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
Weather in December
Temperature
Arrentela's weather, upon December's arrival, documents an average high-temperature of a still refreshing 15.7°C (60.3°F), nearly identical to the prior month. During the nights of December, Arrentela maintains an almost steady temperature with an average low of 10.9°C (51.6°F).Humidity
The average relative humidity in December is 75%.Rainfall
In Arrentela, in December, it is raining for 5.1 days, with typically 8mm (0.31") of accumulated precipitation. In Arrentela, during the entire year, the rain falls for 54.2 days and collects up to 61mm (2.4") of precipitation.Sea temperature
In Arrentela, in December, the average water temperature is 16.6°C (61.9°F).Note: Swimming in 16.6°C (61.9°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 07:35 and sunset at 17:15. On the last day of December, in Arrentela, sunrise is at 07:54 and sunset at 17:25 WET.
Sunshine
In December, the average sunshine in Arrentela is 5.9h.UV index
The months with the lowest UV index in Arrentela are January through March, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 during December translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. It's recommended to limit sun exposure when its radiation is at its peak during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What are the temperatures in Arrentela in December?
What is the average humidity in December in Arrentela?
How many days does it rain in December in Arrentela?
How cold is the water in December in Arrentela?
What is the month with the shortest days in Arrentela?
How many hours of daylight does Arrentela have in December?
When is the sunrise / sunset in December in Arrentela?
How long on average sun shines in December in Arrentela?
What is the month with the lowest UV index in Arrentela?
What is the UV index reading in December in Arrentela?
Average temperature in December
Arrentela, Portugal
- Average high temperature in December: 15.7°C
The warmest month (with the highest average high temperature) is August (27.1°C).
The month with the lowest average high temperature is January (14.9°C).
- Average low temperature in December: 10.9°C
The month with the highest average low temperature is July (17.9°C).
The coldest month (with the lowest average low temperature) is February (9.8°C).
Average pressure in December
Arrentela, Portugal
- Average pressure in December: 1022.6mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in December
Arrentela, Portugal
- Average wind speed in December: 15km/h
The windiest month (with the highest average wind speed) is February (16.5km/h).
The calmest month (with the lowest average wind speed) is September (13.1km/h).
Average humidity in December
Arrentela, Portugal
- Average humidity in December: 75%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Arrentela, Portugal
- Average rainfall in December: 8mm
The wettest month (with the highest rainfall) is November (15mm).
The driest months (with the least rainfall) are June, July and August (1mm).
Average rainfall days in December
Arrentela, Portugal
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is November (9.3 days).
The month with the least rainy days is August (0.8 days).
Average sea temperature in December
Arrentela, 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
Arrentela, 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: 5h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Arrentela, Portugal
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is November (17.7 days).
Average UV index in December
Arrentela, Portugal
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August and September (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
Arrentela, Portugal
- Average cloud cover in December: 34
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Arrentela, 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).
Arrentela, Portugal
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