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
Air Quality Index Trend
30h · 1 stnChelmsford'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▲
9.1 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Chelmsford?
Temperature & Precipitation
PM2.5 Trend
30h · 1 stationPM2.59.1 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
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
147
Stanford-le-Hope Roadside, United Kingdom
40
Stanford-le-Hope Roadside, United Kingdom
4
united-kingdom-bishops-stortford-edens-close
30
Southend-on-Sea, United Kingdom
33
Southend-on-Sea, United Kingdom
What cities are near Chelmsford?
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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.