Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
Shifting into December, Estoril records an average high-temperature of a still refreshing 15.5°C (59.9°F), presenting minor fluctuations compared to the previous month. Estoril notes an average temperature descent to a cool 12.5°C (54.5°F) in December, a small shift from its daytime peak.Humidity
The average relative humidity in December is 75%.Rainfall
In December, in Estoril, Portugal, the rain falls for 11 days. Throughout December, 52mm (2.05") of precipitation is accumulated. Throughout the year, in Estoril, there are 106.9 rainfall days, and 365mm (14.37") of precipitation is accumulated.Sea temperature
In Estoril, the average seawater temperature in December is 16.6°C (61.9°F).Note: Swimming is not a pleasurable activity for the majority in water at 16.6°C (61.9°F). Breathing control gets harder as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Estoril, sunrise is at 07:37 and sunset at 17:16. On the last day of the month, sunrise is at 07:55 and sunset at 17:26 WET.
Sunshine
The average sunshine in December is 6h.UV index
January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during December translates into the following guidance:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Estoril?
What is the average humidity in December in Estoril?
How many days does it rain in December in Estoril?
How cold is the water in December in Estoril?
What is the month with the shortest days in Estoril?
How many hours of daylight does Estoril have in December?
What time are sunrise and sunset in December in Estoril?
How long on average sun shines in December in Estoril?
What is the month with the lowest UV index in Estoril?
What is the UV index intensity in December in Estoril?
Average temperature in December
Estoril, Portugal
- Average high temperature in December: 15.5°C
The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in December: 12.5°C
The month with the highest average low temperature is August (18.8°C).
The coldest month (with the lowest average low temperature) is February (11.7°C).
Average pressure in December
Estoril, Portugal
- Average pressure in December: 1022.5mbar
The months with the highest atmospheric pressure are January and December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in December
Estoril, Portugal
- Average wind speed in December: 19.4km/h
The windiest month (with the highest average wind speed) is February (21.1km/h).
The calmest month (with the lowest average wind speed) is October (16.9km/h).
Average humidity in December
Estoril, Portugal
- Average humidity in December: 75%
The month with the highest relative humidity is July (77%).
The months with the lowest relative humidity are February, May, October and November (74%).
Average rainfall in December
Estoril, Portugal
- Average rainfall in December: 52mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in December
Estoril, Portugal
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is November (14.5 days).
The month with the least rainy days is August (1.7 days).
Average sea temperature in December
Estoril, Portugal
- Average sea temperature in December: 16.6°C
The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight in December /
Average sunshine in December
Estoril, Portugal
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Estoril, Portugal
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is November (13.4 days).
Average UV index in December
Estoril, Portugal
- Average UV index in December: 4
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in December
Estoril, Portugal
- Average cloud cover in December: 35
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Estoril, Portugal
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
