Air Quality in Cardiff, United Kingdom

Windy
16.1°C · 39.8% humidity
16.1°
Feels 16.1°
73
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
48 12am
46
46
73 3am
65
60
56 6am
53
51
50 9am
49
48
47 12pm
47
47
46 3pm
46
46
46 6pm
46
46
46 9pm
46
46
Station readings
35
34
59
87
CAMS model adj +21
27
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

15h · 1 stn

Cardiff's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level. Current PM2.5 concentration in Cardiff is 1.5× the WHO 24-hour guideline of 15 µg/m³.

39.8%
Humidity
56.6 km/h
Wind NNE
1014.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
73
22.54 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Cardiff?

Temperature & Precipitation

PM2.5 Trend

15h · 1 station
PM2.522.54 µg/m³ ×1.5 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (4 stations within 25 km)
22.54
Median
14.57
Average
4.6
Low
29.2
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -16.5

What is the 7-day forecast for Cardiff?

07-22
22.0° 14.7°
4.44 mm
07-23
20.3° 13.7°
0.81 mm
07-24
16.8° 14.5°
10.44 mm
07-25
21.8° 9.9°
0.19 mm
07-26
23.5° 10.6°
2.12 mm
07-27
20.5° 14.9°
2.56 mm
07-28
24.3° 15.2°
Both models agree Avg diff: 3.1°C

Where are air quality stations near Cardiff?

50
Cardiff Centre, United Kingdom
0.3 km PM2.5: 12.0 µg/m³
19
Cardiff Newport Road, United Kingdom
2.3 km PM2.5: 4.6 µg/m³
20
Cardiff Newport Road, United Kingdom
2.3 km PM2.5: 4.8 µg/m³
56
Caerphilly White Street, United Kingdom
10.8 km PM2.5: 14.5 µg/m³
38
Caerphilly White Street, United Kingdom
10.8 km PM2.5: 9.1 µg/m³
–
Nantgarw Road
11.2 km
–
Caerphilly Islwyn Road Wattsville
15.3 km
–
Rhondda Pontypridd Gelliwastad Rd
17.8 km
17
Newport, United Kingdom
19.4 km PM2.5: 4.1 µg/m³
–
Hafod-yr-ynys Hill Roadside
22.5 km

What cities are near Cardiff?

71 Penarth 19 Caerphilly 67 Barry 45 Risca 37 Newport 45 Pontypridd 73 Weston-super-Mare 42 Blackwood 42 Gelligaer 41 Cwmbran
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-22T02:15 UTC.