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Weymouth, England climate
Cfb Oceanic / temperate
Weymouth has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 19°C, while the coldest is February averaging around 5°C at night. Around 731 mm of precipitation falls each year, peaking in October (89 mm) and easing off in September (41 mm). At latitude 51°N, day length swings from 7.8 hours in midwinter to 16.2 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)Weymouth climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 8 | 10 | 12 | 14 | 17 | 19 | 19 | 18 | 15 | 12 | 9 |
| Avg temp (°C) | 7 | 7 | 8 | 9 | 12 | 15 | 17 | 17 | 16 | 13 | 10 | 8 |
| Avg low (°C) | 5 | 5 | 6 | 7 | 10 | 12 | 14 | 15 | 14 | 11 | 8 | 6 |
| Precipitation (mm) | 76 | 67 | 49 | 49 | 43 | 42 | 52 | 61 | 41 | 89 | 84 | 77 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 8 | 10 | 12 | 14 | 17 |
| Avg temp (°C) | 7 | 7 | 8 | 9 | 12 | 15 |
| Avg low (°C) | 5 | 5 | 6 | 7 | 10 | 12 |
| Precipitation (mm) | 76 | 67 | 49 | 49 | 43 | 42 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 19 | 19 | 18 | 15 | 12 | 9 |
| Avg temp (°C) | 17 | 17 | 16 | 13 | 10 | 8 |
| Avg low (°C) | 14 | 15 | 14 | 11 | 8 | 6 |
| Precipitation (mm) | 52 | 61 | 41 | 89 | 84 | 77 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 77 | 73 | 67 | 67 | 66 | 64 | 65 | 67 | 74 | 77 | 78 |
| Relative humidity (%) | 86 | 86 | 87 | 85 | 84 | 84 | 84 | 83 | 83 | 83 | 85 | 86 |
| Wind speed (km/h) | 25.0 | 23.3 | 20.9 | 18.1 | 17.0 | 15.8 | 15.8 | 16.8 | 19.1 | 22.6 | 23.6 | 24.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 77 | 73 | 67 | 67 | 66 |
| Relative humidity (%) | 86 | 86 | 87 | 85 | 84 | 84 |
| Wind speed (km/h) | 25.0 | 23.3 | 20.9 | 18.1 | 17.0 | 15.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 67 | 74 | 77 | 78 |
| Relative humidity (%) | 84 | 83 | 83 | 83 | 85 | 86 |
| Wind speed (km/h) | 15.8 | 16.8 | 19.1 | 22.6 | 23.6 | 24.8 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Isle OF Portland, a weather station, about 11 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.