The climate in Lisbon during December can be summarized as mild and damp.
December is in the winter in Lisbon and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 9°C (48°F) is normal.
|Daytime temperature||15.1°C 59.1°F|
|Nightly temperature||9°C 48.1°F|
|Average temperature||12°C 53.6°F|
|Daily sunshine||5.1 hrs|
|Avg rainfall||106 mm 4.2 ins|
|Rainy days||14 days|
|Sea temperature||16.8°C 62.2°F|
|Windspeed||13.7kph 9 mph|
On average December is the 4th wettest month of the year in Lisbon with around 106mm 4.2 inches of rain making it a damp time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.1 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 2020.
|Hottest month:||August||28°C 82.4°F|
|Driest month:||July||4mm 0.2ins|
|Coldest month:||January||14.7°C 58.5°F|
|Wettest month:||November||111mm 4.4ins|