What is the air quality in Chelmsford today?

The current Air Quality Index (AQI) in Chelmsford is 8 (Good). PM2.5 concentration is 1.9 µg/m³.

What is the temperature in Chelmsford right now?

The current temperature in Chelmsford is 10.8°C (feels like 10.8°C). Humidity is 78.7% and wind speed is 47.6 km/h.

Is it safe to go outside in Chelmsford?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Chelmsford, United Kingdom

Windy

10.8°C · 78.7% humidity

10.8°

Feels 10.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Station readings 4h ago

AQI 4

PM2.5 0.9 µg/m³ · 4h ago

Air Quality Index Trend

44h · 1 stn

View full history →

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.

78.7%

Humidity

47.6 km/h

Wind N

1019.4 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

1.9 µg/m³

PM10▲

13.7 µg/m³

050100150200300500

What is the weather forecast for Chelmsford?

Temperature & Precipitation

PM2.5 Trend

44h · 1 station

PM2.51.9 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

1.9

Median

1.9

Average

1.9

Low

1.9

High

PM2.5 µg/m³ · Model: 6.0 · Bias: +4.1

What is the 7-day forecast for Chelmsford?

10-21

10.8° 7.7°

0.25 mm

10-22

19.2° 7.5°

0.06 mm

10-23

14.8° 9.3°

13.75 mm

10-24

13.4° 8.1°

0.19 mm

10-25

15.9° 9.9°

5.38 mm

10-26

11.7° 7.8°

1.19 mm

10-27

18.0° 5.8°

0.31 mm

Both models agree Avg diff: 3.1°C

Where are air quality stations near Chelmsford?

Stanford-le-Hope Roadside, United Kingdom

24.3 km PM2.5: 1.2 µg/m³

Stanford-le-Hope Roadside, United Kingdom

24.3 km PM2.5: 1.9 µg/m³

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united-kingdom-bishops-stortford-edens-close

25.3 km 13.0°C 70.0% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

Southend-on-Sea, United Kingdom

25.7 km PM2.5: 8.2 µg/m³

What cities are near Chelmsford?

15 Billericay 35 Witham 34 Maldon 23 Wickford 34 Braintree 18 Brentwood 12 Basildon 30 Rayleigh 17 Pitsea 25 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 2026-10-21T13:14 UTC.