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
December brings a marginal elevation to a moderate 15.5°C (59.9°F) from November's 17.1°C (62.8°F) in Ericeira's average high-temperatures. Ericeira's average nighttime temperature in December modestly descends to a cool 11.3°C (52.3°F).Humidity
In Ericeira, the average relative humidity in December is 76%.Rainfall
In Ericeira, in December, it is raining for 11.7 days, with typically 55mm (2.17") of accumulated precipitation. Throughout the year, there are 118 rainfall days, and 403mm (15.87") of precipitation is accumulated.Sea temperature
In Ericeira, Portugal, the average seawater temperature in December is 16.6°C (61.9°F).Note: Swimming in 16.6°C (61.9°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Ericeira.On the first day of December, sunrise is at 07:37 and sunset at 17:15. On the last day of the month, sunrise is at 07:56 and sunset at 17:25 WET.
Sunshine
In December, the average sunshine is 5.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during December translates into the following guidance:
Prioritize safety - Recommendations to avert sunburn are shared. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Ericeira?
What is the average humidity in December in Ericeira?
How many days does it rain in December in Ericeira?
What is the sea temperature in December in Ericeira?
What is the month with the shortest days in Ericeira?
How many hours of daylight does Ericeira have in December?
When is the sunrise / sunset in December in Ericeira?
How long on average sun shines in December in Ericeira?
What are the months with the lowest UV index in Ericeira?
What is the UV index intensity in December in Ericeira?
Average temperature in December
Ericeira, Portugal
- Average high temperature in December: 15.5°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in December: 11.3°C
The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is February (10°C).
Average pressure in December
Ericeira, Portugal
- Average pressure in December: 1022.5mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in December
Ericeira, Portugal
- Average wind speed in December: 16.9km/h
The windiest month (with the highest average wind speed) is February (18.7km/h).
The calmest month (with the lowest average wind speed) is October (15km/h).
Average humidity in December
Ericeira, Portugal
- Average humidity in December: 76%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are May, September and October (73%).
Average rainfall in December
Ericeira, Portugal
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is November (75mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days in December
Ericeira, Portugal
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is November (14.6 days).
The month with the least rainy days is August (2.6 days).
Average sea temperature in December
Ericeira, 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
Ericeira, Portugal
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in December
Ericeira, Portugal
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is July (26.4 days).
The month with the least sunshine days is November (12.8 days).
Average UV index in December
Ericeira, Portugal
- Average UV index in December: 4
The months with the highest UV index are June, July and 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
Ericeira, Portugal
- Average cloud cover in December: 37
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Ericeira, 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).
