 2025181 AMAQI
7th Jul 2025152 AMAQI
7th Jul 2025153 AMAQI
7th Jul 2025164 AMAQI

18°C15/21°C

7th Jul 2025185 AMAQI
7th Jul 2025186 AMAQI
7th Jul 2025177 AMAQI
7th Jul 2025188 AMAQI
7th Jul 2025179 AMAQI
7th Jul 20252010 AMAQI
7th Jul 20251811 AMAQI
7th Jul 20251912 PMAQI
7th Jul 2025171 PMAQI
7th Jul 2025172 PMAQI
7th Jul 2025173 PMAQI
7th Jul 2025174 PMAQI
7th Jul 2025175 PMAQI
7th Jul 2025176 PMAQI
7th Jul 2025187 PMAQI
7th Jul 2025188 PMAQI
7th Jul 2025189 PMAQI
7th Jul 20251910 PMAQI
7th Jul 20252211 PMAQI
8th Jul 20252512 AMAQI
8th Jul 2025241 AMAQI
8th Jul 2025252 AMAQI
8th Jul 2025263 AMAQI
8th Jul 2025224 AMAQI

17°C12/22°C

8th Jul 2025195 AMAQI
8th Jul 2025186 AMAQI
8th Jul 2025187 AMAQI
8th Jul 2025208 AMAQI
8th Jul 2025199 AMAQI
8th Jul 20252010 AMAQI
8th Jul 20252111 AMAQI
8th Jul 20252012 PMAQI
8th Jul 2025221 PMAQI
8th Jul 2025212 PMAQI
8th Jul 2025203 PMAQI
8th Jul 2025204 PMAQI
8th Jul 2025215 PMAQI
8th Jul 2025196 PMAQI
8th Jul 2025207 PMAQI
8th Jul 2025208 PMAQI
8th Jul 2025229 PMAQI
8th Jul 20252210 PMAQI
8th Jul 20252211 PMAQI
9th Jul 20252212 AMAQI
9th Jul 2025201 AMAQI
9th Jul 2025282 AMAQI
9th Jul 2025203 AMAQI
9th Jul 2025204 AMAQI

18°C11/24°C

9th Jul 2025215 AMAQI
9th Jul 2025226 AMAQI
9th Jul 2025257 AMAQI
9th Jul 2025248 AMAQI
9th Jul 2025269 AMAQI
9th Jul 20252910 AMAQI
9th Jul 20252011 AMAQI
9th Jul 20251812 PMAQI
9th Jul 2025211 PMAQI
9th Jul 2025222 PMAQI
9th Jul 2025213 PMAQI
9th Jul 2025224 PMAQI
9th Jul 2025215 PMAQI
9th Jul 2025216 PMAQI
9th Jul 2025207 PMAQI
9th Jul 2025268 PMAQI
9th Jul 2025259 PMAQI
9th Jul 20252410 PMAQI
9th Jul 20252411 PMAQI
10th Jul 20252312 AMAQI
10th Jul 2025221 AMAQI
10th Jul 2025212 AMAQI
10th Jul 2025203 AMAQI
10th Jul 2025224 AMAQI

20°C13/26°C

10th Jul 2025195 AMAQI
10th Jul 2025246 AMAQI
10th Jul 2025247 AMAQI
10th Jul 2025238 AMAQI
10th Jul 2025219 AMAQI
10th Jul 20251910 AMAQI
10th Jul 20251911 AMAQI
10th Jul 20252012 PMAQI
10th Jul 2025201 PMAQI
10th Jul 2025212 PMAQI
10th Jul 2025203 PMAQI
10th Jul 2025214 PMAQI
10th Jul 2025205 PMAQI
10th Jul 2025236 PMAQI
10th Jul 2025207 PMAQI
10th Jul 2025278 PMAQI
10th Jul 2025209 PMAQI
10th Jul 20252010 PMAQI
10th Jul 20252011 PMAQI
11th Jul 20252012 AMAQI
11th Jul 2025211 AMAQI
11th Jul 2025232 AMAQI
11th Jul 2025223 AMAQI
11th Jul 2025244 AMAQI

24°C18/30°C

11th Jul 2025225 AMAQI
11th Jul 2025246 AMAQI
11th Jul 2025287 AMAQI
11th Jul 2025288 AMAQI
11th Jul 2025269 AMAQI
11th Jul 20252410 AMAQI
11th Jul 20252611 AMAQI
11th Jul 20252412 PMAQI
11th Jul 2025271 PMAQI
11th Jul 2025292 PMAQI
11th Jul 2025283 PMAQI
11th Jul 2025264 PMAQI
11th Jul 2025265 PMAQI
11th Jul 2025266 PMAQI
11th Jul 2025277 PMAQI
11th Jul 2025258 PMAQI
11th Jul 2025239 PMAQI
11th Jul 20252610 PMAQI
11th Jul 20252311 PMAQI
12th Jul 20252212 AMAQI
12th Jul 2025231 AMAQI
12th Jul 2025242 AMAQI
12th Jul 2025243 AMAQI
12th Jul 2025244 AMAQI

25°C18/31°C

12th Jul 2025245 AMAQI
12th Jul 2025276 AMAQI
12th Jul 2025267 AMAQI
12th Jul 2025268 AMAQI
12th Jul 2025269 AMAQI
12th Jul 20252810 AMAQI
12th Jul 20252611 AMAQI
12th Jul 20252412 PMAQI
12th Jul 2025381 PMAQI
12th Jul 2025452 PMAQI
12th Jul 2025333 PMAQI
12th Jul 2025354 PMAQI
12th Jul 2025355 PMAQI
12th Jul 2025356 PMAQI
12th Jul 2025537 PMAQI
12th Jul 2025478 PMAQI
12th Jul 2025299 PMAQI
12th Jul 20252610 PMAQI
12th Jul 20252811 PMAQI
13th Jul 20252612 AMAQI
13th Jul 2025281 AMAQI
13th Jul 2025242 AMAQI
13th Jul 2025213 AMAQI
13th Jul 2025254 AMAQI

24°C19/30°C

13th Jul 2025235 AMAQI
13th Jul 2025266 AMAQI
13th Jul 2025357 AMAQI
13th Jul 2025258 AMAQI
13th Jul 2025359 AMAQI
13th Jul 20253410 AMAQI
13th Jul 20253411 AMAQI
13th Jul 20253212 PMAQI
13th Jul 2025411 PMAQI
13th Jul 2025432 PMAQI
13th Jul 2025383 PMAQI
13th Jul 2025404 PMAQI
13th Jul 2025325 PMAQI
13th Jul 2025306 PMAQI
13th Jul 2025297 PMAQI
13th Jul 2025288 PMAQI
13th Jul 2025279 PMAQI
13th Jul 20253010 PMAQI
13th Jul 20252811 PMAQI
14th Jul 20252912 AMAQI
14th Jul 2025321 AMAQI
14th Jul 2025342 AMAQI
14th Jul 2025323 AMAQI
14th Jul 2025334 AMAQI

23°C16/30°C

14th Jul 2025375 AMAQI
14th Jul 2025366 AMAQI
14th Jul 2025377 AMAQI
14th Jul 2025408 AMAQI
14th Jul 2025409 AMAQI
14th Jul 20253510 AMAQI
14th Jul 20252811 AMAQI
14th Jul 20252812 PMAQI
14th Jul 2025311 PMAQI
14th Jul 2025322 PMAQI
14th Jul 2025303 PMAQI
14th Jul 2025314 PMAQI
14th Jul 2025305 PMAQI
14th Jul 2025306 PMAQI
14th Jul 2025317 PMAQI
14th Jul 2025308 PMAQI
14th Jul 2025329 PMAQI
14th Jul 20253310 PMAQI
14th Jul 20253211 PMAQI
15th Jul 20253312 AMAQI
15th Jul 2025281 AMAQI
15th Jul 2025232 AMAQI
15th Jul 2025203 AMAQI
15th Jul 2025224 AMAQI

21°C16/26°C

15th Jul 2025245 AMAQI
15th Jul 2025246 AMAQI
15th Jul 2025237 AMAQI
15th Jul 2025248 AMAQI
15th Jul 2025239 AMAQI
15th Jul 20252410 AMAQI
15th Jul 20252411 AMAQI
15th Jul 20252412 PMAQI
15th Jul 2025241 PMAQI
15th Jul 2025262 PMAQI
15th Jul 2025243 PMAQI
15th Jul 2025244 PMAQI
15th Jul 2025235 PMAQI
15th Jul 2025246 PMAQI
15th Jul 2025257 PMAQI
15th Jul 2025268 PMAQI
15th Jul 2025269 PMAQI
15th Jul 20252510 PMAQI
15th Jul 20252211 PMAQI
16th Jul 20252512 AMAQI
16th Jul 2025241 AMAQI
16th Jul 2025232 AMAQI
16th Jul 2025203 AMAQI
16th Jul 2025214 AMAQI

18°C13/22°C

16th Jul 2025195 AMAQI
16th Jul 2025226 AMAQI
16th Jul 2025197 AMAQI
16th Jul 2025228 AMAQI
16th Jul 2025229 AMAQI
16th Jul 20252210 AMAQI
16th Jul 20252211 AMAQI
16th Jul 20252212 PMAQI
16th Jul 2025221 PMAQI
16th Jul 2025212 PMAQI
16th Jul 2025223 PMAQI
16th Jul 2025234 PMAQI
16th Jul 2025225 PMAQI
16th Jul 2025226 PMAQI
16th Jul 2025227 PMAQI
16th Jul 2025208 PMAQI
16th Jul 2025239 PMAQI
16th Jul 20252210 PMAQI
16th Jul 20252211 PMAQI
17th Jul 20252212 AMAQI
17th Jul 2025231 AMAQI
17th Jul 2025222 AMAQI
17th Jul 2025213 AMAQI
17th Jul 2025194 AMAQI

21°C15/27°C

17th Jul 2025225 AMAQI
17th Jul 2025206 AMAQI
17th Jul 2025257 AMAQI
17th Jul 2025258 AMAQI
17th Jul 2025239 AMAQI
17th Jul 20252210 AMAQI
17th Jul 20252211 AMAQI
17th Jul 20252212 PMAQI
17th Jul 2025221 PMAQI
17th Jul 2025202 PMAQI
17th Jul 2025193 PMAQI
17th Jul 2025234 PMAQI
17th Jul 2025215 PMAQI
17th Jul 2025206 PMAQI
17th Jul 2025207 PMAQI
17th Jul 2025208 PMAQI
17th Jul 2025229 PMAQI
17th Jul 20252210 PMAQI
17th Jul 20252211 PMAQI
18th Jul 20252412 AMAQI
18th Jul 2025231 AMAQI
18th Jul 2025182 AMAQI
18th Jul 2025183 AMAQI
18th Jul 2025184 AMAQI

21°C18/26°C

18th Jul 2025195 AMAQI
18th Jul 2025206 AMAQI
18th Jul 2025227 AMAQI
18th Jul 2025228 AMAQI
18th Jul 2025249 AMAQI
18th Jul 20252410 AMAQI
18th Jul 20253111 AMAQI
18th Jul 20252812 PMAQI
18th Jul 2025221 PMAQI
18th Jul 2025232 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025224 PMAQI
18th Jul 2025255 PMAQI
18th Jul 2025266 PMAQI
18th Jul 2025267 PMAQI
18th Jul 2025258 PMAQI
18th Jul 2025249 PMAQI
18th Jul 20252310 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252112 AMAQI
19th Jul 2025221 AMAQI
19th Jul 2025232 AMAQI
19th Jul 2025203 AMAQI
19th Jul 2025194 AMAQI

24°C18/30°C

19th Jul 2025205 AMAQI
19th Jul 2025226 AMAQI
19th Jul 2025247 AMAQI
19th Jul 2025248 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20252310 AMAQI
19th Jul 20252211 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025211 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025383 PMAQI
19th Jul 2025454 PMAQI
19th Jul 2025305 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025237 PMAQI
19th Jul 2025238 PMAQI
19th Jul 2025249 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252211 PMAQI
20th Jul 20252312 AMAQI
20th Jul 2025261 AMAQI
20th Jul 2025282 AMAQI
20th Jul 2025213 AMAQI
20th Jul 2025224 AMAQI

19°C17/22°C

20th Jul 2025245 AMAQI
20th Jul 2025216 AMAQI
20th Jul 2025217 AMAQI
20th Jul 2025188 AMAQI
20th Jul 2025199 AMAQI
20th Jul 20251910 AMAQI
20th Jul 20251811 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025212 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025237 PMAQI
20th Jul 2025228 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252210 PMAQI
20th Jul 20252311 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025172 AMAQI
21st Jul 2025163 AMAQI
21st Jul 2025164 AMAQI

18°C16/22°C

21st Jul 2025185 AMAQI
21st Jul 2025186 AMAQI
21st Jul 2025187 AMAQI
21st Jul 2025188 AMAQI
21st Jul 2025199 AMAQI
21st Jul 20252010 AMAQI
21st Jul 20252111 AMAQI
21st Jul 20252012 PMAQI
21st Jul 2025201 PMAQI
21st Jul 2025202 PMAQI
21st Jul 2025203 PMAQI
21st Jul 2025204 PMAQI
21st Jul 2025205 PMAQI
21st Jul 2025206 PMAQI
21st Jul 2025197 PMAQI
21st Jul 2025208 PMAQI
21st Jul 2025229 PMAQI
21st Jul 20252110 PMAQI
21st Jul 20251911 PMAQI
22nd Jul 20252012 AMAQI
22nd Jul 2025191 AMAQI
22nd Jul 2025182 AMAQI
22nd Jul 2025173 AMAQI
22nd Jul 2025174 AMAQI

18°C14/23°C

22nd Jul 2025185 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025197 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251910 AMAQI
22nd Jul 20251711 AMAQI
22nd Jul 20251612 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025162 PMAQI
22nd Jul 2025163 PMAQI
22nd Jul 2025194 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025188 PMAQI
22nd Jul 2025199 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20251912 AMAQI
23rd Jul 2025181 AMAQI
23rd Jul 2025182 AMAQI
23rd Jul 2025173 AMAQI
23rd Jul 2025164 AMAQI

19°C14/24°C

23rd Jul 2025175 AMAQI
23rd Jul 2025186 AMAQI
23rd Jul 2025207 AMAQI
23rd Jul 2025208 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252310 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20253112 PMAQI
23rd Jul 2025361 PMAQI
23rd Jul 2025422 PMAQI
23rd Jul 2025493 PMAQI
23rd Jul 2025534 PMAQI
23rd Jul 2025525 PMAQI
23rd Jul 2025556 PMAQI
23rd Jul 2025547 PMAQI
23rd Jul 2025478 PMAQI
23rd Jul 2025419 PMAQI
23rd Jul 20254110 PMAQI
23rd Jul 20253911 PMAQI
24th Jul 20253812 AMAQI
24th Jul 2025361 AMAQI
24th Jul 2025532 AMAQI
24th Jul 2025543 AMAQI
24th Jul 2025544 AMAQI

19°C15/23°C

24th Jul 2025525 AMAQI
24th Jul 2025546 AMAQI
24th Jul 2025557 AMAQI
24th Jul 2025558 AMAQI
24th Jul 2025549 AMAQI
24th Jul 20255210 AMAQI
24th Jul 20255011 AMAQI
24th Jul 20255212 PMAQI
24th Jul 2025511 PMAQI
24th Jul 2025422 PMAQI
24th Jul 2025333 PMAQI
24th Jul 2025334 PMAQI
24th Jul 2025375 PMAQI
24th Jul 2025386 PMAQI
24th Jul 2025407 PMAQI
24th Jul 2025388 PMAQI
24th Jul 2025389 PMAQI
24th Jul 20253710 PMAQI
24th Jul 20253711 PMAQI
25th Jul 20253812 AMAQI
25th Jul 2025351 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025343 AMAQI
25th Jul 2025304 AMAQI

17°C15/20°C

25th Jul 2025265 AMAQI
25th Jul 2025236 AMAQI
25th Jul 2025307 AMAQI
25th Jul 2025318 AMAQI
25th Jul 2025279 AMAQI
25th Jul 20252910 AMAQI
25th Jul 20253211 AMAQI
25th Jul 20253912 PMAQI
25th Jul 2025411 PMAQI
25th Jul 2025472 PMAQI
25th Jul 2025473 PMAQI
25th Jul 2025504 PMAQI
25th Jul 2025475 PMAQI
25th Jul 2025466 PMAQI
25th Jul 2025487 PMAQI
25th Jul 2025488 PMAQI
25th Jul 2025449 PMAQI
25th Jul 20254510 PMAQI
25th Jul 20254611 PMAQI
26th Jul 20254812 AMAQI
26th Jul 2025471 AMAQI
26th Jul 2025402 AMAQI
26th Jul 2025423 AMAQI
26th Jul 2025414 AMAQI

21°C15/26°C

26th Jul 2025485 AMAQI
26th Jul 2025446 AMAQI
26th Jul 2025407 AMAQI
26th Jul 2025408 AMAQI
26th Jul 2025409 AMAQI
26th Jul 20254010 AMAQI
26th Jul 20253411 AMAQI
26th Jul 20253212 PMAQI
26th Jul 2025341 PMAQI
26th Jul 2025342 PMAQI
26th Jul 2025343 PMAQI
26th Jul 2025314 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025296 PMAQI
26th Jul 2025307 PMAQI
26th Jul 2025318 PMAQI
26th Jul 2025369 PMAQI
26th Jul 20253610 PMAQI
26th Jul 20253811 PMAQI
27th Jul 20254012 AMAQI
27th Jul 2025411 AMAQI
27th Jul 2025282 AMAQI
27th Jul 2025223 AMAQI
27th Jul 2025224 AMAQI

19°C16/23°C

27th Jul 2025195 AMAQI
27th Jul 2025186 AMAQI
27th Jul 2025207 AMAQI
27th Jul 2025228 AMAQI
27th Jul 2025229 AMAQI
27th Jul 20252110 AMAQI
27th Jul 20252711 AMAQI
27th Jul 20252612 PMAQI
27th Jul 2025241 PMAQI
27th Jul 2025252 PMAQI
27th Jul 2025263 PMAQI
27th Jul 2025264 PMAQI
27th Jul 2025275 PMAQI
27th Jul 2025266 PMAQI
27th Jul 2025277 PMAQI
27th Jul 2025278 PMAQI
27th Jul 2025269 PMAQI
27th Jul 20252610 PMAQI
27th Jul 20252711 PMAQI
28th Jul 20252812 AMAQI
28th Jul 2025271 AMAQI
28th Jul 2025282 AMAQI
28th Jul 2025293 AMAQI
28th Jul 2025264 AMAQI

18°C15/22°C

28th Jul 2025295 AMAQI
28th Jul 2025306 AMAQI
28th Jul 2025307 AMAQI
28th Jul 2025318 AMAQI
28th Jul 2025299 AMAQI
28th Jul 20252810 AMAQI
28th Jul 20252911 AMAQI
28th Jul 20252612 PMAQI
28th Jul 2025261 PMAQI
28th Jul 2025272 PMAQI
28th Jul 2025263 PMAQI
28th Jul 2025264 PMAQI
28th Jul 2025285 PMAQI
28th Jul 2025286 PMAQI
28th Jul 2025267 PMAQI
28th Jul 2025288 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20252810 PMAQI
28th Jul 20252911 PMAQI
29th Jul 20253012 AMAQI
29th Jul 2025311 AMAQI
29th Jul 2025282 AMAQI
29th Jul 2025253 AMAQI
29th Jul 2025244 AMAQI

19°C14/23°C

29th Jul 2025235 AMAQI
29th Jul 2025226 AMAQI
29th Jul 2025227 AMAQI
29th Jul 2025228 AMAQI
29th Jul 2025229 AMAQI
29th Jul 20252310 AMAQI
29th Jul 20252411 AMAQI
29th Jul 20252312 PMAQI
29th Jul 2025241 PMAQI
29th Jul 2025232 PMAQI
29th Jul 2025223 PMAQI
29th Jul 2025234 PMAQI
29th Jul 2025225 PMAQI
29th Jul 2025226 PMAQI
29th Jul 2025247 PMAQI
29th Jul 2025248 PMAQI
29th Jul 2025279 PMAQI
29th Jul 20252810 PMAQI
29th Jul 20253011 PMAQI
30th Jul 20253012 AMAQI
30th Jul 2025341 AMAQI
30th Jul 2025402 AMAQI
30th Jul 2025483 AMAQI
30th Jul 2025464 AMAQI

17°C14/21°C

30th Jul 2025345 AMAQI
30th Jul 2025326 AMAQI
30th Jul 2025347 AMAQI
30th Jul 2025368 AMAQI
30th Jul 2025349 AMAQI
30th Jul 20252910 AMAQI
30th Jul 20252411 AMAQI
30th Jul 20252212 PMAQI
30th Jul 2025241 PMAQI
30th Jul 2025252 PMAQI
30th Jul 2025223 PMAQI
30th Jul 2025224 PMAQI
30th Jul 2025225 PMAQI
30th Jul 2025226 PMAQI
30th Jul 2025227 PMAQI
30th Jul 2025238 PMAQI
30th Jul 2025239 PMAQI
30th Jul 20252310 PMAQI
30th Jul 20252311 PMAQI
31st Jul 20252312 AMAQI
31st Jul 2025231 AMAQI
31st Jul 2025232 AMAQI
31st Jul 2025223 AMAQI
31st Jul 2025214 AMAQI

19°C15/24°C

31st Jul 2025225 AMAQI
31st Jul 2025226 AMAQI
31st Jul 2025217 AMAQI
31st Jul 2025228 AMAQI
31st Jul 2025229 AMAQI
31st Jul 20252310 AMAQI
31st Jul 20252711 AMAQI
31st Jul 20252212 PMAQI
31st Jul 2025221 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025233 PMAQI
31st Jul 2025244 PMAQI
31st Jul 2025235 PMAQI
31st Jul 2025266 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025268 PMAQI
31st Jul 2025239 PMAQI
31st Jul 20252410 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252612 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025262 AMAQI
1st Aug 2025223 AMAQI
1st Aug 2025224 AMAQI

19°C16/25°C

1st Aug 2025205 AMAQI
1st Aug 2025216 AMAQI
1st Aug 2025207 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025229 AMAQI
1st Aug 20252210 AMAQI
1st Aug 20252111 AMAQI
1st Aug 20252312 PMAQI
1st Aug 2025241 PMAQI
1st Aug 2025242 PMAQI
1st Aug 2025233 PMAQI
1st Aug 2025214 PMAQI
1st Aug 2025195 PMAQI
1st Aug 2025226 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025228 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252310 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252212 AMAQI
2nd Aug 2025221 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025223 AMAQI
2nd Aug 2025204 AMAQI

17°C13/21°C

2nd Aug 2025205 AMAQI
5 AM
2nd Aug 2025226 AMAQI
2nd Aug 2025207 AMAQI
2nd Aug 2025188 AMAQI
2nd Aug 2025209 AMAQI
2nd Aug 20251910 AMAQI
2nd Aug 20251611 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025221 PMAQI
1 PM
2nd Aug 2025222 PMAQI
9 PM
1 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 9 PM

25AQI

17 hours / Day
510 hours / Month
Avg. Lowest Time
5 AM - 9 PM

25AQI

17 hours / Day
510 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 9 PM (Avg. 25), while the lowest AQI was between 5 AM to 9 PM (Avg. 25).
Night time
Avg. Highest Time
12 AM - 11 PM

25AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
12 AM - 4 AM

25AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 25), while the lowest AQI was between 12 AM to 4 AM (Avg. 25).

2025 Days Vs Air Quality

Stanmore, Harrow, United Kingdom

2025

70%

150

29%

62

0.4%

1

Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)

Good
150 Days
Moderate
62 Days
Poor
1 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 70%

Health Risk Level:

Low

In 2025, 70% of 214 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

Stanmore, Harrow, United Kingdom

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
28AQI
2nd January 2025
34AQI
3rd January 2025
44AQI
4th January 2025
54AQI
5th January 2025
31AQI
6th January 2025
23AQI
7th January 2025
25AQI
8th January 2025
37AQI
9th January 2025
51AQI
10th January 2025
63AQI
11th January 2025
89AQI
12th January 2025
89AQI
13th January 2025
56AQI
14th January 2025
54AQI
15th January 2025
56AQI
16th January 2025
53AQI
17th January 2025
58AQI
18th January 2025
76AQI
19th January 2025
69AQI
20th January 2025
66AQI
21st January 2025
69AQI
22nd January 2025
78AQI
23rd January 2025
57AQI
24th January 2025
46AQI
25th January 2025
38AQI
26th January 2025
33AQI
27th January 2025
27AQI
28th January 2025
26AQI
29th January 2025
28AQI
30th January 2025
30AQI
31st January 2025
35AQI
1st February 2025
40AQI
2nd February 2025
57AQI
3rd February 2025
60AQI
4th February 2025
39AQI
5th February 2025
48AQI
6th February 2025
51AQI
7th February 2025
46AQI
8th February 2025
65AQI
9th February 2025
71AQI
10th February 2025
80AQI
11th February 2025
76AQI
12th February 2025
70AQI
13th February 2025
69AQI
14th February 2025
66AQI
15th February 2025
80AQI
16th February 2025
70AQI
17th February 2025
64AQI
18th February 2025
74AQI
19th February 2025
83AQI
20th February 2025
45AQI
21st February 2025
36AQI
22nd February 2025
43AQI
23rd February 2025
33AQI
24th February 2025
27AQI
25th February 2025
35AQI
26th February 2025
28AQI
27th February 2025
31AQI
28th February 2025
50AQI
1st March 2025
52AQI
2nd March 2025
59AQI
3rd March 2025
65AQI
4th March 2025
66AQI
5th March 2025
80AQI
6th March 2025
79AQI
7th March 2025
56AQI
8th March 2025
63AQI
9th March 2025
84AQI
10th March 2025
126AQI
11th March 2025
59AQI
12th March 2025
48AQI
13th March 2025
42AQI
14th March 2025
52AQI
15th March 2025
38AQI
16th March 2025
42AQI
17th March 2025
46AQI
18th March 2025
53AQI
19th March 2025
70AQI
20th March 2025
65AQI
21st March 2025
74AQI
22nd March 2025
55AQI
23rd March 2025
80AQI
24th March 2025
88AQI
25th March 2025
80AQI
26th March 2025
58AQI
27th March 2025
49AQI
28th March 2025
33AQI
29th March 2025
32AQI
30th March 2025
34AQI
31st March 2025
38AQI
1st April 2025
38AQI
2nd April 2025
41AQI
3rd April 2025
56AQI
4th April 2025
64AQI
5th April 2025
40AQI
6th April 2025
29AQI
7th April 2025
32AQI
8th April 2025
46AQI
9th April 2025
40AQI
10th April 2025
42AQI
11th April 2025
59AQI
12th April 2025
63AQI
13th April 2025
49AQI
14th April 2025
32AQI
15th April 2025
45AQI
16th April 2025
26AQI
17th April 2025
31AQI
18th April 2025
36AQI
19th April 2025
43AQI
20th April 2025
29AQI
21st April 2025
41AQI
22nd April 2025
28AQI
23rd April 2025
23AQI
24th April 2025
43AQI
25th April 2025
44AQI
26th April 2025
57AQI
27th April 2025
66AQI
28th April 2025
47AQI
29th April 2025
54AQI
30th April 2025
54AQI
1st May 2025
59AQI
2nd May 2025
54AQI
3rd May 2025
50AQI
4th May 2025
25AQI
5th May 2025
22AQI
6th May 2025
26AQI
7th May 2025
35AQI
8th May 2025
22AQI
9th May 2025
31AQI
10th May 2025
29AQI
11th May 2025
33AQI
12th May 2025
36AQI
13th May 2025
38AQI
14th May 2025
36AQI
15th May 2025
35AQI
16th May 2025
40AQI
17th May 2025
36AQI
18th May 2025
45AQI
19th May 2025
37AQI
20th May 2025
32AQI
21st May 2025
38AQI
22nd May 2025
31AQI
23rd May 2025
30AQI
24th May 2025
26AQI
25th May 2025
19AQI
26th May 2025
22AQI
27th May 2025
20AQI
28th May 2025
17AQI
29th May 2025
21AQI
30th May 2025
20AQI
31st May 2025
22AQI
1st June 2025
24AQI
2nd June 2025
21AQI
3rd June 2025
23AQI
4th June 2025
22AQI
5th June 2025
19AQI
6th June 2025
16AQI
7th June 2025
15AQI
8th June 2025
20AQI
9th June 2025
57AQI
10th June 2025
39AQI
11th June 2025
36AQI
12th June 2025
46AQI
13th June 2025
37AQI
14th June 2025
36AQI
15th June 2025
27AQI
16th June 2025
26AQI
17th June 2025
30AQI
18th June 2025
32AQI
19th June 2025
40AQI
20th June 2025
47AQI
21st June 2025
47AQI
22nd June 2025
50AQI
23rd June 2025
22AQI
24th June 2025
22AQI
25th June 2025
18AQI
26th June 2025
18AQI
27th June 2025
21AQI
28th June 2025
17AQI
29th June 2025
18AQI
30th June 2025
23AQI
1st July 2025
33AQI
2nd July 2025
32AQI
3rd July 2025
19AQI
4th July 2025
19AQI
5th July 2025
19AQI
6th July 2025
17AQI
7th July 2025
18AQI
8th July 2025
21AQI
9th July 2025
23AQI
10th July 2025
21AQI
11th July 2025
25AQI
12th July 2025
30AQI
13th July 2025
30AQI
14th July 2025
33AQI
15th July 2025
24AQI
16th July 2025
22AQI
17th July 2025
22AQI
18th July 2025
23AQI
19th July 2025
24AQI
20th July 2025
22AQI
21st July 2025
19AQI
22nd July 2025
18AQI
23rd July 2025
33AQI
24th July 2025
45AQI
25th July 2025
38AQI
26th July 2025
37AQI
27th July 2025
26AQI
28th July 2025
28AQI
29th July 2025
25AQI
30th July 2025
29AQI
31st July 2025
23AQI
1st August 2025
22AQI

49AQI

55AQI

60AQI

43AQI

32AQI

29AQI

26AQI

22AQI

No. of days

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

202542AQI

15
16
13
15
10
20
1
22
8
29
2
29
1
31
1
150
62
1

Highest AQI recorded in

March

60AQI

Lowest AQI recorded in

August

22AQI

202435AQI

13
3
1
1
1
1
12
30
31
30
1
22
7
26
5
21
9
31
219
25
1

Highest AQI recorded in

March

67AQI

Lowest AQI recorded in

April

4AQI

202339AQI

21
10
17
8
1
25
1
14
14
29
2
22
8
30
1
14
2
1
28
3
202
48
1

Highest AQI recorded in

February

49AQI

Lowest AQI recorded in

August

28AQI

202243AQI

30
1
21
29
2
22
8
25
6
27
3
21
3
1
12
1
23
8
25
5
16
15
252
52

Highest AQI recorded in

December

51AQI

Lowest AQI recorded in

August

22AQI

202143AQI

23
7
23
5
19
10
2
26
4
26
5
23
7
24
7
31
23
6
1
31
30
31
310
51
3

Highest AQI recorded in

September

54AQI

Lowest AQI recorded in

April

33AQI

202038AQI

9
4
13
5
3
18
25
5
28
1
20
9
1
26
4
30
1
19
8
3
25
5
1
213
42
8

Highest AQI recorded in

April

55AQI

Lowest AQI recorded in

July

25AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2022(Avg.)
43AQI
Least Polluted Year Recorded
2024(Avg.)
35AQI

Stanmore's annual 2025 AQI (42) shows an average percentage change of 6.3% (worsened AQI) compared to previous years: 2020 (38), 2021 (43), 2022 (43), 2023 (39), 2024 (35).