Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Caerdydd, Cardiff, 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

Caerdydd, Cardiff, United Kingdom

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
13th Aug 2025
57AQI
Lowest AQI recorded on
8th Aug 2023
15AQI

Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 28 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: 20th Aug - 21st Aug 2025

Caerdydd, Cardiff, United Kingdom

AQI
Day
Night
.

5 AM20th Aug 2025

8 PM

4 AM21st Aug 2025

Day time
Avg. Highest Time
8AM20th Aug

33AQI

Avg. Lowest Time
7AM20th Aug

22AQI

Night time
Avg. Highest Time
9PM20th Aug

30AQI

Avg. Lowest Time
3AM21st Aug

24AQI

In the last 24 hours,

Caerdydd's AQI reached its highest point of 33 at 8 AM during the Day, while the lowest point, 22, was recorded at 7 AM during the Day between 20th Aug and 21st Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Caerdydd, Cardiff, United Kingdom

JulAug
22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st
Day
Night
22nd Jul 2025355 AMAQI
22nd Jul 2025296 AMAQI
22nd Jul 2025207 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025179 AMAQI
22nd Jul 20252710 AMAQI
22nd Jul 20251211 AMAQI
22nd Jul 20252012 PMAQI
22nd Jul 2025271 PMAQI
22nd Jul 2025312 PMAQI
22nd Jul 2025283 PMAQI
22nd Jul 2025284 PMAQI
22nd Jul 2025305 PMAQI
22nd Jul 2025336 PMAQI
22nd Jul 2025287 PMAQI
22nd Jul 2025268 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252312 AMAQI
23rd Jul 2025181 AMAQI
23rd Jul 2025182 AMAQI
23rd Jul 2025193 AMAQI
23rd Jul 2025164 AMAQI

17°C14/21°C

23rd Jul 2025165 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025197 AMAQI
23rd Jul 2025168 AMAQI
23rd Jul 2025249 AMAQI
23rd Jul 20253110 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20252512 PMAQI
23rd Jul 2025231 PMAQI
23rd Jul 2025212 PMAQI
23rd Jul 2025243 PMAQI
23rd Jul 2025344 PMAQI
23rd Jul 2025395 PMAQI
23rd Jul 2025566 PMAQI
23rd Jul 2025587 PMAQI
23rd Jul 2025428 PMAQI
23rd Jul 2025269 PMAQI
23rd Jul 20252610 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025281 AMAQI
24th Jul 2025442 AMAQI
24th Jul 2025473 AMAQI
24th Jul 2025544 AMAQI

17°C14/22°C

24th Jul 2025585 AMAQI
24th Jul 2025576 AMAQI
24th Jul 2025567 AMAQI
24th Jul 2025548 AMAQI
24th Jul 2025569 AMAQI
24th Jul 20256410 AMAQI
24th Jul 20255211 AMAQI
24th Jul 20255612 PMAQI
24th Jul 2025511 PMAQI
24th Jul 2025522 PMAQI
24th Jul 2025533 PMAQI
24th Jul 2025524 PMAQI
24th Jul 2025535 PMAQI
24th Jul 2025546 PMAQI
24th Jul 2025537 PMAQI
24th Jul 2025538 PMAQI
24th Jul 2025529 PMAQI
24th Jul 20255210 PMAQI
24th Jul 20255311 PMAQI
25th Jul 20255312 AMAQI
25th Jul 2025531 AMAQI
25th Jul 2025622 AMAQI
25th Jul 2025633 AMAQI
25th Jul 2025654 AMAQI

18°C13/21°C

25th Jul 2025765 AMAQI
25th Jul 2025676 AMAQI
25th Jul 2025717 AMAQI
25th Jul 2025738 AMAQI
25th Jul 2025679 AMAQI
25th Jul 20256510 AMAQI
25th Jul 20256311 AMAQI
25th Jul 20256112 PMAQI
25th Jul 2025621 PMAQI
25th Jul 2025622 PMAQI
25th Jul 2025623 PMAQI
25th Jul 2025604 PMAQI
25th Jul 2025605 PMAQI
25th Jul 2025586 PMAQI
25th Jul 2025577 PMAQI
25th Jul 2025598 PMAQI
25th Jul 2025609 PMAQI
25th Jul 20256310 PMAQI
25th Jul 20256011 PMAQI
26th Jul 20255912 AMAQI
26th Jul 2025521 AMAQI
26th Jul 2025262 AMAQI
26th Jul 2025233 AMAQI
26th Jul 2025244 AMAQI

18°C14/22°C

26th Jul 2025245 AMAQI
26th Jul 2025326 AMAQI
26th Jul 2025227 AMAQI
26th Jul 2025198 AMAQI
26th Jul 2025219 AMAQI
26th Jul 20252110 AMAQI
26th Jul 20252511 AMAQI
26th Jul 20252612 PMAQI
26th Jul 2025301 PMAQI
26th Jul 2025322 PMAQI
26th Jul 2025303 PMAQI
26th Jul 2025274 PMAQI
26th Jul 2025285 PMAQI
26th Jul 2025346 PMAQI
26th Jul 2025317 PMAQI
26th Jul 2025298 PMAQI
26th Jul 2025329 PMAQI
26th Jul 20253210 PMAQI
26th Jul 20253011 PMAQI
27th Jul 20253212 AMAQI
27th Jul 2025311 AMAQI
27th Jul 2025252 AMAQI
27th Jul 2025203 AMAQI
27th Jul 2025274 AMAQI

18°C14/22°C

27th Jul 2025265 AMAQI
27th Jul 2025286 AMAQI
27th Jul 2025257 AMAQI
27th Jul 2025258 AMAQI
27th Jul 2025259 AMAQI
27th Jul 20253310 AMAQI
27th Jul 20253111 AMAQI
27th Jul 20252712 PMAQI
27th Jul 2025271 PMAQI
27th Jul 2025382 PMAQI
27th Jul 2025323 PMAQI
27th Jul 2025344 PMAQI
27th Jul 2025335 PMAQI
27th Jul 2025346 PMAQI
27th Jul 2025307 PMAQI
27th Jul 2025298 PMAQI
27th Jul 2025279 PMAQI
27th Jul 20252810 PMAQI
27th Jul 20252811 PMAQI
28th Jul 20252812 AMAQI
28th Jul 2025301 AMAQI
28th Jul 2025292 AMAQI
28th Jul 2025283 AMAQI
28th Jul 2025304 AMAQI

16°C12/19°C

28th Jul 2025285 AMAQI
28th Jul 2025306 AMAQI
28th Jul 2025307 AMAQI
28th Jul 2025368 AMAQI
28th Jul 2025379 AMAQI
28th Jul 20253410 AMAQI
28th Jul 20253411 AMAQI
28th Jul 20252912 PMAQI
28th Jul 2025311 PMAQI
28th Jul 2025382 PMAQI
28th Jul 2025353 PMAQI
28th Jul 2025344 PMAQI
28th Jul 2025335 PMAQI
28th Jul 2025336 PMAQI
28th Jul 2025297 PMAQI
28th Jul 2025268 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20253010 PMAQI
28th Jul 20252911 PMAQI
29th Jul 20253112 AMAQI
29th Jul 2025291 AMAQI
29th Jul 2025222 AMAQI
29th Jul 2025253 AMAQI
29th Jul 2025274 AMAQI

17°C12/21°C

29th Jul 2025245 AMAQI
29th Jul 2025296 AMAQI
29th Jul 2025257 AMAQI
29th Jul 2025278 AMAQI
29th Jul 2025279 AMAQI
29th Jul 20252610 AMAQI
29th Jul 20252011 AMAQI
29th Jul 20251612 PMAQI
29th Jul 2025231 PMAQI
29th Jul 2025252 PMAQI
29th Jul 2025243 PMAQI
29th Jul 2025244 PMAQI
29th Jul 2025255 PMAQI
29th Jul 2025296 PMAQI
29th Jul 2025267 PMAQI
29th Jul 2025248 PMAQI
29th Jul 2025259 PMAQI
29th Jul 20252410 PMAQI
29th Jul 20252511 PMAQI
30th Jul 20252512 AMAQI
30th Jul 2025311 AMAQI
30th Jul 2025252 AMAQI
30th Jul 2025183 AMAQI
30th Jul 2025174 AMAQI

17°C13/22°C

30th Jul 2025295 AMAQI
30th Jul 2025226 AMAQI
30th Jul 2025267 AMAQI
30th Jul 2025228 AMAQI
30th Jul 2025289 AMAQI
30th Jul 20253410 AMAQI
30th Jul 20253511 AMAQI
30th Jul 20252712 PMAQI
30th Jul 2025251 PMAQI
30th Jul 2025312 PMAQI
30th Jul 2025283 PMAQI
30th Jul 2025254 PMAQI
30th Jul 2025285 PMAQI
30th Jul 2025266 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025468 PMAQI
30th Jul 2025509 PMAQI
30th Jul 20255010 PMAQI
30th Jul 20255011 PMAQI
31st Jul 20255012 AMAQI
31st Jul 2025501 AMAQI
31st Jul 2025502 AMAQI
31st Jul 2025373 AMAQI
31st Jul 2025324 AMAQI

18°C14/22°C

31st Jul 2025285 AMAQI
31st Jul 2025246 AMAQI
31st Jul 2025197 AMAQI
31st Jul 2025298 AMAQI
31st Jul 2025209 AMAQI
31st Jul 20251510 AMAQI
31st Jul 20251411 AMAQI
31st Jul 20251612 PMAQI
31st Jul 2025211 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025213 PMAQI
31st Jul 2025204 PMAQI
31st Jul 2025205 PMAQI
31st Jul 2025206 PMAQI
31st Jul 2025227 PMAQI
31st Jul 2025248 PMAQI
31st Jul 2025249 PMAQI
31st Jul 20252310 PMAQI
31st Jul 20252211 PMAQI
1st Aug 20252212 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025232 AMAQI
1st Aug 2025223 AMAQI
1st Aug 2025204 AMAQI

19°C14/23°C

1st Aug 2025215 AMAQI
1st Aug 2025206 AMAQI
1st Aug 2025207 AMAQI
1st Aug 2025208 AMAQI
1st Aug 2025219 AMAQI
1st Aug 20252110 AMAQI
1st Aug 20252011 AMAQI
1st Aug 20252412 PMAQI
1st Aug 2025231 PMAQI
1st Aug 2025252 PMAQI
1st Aug 2025243 PMAQI
1st Aug 2025244 PMAQI
1st Aug 2025225 PMAQI
1st Aug 2025236 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025238 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252210 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252212 AMAQI
2nd Aug 2025221 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025213 AMAQI
2nd Aug 2025204 AMAQI

16°C11/20°C

2nd Aug 2025195 AMAQI
2nd Aug 2025196 AMAQI
2nd Aug 2025197 AMAQI
2nd Aug 2025198 AMAQI
2nd Aug 2025209 AMAQI
2nd Aug 20252010 AMAQI
2nd Aug 20252011 AMAQI
2nd Aug 20252212 PMAQI
2nd Aug 2025211 PMAQI
2nd Aug 2025202 PMAQI
2nd Aug 2025223 PMAQI
2nd Aug 2025224 PMAQI
2nd Aug 2025215 PMAQI
2nd Aug 2025226 PMAQI
2nd Aug 2025267 PMAQI
2nd Aug 2025248 PMAQI
2nd Aug 2025229 PMAQI
2nd Aug 20252210 PMAQI
2nd Aug 20252211 PMAQI
3rd Aug 20252112 AMAQI
3rd Aug 2025241 AMAQI
3rd Aug 2025262 AMAQI
3rd Aug 2025263 AMAQI
3rd Aug 2025294 AMAQI

16°C11/20°C

3rd Aug 2025285 AMAQI
3rd Aug 2025326 AMAQI
3rd Aug 2025237 AMAQI
3rd Aug 2025228 AMAQI
3rd Aug 2025229 AMAQI
3rd Aug 20252210 AMAQI
3rd Aug 20252211 AMAQI
3rd Aug 20252312 PMAQI
3rd Aug 2025221 PMAQI
3rd Aug 2025252 PMAQI
3rd Aug 2025223 PMAQI
3rd Aug 2025244 PMAQI
3rd Aug 2025255 PMAQI
3rd Aug 2025256 PMAQI
3rd Aug 2025257 PMAQI
3rd Aug 2025288 PMAQI
3rd Aug 2025269 PMAQI
3rd Aug 20252410 PMAQI
3rd Aug 20252511 PMAQI
4th Aug 20252512 AMAQI
4th Aug 2025251 AMAQI
4th Aug 2025222 AMAQI
4th Aug 2025243 AMAQI
4th Aug 2025244 AMAQI

18°C13/22°C

4th Aug 2025245 AMAQI
4th Aug 2025256 AMAQI
4th Aug 2025237 AMAQI
4th Aug 2025238 AMAQI
4th Aug 2025249 AMAQI
4th Aug 20252510 AMAQI
4th Aug 20252211 AMAQI
4th Aug 20252412 PMAQI
4th Aug 2025221 PMAQI
4th Aug 2025222 PMAQI
4th Aug 2025253 PMAQI
4th Aug 2025264 PMAQI
4th Aug 2025235 PMAQI
4th Aug 2025246 PMAQI
4th Aug 2025267 PMAQI
4th Aug 2025238 PMAQI
4th Aug 2025249 PMAQI
4th Aug 20252410 PMAQI
4th Aug 20252411 PMAQI
5th Aug 20252412 AMAQI
5th Aug 2025251 AMAQI
5th Aug 2025242 AMAQI
5th Aug 2025223 AMAQI
5th Aug 2025214 AMAQI

18°C13/21°C

5th Aug 2025225 AMAQI
5th Aug 2025236 AMAQI
5th Aug 2025277 AMAQI
5th Aug 2025308 AMAQI
5th Aug 2025329 AMAQI
5th Aug 20252810 AMAQI
5th Aug 20252811 AMAQI
5th Aug 20252912 PMAQI
5th Aug 2025371 PMAQI
5th Aug 2025242 PMAQI
5th Aug 2025243 PMAQI
5th Aug 2025244 PMAQI
5th Aug 2025245 PMAQI
5th Aug 2025236 PMAQI
5th Aug 2025257 PMAQI
5th Aug 2025248 PMAQI
5th Aug 2025249 PMAQI
5th Aug 20252510 PMAQI
5th Aug 20252611 PMAQI
6th Aug 20252512 AMAQI
6th Aug 2025261 AMAQI
6th Aug 2025292 AMAQI
6th Aug 2025333 AMAQI
6th Aug 2025314 AMAQI

16°C12/20°C

6th Aug 2025285 AMAQI
6th Aug 2025306 AMAQI
6th Aug 2025307 AMAQI
6th Aug 2025308 AMAQI
6th Aug 2025329 AMAQI
6th Aug 20253210 AMAQI
6th Aug 20253211 AMAQI
6th Aug 20253212 PMAQI
6th Aug 2025311 PMAQI
6th Aug 2025282 PMAQI
6th Aug 2025283 PMAQI
6th Aug 2025304 PMAQI
6th Aug 2025305 PMAQI
6th Aug 2025326 PMAQI
6th Aug 2025317 PMAQI
6th Aug 2025288 PMAQI
6th Aug 2025299 PMAQI
6th Aug 20252910 PMAQI
6th Aug 20252911 PMAQI
7th Aug 20252912 AMAQI
7th Aug 2025301 AMAQI
7th Aug 2025302 AMAQI
7th Aug 2025313 AMAQI
7th Aug 2025314 AMAQI

16°C13/20°C

7th Aug 2025315 AMAQI
7th Aug 2025286 AMAQI
7th Aug 2025297 AMAQI
7th Aug 2025298 AMAQI
7th Aug 2025289 AMAQI
7th Aug 20252610 AMAQI
7th Aug 20252711 AMAQI
7th Aug 20252912 PMAQI
7th Aug 2025291 PMAQI
7th Aug 2025282 PMAQI
7th Aug 2025273 PMAQI
7th Aug 2025274 PMAQI
7th Aug 2025285 PMAQI
7th Aug 2025296 PMAQI
7th Aug 2025277 PMAQI
7th Aug 2025278 PMAQI
7th Aug 2025289 PMAQI
7th Aug 20252810 PMAQI
7th Aug 20252911 PMAQI
8th Aug 20252812 AMAQI
8th Aug 2025301 AMAQI
8th Aug 2025302 AMAQI
8th Aug 2025283 AMAQI
8th Aug 2025304 AMAQI

17°C14/19°C

8th Aug 2025295 AMAQI
8th Aug 2025256 AMAQI
8th Aug 2025267 AMAQI
8th Aug 2025258 AMAQI
8th Aug 2025199 AMAQI
8th Aug 20252010 AMAQI
8th Aug 20251911 AMAQI
8th Aug 20252112 PMAQI
8th Aug 2025271 PMAQI
8th Aug 2025202 PMAQI
8th Aug 2025243 PMAQI
8th Aug 2025244 PMAQI
8th Aug 2025235 PMAQI
8th Aug 2025296 PMAQI
8th Aug 2025227 PMAQI
8th Aug 2025238 PMAQI
8th Aug 2025249 PMAQI
8th Aug 20252410 PMAQI
8th Aug 20252511 PMAQI
9th Aug 20252612 AMAQI
9th Aug 2025301 AMAQI
9th Aug 2025242 AMAQI
9th Aug 2025203 AMAQI
9th Aug 2025204 AMAQI

17°C14/20°C

9th Aug 2025185 AMAQI
9th Aug 2025206 AMAQI
9th Aug 2025207 AMAQI
9th Aug 2025188 AMAQI
9th Aug 2025199 AMAQI
9th Aug 20251810 AMAQI
9th Aug 20251711 AMAQI
9th Aug 20252112 PMAQI
9th Aug 2025231 PMAQI
9th Aug 2025242 PMAQI
9th Aug 2025253 PMAQI
9th Aug 2025264 PMAQI
9th Aug 2025245 PMAQI
9th Aug 2025226 PMAQI
9th Aug 2025257 PMAQI
9th Aug 2025248 PMAQI
9th Aug 2025229 PMAQI
9th Aug 20252310 PMAQI
9th Aug 20252311 PMAQI
10th Aug 20252312 AMAQI
10th Aug 2025241 AMAQI
10th Aug 2025242 AMAQI
10th Aug 2025433 AMAQI
10th Aug 2025364 AMAQI

18°C14/20°C

10th Aug 2025415 AMAQI
10th Aug 2025396 AMAQI
10th Aug 2025337 AMAQI
10th Aug 2025328 AMAQI
10th Aug 2025309 AMAQI
10th Aug 20253510 AMAQI
10th Aug 20254611 AMAQI
10th Aug 20254612 PMAQI
10th Aug 2025471 PMAQI
10th Aug 2025492 PMAQI
10th Aug 2025483 PMAQI
10th Aug 2025484 PMAQI
10th Aug 2025535 PMAQI
10th Aug 2025576 PMAQI
10th Aug 2025457 PMAQI
10th Aug 2025408 PMAQI
10th Aug 2025379 PMAQI
10th Aug 20253810 PMAQI
10th Aug 20253811 PMAQI
11th Aug 20253912 AMAQI
11th Aug 2025481 AMAQI
11th Aug 2025482 AMAQI
11th Aug 2025563 AMAQI
11th Aug 2025404 AMAQI

18°C13/23°C

11th Aug 2025505 AMAQI
11th Aug 2025446 AMAQI
11th Aug 2025547 AMAQI
11th Aug 2025538 AMAQI
11th Aug 2025539 AMAQI
11th Aug 20255010 AMAQI
11th Aug 20255511 AMAQI
11th Aug 20255312 PMAQI
11th Aug 2025521 PMAQI
11th Aug 2025512 PMAQI
11th Aug 2025513 PMAQI
11th Aug 2025504 PMAQI
11th Aug 2025505 PMAQI
11th Aug 2025476 PMAQI
11th Aug 2025497 PMAQI
11th Aug 2025518 PMAQI
11th Aug 2025519 PMAQI
11th Aug 20255210 PMAQI
11th Aug 20255211 PMAQI
12th Aug 20255212 AMAQI
12th Aug 2025511 AMAQI
12th Aug 2025532 AMAQI
12th Aug 2025563 AMAQI
12th Aug 2025534 AMAQI

21°C15/26°C

12th Aug 2025545 AMAQI
12th Aug 2025536 AMAQI
12th Aug 2025527 AMAQI
12th Aug 2025558 AMAQI
12th Aug 2025579 AMAQI
12th Aug 20255410 AMAQI
12th Aug 20255811 AMAQI
12th Aug 20255412 PMAQI
12th Aug 2025541 PMAQI
12th Aug 2025522 PMAQI
12th Aug 2025523 PMAQI
12th Aug 2025534 PMAQI
12th Aug 2025535 PMAQI
12th Aug 2025506 PMAQI
12th Aug 2025527 PMAQI
12th Aug 2025538 PMAQI
12th Aug 2025529 PMAQI
12th Aug 20255310 PMAQI
12th Aug 20255411 PMAQI
13th Aug 20255212 AMAQI
13th Aug 2025561 AMAQI
13th Aug 2025602 AMAQI
13th Aug 2025603 AMAQI
13th Aug 2025604 AMAQI

22°C16/30°C

13th Aug 2025615 AMAQI
13th Aug 2025606 AMAQI
13th Aug 2025587 AMAQI
13th Aug 2025598 AMAQI
13th Aug 2025609 AMAQI
13th Aug 20255910 AMAQI
13th Aug 20255811 AMAQI
13th Aug 20255812 PMAQI
13th Aug 2025571 PMAQI
13th Aug 2025572 PMAQI
13th Aug 2025553 PMAQI
13th Aug 2025554 PMAQI
13th Aug 2025555 PMAQI
13th Aug 2025556 PMAQI
13th Aug 2025547 PMAQI
13th Aug 2025558 PMAQI
13th Aug 2025569 PMAQI
13th Aug 20255610 PMAQI
13th Aug 20255611 PMAQI
14th Aug 20255712 AMAQI
14th Aug 2025541 AMAQI
14th Aug 2025552 AMAQI
14th Aug 2025513 AMAQI
14th Aug 2025524 AMAQI

20°C16/26°C

14th Aug 2025535 AMAQI
14th Aug 2025496 AMAQI
14th Aug 2025497 AMAQI
14th Aug 2025528 AMAQI
14th Aug 2025459 AMAQI
14th Aug 20254410 AMAQI
14th Aug 20254411 AMAQI
14th Aug 20254212 PMAQI
14th Aug 2025431 PMAQI
14th Aug 2025442 PMAQI
14th Aug 2025463 PMAQI
14th Aug 2025444 PMAQI
14th Aug 2025455 PMAQI
14th Aug 2025406 PMAQI
14th Aug 2025447 PMAQI
14th Aug 2025488 PMAQI
14th Aug 2025449 PMAQI
14th Aug 20254810 PMAQI
14th Aug 20254911 PMAQI
15th Aug 20254912 AMAQI
15th Aug 2025471 AMAQI
15th Aug 2025292 AMAQI
15th Aug 2025303 AMAQI
15th Aug 2025374 AMAQI

18°C16/22°C

15th Aug 2025345 AMAQI
15th Aug 2025316 AMAQI
15th Aug 2025287 AMAQI
15th Aug 2025338 AMAQI
15th Aug 2025309 AMAQI
15th Aug 20253410 AMAQI
15th Aug 20253211 AMAQI
15th Aug 20253112 PMAQI
15th Aug 2025301 PMAQI
15th Aug 2025322 PMAQI
15th Aug 2025333 PMAQI
15th Aug 2025334 PMAQI
15th Aug 2025355 PMAQI
15th Aug 2025346 PMAQI
15th Aug 2025347 PMAQI
15th Aug 2025358 PMAQI
15th Aug 2025349 PMAQI
15th Aug 20253510 PMAQI
15th Aug 20253611 PMAQI
16th Aug 20253612 AMAQI
16th Aug 2025321 AMAQI
16th Aug 2025312 AMAQI
16th Aug 2025383 AMAQI
16th Aug 2025364 AMAQI

20°C15/26°C

16th Aug 2025435 AMAQI
16th Aug 2025426 AMAQI
16th Aug 2025367 AMAQI
16th Aug 2025488 AMAQI
16th Aug 2025389 AMAQI
16th Aug 20254610 AMAQI
16th Aug 20254511 AMAQI
16th Aug 20254212 PMAQI
16th Aug 2025451 PMAQI
16th Aug 2025432 PMAQI
16th Aug 2025423 PMAQI
16th Aug 2025464 PMAQI
16th Aug 2025435 PMAQI
16th Aug 2025426 PMAQI
16th Aug 2025427 PMAQI
16th Aug 2025418 PMAQI
16th Aug 2025409 PMAQI
16th Aug 20254110 PMAQI
16th Aug 20254011 PMAQI
17th Aug 20254012 AMAQI
17th Aug 2025371 AMAQI
17th Aug 2025342 AMAQI
17th Aug 2025323 AMAQI
17th Aug 2025334 AMAQI

21°C16/26°C

17th Aug 2025385 AMAQI
17th Aug 2025386 AMAQI
17th Aug 2025387 AMAQI
17th Aug 2025338 AMAQI
17th Aug 2025369 AMAQI
17th Aug 20253410 AMAQI
17th Aug 20253811 AMAQI
17th Aug 20253512 PMAQI
17th Aug 2025381 PMAQI
17th Aug 2025392 PMAQI
17th Aug 2025353 PMAQI
17th Aug 2025384 PMAQI
17th Aug 2025385 PMAQI
17th Aug 2025376 PMAQI
17th Aug 2025387 PMAQI
17th Aug 2025368 PMAQI
17th Aug 2025379 PMAQI
17th Aug 20253410 PMAQI
17th Aug 20253711 PMAQI
18th Aug 20253612 AMAQI
18th Aug 2025331 AMAQI
18th Aug 2025292 AMAQI
18th Aug 2025293 AMAQI
18th Aug 2025264 AMAQI

19°C12/27°C

18th Aug 2025335 AMAQI
18th Aug 2025296 AMAQI
18th Aug 2025317 AMAQI
18th Aug 2025328 AMAQI
18th Aug 2025359 AMAQI
18th Aug 20253410 AMAQI
18th Aug 20253611 AMAQI
18th Aug 20253412 PMAQI
18th Aug 2025321 PMAQI
18th Aug 2025362 PMAQI
18th Aug 2025323 PMAQI
18th Aug 2025344 PMAQI
18th Aug 2025325 PMAQI
18th Aug 2025326 PMAQI
18th Aug 2025317 PMAQI
18th Aug 2025308 PMAQI
18th Aug 2025309 PMAQI
18th Aug 20253310 PMAQI
18th Aug 20253311 PMAQI
19th Aug 20253212 AMAQI
19th Aug 2025371 AMAQI
19th Aug 2025312 AMAQI
19th Aug 2025303 AMAQI
19th Aug 2025324 AMAQI

20°C15/25°C

19th Aug 2025285 AMAQI
19th Aug 2025336 AMAQI
19th Aug 2025277 AMAQI
19th Aug 2025308 AMAQI
19th Aug 2025349 AMAQI
19th Aug 20253510 AMAQI
19th Aug 20253611 AMAQI
19th Aug 20253412 PMAQI
19th Aug 2025311 PMAQI
19th Aug 2025342 PMAQI
19th Aug 2025343 PMAQI
19th Aug 2025354 PMAQI
19th Aug 2025335 PMAQI
19th Aug 2025346 PMAQI
19th Aug 2025377 PMAQI
19th Aug 2025328 PMAQI
19th Aug 2025319 PMAQI
19th Aug 20253110 PMAQI
19th Aug 20253111 PMAQI
20th Aug 20253112 AMAQI
20th Aug 2025311 AMAQI
20th Aug 2025282 AMAQI
20th Aug 2025263 AMAQI
20th Aug 2025284 AMAQI

19°C15/24°C

20th Aug 2025295 AMAQI
20th Aug 2025286 AMAQI
20th Aug 2025227 AMAQI
20th Aug 2025338 AMAQI
20th Aug 2025329 AMAQI
20th Aug 20253110 AMAQI
20th Aug 20252611 AMAQI
20th Aug 20253112 PMAQI
20th Aug 2025281 PMAQI
20th Aug 2025252 PMAQI
20th Aug 2025303 PMAQI
20th Aug 2025284 PMAQI
20th Aug 2025305 PMAQI
20th Aug 2025306 PMAQI
20th Aug 2025327 PMAQI
20th Aug 2025298 PMAQI
20th Aug 2025309 PMAQI
20th Aug 20253010 PMAQI
20th Aug 20252911 PMAQI
21st Aug 20253012 AMAQI
21st Aug 2025291 AMAQI
21st Aug 2025262 AMAQI
21st Aug 2025243 AMAQI
21st Aug 2025264 AMAQI

18°C14/23°C

21st Aug 2025265 AMAQI
5 AM
21st Aug 2025296 AMAQI
21st Aug 2025247 AMAQI
21st Aug 2025278 AMAQI
21st Aug 2025339 AMAQI
21st Aug 20253210 AMAQI
21st Aug 20253011 AMAQI
21st Aug 20253312 PMAQI
12 PM
8 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 PM

34AQI

16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM

34AQI

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. 34), while the lowest AQI was between 5 AM to 8 PM (Avg. 34).
Night time
Avg. Highest Time
12 AM - 1 AM

34AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
2 AM - 11 PM

33AQI

6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 34), while the lowest AQI was between 2 AM to 11 PM (Avg. 33).

2025 Days Vs Air Quality

Caerdydd, Cardiff, United Kingdom

2025

84%

196

16%

36

Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)

Good
196 Days
Moderate
36 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 84%

Health Risk Level:

Low

In 2025, 84% of 233 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

Caerdydd, Cardiff, 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
34AQI
2nd January 2025
43AQI
3rd January 2025
51AQI
4th January 2025
52AQI
5th January 2025
27AQI
6th January 2025
27AQI
7th January 2025
29AQI
8th January 2025
44AQI
9th January 2025
47AQI
10th January 2025
51AQI
11th January 2025
69AQI
12th January 2025
70AQI
13th January 2025
40AQI
14th January 2025
44AQI
15th January 2025
44AQI
16th January 2025
60AQI
17th January 2025
54AQI
18th January 2025
58AQI
19th January 2025
67AQI
20th January 2025
64AQI
21st January 2025
63AQI
22nd January 2025
63AQI
23rd January 2025
51AQI
24th January 2025
51AQI
25th January 2025
51AQI
26th January 2025
49AQI
27th January 2025
47AQI
28th January 2025
30AQI
29th January 2025
31AQI
30th January 2025
32AQI
31st January 2025
37AQI
1st February 2025
46AQI
2nd February 2025
31AQI
3rd February 2025
41AQI
4th February 2025
32AQI
5th February 2025
39AQI
6th February 2025
48AQI
7th February 2025
37AQI
8th February 2025
56AQI
9th February 2025
73AQI
10th February 2025
65AQI
11th February 2025
63AQI
12th February 2025
65AQI
13th February 2025
68AQI
14th February 2025
67AQI
15th February 2025
73AQI
16th February 2025
73AQI
17th February 2025
71AQI
18th February 2025
76AQI
19th February 2025
80AQI
20th February 2025
33AQI
21st February 2025
37AQI
22nd February 2025
45AQI
23rd February 2025
36AQI
24th February 2025
33AQI
25th February 2025
33AQI
26th February 2025
26AQI
27th February 2025
28AQI
28th February 2025
43AQI
1st March 2025
43AQI
2nd March 2025
47AQI
3rd March 2025
39AQI
4th March 2025
40AQI
5th March 2025
48AQI
6th March 2025
49AQI
7th March 2025
38AQI
8th March 2025
38AQI
9th March 2025
53AQI
10th March 2025
67AQI
11th March 2025
42AQI
12th March 2025
27AQI
13th March 2025
24AQI
14th March 2025
28AQI
15th March 2025
25AQI
16th March 2025
25AQI
17th March 2025
21AQI
18th March 2025
32AQI
19th March 2025
45AQI
20th March 2025
42AQI
21st March 2025
40AQI
22nd March 2025
32AQI
23rd March 2025
36AQI
24th March 2025
52AQI
25th March 2025
32AQI
26th March 2025
26AQI
27th March 2025
22AQI
28th March 2025
19AQI
29th March 2025
21AQI
30th March 2025
24AQI
31st March 2025
28AQI
1st April 2025
28AQI
2nd April 2025
28AQI
3rd April 2025
32AQI
4th April 2025
41AQI
5th April 2025
30AQI
6th April 2025
20AQI
7th April 2025
23AQI
8th April 2025
30AQI
9th April 2025
32AQI
10th April 2025
31AQI
11th April 2025
38AQI
12th April 2025
35AQI
13th April 2025
24AQI
14th April 2025
17AQI
15th April 2025
20AQI
16th April 2025
17AQI
17th April 2025
21AQI
18th April 2025
20AQI
19th April 2025
23AQI
20th April 2025
23AQI
21st April 2025
22AQI
22nd April 2025
17AQI
23rd April 2025
18AQI
24th April 2025
27AQI
25th April 2025
31AQI
26th April 2025
29AQI
27th April 2025
21AQI
28th April 2025
21AQI
29th April 2025
29AQI
30th April 2025
34AQI
1st May 2025
39AQI
2nd May 2025
32AQI
3rd May 2025
25AQI
4th May 2025
20AQI
5th May 2025
19AQI
6th May 2025
21AQI
7th May 2025
32AQI
8th May 2025
25AQI
9th May 2025
32AQI
10th May 2025
37AQI
11th May 2025
36AQI
12th May 2025
36AQI
13th May 2025
34AQI
14th May 2025
38AQI
15th May 2025
37AQI
16th May 2025
36AQI
17th May 2025
39AQI
18th May 2025
43AQI
19th May 2025
39AQI
20th May 2025
36AQI
21st May 2025
32AQI
22nd May 2025
34AQI
23rd May 2025
36AQI
24th May 2025
28AQI
25th May 2025
24AQI
26th May 2025
25AQI
27th May 2025
23AQI
28th May 2025
25AQI
29th May 2025
21AQI
30th May 2025
22AQI
31st May 2025
24AQI
1st June 2025
29AQI
2nd June 2025
25AQI
3rd June 2025
26AQI
4th June 2025
25AQI
5th June 2025
19AQI
6th June 2025
20AQI
7th June 2025
17AQI
8th June 2025
22AQI
9th June 2025
57AQI
10th June 2025
32AQI
11th June 2025
32AQI
12th June 2025
41AQI
13th June 2025
37AQI
14th June 2025
27AQI
15th June 2025
31AQI
16th June 2025
29AQI
17th June 2025
28AQI
18th June 2025
33AQI
19th June 2025
42AQI
20th June 2025
51AQI
21st June 2025
44AQI
22nd June 2025
44AQI
23rd June 2025
22AQI
24th June 2025
22AQI
25th June 2025
16AQI
26th June 2025
18AQI
27th June 2025
20AQI
28th June 2025
18AQI
29th June 2025
22AQI
30th June 2025
27AQI
1st July 2025
27AQI
2nd July 2025
20AQI
3rd July 2025
20AQI
4th July 2025
25AQI
5th July 2025
23AQI
6th July 2025
21AQI
7th July 2025
23AQI
8th July 2025
25AQI
9th July 2025
26AQI
10th July 2025
28AQI
11th July 2025
33AQI
12th July 2025
41AQI
13th July 2025
38AQI
14th July 2025
43AQI
15th July 2025
38AQI
16th July 2025
36AQI
17th July 2025
31AQI
18th July 2025
32AQI
19th July 2025
33AQI
20th July 2025
29AQI
21st July 2025
29AQI
22nd July 2025
25AQI
23rd July 2025
28AQI
24th July 2025
51AQI
25th July 2025
62AQI
26th July 2025
30AQI
27th July 2025
29AQI
28th July 2025
31AQI
29th July 2025
25AQI
30th July 2025
31AQI
31st July 2025
26AQI
1st August 2025
22AQI
2nd August 2025
21AQI
3rd August 2025
25AQI
4th August 2025
24AQI
5th August 2025
25AQI
6th August 2025
30AQI
7th August 2025
29AQI
8th August 2025
25AQI
9th August 2025
22AQI
10th August 2025
40AQI
11th August 2025
50AQI
12th August 2025
53AQI
13th August 2025
57AQI
14th August 2025
48AQI
15th August 2025
34AQI
16th August 2025
40AQI
17th August 2025
36AQI
18th August 2025
32AQI
19th August 2025
32AQI
20th August 2025
28AQI

48AQI

51AQI

36AQI

26AQI

31AQI

29AQI

31AQI

34AQI

No. of days

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

202536AQI

16
15
16
12
28
3
30
31
28
2
29
2
18
2
196
36

Highest AQI recorded in

February

51AQI

Lowest AQI recorded in

April

26AQI

202436AQI

26
5
24
5
26
5
30
26
5
28
2
31
30
1
25
5
31
20
9
1
31
328
37
1

Highest AQI recorded in

November

46AQI

Lowest AQI recorded in

July

26AQI

202343AQI

23
8
21
7
26
5
16
14
20
11
11
19
27
4
27
4
18
11
24
7
24
5
28
3
265
98

Highest AQI recorded in

June

54AQI

Lowest AQI recorded in

August

33AQI

202246AQI

23
8
16
6
14
16
1
20
10
28
3
25
5
22
2
2
26
2
25
6
18
12
15
16
234
86
1

Highest AQI recorded in

March

57AQI

Lowest AQI recorded in

September

37AQI

202136AQI

25
5
23
5
23
7
1
20
10
28
3
27
3
26
5
31
26
4
29
2
27
3
28
3
313
50
1

Highest AQI recorded in

March

47AQI

Lowest AQI recorded in

October

29AQI

202032AQI

8
5
14
7
18
29
1
31
25
6
29
1
31
22
8
29
2
236
30

Highest AQI recorded in

April

49AQI

Lowest AQI recorded in

July

19AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2022(Avg.)
46AQI
Least Polluted Year Recorded
2020(Avg.)
32AQI

Caerdydd's annual 2025 AQI (36) shows an average percentage change of -5.7% (improved AQI) compared to previous years: 2020 (32), 2021 (36), 2022 (46), 2023 (43), 2024 (36).