Air Quality in Watford, United Kingdom

Drizzle
8.0°C · 91.5% humidity
8.0°
Feels 4.0°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
19 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
0 9pm
0
0
25 12am
20
14
10 3am
7
5
4 6am
3
2
1 9am
1
1
1 12pm
0
0
0 3pm
0
0
0 6pm
0
0
Station readings 9h ago
AQI 4
PM2.5 1.0 µg/m³ · 9h ago
CAMS model adj -28
25
25
24
25
25
25
25
25
25
25
25
25
27
25
25
25
25
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

11h · 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.

91.5%
Humidity
29.0 km/h
Wind WNW
1020.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.09 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Watford?

Temperature & Precipitation

PM2.5 Trend

11h · 1 station
PM2.56.09 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (19 stations within 25 km)
6.09
Median
5.78
Average
1.11
Low
9.8
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -0.2

What is the 7-day forecast for Watford?

06-08
17.3° 7.8°
2.0 mm
06-09
15.8° 8.0°
0.56 mm
06-10
13.3° 11.7°
7.94 mm
06-11
25.2° 13.5°
1.75 mm
06-12
20.9° 9.0°
06-13
21.6° 9.8°
0.19 mm
06-14
20.4° 10.5°
1.06 mm
Both models agree Avg diff: 4.2°C

Where are air quality stations near Watford?

22
Harlesden HP1
17.0 km PM2.5: 5.2 µg/m³
18
Harlesden LP1
17.1 km PM2.5: 4.4 µg/m³
28
Harlesden HP2
17.3 km PM2.5: 6.8 µg/m³
23
Harlesden LP2
17.3 km PM2.5: 5.6 µg/m³
113
London Harlington, United Kingdom
18.8 km PM2.5: 40.4 µg/m³
42
London Harlington, United Kingdom
18.8 km PM2.5: 10.1 µg/m³
26
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 6.2 µg/m³
2
Hounslow Brentford, United Kingdom
19.4 km PM2.5: 0.5 µg/m³
7
London Hillingdon Harmondsworth Os, United Kingdom
19.5 km PM2.5: 1.7 µg/m³
15
London N. Kensington, United Kingdom
19.5 km PM2.5: 3.6 µg/m³

What cities are near Watford?

26 Bushey 26 North Watford 26 Pinner 27 Wealdstone 26 Borehamwood 25 Ruislip 27 Harrow 25 South Ruislip 30 St Albans 24 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 2026-06-08T23:22 UTC.