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Cwmbran, Wales climate
Cfb Oceanic / temperate
Cwmbran has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 65°F, while the coldest is January averaging around 33°F at night. Around 53 inches of precipitation falls each year, peaking in December (6.2 inches) and easing off in April (3.0 inches). 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)Cwmbran climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 44 | 48 | 53 | 58 | 63 | 65 | 65 | 61 | 55 | 48 | 43 |
| Avg temp (°F) | 38 | 38 | 41 | 45 | 50 | 55 | 57 | 57 | 53 | 48 | 42 | 38 |
| Avg low (°F) | 33 | 33 | 35 | 37 | 42 | 46 | 50 | 49 | 46 | 42 | 37 | 34 |
| Precipitation (in) | 5.1 | 4.6 | 4.0 | 3.0 | 3.3 | 3.2 | 3.4 | 3.9 | 4.1 | 6.1 | 5.8 | 6.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 44 | 48 | 53 | 58 | 63 |
| Avg temp (°F) | 38 | 38 | 41 | 45 | 50 | 55 |
| Avg low (°F) | 33 | 33 | 35 | 37 | 42 | 46 |
| Precipitation (in) | 5.1 | 4.6 | 4.0 | 3.0 | 3.3 | 3.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 65 | 65 | 61 | 55 | 48 | 43 |
| Avg temp (°F) | 57 | 57 | 53 | 48 | 42 | 38 |
| Avg low (°F) | 50 | 49 | 46 | 42 | 37 | 34 |
| Precipitation (in) | 3.4 | 3.9 | 4.1 | 6.1 | 5.8 | 6.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 77 | 77 | 75 | 75 | 76 | 74 | 75 | 73 | 76 | 76 | 76 |
| Relative humidity (%) | 96 | 94 | 92 | 87 | 85 | 85 | 85 | 87 | 89 | 92 | 95 | 96 |
| Wind speed (mph) | 9.1 | 9.0 | 8.4 | 7.5 | 7.2 | 6.8 | 6.6 | 6.6 | 6.9 | 7.9 | 8.1 | 8.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 77 | 77 | 75 | 75 | 76 |
| Relative humidity (%) | 96 | 94 | 92 | 87 | 85 | 85 |
| Wind speed (mph) | 9.1 | 9.0 | 8.4 | 7.5 | 7.2 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 75 | 73 | 76 | 76 | 76 |
| Relative humidity (%) | 85 | 87 | 89 | 92 | 95 | 96 |
| Wind speed (mph) | 6.6 | 6.6 | 6.9 | 7.9 | 8.1 | 8.8 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Sennybridge No2, a weather station, about 61 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.