Dorchester Weather in December
What's the weather like in Dorchester (England) in December 2025?
The climate in Dorchester during December can be summarized as cool and a little damp.
December is in the winter in Dorchester and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 9°C (47°F), whilst at night 3°C (37°F) is normal.
| Daytime temperature | 8.5°C 47.2°F |
|---|---|
| Nightly temperature | 2.8°C 37°F |
| Average temperature | 5.6°C 42.1°F |
| Daily sunshine | 2 hrs |
| Avg rainfall | 100 mm 3.9 ins |
| Rainy days | 18 days |
| Sea temperature | 11.7°C 53°F |
| Humidity | 92% |
| Windspeed | 17.6kph 11 mph |
On average December is the wettest month of the year in Dorchester with around 100mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 2 hours of sunshine per day.
December temperatures in Dorchester
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 Dorchester in December 2025.
Other monthly averages
Best places to visit in December
Dorchester weather stats
| Hottest month: | July | 19.9°C 67.8°F |
|---|---|---|
| Driest month: | April | 53mm 2.1ins |
| Sunniest month: | July | 7.7hrs |
| Coldest month: | February | 7.1°C 44.8°F |
| Wettest month: | December | 100mm 3.9ins |
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