The climate in Cascais during December can be summarized as mild and wet.
December is in the winter in Cascais 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 | 14.7°C 58.5°F |
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Nightly temperature | 8.9°C 48°F |
Average temperature | 11.8°C 53.2°F |
Daily sunshine | 5.1 hrs |
Avg rainfall | 120 mm 4.7 ins |
Rainy days | 14 days |
Sea temperature | 16.8°C 62.2°F |
Humidity | 80% |
Windspeed | 14kph 9 mph |
On average December is the 4th wettest month of the year in Cascais with around 120mm 4.7 inches of rain making it a wet 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 Cascais in December 2024.
Best places to visit in December
Hottest month: | August | 26.6°C 79.9°F |
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Driest month: | July | 7mm 0.3ins |
Sunniest month: | August | 11.6hrs |
Coldest month: | January | 14.2°C 57.6°F |
Wettest month: | January | 123mm 4.8ins |