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
Alvor experiences a minor change to a still enjoyable 16.5°C (61.7°F) in average high-temperature during December, closely reflecting November. Nighttime temperature in Alvor, Portugal, reflects an average dip to a cool 12.8°C (55°F) in December, subtly cooler than its daytime highs.Humidity
The average relative humidity in December is 74%.Rainfall
In December, in Alvor, the rain falls for 2.5 days. Throughout December, 5mm (0.2") of precipitation is accumulated. Throughout the year, in Alvor, there are 25.8 rainfall days, and 32mm (1.26") of precipitation is accumulated.Sea temperature
In Alvor, the average seawater temperature in December is 17.4°C (63.3°F).Note: Swimming becomes less enjoyable for most at a surface water temperature of 17.4°C (63.3°F). As the temperature decreases below 21°C (69.8°F), breathing becomes increasingly difficult.
Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year in Alvor.On the first day of the month, sunrise is at 07:29 and sunset at 17:17. On the last day of December, in Alvor, sunrise is at 07:47 and sunset at 17:27 WET.
Sunshine
The average sunshine in December in Alvor is 6.4h.UV index
The months with the lowest UV index in Alvor are January through March, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 4 in December suggests the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
What are the temperatures in Alvor in December?
What is the average humidity in December in Alvor?
How many days does it rain in December in Alvor?
How cold is the water in December in Alvor?
What is the month with the shortest days in Alvor?
How many hours of daylight does Alvor have in December?
What time are sunrise and sunset in December in Alvor?
How many hours of sunshine does Alvor have in December?
When is the lowest UV index in Alvor?
What is the UV index reading in December in Alvor?
Average temperature in December
Alvor, Portugal
- Average high temperature in December: 16.5°C
The warmest month (with the highest average high temperature) is August (25.9°C).
The month with the lowest average high temperature is January (15.2°C).
- Average low temperature in December: 12.8°C
The month with the highest average low temperature is August (19.7°C).
The coldest month (with the lowest average low temperature) is February (11.3°C).
Average pressure in December
Alvor, 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 (1015.6mbar).
Average wind speed in December
Alvor, Portugal
- Average wind speed in December: 17.6km/h
The windiest month (with the highest average wind speed) is February (19.1km/h).
The calmest month (with the lowest average wind speed) is September (13.6km/h).
Average humidity in December
Alvor, Portugal
- Average humidity in December: 74%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is August (69%).
Average rainfall in December
Alvor, Portugal
- Average rainfall in December: 5mm
The wettest month (with the highest rainfall) is November (8mm).
The driest months (with the least rainfall) are June, July, August and September (0mm).
Average rainfall days in December
Alvor, Portugal
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is April (4.8 days).
The month with the least rainy days is August (0.2 days).
Average sea temperature in December
Alvor, Portugal
- Average sea temperature in December: 17.4°C
The best month for swimming (with the highest average sea temperature) is September (21.2°C).
The coldest month (with the lowest average sea temperature) is March (16°C).
Average daylight in December /
Average sunshine in December
Alvor, Portugal
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in December
Alvor, Portugal
- Average sunshine days in December: 27.5 days
The months with the most sunshine days are July and August (30.6 days).
The month with the least sunshine days is November (23.2 days).
Average UV index in December
Alvor, Portugal
- Average UV index in December: 4
The months with the highest UV index are 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
Alvor, Portugal
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 32).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in December
Alvor, 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).
Alvor, Portugal
Weather forecast for your location
2. Allow the app to use your location
