Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Horley, Surrey, 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

Horley, Surrey, United Kingdom

2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
19th Aug 2024
59AQI
Lowest AQI recorded on
16th Aug 2024
22AQI

Same Day Analysis (1st August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 23 of Good air quality, showing improvement over 2024 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

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

Horley, Surrey, United Kingdom

AQI
Day
Night
.

5 AM1st Aug 2025

9 PM

4 AM2nd Aug 2025

Day time
Avg. Highest Time
8AM1st Aug

30AQI

Avg. Lowest Time
5PM1st Aug

18AQI

Night time
Avg. Highest Time
3AM2nd Aug

23AQI

Avg. Lowest Time
2AM2nd Aug

20AQI

In the last 24 hours,

Horley's AQI reached its highest point of 30 at 8 AM during the Day, while the lowest point, 18, was recorded at 5 PM during the Day between 1st Aug and 2nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Horley, Surrey, 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 2025165 AMAQI
3rd Jul 2025166 AMAQI
3rd Jul 2025167 AMAQI
3rd Jul 2025168 AMAQI
3rd Jul 2025169 AMAQI
3rd Jul 20252410 AMAQI
3rd Jul 20252011 AMAQI
3rd Jul 20252012 PMAQI
3rd Jul 2025201 PMAQI
3rd Jul 2025192 PMAQI
3rd Jul 2025203 PMAQI
3rd Jul 2025214 PMAQI
3rd Jul 2025225 PMAQI
3rd Jul 2025226 PMAQI
3rd Jul 2025207 PMAQI
3rd Jul 2025248 PMAQI
3rd Jul 2025229 PMAQI
3rd Jul 20252110 PMAQI
3rd Jul 20252311 PMAQI
4th Jul 20252412 AMAQI
4th Jul 2025201 AMAQI
4th Jul 2025212 AMAQI
4th Jul 2025213 AMAQI
4th Jul 2025214 AMAQI

18°C10/24°C

4th Jul 2025225 AMAQI
4th Jul 2025236 AMAQI
4th Jul 2025247 AMAQI
4th Jul 2025248 AMAQI
4th Jul 2025239 AMAQI
4th Jul 20252410 AMAQI
4th Jul 20252211 AMAQI
4th Jul 20252012 PMAQI
4th Jul 2025191 PMAQI
4th Jul 2025192 PMAQI
4th Jul 2025233 PMAQI
4th Jul 2025234 PMAQI
4th Jul 2025225 PMAQI
4th Jul 2025226 PMAQI
4th Jul 2025267 PMAQI
4th Jul 2025288 PMAQI
4th Jul 2025309 PMAQI
4th Jul 20252510 PMAQI
4th Jul 20252311 PMAQI
5th Jul 20252712 AMAQI
5th Jul 2025211 AMAQI
5th Jul 2025192 AMAQI
5th Jul 2025203 AMAQI
5th Jul 2025204 AMAQI

19°C11/26°C

5th Jul 2025215 AMAQI
5th Jul 2025246 AMAQI
5th Jul 2025207 AMAQI
5th Jul 2025228 AMAQI
5th Jul 2025209 AMAQI
5th Jul 20252110 AMAQI
5th Jul 20251911 AMAQI
5th Jul 20251812 PMAQI
5th Jul 2025191 PMAQI
5th Jul 2025202 PMAQI
5th Jul 2025203 PMAQI
5th Jul 2025194 PMAQI
5th Jul 2025205 PMAQI
5th Jul 2025226 PMAQI
5th Jul 2025217 PMAQI
5th Jul 2025258 PMAQI
5th Jul 2025309 PMAQI
5th Jul 20253810 PMAQI
5th Jul 20252611 PMAQI
6th Jul 20252612 AMAQI
6th Jul 2025221 AMAQI
6th Jul 2025202 AMAQI
6th Jul 2025173 AMAQI
6th Jul 2025184 AMAQI

16°C13/19°C

6th Jul 2025185 AMAQI
6th Jul 2025176 AMAQI
6th Jul 2025167 AMAQI
6th Jul 2025208 AMAQI
6th Jul 2025219 AMAQI
6th Jul 20251710 AMAQI
6th Jul 20251911 AMAQI
6th Jul 20251912 PMAQI
6th Jul 2025191 PMAQI
6th Jul 2025182 PMAQI
6th Jul 2025193 PMAQI
6th Jul 2025224 PMAQI
6th Jul 2025265 PMAQI
6th Jul 2025266 PMAQI
6th Jul 2025207 PMAQI
6th Jul 2025198 PMAQI
6th Jul 2025199 PMAQI
6th Jul 20252110 PMAQI
6th Jul 20252511 PMAQI
7th Jul 20253112 AMAQI
7th Jul 2025241 AMAQI
7th Jul 2025192 AMAQI
7th Jul 2025203 AMAQI
7th Jul 2025244 AMAQI

18°C15/22°C

7th Jul 2025235 AMAQI
7th Jul 2025226 AMAQI
7th Jul 2025247 AMAQI
7th Jul 2025268 AMAQI
7th Jul 2025289 AMAQI
7th Jul 20252710 AMAQI
7th Jul 20252711 AMAQI
7th Jul 20252912 PMAQI
7th Jul 2025261 PMAQI
7th Jul 2025202 PMAQI
7th Jul 2025203 PMAQI
7th Jul 2025224 PMAQI
7th Jul 2025195 PMAQI
7th Jul 2025186 PMAQI
7th Jul 2025197 PMAQI
7th Jul 2025198 PMAQI
7th Jul 2025219 PMAQI
7th Jul 20252410 PMAQI
7th Jul 20252611 PMAQI
8th Jul 20253212 AMAQI
8th Jul 2025321 AMAQI
8th Jul 2025322 AMAQI
8th Jul 2025313 AMAQI
8th Jul 2025274 AMAQI

17°C12/23°C

8th Jul 2025225 AMAQI
8th Jul 2025206 AMAQI
8th Jul 2025187 AMAQI
8th Jul 2025208 AMAQI
8th Jul 2025219 AMAQI
8th Jul 20252310 AMAQI
8th Jul 20252211 AMAQI
8th Jul 20252412 PMAQI
8th Jul 2025271 PMAQI
8th Jul 2025242 PMAQI
8th Jul 2025273 PMAQI
8th Jul 2025264 PMAQI
8th Jul 2025275 PMAQI
8th Jul 2025226 PMAQI
8th Jul 2025307 PMAQI
8th Jul 2025278 PMAQI
8th Jul 2025289 PMAQI
8th Jul 20252810 PMAQI
8th Jul 20252811 PMAQI
9th Jul 20253212 AMAQI
9th Jul 2025331 AMAQI
9th Jul 2025302 AMAQI
9th Jul 2025323 AMAQI
9th Jul 2025304 AMAQI

17°C11/24°C

9th Jul 2025285 AMAQI
9th Jul 2025286 AMAQI
9th Jul 2025307 AMAQI
9th Jul 2025268 AMAQI
9th Jul 2025269 AMAQI
9th Jul 20252810 AMAQI
9th Jul 20253211 AMAQI
9th Jul 20252612 PMAQI
9th Jul 2025321 PMAQI
9th Jul 2025222 PMAQI
9th Jul 2025213 PMAQI
9th Jul 2025204 PMAQI
9th Jul 2025185 PMAQI
9th Jul 2025206 PMAQI
9th Jul 2025237 PMAQI
9th Jul 2025228 PMAQI
9th Jul 2025239 PMAQI
9th Jul 20252910 PMAQI
9th Jul 20252811 PMAQI
10th Jul 20252912 AMAQI
10th Jul 2025261 AMAQI
10th Jul 2025272 AMAQI
10th Jul 2025303 AMAQI
10th Jul 2025284 AMAQI

19°C11/25°C

10th Jul 2025345 AMAQI
10th Jul 2025286 AMAQI
10th Jul 2025307 AMAQI
10th Jul 2025288 AMAQI
10th Jul 2025289 AMAQI
10th Jul 20252810 AMAQI
10th Jul 20252911 AMAQI
10th Jul 20252412 PMAQI
10th Jul 2025241 PMAQI
10th Jul 2025222 PMAQI
10th Jul 2025223 PMAQI
10th Jul 2025224 PMAQI
10th Jul 2025205 PMAQI
10th Jul 2025216 PMAQI
10th Jul 2025207 PMAQI
10th Jul 2025258 PMAQI
10th Jul 2025319 PMAQI
10th Jul 20253610 PMAQI
10th Jul 20254011 PMAQI
11th Jul 20253512 AMAQI
11th Jul 2025301 AMAQI
11th Jul 2025332 AMAQI
11th Jul 2025323 AMAQI
11th Jul 2025284 AMAQI

23°C16/30°C

11th Jul 2025305 AMAQI
11th Jul 2025316 AMAQI
11th Jul 2025387 AMAQI
11th Jul 2025398 AMAQI
11th Jul 2025429 AMAQI
11th Jul 20253810 AMAQI
11th Jul 20253611 AMAQI
11th Jul 20253112 PMAQI
11th Jul 2025281 PMAQI
11th Jul 2025282 PMAQI
11th Jul 2025283 PMAQI
11th Jul 2025264 PMAQI
11th Jul 2025245 PMAQI
11th Jul 2025316 PMAQI
11th Jul 2025287 PMAQI
11th Jul 2025308 PMAQI
11th Jul 2025299 PMAQI
11th Jul 20252810 PMAQI
11th Jul 20253011 PMAQI
12th Jul 20253412 AMAQI
12th Jul 2025321 AMAQI
12th Jul 2025272 AMAQI
12th Jul 2025263 AMAQI
12th Jul 2025284 AMAQI

23°C16/30°C

12th Jul 2025285 AMAQI
12th Jul 2025306 AMAQI
12th Jul 2025337 AMAQI
12th Jul 2025328 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20253410 AMAQI
12th Jul 20253611 AMAQI
12th Jul 20253212 PMAQI
12th Jul 2025281 PMAQI
12th Jul 2025252 PMAQI
12th Jul 2025243 PMAQI
12th Jul 2025264 PMAQI
12th Jul 2025265 PMAQI
12th Jul 2025296 PMAQI
12th Jul 2025287 PMAQI
12th Jul 2025328 PMAQI
12th Jul 2025329 PMAQI
12th Jul 20252710 PMAQI
12th Jul 20252711 PMAQI
13th Jul 20252812 AMAQI
13th Jul 2025301 AMAQI
13th Jul 2025312 AMAQI
13th Jul 2025293 AMAQI
13th Jul 2025314 AMAQI

22°C16/29°C

13th Jul 2025285 AMAQI
13th Jul 2025296 AMAQI
13th Jul 2025327 AMAQI
13th Jul 2025268 AMAQI
13th Jul 2025289 AMAQI
13th Jul 20252810 AMAQI
13th Jul 20252811 AMAQI
13th Jul 20253612 PMAQI
13th Jul 2025361 PMAQI
13th Jul 2025392 PMAQI
13th Jul 2025343 PMAQI
13th Jul 2025374 PMAQI
13th Jul 2025365 PMAQI
13th Jul 2025336 PMAQI
13th Jul 2025337 PMAQI
13th Jul 2025398 PMAQI
13th Jul 2025369 PMAQI
13th Jul 20253810 PMAQI
13th Jul 20253711 PMAQI
14th Jul 20253412 AMAQI
14th Jul 2025371 AMAQI
14th Jul 2025382 AMAQI
14th Jul 2025363 AMAQI
14th Jul 2025344 AMAQI

21°C14/29°C

14th Jul 2025385 AMAQI
14th Jul 2025416 AMAQI
14th Jul 2025477 AMAQI
14th Jul 2025528 AMAQI
14th Jul 2025529 AMAQI
14th Jul 20254510 AMAQI
14th Jul 20253411 AMAQI
14th Jul 20252612 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025303 PMAQI
14th Jul 2025314 PMAQI
14th Jul 2025285 PMAQI
14th Jul 2025326 PMAQI
14th Jul 2025327 PMAQI
14th Jul 2025328 PMAQI
14th Jul 2025329 PMAQI
14th Jul 20252510 PMAQI
14th Jul 20252611 PMAQI
15th Jul 20253212 AMAQI
15th Jul 2025261 AMAQI
15th Jul 2025172 AMAQI
15th Jul 2025203 AMAQI
15th Jul 2025204 AMAQI

20°C14/24°C

15th Jul 2025265 AMAQI
15th Jul 2025256 AMAQI
15th Jul 2025247 AMAQI
15th Jul 2025208 AMAQI
15th Jul 2025219 AMAQI
15th Jul 20252310 AMAQI
15th Jul 20252311 AMAQI
15th Jul 20252112 PMAQI
15th Jul 2025221 PMAQI
15th Jul 2025242 PMAQI
15th Jul 2025233 PMAQI
15th Jul 2025244 PMAQI
15th Jul 2025245 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025287 PMAQI
15th Jul 2025248 PMAQI
15th Jul 2025229 PMAQI
15th Jul 20252210 PMAQI
15th Jul 20252411 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025261 AMAQI
16th Jul 2025242 AMAQI
16th Jul 2025243 AMAQI
16th Jul 2025264 AMAQI

17°C11/22°C

16th Jul 2025225 AMAQI
16th Jul 2025256 AMAQI
16th Jul 2025287 AMAQI
16th Jul 2025288 AMAQI
16th Jul 2025219 AMAQI
16th Jul 20252210 AMAQI
16th Jul 20252011 AMAQI
16th Jul 20251812 PMAQI
16th Jul 2025181 PMAQI
16th Jul 2025172 PMAQI
16th Jul 2025183 PMAQI
16th Jul 2025204 PMAQI
16th Jul 2025205 PMAQI
16th Jul 2025216 PMAQI
16th Jul 2025197 PMAQI
16th Jul 2025208 PMAQI
16th Jul 2025249 PMAQI
16th Jul 20252410 PMAQI
16th Jul 20253011 PMAQI
17th Jul 20252412 AMAQI
17th Jul 2025271 AMAQI
17th Jul 2025232 AMAQI
17th Jul 2025263 AMAQI
17th Jul 2025284 AMAQI

21°C14/28°C

17th Jul 2025285 AMAQI
17th Jul 2025286 AMAQI
17th Jul 2025297 AMAQI
17th Jul 2025268 AMAQI
17th Jul 2025289 AMAQI
17th Jul 20252310 AMAQI
17th Jul 20252211 AMAQI
17th Jul 20252012 PMAQI
17th Jul 2025191 PMAQI
17th Jul 2025232 PMAQI
17th Jul 2025223 PMAQI
17th Jul 2025234 PMAQI
17th Jul 2025235 PMAQI
17th Jul 2025216 PMAQI
17th Jul 2025217 PMAQI
17th Jul 2025218 PMAQI
17th Jul 2025229 PMAQI
17th Jul 20252210 PMAQI
17th Jul 20252211 PMAQI
18th Jul 20252212 AMAQI
18th Jul 2025211 AMAQI
18th Jul 2025222 AMAQI
18th Jul 2025243 AMAQI
18th Jul 2025234 AMAQI

21°C18/25°C

18th Jul 2025265 AMAQI
18th Jul 2025256 AMAQI
18th Jul 2025367 AMAQI
18th Jul 2025328 AMAQI
18th Jul 2025319 AMAQI
18th Jul 20252910 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025271 PMAQI
18th Jul 2025242 PMAQI
18th Jul 2025253 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025235 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025247 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025359 PMAQI
18th Jul 20254010 PMAQI
18th Jul 20254111 PMAQI
19th Jul 20253212 AMAQI
19th Jul 2025241 AMAQI
19th Jul 2025232 AMAQI
19th Jul 2025253 AMAQI
19th Jul 2025264 AMAQI

22°C16/29°C

19th Jul 2025265 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025327 AMAQI
19th Jul 2025428 AMAQI
19th Jul 2025369 AMAQI
19th Jul 20253610 AMAQI
19th Jul 20252911 AMAQI
19th Jul 20253512 PMAQI
19th Jul 2025291 PMAQI
19th Jul 2025272 PMAQI
19th Jul 2025303 PMAQI
19th Jul 2025224 PMAQI
19th Jul 2025245 PMAQI
19th Jul 2025326 PMAQI
19th Jul 2025297 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025249 PMAQI
19th Jul 20253610 PMAQI
19th Jul 20254211 PMAQI
20th Jul 20253412 AMAQI
20th Jul 2025351 AMAQI
20th Jul 2025292 AMAQI
20th Jul 2025353 AMAQI
20th Jul 2025364 AMAQI

18°C16/22°C

20th Jul 2025285 AMAQI
20th Jul 2025286 AMAQI
20th Jul 2025307 AMAQI
20th Jul 2025258 AMAQI
20th Jul 2025219 AMAQI
20th Jul 20252210 AMAQI
20th Jul 20252311 AMAQI
20th Jul 20252312 PMAQI
20th Jul 2025231 PMAQI
20th Jul 2025302 PMAQI
20th Jul 2025193 PMAQI
20th Jul 2025194 PMAQI
20th Jul 2025175 PMAQI
20th Jul 2025186 PMAQI
20th Jul 2025177 PMAQI
20th Jul 2025178 PMAQI
20th Jul 2025179 PMAQI
20th Jul 20252510 PMAQI
20th Jul 20252611 PMAQI
21st Jul 20252412 AMAQI
21st Jul 2025221 AMAQI
21st Jul 2025202 AMAQI
21st Jul 2025193 AMAQI
21st Jul 2025184 AMAQI

17°C14/21°C

21st Jul 2025195 AMAQI
21st Jul 2025206 AMAQI
21st Jul 2025207 AMAQI
21st Jul 2025238 AMAQI
21st Jul 2025269 AMAQI
21st Jul 20252510 AMAQI
21st Jul 20251811 AMAQI
21st Jul 20251512 PMAQI
21st Jul 2025161 PMAQI
21st Jul 2025162 PMAQI
21st Jul 2025173 PMAQI
21st Jul 2025164 PMAQI
21st Jul 2025165 PMAQI
21st Jul 2025186 PMAQI
21st Jul 2025187 PMAQI
21st Jul 2025188 PMAQI
21st Jul 2025249 PMAQI
21st Jul 20252510 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252412 AMAQI
22nd Jul 2025201 AMAQI
22nd Jul 2025182 AMAQI
22nd Jul 2025193 AMAQI
22nd Jul 2025194 AMAQI

17°C13/22°C

22nd Jul 2025195 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025207 AMAQI
22nd Jul 2025218 AMAQI
22nd Jul 2025199 AMAQI
22nd Jul 20251910 AMAQI
22nd Jul 20252311 AMAQI
22nd Jul 20251912 PMAQI
22nd Jul 2025141 PMAQI
22nd Jul 2025152 PMAQI
22nd Jul 2025163 PMAQI
22nd Jul 2025164 PMAQI
22nd Jul 2025165 PMAQI
22nd Jul 2025156 PMAQI
22nd Jul 2025157 PMAQI
22nd Jul 2025168 PMAQI
22nd Jul 2025169 PMAQI
22nd Jul 20251610 PMAQI
22nd Jul 20251711 PMAQI
23rd Jul 20251812 AMAQI
23rd Jul 2025181 AMAQI
23rd Jul 2025182 AMAQI
23rd Jul 2025183 AMAQI
23rd Jul 2025184 AMAQI

18°C13/23°C

23rd Jul 2025185 AMAQI
23rd Jul 2025206 AMAQI
23rd Jul 2025187 AMAQI
23rd Jul 2025208 AMAQI
23rd Jul 2025239 AMAQI
23rd Jul 20252410 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025191 PMAQI
23rd Jul 2025192 PMAQI
23rd Jul 2025203 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025285 PMAQI
23rd Jul 2025286 PMAQI
23rd Jul 2025347 PMAQI
23rd Jul 2025358 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253410 PMAQI
23rd Jul 20253311 PMAQI
24th Jul 20254212 AMAQI
24th Jul 2025531 AMAQI
24th Jul 2025552 AMAQI
24th Jul 2025563 AMAQI
24th Jul 2025544 AMAQI

18°C14/23°C

24th Jul 2025465 AMAQI
24th Jul 2025456 AMAQI
24th Jul 2025457 AMAQI
24th Jul 2025488 AMAQI
24th Jul 2025489 AMAQI
24th Jul 20254810 AMAQI
24th Jul 20255311 AMAQI
24th Jul 20254712 PMAQI
24th Jul 2025441 PMAQI
24th Jul 2025412 PMAQI
24th Jul 2025343 PMAQI
24th Jul 2025264 PMAQI
24th Jul 2025275 PMAQI
24th Jul 2025296 PMAQI
24th Jul 2025337 PMAQI
24th Jul 2025388 PMAQI
24th Jul 2025399 PMAQI
24th Jul 20253410 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253412 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025302 AMAQI
25th Jul 2025353 AMAQI
25th Jul 2025344 AMAQI

17°C15/21°C

25th Jul 2025355 AMAQI
25th Jul 2025366 AMAQI
25th Jul 2025407 AMAQI
25th Jul 2025358 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20253410 AMAQI
25th Jul 20253811 AMAQI
25th Jul 20254212 PMAQI
25th Jul 2025361 PMAQI
25th Jul 2025362 PMAQI
25th Jul 2025403 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025435 PMAQI
25th Jul 2025476 PMAQI
25th Jul 2025507 PMAQI
25th Jul 2025538 PMAQI
25th Jul 2025529 PMAQI
25th Jul 20255210 PMAQI
25th Jul 20255111 PMAQI
26th Jul 20255112 AMAQI
26th Jul 2025431 AMAQI
26th Jul 2025522 AMAQI
26th Jul 2025523 AMAQI
26th Jul 2025494 AMAQI

20°C16/25°C

26th Jul 2025515 AMAQI
26th Jul 2025526 AMAQI
26th Jul 2025507 AMAQI
26th Jul 2025508 AMAQI
26th Jul 2025489 AMAQI
26th Jul 20254210 AMAQI
26th Jul 20253811 AMAQI
26th Jul 20253612 PMAQI
26th Jul 2025351 PMAQI
26th Jul 2025262 PMAQI
26th Jul 2025283 PMAQI
26th Jul 2025254 PMAQI
26th Jul 2025265 PMAQI
26th Jul 2025266 PMAQI
26th Jul 2025297 PMAQI
26th Jul 2025288 PMAQI
26th Jul 2025309 PMAQI
26th Jul 20253110 PMAQI
26th Jul 20253011 PMAQI
27th Jul 20253212 AMAQI
27th Jul 2025361 AMAQI
27th Jul 2025282 AMAQI
27th Jul 2025243 AMAQI
27th Jul 2025204 AMAQI

18°C14/22°C

27th Jul 2025225 AMAQI
27th Jul 2025226 AMAQI
27th Jul 2025247 AMAQI
27th Jul 2025228 AMAQI
27th Jul 2025209 AMAQI
27th Jul 20252210 AMAQI
27th Jul 20252411 AMAQI
27th Jul 20252612 PMAQI
27th Jul 2025281 PMAQI
27th Jul 2025282 PMAQI
27th Jul 2025313 PMAQI
27th Jul 2025314 PMAQI
27th Jul 2025285 PMAQI
27th Jul 2025276 PMAQI
27th Jul 2025267 PMAQI
27th Jul 2025288 PMAQI
27th Jul 2025279 PMAQI
27th Jul 20252710 PMAQI
27th Jul 20252911 PMAQI
28th Jul 20253012 AMAQI
28th Jul 2025281 AMAQI
28th Jul 2025282 AMAQI
28th Jul 2025283 AMAQI
28th Jul 2025324 AMAQI

18°C15/23°C

28th Jul 2025305 AMAQI
28th Jul 2025326 AMAQI
28th Jul 2025357 AMAQI
28th Jul 2025358 AMAQI
28th Jul 2025339 AMAQI
28th Jul 20252810 AMAQI
28th Jul 20252811 AMAQI
28th Jul 20252812 PMAQI
28th Jul 2025261 PMAQI
28th Jul 2025252 PMAQI
28th Jul 2025263 PMAQI
28th Jul 2025254 PMAQI
28th Jul 2025275 PMAQI
28th Jul 2025286 PMAQI
28th Jul 2025287 PMAQI
28th Jul 2025318 PMAQI
28th Jul 2025299 PMAQI
28th Jul 20253010 PMAQI
28th Jul 20253111 PMAQI
29th Jul 20253212 AMAQI
29th Jul 2025371 AMAQI
29th Jul 2025392 AMAQI
29th Jul 2025373 AMAQI
29th Jul 2025304 AMAQI

18°C13/23°C

29th Jul 2025265 AMAQI
29th Jul 2025296 AMAQI
29th Jul 2025337 AMAQI
29th Jul 2025328 AMAQI
29th Jul 2025349 AMAQI
29th Jul 20253510 AMAQI
29th Jul 20252911 AMAQI
29th Jul 20252912 PMAQI
29th Jul 2025271 PMAQI
29th Jul 2025252 PMAQI
29th Jul 2025243 PMAQI
29th Jul 2025264 PMAQI
29th Jul 2025255 PMAQI
29th Jul 2025276 PMAQI
29th Jul 2025277 PMAQI
29th Jul 2025298 PMAQI
29th Jul 2025349 PMAQI
29th Jul 20253310 PMAQI
29th Jul 20253411 PMAQI
30th Jul 20253412 AMAQI
30th Jul 2025371 AMAQI
30th Jul 2025382 AMAQI
30th Jul 2025413 AMAQI
30th Jul 2025444 AMAQI

17°C13/21°C

30th Jul 2025385 AMAQI
30th Jul 2025426 AMAQI
30th Jul 2025407 AMAQI
30th Jul 2025448 AMAQI
30th Jul 2025419 AMAQI
30th Jul 20254110 AMAQI
30th Jul 20253411 AMAQI
30th Jul 20252912 PMAQI
30th Jul 2025281 PMAQI
30th Jul 2025282 PMAQI
30th Jul 2025263 PMAQI
30th Jul 2025264 PMAQI
30th Jul 2025255 PMAQI
30th Jul 2025296 PMAQI
30th Jul 2025357 PMAQI
30th Jul 2025388 PMAQI
30th Jul 2025389 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253811 PMAQI
31st Jul 20253812 AMAQI
31st Jul 2025381 AMAQI
31st Jul 2025382 AMAQI
31st Jul 2025333 AMAQI
31st Jul 2025344 AMAQI

19°C14/24°C

31st Jul 2025285 AMAQI
31st Jul 2025266 AMAQI
31st Jul 2025287 AMAQI
31st Jul 2025268 AMAQI
31st Jul 2025309 AMAQI
31st Jul 20253110 AMAQI
31st Jul 20253411 AMAQI
31st Jul 20253112 PMAQI
31st Jul 2025221 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025243 PMAQI
31st Jul 2025244 PMAQI
31st Jul 2025235 PMAQI
31st Jul 2025246 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025248 PMAQI
31st Jul 2025249 PMAQI
31st Jul 20252410 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252312 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025222 AMAQI
1st Aug 2025203 AMAQI
1st Aug 2025214 AMAQI

18°C14/23°C

1st Aug 2025205 AMAQI
1st Aug 2025266 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025308 AMAQI
1st Aug 2025239 AMAQI
1st Aug 20252210 AMAQI
1st Aug 20252211 AMAQI
1st Aug 20252312 PMAQI
1st Aug 2025241 PMAQI
1st Aug 2025222 PMAQI
1st Aug 2025253 PMAQI
1st Aug 2025204 PMAQI
1st Aug 2025185 PMAQI
1st Aug 2025216 PMAQI
1st Aug 2025237 PMAQI
1st Aug 2025238 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252210 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252212 AMAQI
2nd Aug 2025211 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025233 AMAQI
2nd Aug 2025224 AMAQI

16°C11/22°C

2nd Aug 2025195 AMAQI
5 AM
2nd Aug 2025216 AMAQI
2nd Aug 2025177 AMAQI
2nd Aug 2025198 AMAQI
2nd Aug 2025209 AMAQI
2nd Aug 20251910 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025221 PMAQI
1 PM
2nd Aug 2025212 PMAQI
9 PM
1 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 12 PM

28AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
1 PM - 9 PM

25AQI

9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 12 PM (Avg. 28), while the lowest AQI was between 1 PM to 9 PM (Avg. 25).
Night time
Avg. Highest Time
12 AM - 11 PM

29AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
12 AM - 11 PM

29AQI

7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 29), while the lowest AQI was between 12 AM to 11 PM (Avg. 29).

2025 Days Vs Air Quality

Horley, Surrey, United Kingdom

2025

69%

146

31%

66

0.4%

1

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

Good
146 Days
Moderate
66 Days
Poor
1 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 69%

Health Risk Level:

Moderate

In 2025, 69% of 214 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights

Horley, Surrey, 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
31AQI
2nd January 2025
31AQI
3rd January 2025
47AQI
4th January 2025
58AQI
5th January 2025
33AQI
6th January 2025
24AQI
7th January 2025
23AQI
8th January 2025
44AQI
9th January 2025
49AQI
10th January 2025
59AQI
11th January 2025
89AQI
12th January 2025
85AQI
13th January 2025
63AQI
14th January 2025
61AQI
15th January 2025
62AQI
16th January 2025
58AQI
17th January 2025
58AQI
18th January 2025
71AQI
19th January 2025
69AQI
20th January 2025
62AQI
21st January 2025
70AQI
22nd January 2025
76AQI
23rd January 2025
58AQI
24th January 2025
41AQI
25th January 2025
40AQI
26th January 2025
41AQI
27th January 2025
32AQI
28th January 2025
32AQI
29th January 2025
31AQI
30th January 2025
38AQI
31st January 2025
39AQI
1st February 2025
42AQI
2nd February 2025
60AQI
3rd February 2025
72AQI
4th February 2025
43AQI
5th February 2025
45AQI
6th February 2025
56AQI
7th February 2025
44AQI
8th February 2025
72AQI
9th February 2025
54AQI
10th February 2025
94AQI
11th February 2025
82AQI
12th February 2025
72AQI
13th February 2025
73AQI
14th February 2025
65AQI
15th February 2025
100AQI
16th February 2025
72AQI
17th February 2025
69AQI
18th February 2025
75AQI
19th February 2025
82AQI
20th February 2025
61AQI
21st February 2025
39AQI
22nd February 2025
50AQI
23rd February 2025
44AQI
24th February 2025
29AQI
25th February 2025
39AQI
26th February 2025
34AQI
27th February 2025
30AQI
28th February 2025
50AQI
1st March 2025
52AQI
2nd March 2025
61AQI
3rd March 2025
76AQI
4th March 2025
78AQI
5th March 2025
96AQI
6th March 2025
86AQI
7th March 2025
54AQI
8th March 2025
56AQI
9th March 2025
85AQI
10th March 2025
133AQI
11th March 2025
87AQI
12th March 2025
39AQI
13th March 2025
34AQI
14th March 2025
43AQI
15th March 2025
32AQI
16th March 2025
33AQI
17th March 2025
31AQI
18th March 2025
49AQI
19th March 2025
65AQI
20th March 2025
56AQI
21st March 2025
61AQI
22nd March 2025
48AQI
23rd March 2025
52AQI
24th March 2025
86AQI
25th March 2025
94AQI
26th March 2025
58AQI
27th March 2025
51AQI
28th March 2025
39AQI
29th March 2025
35AQI
30th March 2025
39AQI
31st March 2025
39AQI
1st April 2025
39AQI
2nd April 2025
46AQI
3rd April 2025
58AQI
4th April 2025
74AQI
5th April 2025
52AQI
6th April 2025
36AQI
7th April 2025
35AQI
8th April 2025
51AQI
9th April 2025
50AQI
10th April 2025
40AQI
11th April 2025
58AQI
12th April 2025
69AQI
13th April 2025
50AQI
14th April 2025
30AQI
15th April 2025
48AQI
16th April 2025
26AQI
17th April 2025
32AQI
18th April 2025
39AQI
19th April 2025
46AQI
20th April 2025
34AQI
21st April 2025
55AQI
22nd April 2025
29AQI
23rd April 2025
25AQI
24th April 2025
46AQI
25th April 2025
52AQI
26th April 2025
58AQI
27th April 2025
70AQI
28th April 2025
56AQI
29th April 2025
57AQI
30th April 2025
58AQI
1st May 2025
68AQI
2nd May 2025
56AQI
3rd May 2025
51AQI
4th May 2025
25AQI
5th May 2025
26AQI
6th May 2025
23AQI
7th May 2025
26AQI
8th May 2025
28AQI
9th May 2025
37AQI
10th May 2025
35AQI
11th May 2025
37AQI
12th May 2025
32AQI
13th May 2025
41AQI
14th May 2025
37AQI
15th May 2025
38AQI
16th May 2025
43AQI
17th May 2025
36AQI
18th May 2025
46AQI
19th May 2025
41AQI
20th May 2025
33AQI
21st May 2025
38AQI
22nd May 2025
36AQI
23rd May 2025
32AQI
24th May 2025
33AQI
25th May 2025
21AQI
26th May 2025
25AQI
27th May 2025
24AQI
28th May 2025
22AQI
29th May 2025
25AQI
30th May 2025
26AQI
31st May 2025
28AQI
1st June 2025
28AQI
2nd June 2025
24AQI
3rd June 2025
29AQI
4th June 2025
22AQI
5th June 2025
22AQI
6th June 2025
19AQI
7th June 2025
18AQI
8th June 2025
22AQI
9th June 2025
51AQI
10th June 2025
49AQI
11th June 2025
42AQI
12th June 2025
48AQI
13th June 2025
41AQI
14th June 2025
42AQI
15th June 2025
33AQI
16th June 2025
30AQI
17th June 2025
30AQI
18th June 2025
35AQI
19th June 2025
44AQI
20th June 2025
46AQI
21st June 2025
43AQI
22nd June 2025
38AQI
23rd June 2025
29AQI
24th June 2025
28AQI
25th June 2025
24AQI
26th June 2025
24AQI
27th June 2025
26AQI
28th June 2025
20AQI
29th June 2025
23AQI
30th June 2025
32AQI
1st July 2025
40AQI
2nd July 2025
39AQI
3rd July 2025
23AQI
4th July 2025
23AQI
5th July 2025
23AQI
6th July 2025
21AQI
7th July 2025
24AQI
8th July 2025
26AQI
9th July 2025
28AQI
10th July 2025
28AQI
11th July 2025
32AQI
12th July 2025
30AQI
13th July 2025
32AQI
14th July 2025
34AQI
15th July 2025
25AQI
16th July 2025
24AQI
17th July 2025
24AQI
18th July 2025
27AQI
19th July 2025
31AQI
20th July 2025
26AQI
21st July 2025
20AQI
22nd July 2025
18AQI
23rd July 2025
23AQI
24th July 2025
41AQI
25th July 2025
40AQI
26th July 2025
41AQI
27th July 2025
27AQI
28th July 2025
29AQI
29th July 2025
31AQI
30th July 2025
35AQI
31st July 2025
30AQI
1st August 2025
23AQI

51AQI

59AQI

60AQI

47AQI

34AQI

32AQI

29AQI

23AQI

No. of days

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

202544AQI

16
15
12
16
12
18
1
17
13
28
3
29
1
31
1
146
66
1

Highest AQI recorded in

March

60AQI

Lowest AQI recorded in

August

23AQI

202434AQI

12
5
1
1
12
30
31
29
2
3
13
19
11
28
3
178
22

Highest AQI recorded in

March

57AQI

Lowest AQI recorded in

April

21AQI

202334AQI

1
6
20
5
31
4
1
30
1
86
13

Highest AQI recorded in

February

71AQI

Lowest AQI recorded in

October

26AQI

202231AQI

2
29
1
5
9
36
10

Highest AQI recorded in

December

55AQI

Lowest AQI recorded in

October

11AQI

Most & Least Polluted Years Over the Last 4 Years

Most Polluted Year Recorded
2025(Avg.)
44AQI
Least Polluted Year Recorded
2022(Avg.)
31AQI

Horley's annual 2025 AQI (44) shows an average percentage change of 34.9% (worsened AQI) compared to previous years: 2022 (31), 2023 (34), 2024 (34).