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+

July Air Quality Analysis

Caerdydd, Cardiff, United Kingdom

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
24th Jul 2026
85AQI
Lowest AQI recorded on
24th Jul 2022
10AQI

Same Day Analysis (31st July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 27 of Good air quality, showing improvement over 2024 and 2023 on the same day.

Day & Night AQI Trend: 30th Jul - 31st Jul 2026

Caerdydd, Cardiff, United Kingdom

AQI
Day
Night
.

5 AM30th Jul 2026

9 PM

4 AM31st Jul 2026

Day time
Avg. Highest Time
9AM30th Jul

35AQI

Avg. Lowest Time
5AM30th Jul

21AQI

Night time
Avg. Highest Time
3AM31st Jul

32AQI

Avg. Lowest Time
11PM30th Jul

23AQI

In the last 24 hours,

Caerdydd's AQI reached its highest point of 35 at 9 AM during the Day, while the lowest point, 21, was recorded at 5 AM during the Day between 30th Jul and 31st Jul 2026.

Day & Night AQI Trend : Jul 2026

Caerdydd, Cardiff, United Kingdom

Jul
02nd - 03rd03rd - 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
Day
Night
2nd Jul 2026205 AMAQI
2nd Jul 2026176 AMAQI
2nd Jul 2026227 AMAQI
2nd Jul 2026128 AMAQI
2nd Jul 2026239 AMAQI
2nd Jul 20262010 AMAQI
2nd Jul 20261711 AMAQI
2nd Jul 20261312 PMAQI
2nd Jul 2026181 PMAQI
2nd Jul 2026232 PMAQI
2nd Jul 2026233 PMAQI
2nd Jul 2026244 PMAQI
2nd Jul 2026225 PMAQI
2nd Jul 2026106 PMAQI
2nd Jul 2026167 PMAQI
2nd Jul 2026168 PMAQI
2nd Jul 2026209 PMAQI
2nd Jul 20262210 PMAQI
2nd Jul 20262411 PMAQI
3rd Jul 20262412 AMAQI
3rd Jul 2026211 AMAQI
3rd Jul 2026212 AMAQI
3rd Jul 2026203 AMAQI
3rd Jul 2026214 AMAQI

17°C12/21°C

3rd Jul 2026245 AMAQI
3rd Jul 2026266 AMAQI
3rd Jul 2026267 AMAQI
3rd Jul 2026238 AMAQI
3rd Jul 2026259 AMAQI
3rd Jul 20262410 AMAQI
3rd Jul 20262511 AMAQI
3rd Jul 20262512 PMAQI
3rd Jul 2026251 PMAQI
3rd Jul 2026252 PMAQI
3rd Jul 2026263 PMAQI
3rd Jul 2026274 PMAQI
3rd Jul 2026275 PMAQI
3rd Jul 2026266 PMAQI
3rd Jul 2026257 PMAQI
3rd Jul 2026228 PMAQI
3rd Jul 2026239 PMAQI
3rd Jul 20262410 PMAQI
3rd Jul 20262411 PMAQI
4th Jul 20262412 AMAQI
4th Jul 2026211 AMAQI
4th Jul 2026192 AMAQI
4th Jul 2026193 AMAQI
4th Jul 2026234 AMAQI

16°C12/20°C

4th Jul 2026225 AMAQI
4th Jul 2026206 AMAQI
4th Jul 2026167 AMAQI
4th Jul 202678 AMAQI
4th Jul 2026169 AMAQI
4th Jul 20262310 AMAQI
4th Jul 20262411 AMAQI
4th Jul 20262212 PMAQI
4th Jul 2026231 PMAQI
4th Jul 2026232 PMAQI
4th Jul 2026243 PMAQI
4th Jul 2026224 PMAQI
4th Jul 2026245 PMAQI
4th Jul 2026206 PMAQI
4th Jul 2026217 PMAQI
4th Jul 2026208 PMAQI
4th Jul 2026169 PMAQI
4th Jul 20262110 PMAQI
4th Jul 20262011 PMAQI
5th Jul 20262012 AMAQI
5th Jul 2026141 AMAQI
5th Jul 202682 AMAQI
5th Jul 202683 AMAQI
5th Jul 2026114 AMAQI

17°C13/21°C

5th Jul 2026105 AMAQI
5th Jul 2026106 AMAQI
5th Jul 2026117 AMAQI
5th Jul 2026198 AMAQI
5th Jul 2026169 AMAQI
5th Jul 20262110 AMAQI
5th Jul 20262111 AMAQI
5th Jul 20262012 PMAQI
5th Jul 2026201 PMAQI
5th Jul 2026192 PMAQI
5th Jul 2026193 PMAQI
5th Jul 2026244 PMAQI
5th Jul 2026275 PMAQI
5th Jul 2026256 PMAQI
5th Jul 2026207 PMAQI
5th Jul 2026218 PMAQI
5th Jul 2026259 PMAQI
5th Jul 20262410 PMAQI
5th Jul 20262011 PMAQI
6th Jul 20262212 AMAQI
6th Jul 2026181 AMAQI
6th Jul 2026202 AMAQI
6th Jul 2026183 AMAQI
6th Jul 2026174 AMAQI

18°C14/22°C

6th Jul 202685 AMAQI
6th Jul 2026156 AMAQI
6th Jul 2026217 AMAQI
6th Jul 2026218 AMAQI
6th Jul 2026189 AMAQI
6th Jul 20261810 AMAQI
6th Jul 20262011 AMAQI
6th Jul 20262312 PMAQI
6th Jul 2026131 PMAQI
6th Jul 202682 PMAQI
6th Jul 2026113 PMAQI
6th Jul 2026114 PMAQI
6th Jul 202685 PMAQI
6th Jul 202686 PMAQI
6th Jul 202677 PMAQI
6th Jul 202688 PMAQI
6th Jul 202689 PMAQI
6th Jul 20261610 PMAQI
6th Jul 20262111 PMAQI
7th Jul 20261812 AMAQI
7th Jul 2026151 AMAQI
7th Jul 202682 AMAQI
7th Jul 2026153 AMAQI
7th Jul 2026204 AMAQI

18°C14/23°C

7th Jul 2026145 AMAQI
7th Jul 2026166 AMAQI
7th Jul 2026287 AMAQI
7th Jul 2026258 AMAQI
7th Jul 2026179 AMAQI
7th Jul 20262210 AMAQI
7th Jul 20262011 AMAQI
7th Jul 20261712 PMAQI
7th Jul 2026241 PMAQI
7th Jul 2026242 PMAQI
7th Jul 2026243 PMAQI
7th Jul 2026294 PMAQI
7th Jul 2026295 PMAQI
7th Jul 2026266 PMAQI
7th Jul 2026277 PMAQI
7th Jul 2026258 PMAQI
7th Jul 2026279 PMAQI
7th Jul 20262610 PMAQI
7th Jul 20262611 PMAQI
8th Jul 20262712 AMAQI
8th Jul 2026241 AMAQI
8th Jul 2026242 AMAQI
8th Jul 2026233 AMAQI
8th Jul 2026224 AMAQI

18°C13/23°C

8th Jul 2026235 AMAQI
8th Jul 2026226 AMAQI
8th Jul 2026267 AMAQI
8th Jul 2026278 AMAQI
8th Jul 2026249 AMAQI
8th Jul 20262410 AMAQI
8th Jul 20262211 AMAQI
8th Jul 20266312 PMAQI
8th Jul 2026621 PMAQI
8th Jul 2026592 PMAQI
8th Jul 2026563 PMAQI
8th Jul 2026554 PMAQI
8th Jul 2026605 PMAQI
8th Jul 2026586 PMAQI
8th Jul 2026537 PMAQI
8th Jul 2026508 PMAQI
8th Jul 2026439 PMAQI
8th Jul 20264510 PMAQI
8th Jul 20263911 PMAQI
9th Jul 20263412 AMAQI
9th Jul 2026311 AMAQI
9th Jul 2026302 AMAQI
9th Jul 2026313 AMAQI
9th Jul 2026314 AMAQI

20°C15/25°C

9th Jul 2026245 AMAQI
9th Jul 2026226 AMAQI
9th Jul 2026207 AMAQI
9th Jul 2026248 AMAQI
9th Jul 2026269 AMAQI
9th Jul 20263010 AMAQI
9th Jul 20263511 AMAQI
9th Jul 20263712 PMAQI
9th Jul 2026461 PMAQI
9th Jul 2026562 PMAQI
9th Jul 2026573 PMAQI
9th Jul 2026474 PMAQI
9th Jul 2026345 PMAQI
9th Jul 2026256 PMAQI
9th Jul 2026247 PMAQI
9th Jul 2026238 PMAQI
9th Jul 2026229 PMAQI
9th Jul 20262210 PMAQI
9th Jul 20262511 PMAQI
10th Jul 20262812 AMAQI
10th Jul 2026261 AMAQI
10th Jul 2026262 AMAQI
10th Jul 2026263 AMAQI
10th Jul 2026304 AMAQI

20°C14/26°C

10th Jul 2026275 AMAQI
10th Jul 2026236 AMAQI
10th Jul 2026237 AMAQI
10th Jul 2026228 AMAQI
10th Jul 2026239 AMAQI
10th Jul 20263310 AMAQI
10th Jul 20263911 AMAQI
10th Jul 20264712 PMAQI
10th Jul 2026541 PMAQI
10th Jul 2026552 PMAQI
10th Jul 2026463 PMAQI
10th Jul 2026454 PMAQI
10th Jul 2026485 PMAQI
10th Jul 2026516 PMAQI
10th Jul 2026457 PMAQI
10th Jul 2026418 PMAQI
10th Jul 2026409 PMAQI
10th Jul 20263510 PMAQI
10th Jul 20263411 PMAQI
11th Jul 20263312 AMAQI
11th Jul 2026321 AMAQI
11th Jul 2026332 AMAQI
11th Jul 2026273 AMAQI
11th Jul 2026284 AMAQI

23°C16/30°C

11th Jul 2026245 AMAQI
11th Jul 2026236 AMAQI
11th Jul 2026237 AMAQI
11th Jul 2026248 AMAQI
11th Jul 2026289 AMAQI
11th Jul 20262610 AMAQI
11th Jul 20262711 AMAQI
11th Jul 20262612 PMAQI
11th Jul 2026271 PMAQI
11th Jul 2026292 PMAQI
11th Jul 2026313 PMAQI
11th Jul 2026304 PMAQI
11th Jul 2026295 PMAQI
11th Jul 2026296 PMAQI
11th Jul 2026307 PMAQI
11th Jul 2026288 PMAQI
11th Jul 2026309 PMAQI
11th Jul 20262810 PMAQI
11th Jul 20262811 PMAQI
12th Jul 20262812 AMAQI
12th Jul 2026281 AMAQI
12th Jul 2026282 AMAQI
12th Jul 2026243 AMAQI
12th Jul 2026244 AMAQI

23°C17/28°C

12th Jul 2026215 AMAQI
12th Jul 2026206 AMAQI
12th Jul 2026207 AMAQI
12th Jul 2026248 AMAQI
12th Jul 2026269 AMAQI
12th Jul 20262610 AMAQI
12th Jul 20262711 AMAQI
12th Jul 20262612 PMAQI
12th Jul 2026281 PMAQI
12th Jul 2026292 PMAQI
12th Jul 2026273 PMAQI
12th Jul 2026304 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026276 PMAQI
12th Jul 2026277 PMAQI
12th Jul 2026288 PMAQI
12th Jul 2026279 PMAQI
12th Jul 20262810 PMAQI
12th Jul 20263011 PMAQI
13th Jul 20263112 AMAQI
13th Jul 2026291 AMAQI
13th Jul 2026302 AMAQI
13th Jul 2026233 AMAQI
13th Jul 2026224 AMAQI

22°C15/29°C

13th Jul 2026225 AMAQI
13th Jul 2026226 AMAQI
13th Jul 2026207 AMAQI
13th Jul 2026248 AMAQI
13th Jul 2026279 AMAQI
13th Jul 20262910 AMAQI
13th Jul 20262811 AMAQI
13th Jul 20262912 PMAQI
13th Jul 2026321 PMAQI
13th Jul 2026302 PMAQI
13th Jul 2026313 PMAQI
13th Jul 2026324 PMAQI
13th Jul 2026315 PMAQI
13th Jul 2026306 PMAQI
13th Jul 2026297 PMAQI
13th Jul 2026278 PMAQI
13th Jul 2026319 PMAQI
13th Jul 20264410 PMAQI
13th Jul 20265411 PMAQI
14th Jul 20265012 AMAQI
14th Jul 2026501 AMAQI
14th Jul 2026502 AMAQI
14th Jul 2026483 AMAQI
14th Jul 2026374 AMAQI

19°C14/25°C

14th Jul 2026225 AMAQI
14th Jul 2026206 AMAQI
14th Jul 2026237 AMAQI
14th Jul 2026238 AMAQI
14th Jul 2026239 AMAQI
14th Jul 20262510 AMAQI
14th Jul 20262511 AMAQI
14th Jul 20262412 PMAQI
14th Jul 2026261 PMAQI
14th Jul 2026262 PMAQI
14th Jul 2026293 PMAQI
14th Jul 2026294 PMAQI
14th Jul 2026305 PMAQI
14th Jul 2026326 PMAQI
14th Jul 2026367 PMAQI
14th Jul 2026288 PMAQI
14th Jul 2026289 PMAQI
14th Jul 20262810 PMAQI
14th Jul 20263211 PMAQI
15th Jul 20263112 AMAQI
15th Jul 2026311 AMAQI
15th Jul 2026322 AMAQI
15th Jul 2026313 AMAQI
15th Jul 2026304 AMAQI

20°C14/27°C

15th Jul 2026245 AMAQI
15th Jul 2026216 AMAQI
15th Jul 2026197 AMAQI
15th Jul 2026218 AMAQI
15th Jul 2026269 AMAQI
15th Jul 20262810 AMAQI
15th Jul 20262811 AMAQI
15th Jul 20262812 PMAQI
15th Jul 2026321 PMAQI
15th Jul 2026312 PMAQI
15th Jul 2026293 PMAQI
15th Jul 2026304 PMAQI
15th Jul 2026265 PMAQI
15th Jul 2026256 PMAQI
15th Jul 2026287 PMAQI
15th Jul 2026258 PMAQI
15th Jul 2026269 PMAQI
15th Jul 20262910 PMAQI
15th Jul 20262811 PMAQI
16th Jul 20263012 AMAQI
16th Jul 2026301 AMAQI
16th Jul 2026292 AMAQI
16th Jul 2026283 AMAQI
16th Jul 2026294 AMAQI

21°C16/27°C

16th Jul 2026245 AMAQI
16th Jul 2026246 AMAQI
16th Jul 2026247 AMAQI
16th Jul 2026238 AMAQI
16th Jul 2026249 AMAQI
16th Jul 20262710 AMAQI
16th Jul 20262911 AMAQI
16th Jul 20262812 PMAQI
16th Jul 2026301 PMAQI
16th Jul 2026272 PMAQI
16th Jul 2026283 PMAQI
16th Jul 2026304 PMAQI
16th Jul 2026295 PMAQI
16th Jul 2026286 PMAQI
16th Jul 2026287 PMAQI
16th Jul 2026278 PMAQI
16th Jul 2026279 PMAQI
16th Jul 20262810 PMAQI
16th Jul 20262711 PMAQI
17th Jul 20262512 AMAQI
17th Jul 2026271 AMAQI
17th Jul 2026272 AMAQI
17th Jul 2026263 AMAQI
17th Jul 2026244 AMAQI

21°C14/27°C

17th Jul 2026245 AMAQI
17th Jul 2026236 AMAQI
17th Jul 2026227 AMAQI
17th Jul 2026438 AMAQI
17th Jul 2026389 AMAQI
17th Jul 20264310 AMAQI
17th Jul 20264111 AMAQI
17th Jul 20264012 PMAQI
17th Jul 2026391 PMAQI
17th Jul 2026402 PMAQI
17th Jul 2026393 PMAQI
17th Jul 2026434 PMAQI
17th Jul 2026435 PMAQI
17th Jul 2026436 PMAQI
17th Jul 2026427 PMAQI
17th Jul 2026548 PMAQI
17th Jul 2026529 PMAQI
17th Jul 20265310 PMAQI
17th Jul 20265411 PMAQI
18th Jul 20265712 AMAQI
18th Jul 2026601 AMAQI
18th Jul 2026572 AMAQI
18th Jul 2026593 AMAQI
18th Jul 2026564 AMAQI

21°C15/27°C

18th Jul 2026535 AMAQI
18th Jul 2026486 AMAQI
18th Jul 2026507 AMAQI
18th Jul 2026498 AMAQI
18th Jul 2026569 AMAQI
18th Jul 20265310 AMAQI
18th Jul 20265411 AMAQI
18th Jul 20265212 PMAQI
18th Jul 2026511 PMAQI
18th Jul 2026522 PMAQI
18th Jul 2026543 PMAQI
18th Jul 2026544 PMAQI
18th Jul 2026545 PMAQI
18th Jul 2026566 PMAQI
18th Jul 2026557 PMAQI
18th Jul 2026548 PMAQI
18th Jul 2026549 PMAQI
18th Jul 20265410 PMAQI
18th Jul 20265511 PMAQI
19th Jul 20265412 AMAQI
19th Jul 2026531 AMAQI
19th Jul 2026522 AMAQI
19th Jul 2026523 AMAQI
19th Jul 2026524 AMAQI

19°C13/24°C

19th Jul 2026505 AMAQI
19th Jul 2026426 AMAQI
19th Jul 2026437 AMAQI
19th Jul 2026438 AMAQI
19th Jul 2026399 AMAQI
19th Jul 20262410 AMAQI
19th Jul 20262311 AMAQI
19th Jul 20262212 PMAQI
19th Jul 2026211 PMAQI
19th Jul 2026222 PMAQI
19th Jul 2026233 PMAQI
19th Jul 2026224 PMAQI
19th Jul 2026245 PMAQI
19th Jul 2026256 PMAQI
19th Jul 2026327 PMAQI
19th Jul 2026298 PMAQI
19th Jul 2026319 PMAQI
19th Jul 20263510 PMAQI
19th Jul 20263411 PMAQI
20th Jul 20263112 AMAQI
20th Jul 2026361 AMAQI
20th Jul 2026362 AMAQI
20th Jul 2026283 AMAQI
20th Jul 2026284 AMAQI

18°C12/23°C

20th Jul 2026265 AMAQI
20th Jul 2026226 AMAQI
20th Jul 2026217 AMAQI
20th Jul 2026228 AMAQI
20th Jul 2026209 AMAQI
20th Jul 20262110 AMAQI
20th Jul 20262511 AMAQI
20th Jul 20262312 PMAQI
20th Jul 2026241 PMAQI
20th Jul 2026322 PMAQI
20th Jul 2026273 PMAQI
20th Jul 2026224 PMAQI
20th Jul 2026215 PMAQI
20th Jul 2026236 PMAQI
20th Jul 2026267 PMAQI
20th Jul 2026258 PMAQI
20th Jul 2026259 PMAQI
20th Jul 20262410 PMAQI
20th Jul 20262311 PMAQI
21st Jul 20262312 AMAQI
21st Jul 2026231 AMAQI
21st Jul 2026242 AMAQI
21st Jul 2026293 AMAQI

18°C12/23°C

21st Jul 2026265 AMAQI
21st Jul 2026316 AMAQI
21st Jul 2026397 AMAQI
21st Jul 2026438 AMAQI
21st Jul 2026349 AMAQI
21st Jul 20263610 AMAQI
21st Jul 20263311 AMAQI
21st Jul 20263912 PMAQI
21st Jul 2026291 PMAQI
21st Jul 2026282 PMAQI
21st Jul 2026273 PMAQI
21st Jul 2026284 PMAQI
21st Jul 2026385 PMAQI
21st Jul 2026366 PMAQI
21st Jul 2026377 PMAQI
21st Jul 2026438 PMAQI
21st Jul 2026309 PMAQI
21st Jul 20262710 PMAQI
21st Jul 20263011 PMAQI
22nd Jul 20262912 AMAQI
22nd Jul 2026291 AMAQI
22nd Jul 2026322 AMAQI
22nd Jul 2026373 AMAQI
22nd Jul 2026364 AMAQI

19°C12/25°C

22nd Jul 2026285 AMAQI
22nd Jul 2026296 AMAQI
22nd Jul 2026287 AMAQI
22nd Jul 2026398 AMAQI
22nd Jul 2026509 AMAQI
22nd Jul 20264610 AMAQI
22nd Jul 20264511 AMAQI
22nd Jul 20265912 PMAQI
22nd Jul 2026741 PMAQI
22nd Jul 2026902 PMAQI
22nd Jul 2026933 PMAQI
22nd Jul 2026944 PMAQI
22nd Jul 2026945 PMAQI
22nd Jul 2026966 PMAQI
22nd Jul 2026887 PMAQI
22nd Jul 2026808 PMAQI
22nd Jul 2026779 PMAQI
22nd Jul 20267410 PMAQI
22nd Jul 20265011 PMAQI
23rd Jul 20263912 AMAQI
23rd Jul 2026611 AMAQI
23rd Jul 2026732 AMAQI
23rd Jul 2026693 AMAQI
23rd Jul 2026734 AMAQI

18°C13/23°C

23rd Jul 2026785 AMAQI
23rd Jul 2026756 AMAQI
23rd Jul 2026797 AMAQI
23rd Jul 2026698 AMAQI
23rd Jul 2026809 AMAQI
23rd Jul 20269010 AMAQI
23rd Jul 20269711 AMAQI
23rd Jul 20269512 PMAQI
23rd Jul 2026931 PMAQI
23rd Jul 2026942 PMAQI
23rd Jul 2026903 PMAQI
23rd Jul 2026954 PMAQI
23rd Jul 2026945 PMAQI
23rd Jul 2026986 PMAQI
23rd Jul 2026967 PMAQI
23rd Jul 2026938 PMAQI
23rd Jul 2026929 PMAQI
23rd Jul 20268910 PMAQI
23rd Jul 20269611 PMAQI
24th Jul 20269412 AMAQI
24th Jul 2026931 AMAQI
24th Jul 2026982 AMAQI
24th Jul 2026963 AMAQI
24th Jul 2026924 AMAQI

20°C14/24°C

24th Jul 2026925 AMAQI
24th Jul 2026896 AMAQI
24th Jul 2026937 AMAQI
24th Jul 2026928 AMAQI
24th Jul 2026959 AMAQI
24th Jul 20269510 AMAQI
24th Jul 20269611 AMAQI
24th Jul 20269712 PMAQI
24th Jul 2026891 PMAQI
24th Jul 2026792 PMAQI
24th Jul 2026763 PMAQI
24th Jul 2026764 PMAQI
24th Jul 2026795 PMAQI
24th Jul 2026766 PMAQI
24th Jul 2026787 PMAQI
24th Jul 2026698 PMAQI
24th Jul 2026599 PMAQI
24th Jul 20266310 PMAQI
24th Jul 20266211 PMAQI
25th Jul 20266112 AMAQI
25th Jul 2026621 AMAQI
25th Jul 2026612 AMAQI
25th Jul 2026583 AMAQI
25th Jul 2026584 AMAQI

19°C13/24°C

25th Jul 2026585 AMAQI
25th Jul 2026626 AMAQI
25th Jul 2026647 AMAQI
25th Jul 2026628 AMAQI
25th Jul 2026649 AMAQI
25th Jul 20266410 AMAQI
25th Jul 20266611 AMAQI
25th Jul 20266112 PMAQI
25th Jul 2026631 PMAQI
25th Jul 2026592 PMAQI
25th Jul 2026613 PMAQI
25th Jul 2026614 PMAQI
25th Jul 2026605 PMAQI
25th Jul 2026636 PMAQI
25th Jul 2026627 PMAQI
25th Jul 2026598 PMAQI
25th Jul 2026609 PMAQI
25th Jul 20266110 PMAQI
25th Jul 20266111 PMAQI
26th Jul 20265912 AMAQI
26th Jul 2026611 AMAQI
26th Jul 2026592 AMAQI
26th Jul 2026603 AMAQI
26th Jul 2026614 AMAQI

18°C13/23°C

26th Jul 2026755 AMAQI
26th Jul 2026906 AMAQI
26th Jul 2026947 AMAQI
26th Jul 2026748 AMAQI
26th Jul 2026579 AMAQI
26th Jul 20265910 AMAQI
26th Jul 20266011 AMAQI
26th Jul 20265712 PMAQI
26th Jul 2026911 PMAQI
26th Jul 2026892 PMAQI
26th Jul 2026903 PMAQI
26th Jul 2026894 PMAQI
26th Jul 2026915 PMAQI
26th Jul 2026916 PMAQI
26th Jul 2026857 PMAQI
26th Jul 2026878 PMAQI
26th Jul 2026889 PMAQI
26th Jul 20268610 PMAQI
26th Jul 20268911 PMAQI
27th Jul 20268412 AMAQI
27th Jul 2026901 AMAQI
27th Jul 2026922 AMAQI
27th Jul 2026933 AMAQI
27th Jul 2026894 AMAQI

19°C15/23°C

27th Jul 2026915 AMAQI
27th Jul 2026926 AMAQI
27th Jul 2026927 AMAQI
27th Jul 2026908 AMAQI
27th Jul 2026899 AMAQI
27th Jul 20269010 AMAQI
27th Jul 20268911 AMAQI
27th Jul 20268912 PMAQI
27th Jul 2026901 PMAQI
27th Jul 2026902 PMAQI
27th Jul 2026913 PMAQI
27th Jul 2026894 PMAQI
27th Jul 2026835 PMAQI
27th Jul 2026696 PMAQI
27th Jul 2026577 PMAQI
27th Jul 2026538 PMAQI
27th Jul 2026459 PMAQI
27th Jul 20263310 PMAQI
27th Jul 20263211 PMAQI
28th Jul 20262412 AMAQI
28th Jul 2026171 AMAQI
28th Jul 2026172 AMAQI
28th Jul 2026323 AMAQI
28th Jul 2026344 AMAQI

17°C12/22°C

28th Jul 2026225 AMAQI
28th Jul 2026196 AMAQI
28th Jul 2026187 AMAQI
28th Jul 2026178 AMAQI
28th Jul 2026189 AMAQI
28th Jul 20262010 AMAQI
28th Jul 20261711 AMAQI
28th Jul 20261412 PMAQI
28th Jul 2026191 PMAQI
28th Jul 2026212 PMAQI
28th Jul 2026263 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026195 PMAQI
28th Jul 2026196 PMAQI
28th Jul 2026167 PMAQI
28th Jul 2026158 PMAQI
28th Jul 2026209 PMAQI
28th Jul 20263510 PMAQI
28th Jul 20262811 PMAQI
29th Jul 20262612 AMAQI
29th Jul 2026281 AMAQI
29th Jul 2026292 AMAQI
29th Jul 2026293 AMAQI
29th Jul 2026214 AMAQI

20°C16/25°C

29th Jul 2026165 AMAQI
29th Jul 2026176 AMAQI
29th Jul 2026207 AMAQI
29th Jul 2026168 AMAQI
29th Jul 2026139 AMAQI
29th Jul 20261610 AMAQI
29th Jul 20262311 AMAQI
29th Jul 20262112 PMAQI
29th Jul 2026231 PMAQI
29th Jul 2026292 PMAQI
29th Jul 2026333 PMAQI
29th Jul 2026254 PMAQI
29th Jul 2026275 PMAQI
29th Jul 2026306 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026238 PMAQI
29th Jul 2026239 PMAQI
29th Jul 20262510 PMAQI
29th Jul 20262411 PMAQI
30th Jul 20262612 AMAQI
30th Jul 2026261 AMAQI
30th Jul 2026242 AMAQI
30th Jul 2026333 AMAQI
30th Jul 2026274 AMAQI

19°C15/24°C

30th Jul 2026215 AMAQI
30th Jul 2026276 AMAQI
30th Jul 2026327 AMAQI
30th Jul 2026238 AMAQI
30th Jul 2026359 AMAQI
30th Jul 20263310 AMAQI
30th Jul 20262611 AMAQI
30th Jul 20262612 PMAQI
30th Jul 2026241 PMAQI
30th Jul 2026272 PMAQI
30th Jul 2026283 PMAQI
30th Jul 2026224 PMAQI
30th Jul 2026295 PMAQI
30th Jul 2026276 PMAQI
30th Jul 2026267 PMAQI
30th Jul 2026308 PMAQI
30th Jul 2026349 PMAQI
30th Jul 20262710 PMAQI
30th Jul 20262311 PMAQI
31st Jul 20262412 AMAQI
31st Jul 2026291 AMAQI
31st Jul 2026302 AMAQI
31st Jul 2026323 AMAQI
31st Jul 2026244 AMAQI

18°C13/23°C

31st Jul 2026255 AMAQI
5 AM
31st Jul 2026266 AMAQI
31st Jul 2026317 AMAQI
31st Jul 2026348 AMAQI
31st Jul 2026269 AMAQI
31st Jul 20262510 AMAQI
31st Jul 20262911 AMAQI
31st Jul 20263112 PMAQI
31st Jul 2026311 PMAQI
1 PM
31st Jul 2026332 PMAQI
31st Jul 2026253 PMAQI
31st Jul 2026214 PMAQI
31st Jul 2026255 PMAQI
31st Jul 2026296 PMAQI
31st Jul 2026297 PMAQI
31st Jul 2026258 PMAQI
31st Jul 2026219 PMAQI
9 PM
31st Jul 20262610 PMAQI
31st Jul 20262111 PMAQI
1 AM
4 AM

16°C11/21°C

Day time
Avg. Highest Time
1 PM - 9 PM

40AQI

9 hours / Day
270 hours / Month
Avg. Lowest Time
5 AM - 6 AM

33AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 9 PM (Avg. 40), while the lowest AQI was between 5 AM to 6 AM (Avg. 33).
Night time
Avg. Highest Time
10 PM - 11 PM

38AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
12 AM - 4 AM

36AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 PM to 11 PM (Avg. 38), while the lowest AQI was between 12 AM to 4 AM (Avg. 36).

2026 Days Vs Air Quality

Caerdydd, Cardiff, United Kingdom

2026

92%

193

8%

16

Total number of days with different AQI categories in last 212 days in 2026 (153 days remaining)

Good
193 Days
Moderate
16 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 2026, 92% of 212 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

Caerdydd, Cardiff, United Kingdom

AQI levels in 2026

AQI (US)
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 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
31AQI (US)
2nd January 2026
19AQI (US)
3rd January 2026
23AQI (US)
4th January 2026
28AQI (US)
5th January 2026
28AQI (US)
6th January 2026
34AQI (US)
7th January 2026
22AQI (US)
8th January 2026
30AQI (US)
9th January 2026
13AQI (US)
10th January 2026
32AQI (US)
11th January 2026
28AQI (US)
12th January 2026
26AQI (US)
13th January 2026
15AQI (US)
14th January 2026
22AQI (US)
15th January 2026
29AQI (US)
16th January 2026
32AQI (US)
17th January 2026
19AQI (US)
18th January 2026
47AQI (US)
19th January 2026
46AQI (US)
20th January 2026
22AQI (US)
21st January 2026
18AQI (US)
22nd January 2026
33AQI (US)
23rd January 2026
47AQI (US)
24th January 2026
47AQI (US)
25th January 2026
47AQI (US)
26th January 2026
47AQI (US)
27th January 2026
16AQI (US)
28th January 2026
26AQI (US)
29th January 2026
42AQI (US)
30th January 2026
46AQI (US)
31st January 2026
37AQI (US)
1st February 2026
32AQI (US)
2nd February 2026
43AQI (US)
3rd February 2026
47AQI (US)
4th February 2026
26AQI (US)
5th February 2026
16AQI (US)
6th February 2026
32AQI (US)
7th February 2026
36AQI (US)
8th February 2026
37AQI (US)
9th February 2026
34AQI (US)
10th February 2026
25AQI (US)
11th February 2026
39AQI (US)
12th February 2026
23AQI (US)
13th February 2026
20AQI (US)
14th February 2026
43AQI (US)
15th February 2026
34AQI (US)
16th February 2026
36AQI (US)
17th February 2026
41AQI (US)
18th February 2026
40AQI (US)
19th February 2026
36AQI (US)
20th February 2026
43AQI (US)
21st February 2026
26AQI (US)
22nd February 2026
26AQI (US)
23rd February 2026
30AQI (US)
24th February 2026
34AQI (US)
25th February 2026
37AQI (US)
26th February 2026
24AQI (US)
27th February 2026
16AQI (US)
28th February 2026
28AQI (US)
1st March 2026
32AQI (US)
2nd March 2026
38AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
50AQI (US)
5th March 2026
78AQI (US)
6th March 2026
28AQI (US)
7th March 2026
49AQI (US)
8th March 2026
65AQI (US)
9th March 2026
73AQI (US)
10th March 2026
13AQI (US)
11th March 2026
29AQI (US)
12th March 2026
37AQI (US)
13th March 2026
34AQI (US)
14th March 2026
33AQI (US)
15th March 2026
29AQI (US)
16th March 2026
30AQI (US)
17th March 2026
33AQI (US)
18th March 2026
38AQI (US)
19th March 2026
52AQI (US)
20th March 2026
68AQI (US)
21st March 2026
74AQI (US)
22nd March 2026
75AQI (US)
23rd March 2026
52AQI (US)
24th March 2026
18AQI (US)
25th March 2026
18AQI (US)
26th March 2026
23AQI (US)
27th March 2026
26AQI (US)
28th March 2026
30AQI (US)
29th March 2026
29AQI (US)
30th March 2026
29AQI (US)
31st March 2026
25AQI (US)
1st April 2026
28AQI (US)
2nd April 2026
25AQI (US)
3rd April 2026
26AQI (US)
4th April 2026
26AQI (US)
5th April 2026
27AQI (US)
6th April 2026
27AQI (US)
7th April 2026
25AQI (US)
8th April 2026
29AQI (US)
9th April 2026
27AQI (US)
10th April 2026
27AQI (US)
11th April 2026
33AQI (US)
12th April 2026
31AQI (US)
13th April 2026
29AQI (US)
14th April 2026
27AQI (US)
15th April 2026
28AQI (US)
16th April 2026
33AQI (US)
17th April 2026
18th April 2026
28AQI (US)
19th April 2026
13AQI (US)
20th April 2026
24AQI (US)
21st April 2026
16AQI (US)
22nd April 2026
23rd April 2026
22AQI (US)
24th April 2026
21AQI (US)
25th April 2026
27AQI (US)
26th April 2026
49AQI (US)
27th April 2026
40AQI (US)
28th April 2026
24AQI (US)
29th April 2026
15AQI (US)
30th April 2026
24AQI (US)
1st May 2026
29AQI (US)
2nd May 2026
34AQI (US)
3rd May 2026
28AQI (US)
4th May 2026
45AQI (US)
5th May 2026
23AQI (US)
6th May 2026
18AQI (US)
7th May 2026
23AQI (US)
8th May 2026
30AQI (US)
9th May 2026
10th May 2026
32AQI (US)
11th May 2026
12AQI (US)
12th May 2026
25AQI (US)
13th May 2026
24AQI (US)
14th May 2026
19AQI (US)
15th May 2026
27AQI (US)
16th May 2026
34AQI (US)
17th May 2026
38AQI (US)
18th May 2026
33AQI (US)
19th May 2026
33AQI (US)
20th May 2026
31AQI (US)
21st May 2026
36AQI (US)
22nd May 2026
33AQI (US)
23rd May 2026
40AQI (US)
24th May 2026
51AQI (US)
25th May 2026
37AQI (US)
26th May 2026
46AQI (US)
27th May 2026
49AQI (US)
28th May 2026
31AQI (US)
29th May 2026
24AQI (US)
30th May 2026
24AQI (US)
31st May 2026
24AQI (US)
1st June 2026
26AQI (US)
2nd June 2026
22AQI (US)
3rd June 2026
23AQI (US)
4th June 2026
23AQI (US)
5th June 2026
23AQI (US)
6th June 2026
18AQI (US)
7th June 2026
25AQI (US)
8th June 2026
21AQI (US)
9th June 2026
22AQI (US)
10th June 2026
23AQI (US)
11th June 2026
23AQI (US)
12th June 2026
20AQI (US)
13th June 2026
23AQI (US)
14th June 2026
22AQI (US)
15th June 2026
22AQI (US)
16th June 2026
23AQI (US)
17th June 2026
15AQI (US)
18th June 2026
19AQI (US)
19th June 2026
22AQI (US)
20th June 2026
20AQI (US)
21st June 2026
18AQI (US)
22nd June 2026
20AQI (US)
23rd June 2026
21AQI (US)
24th June 2026
29AQI (US)
25th June 2026
41AQI (US)
26th June 2026
41AQI (US)
27th June 2026
17AQI (US)
28th June 2026
16AQI (US)
29th June 2026
22AQI (US)
30th June 2026
20AQI (US)
1st July 2026
22AQI (US)
2nd July 2026
20AQI (US)
3rd July 2026
24AQI (US)
4th July 2026
20AQI (US)
5th July 2026
18AQI (US)
6th July 2026
15AQI (US)
7th July 2026
22AQI (US)
8th July 2026
39AQI (US)
9th July 2026
31AQI (US)
10th July 2026
36AQI (US)
11th July 2026
28AQI (US)
12th July 2026
26AQI (US)
13th July 2026
30AQI (US)
14th July 2026
31AQI (US)
15th July 2026
28AQI (US)
16th July 2026
27AQI (US)
17th July 2026
38AQI (US)
18th July 2026
54AQI (US)
19th July 2026
35AQI (US)
20th July 2026
25AQI (US)
21st July 2026
32AQI (US)
22nd July 2026
58AQI (US)
23rd July 2026
84AQI (US)
24th July 2026
85AQI (US)
25th July 2026
61AQI (US)
26th July 2026
77AQI (US)
27th July 2026
79AQI (US)
28th July 2026
21AQI (US)
29th July 2026
23AQI (US)
30th July 2026
28AQI (US)
31st July 2026
27AQI (US)
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

31AQI (US)

32AQI (US)

40AQI (US)

27AQI (US)

31AQI (US)

23AQI (US)

37AQI (US)

No. of days

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

202632AQI (US)

31
28
23
8
28
29
1
30
24
7
193
16

Highest AQI (US) recorded in

March

40AQI (US)

Lowest AQI (US) recorded in

June

23AQI (US)

202536AQI (US)

16
15
16
12
28
3
30
31
28
2
29
2
29
2
30
21
10
27
3
25
6
310
55

Highest AQI (US) recorded in

February

51AQI (US)

Lowest AQI (US) recorded in

September

25AQI (US)

202436AQI (US)

25
5
24
5
26
5
30
27
4
28
2
31
30
1
25
5
31
20
9
1
31
328
36
1

Highest AQI (US) recorded in

November

46AQI (US)

Lowest AQI (US) recorded in

July

26AQI (US)

202343AQI (US)

22
8
21
7
26
5
16
14
20
11
10
20
27
4
27
4
18
11
24
7
24
5
28
3
263
99

Highest AQI (US) recorded in

June

54AQI (US)

Lowest AQI (US) recorded in

August

33AQI (US)

202246AQI (US)

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 (US) recorded in

March

57AQI (US)

Lowest AQI (US) recorded in

September

37AQI (US)

202136AQI (US)

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 (US) recorded in

March

47AQI (US)

Lowest AQI (US) recorded in

October

29AQI (US)

202032AQI (US)

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

Highest AQI (US) recorded in

April

49AQI (US)

Lowest AQI (US) recorded in

July

19AQI (US)

Most & Least Polluted Years Over the Last 7 Years

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

Caerdydd's annual 2026 AQI (US) (32) shows an average percentage change of -14.8% (improved AQI (US)) compared to previous years: 2020 (32), 2021 (36), 2022 (46), 2023 (43), 2024 (36), 2025 (36).