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Colchester, England climate
Cfb Oceanic / temperate
Colchester has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 22°C, while the coldest is January averaging around 1°C at night. Precipitation is fairly even year-round, totalling about 636 mm. At latitude 52°N, day length swings from 7.5 hours in midwinter to 16.5 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Colchester climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 7 | 10 | 13 | 17 | 20 | 22 | 22 | 19 | 14 | 10 | 7 |
| Avg temp (°C) | 4 | 4 | 6 | 9 | 12 | 14 | 17 | 17 | 14 | 10 | 6 | 4 |
| Avg low (°C) | 1 | 1 | 2 | 4 | 6 | 9 | 12 | 12 | 9 | 5 | 3 | 1 |
| Precipitation (mm) | 47 | 44 | 50 | 37 | 52 | 53 | 56 | 67 | 50 | 62 | 64 | 55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 7 | 10 | 13 | 17 | 20 |
| Avg temp (°C) | 4 | 4 | 6 | 9 | 12 | 14 |
| Avg low (°C) | 1 | 1 | 2 | 4 | 6 | 9 |
| Precipitation (mm) | 47 | 44 | 50 | 37 | 52 | 53 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 19 | 14 | 10 | 7 |
| Avg temp (°C) | 17 | 17 | 14 | 10 | 6 | 4 |
| Avg low (°C) | 12 | 12 | 9 | 5 | 3 | 1 |
| Precipitation (mm) | 56 | 67 | 50 | 62 | 64 | 55 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 70 | 71 | 67 | 67 | 71 | 68 | 68 | 66 | 68 | 69 | 69 |
| Relative humidity (%) | 91 | 88 | 86 | 82 | 81 | 81 | 80 | 80 | 83 | 86 | 91 | 92 |
| Wind speed (km/h) | 17.9 | 17.3 | 15.8 | 13.6 | 13.3 | 12.4 | 12.1 | 12.9 | 14.1 | 16.2 | 16.5 | 17.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 70 | 71 | 67 | 67 | 71 |
| Relative humidity (%) | 91 | 88 | 86 | 82 | 81 | 81 |
| Wind speed (km/h) | 17.9 | 17.3 | 15.8 | 13.6 | 13.3 | 12.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 68 | 66 | 68 | 69 | 69 |
| Relative humidity (%) | 80 | 80 | 83 | 86 | 91 | 92 |
| Wind speed (km/h) | 12.1 | 12.9 | 14.1 | 16.2 | 16.5 | 17.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Wattisham, a weather station, about 27 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.