Plymouth Weather in December
What's the weather like in Plymouth (Saint Anthony) in December 2025?
The climate in Plymouth during December can be summarized as hot, humid and wet.
December is in the winter in Plymouth and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 28°C (81°F), whilst at night 21°C (69°F) is normal.
| Daytime temperature | 27.5°C 81.4°F |
|---|---|
| Nightly temperature | 20.8°C 69.4°F |
| Average temperature | 24.1°C 75.4°F |
| Daily sunshine | 7.5 hrs |
| Avg rainfall | 120 mm 4.7 ins |
| Rainy days | 20 days |
| Sea temperature | 27.5°C 81.5°F |
| Humidity | 79% |
| Windspeed | 19.4kph 12 mph |
On average December is the 5th driest month of the year in Plymouth with around 120mm 4.7 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 7.5 hours of sunshine per day.
December temperatures in Plymouth
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 Plymouth in December 2025.
Other monthly averages
Best places to visit in December
Plymouth weather stats
| Hottest month: | August | 29.6°C 85.3°F |
|---|---|---|
| Driest month: | February | 65mm 2.6ins |
| Sunniest month: | January | 8.1hrs |
| Coldest month: | February | 26.7°C 80.1°F |
| Wettest month: | September | 203mm 8ins |
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