Air Quality in Chelmsford, United Kingdom

Windy
14.1°C · 68.2% humidity
14.1°
Feels 14.1°
38
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
9 1am
9
9
38 4am
30
24
20 7am
8
5
4 10am
3
2
1 1pm
1
1
1 4pm
0
0
0 7pm
0
0
0 10pm
0
0
Station readings
4
5
4
CAMS model adj -45
54
54
54
54
54
54
54
34
27
27
27
27
27
34
27
27
27
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

30h · 1 stn

Chelmsford'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.

68.2%
Humidity
46.4 km/h
Wind NE
1016.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
38
9.1 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Chelmsford?

Temperature & Precipitation

PM2.5 Trend

30h · 1 station
PM2.59.1 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (1 station within 25 km)
9.1
Median
9.1
Average
9.1
Low
9.1
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +0.9

What is the 7-day forecast for Chelmsford?

07-22
25.9° 12.8°
0.62 mm
07-23
19.7° 15.4°
1.94 mm
07-24
22.8° 16.0°
3.25 mm
07-25
30.1° 13.2°
07-26
22.9° 13.1°
1.31 mm
07-27
27.5° 17.0°
0.94 mm
07-28
25.0° 17.0°
Both models agree Avg diff: 2.8°C

Where are air quality stations near Chelmsford?

21
Stanford-le-Hope Roadside, United Kingdom
24.3 km PM2.5: 5.0 µg/m³
147
Stanford-le-Hope Roadside, United Kingdom
24.3 km PM2.5: 54.2 µg/m³
40
Stanford-le-Hope Roadside, United Kingdom
24.3 km PM2.5: 9.6 µg/m³
4
united-kingdom-bishops-stortford-edens-close
25.3 km 20.0°C 52.0% RH PM2.5: 1.0 µg/m³ PM10: 1.1 µg/m³
30
Southend-on-Sea, United Kingdom
25.7 km PM2.5: 7.2 µg/m³
33
Southend-on-Sea, United Kingdom
25.7 km PM2.5: 7.9 µg/m³

What cities are near Chelmsford?

29 Billericay 38 Witham 20 Maldon 27 Wickford 39 Braintree 34 Brentwood 33 Basildon 23 Rayleigh 30 Pitsea 26 South Benfleet
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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 2026-07-22T03:20 UTC.