Air Quality in Chelmsford, United Kingdom
Overcast
13.2°C · 98.4% humidity
13.2°
Feels 13.2°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Chelmsford's air quality — share it
AQI Forecast
Calibrated
6
7pm
6
6
30
10pm
25
20
17
1am
12
11
9
4am
8
8
7
7am
7
9
8
10am
8
8
8
1pm
15
15
15
4pm
15
8
Station readings
4
4
CAMS model
adj -19
25
25
25
25
27
27
27
25
25
25
25
25
25
25
27
27
27
27
27
34
34
34
34
27
Air Quality Index Trend
40h · 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.
98.4%
Humidity
28.5 km/h
Wind WSW
1007.8 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Chelmsford?
Temperature & Precipitation
PM2.5 Trend
40h · 1 stationPM2.57.1 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (2 stations within 25 km)
7.1
Median
7.1
Average
6.0
Low
8.2
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -0.9
What is the 7-day forecast for Chelmsford?
05-29
14.8° 13.1°
1.13 mm
05-30
17.7° 12.3°
0.19 mm
05-31
19.1° 8.9°
06-01
19.6° 8.9°
0.19 mm
06-02
18.1° 13.2°
1.44 mm
06-03
17.7° 11.4°
0.06 mm
06-04
26.9° 16.5°
3.88 mm
Both models agree
Avg diff: 3.2°C
Where are air quality stations near Chelmsford?
22
Stanford-le-Hope Roadside, United Kingdom
61
Stanford-le-Hope Roadside, United Kingdom
80
Stanford-le-Hope Roadside, United Kingdom
4
united-kingdom-bishops-stortford-edens-close
87
Southend-on-Sea, United Kingdom
21
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 2026-05-29T21:40 UTC.