The climate in Porthleven during December can be summarized as cool and wet.
December is in the winter in Porthleven and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 10°C (49°F), whilst at night 5°C (41°F) is normal.
|Daytime temperature||9.7°C 49.4°F|
|Nightly temperature||5°C 40.9°F|
|Average temperature||7.3°C 45.1°F|
|Daily sunshine||1.9 hrs|
|Avg rainfall||122 mm 4.8 ins|
|Rainy days||21 days|
|Sea temperature||11.3°C 52.3°F|
|Windspeed||23.8kph 15 mph|
On average December is the 2nd wettest month of the year in Porthleven with around 122mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 21 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.9 hours of sunshine per day.
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 December 2019.
|Hottest month:||August||18.6°C 65.5°F|
|Driest month:||July||58mm 2.3ins|
|Coldest month:||February||8.2°C 46.8°F|
|Wettest month:||January||127mm 5ins|