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!
June Air Quality Analysis
Caerdydd, Cardiff, United Kingdom
AQI Trends: Highest and Lowest
Same Day Analysis (4th June):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 23 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Caerdydd, Cardiff, United Kingdom
5 AM3rd Jun 2026
9 PM
4 AM4th Jun 2026
29AQI
8AQI
27AQI
18AQI
In the last 24 hours,
Caerdydd's AQI reached its highest point of 29 at 7 PM during the Day, while the lowest point, 8, was recorded at 8 AM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Caerdydd, Cardiff, United Kingdom
10°C8/12°C
10°C7/13°C
11°C8/15°C
12°C8/17°C
10°C7/13°C
9°C4/13°C
10°C5/14°C
10°C7/13°C
9°C6/12°C
9°C4/13°C
9°C4/12°C
10°C6/13°C
10°C8/12°C
13°C11/15°C
14°C11/16°C
14°C10/18°C
16°C11/21°C
16°C12/19°C
16°C11/21°C
20°C15/25°C
21°C16/26°C
19°C16/24°C
17°C13/23°C
15°C11/18°C
14°C10/19°C
14°C11/17°C
14°C12/16°C
14°C12/16°C
14°C11/17°C
13°C12/16°C
33AQI
27AQI
33AQI
31AQI
2026 Days Vs Air Quality
Caerdydd, Cardiff, United Kingdom
94%
143
6%
9
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 155 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
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI (US)
19AQI (US)
23AQI (US)
28AQI (US)
28AQI (US)
34AQI (US)
22AQI (US)
30AQI (US)
13AQI (US)
32AQI (US)
28AQI (US)
26AQI (US)
15AQI (US)
22AQI (US)
29AQI (US)
32AQI (US)
19AQI (US)
47AQI (US)
46AQI (US)
22AQI (US)
18AQI (US)
33AQI (US)
47AQI (US)
47AQI (US)
47AQI (US)
47AQI (US)
16AQI (US)
26AQI (US)
42AQI (US)
46AQI (US)
37AQI (US)
32AQI (US)
43AQI (US)
47AQI (US)
26AQI (US)
16AQI (US)
32AQI (US)
36AQI (US)
37AQI (US)
34AQI (US)
25AQI (US)
39AQI (US)
23AQI (US)
20AQI (US)
43AQI (US)
34AQI (US)
36AQI (US)
41AQI (US)
40AQI (US)
36AQI (US)
43AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
34AQI (US)
37AQI (US)
24AQI (US)
16AQI (US)
28AQI (US)
32AQI (US)
38AQI (US)
44AQI (US)
50AQI (US)
78AQI (US)
28AQI (US)
49AQI (US)
65AQI (US)
73AQI (US)
13AQI (US)
29AQI (US)
37AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
33AQI (US)
38AQI (US)
52AQI (US)
68AQI (US)
74AQI (US)
75AQI (US)
52AQI (US)
18AQI (US)
18AQI (US)
23AQI (US)
26AQI (US)
30AQI (US)
29AQI (US)
29AQI (US)
25AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
25AQI (US)
29AQI (US)
27AQI (US)
27AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
33AQI (US)
28AQI (US)
13AQI (US)
24AQI (US)
16AQI (US)
22AQI (US)
21AQI (US)
27AQI (US)
49AQI (US)
40AQI (US)
24AQI (US)
15AQI (US)
24AQI (US)
29AQI (US)
34AQI (US)
28AQI (US)
45AQI (US)
23AQI (US)
18AQI (US)
23AQI (US)
30AQI (US)
32AQI (US)
12AQI (US)
25AQI (US)
24AQI (US)
19AQI (US)
27AQI (US)
34AQI (US)
38AQI (US)
33AQI (US)
33AQI (US)
31AQI (US)
36AQI (US)
33AQI (US)
40AQI (US)
51AQI (US)
37AQI (US)
46AQI (US)
49AQI (US)
31AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
23AQI (US)
23AQI (US)
31AQI (US)
32AQI (US)
40AQI (US)
27AQI (US)
31AQI (US)
24AQI (US)
No. of days
202632AQI (US)
Highest AQI (US) recorded in
March40AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202536AQI (US)
Highest AQI (US) recorded in
February51AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202436AQI (US)
Highest AQI (US) recorded in
November46AQI (US)
Lowest AQI (US) recorded in
July26AQI (US)
202343AQI (US)
Highest AQI (US) recorded in
June54AQI (US)
Lowest AQI (US) recorded in
August33AQI (US)
202246AQI (US)
Highest AQI (US) recorded in
March57AQI (US)
Lowest AQI (US) recorded in
September37AQI (US)
202136AQI (US)
Highest AQI (US) recorded in
March47AQI (US)
Lowest AQI (US) recorded in
October29AQI (US)
202032AQI (US)
Highest AQI (US) recorded in
April49AQI (US)
Lowest AQI (US) recorded in
July19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
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).