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Thetford, England climate
Cfb Oceanic / temperate
Thetford 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 657 mm. At latitude 53°N, day length swings from 7.4 hours in midwinter to 16.6 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)Thetford climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 11 | 14 | 17 | 20 | 22 | 22 | 19 | 15 | 10 | 7 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 | 17 | 17 | 14 | 11 | 7 | 4 |
| Avg low (°C) | 1 | 1 | 2 | 4 | 7 | 10 | 12 | 12 | 10 | 7 | 4 | 1 |
| Precipitation (mm) | 53 | 43 | 48 | 40 | 47 | 62 | 60 | 61 | 59 | 62 | 63 | 61 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 11 | 14 | 17 | 20 |
| Avg temp (°C) | 4 | 5 | 7 | 9 | 12 | 15 |
| Avg low (°C) | 1 | 1 | 2 | 4 | 7 | 10 |
| Precipitation (mm) | 53 | 43 | 48 | 40 | 47 | 62 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 19 | 15 | 10 | 7 |
| Avg temp (°C) | 17 | 17 | 14 | 11 | 7 | 4 |
| Avg low (°C) | 12 | 12 | 10 | 7 | 4 | 1 |
| Precipitation (mm) | 60 | 61 | 59 | 62 | 63 | 61 |
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 (%) | 93 | 89 | 85 | 81 | 79 | 79 | 78 | 79 | 82 | 87 | 92 | 94 |
| Wind speed (mph) | 8.7 | 8.8 | 8.4 | 7.3 | 7.0 | 6.5 | 6.3 | 6.7 | 7.1 | 7.9 | 7.9 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 70 | 71 | 67 | 67 | 71 |
| Relative humidity (%) | 93 | 89 | 85 | 81 | 79 | 79 |
| Wind speed (mph) | 8.7 | 8.8 | 8.4 | 7.3 | 7.0 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 68 | 66 | 68 | 69 | 69 |
| Relative humidity (%) | 78 | 79 | 82 | 87 | 92 | 94 |
| Wind speed (mph) | 6.3 | 6.7 | 7.1 | 7.9 | 7.9 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Marham, a weather station, about 29 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.