Clydach Vale Weather in December
What's the weather like in Clydach Vale (Wales) in December 2025?
The climate in Clydach Vale during December can be summarized as cool and wet.
December is in the winter in Clydach Vale and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cold 8°C (45°F), whilst at night 2°C (36°F) is normal.
| Daytime temperature | 7.5°C 45.4°F |
|---|---|
| Nightly temperature | 2.4°C 36.2°F |
| Average temperature | 4.9°C 40.8°F |
| Daily sunshine | 1.7 hrs |
| Avg rainfall | 163 mm 6.4 ins |
| Rainy days | 20 days |
| Sea temperature | 11.6°C 52.9°F |
| Humidity | 92% |
| Windspeed | 20.5kph 13 mph |
On average December is the wettest month of the year in Clydach Vale with around 163mm 6.4 inches of rain making it a wet time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.7 hours of sunshine per day.
December temperatures in Clydach Vale
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Clydach Vale in December 2025.
Other monthly averages
Best places to visit in December
Clydach Vale weather stats
| Hottest month: | July | 19.2°C 66.6°F |
|---|---|---|
| Driest month: | April | 82mm 3.2ins |
| Sunniest month: | August | 6.2hrs |
| Coldest month: | February | 6.2°C 43.2°F |
| Wettest month: | December | 163mm 6.4ins |
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