Air Quality in Watford, United Kingdom

Windy
16.1°C · 67.8% humidity
16.1°
Feels 16.1°
41
Good
Air quality is satisfactory. Enjoy outdoor activities.
35 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
4 4pm
4
4
41 7pm
31
24
19 10pm
15
13
11 1am
7
6
6 4am
5
5
5 7am
6
6
6 10am
6
6
13 1pm
13
13
Station readings
5
CAMS model adj -21
25
25
25
27
27
27
27
27
27
27
25
25
25
25
25
25
27
27
27
27
27
34
34
34
AD 728×90

Air Quality Index Trend

27h · 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.

67.8%
Humidity
82.0 km/h
Wind NE
1023.7 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
41
9.92 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Watford?

Temperature & Precipitation

PM2.5 Trend

27h · 1 station
PM2.59.92 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (35 stations within 25 km)
9.92
Median
9.85
Average
1.04
Low
33.5
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -3.7

What is the 7-day forecast for Watford?

05-29
16.1° 11.8°
1.56 mm
05-30
17.7° 11.3°
0.88 mm
05-31
18.1° 8.6°
06-01
19.4° 8.3°
0.56 mm
06-02
19.0° 10.7°
1.75 mm
06-03
15.9° 10.5°
0.06 mm
06-04
28.6° 17.6°
3.94 mm
Both models agree Avg diff: 3.7°C

Where are air quality stations near Watford?

38
Harlesden HP1
17.0 km PM2.5: 9.0 µg/m³
30
Harlesden LP1
17.1 km PM2.5: 7.3 µg/m³
36
Harlesden HP2
17.3 km PM2.5: 8.7 µg/m³
35
Harlesden LP2
17.3 km PM2.5: 8.5 µg/m³
13
London Harlington, United Kingdom
18.8 km PM2.5: 3.1 µg/m³
65
London Harlington, United Kingdom
18.8 km PM2.5: 18.8 µg/m³
42
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 10.1 µg/m³
13
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 3.1 µg/m³
33
London Hillingdon Harmondsworth Os, United Kingdom
19.5 km PM2.5: 7.9 µg/m³
21
London N. Kensington, United Kingdom
19.5 km PM2.5: 5.0 µg/m³

What cities are near Watford?

41 Bushey 39 North Watford 43 Pinner 43 Wealdstone 42 Borehamwood 44 Ruislip 43 Harrow 45 South Ruislip 35 St Albans 5 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 2026-05-29T18:43 UTC.