Air Quality in Watford, United Kingdom

Clear
15.5°C · 48.1% humidity
15.5°
Feels 15.5°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
17 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
8 5pm
8
8
30 8pm
40
57
57 11pm
57
57
40 2am
40
40
40 5am
28
28
28 8am
28
28
8 11am
8
8
8 2pm
8
8
Station readings 4h ago
AQI 4
PM2.5 1.0 µg/m³ · 4h ago
CAMS model adj -26
34
34
34
54
66
83
83
83
83
66
66
66
66
54
54
54
54
54
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

18h · 1 stn

Watford'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.

48.1%
Humidity
22.2 km/h
Wind NNW
1029.2 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
30
7.31 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Watford?

Temperature & Precipitation

PM2.5 Trend

18h · 1 station
PM2.57.31 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (17 stations within 25 km)
7.31
Median
7.15
Average
3.4
Low
12.0
High
PM2.5 µg/m³ · Model: 9.75 · Bias: +2.4

What is the 7-day forecast for Watford?

09-05
15.5° 10.3°
0.25 mm
09-06
17.8° 10.0°
0.13 mm
09-07
14.2° 12.5°
1.5 mm
09-08
21.8° 8.1°
0.44 mm
09-09
18.7° 8.5°
0.5 mm
09-10
21.7° 13.2°
09-11
15.8° 11.3°
0.5 mm
Both models agree Avg diff: 3.3°C

Where are air quality stations near Watford?

46
Brent - Ikea, United Kingdom
14.9 km PM2.5: 11.0 µg/m³
38
Brent - ARK Franklin Primary Academy, United Kingdom
18.4 km PM2.5: 9.1 µg/m³
29
London Harlington, United Kingdom
18.8 km PM2.5: 7.0 µg/m³
33
London Harlington, United Kingdom
18.8 km PM2.5: 7.9 µg/m³
19
Enfield - Bowes Primary School, United Kingdom
19.2 km PM2.5: 4.6 µg/m³
30
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 7.2 µg/m³
30
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 7.2 µg/m³
23
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 5.5 µg/m³
23
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 5.5 µg/m³
30
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 7.2 µg/m³

What cities are near Watford?

31 Bushey 30 North Watford 31 Pinner 32 Wealdstone 32 Borehamwood 29 Ruislip 33 Harrow 29 South Ruislip 30 St Albans 40 Hemel Hempstead
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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 2026-09-05T19:26 UTC.