Chelmsford weather by month

Warmest month

July

23°C average high

Coolest month

January

3°C average low

Wettest month

October

82 mm of rain

Driest month

April

58 mm of rain

Average temperature and rainfall in Chelmsford by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	8°C	3°C	-4°C / 13°C	74 mm	89%	14 km/h
February	10°C	4°C	-2°C / 19°C	67 mm	84%	17 km/h
March	11°C	4°C	-2°C / 18°C	74 mm	79%	15 km/h
April	14°C	6°C	0°C / 21°C	58 mm	74%	15 km/h
May	17°C	8°C	1°C / 31°C	67 mm	75%	13 km/h
June	21°C	12°C	6°C / 31°C	58 mm	73%	12 km/h
July	23°C	14°C	11°C / 36°C	60 mm	71%	11 km/h
August	23°C	14°C	8°C / 31°C	67 mm	73%	13 km/h
September	20°C	12°C	4°C / 30°C	58 mm	79%	12 km/h
October	15°C	9°C	3°C / 23°C	82 mm	84%	14 km/h
November	11°C	6°C	-1°C / 16°C	79 mm	89%	14 km/h
December	9°C	4°C	-6°C / 14°C	74 mm	89%	17 km/h

Frost and snow-likely months in Chelmsford

No month in Chelmsford averages a night of 2°C or below. The coldest month is January with an average low of 3°C and a record low of -4°C, so frost is rare and snow is very unlikely.

These records carry temperature and precipitation, not snowfall totals.

Best time to visit Chelmsford

The most comfortable time to visit Chelmsford is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rainfall is spread evenly across the months, totalling about 818 mm a year.

Travellers who prefer heat should aim for July, when highs average 23°C. October is the month to avoid if rain would spoil your plans — it averages 82 mm, roughly 1× the rainfall of the driest month (April).

Chelmsford climate: your questions

Does it snow a lot in Chelmsford?

No: the coldest month in Chelmsford is January with an average low of 3°C and a record low of -4°C, so snow is very unlikely. What is falling now: Chelmsford weather today.

What is the climate like in Chelmsford?

Chelmsford's winter months average lows of 4°C in December, 3°C in January and 4°C in February, with about 216 mm of precipitation across the three; 0 of them sit at or below 0°C, so snow is unlikely. The records hold no snowfall totals. The next 15 days: Chelmsford 10-day forecast.

Which months are best for visiting Chelmsford?

June to August are the most comfortable months in Chelmsford, with highs near 22°C. July is the warmest month, averaging 23°C by day; October is the wettest, with 82 mm; and January is the coolest, with lows near 3°C. What it is doing today: Chelmsford weather today.

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Chelmsford forecast for what is happening now.

Nearest cities: Monthly climate

Basildon17 km
Colchester34 km