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 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
The advent of December signifies a minor shift to an average high-temperature of a still refreshing 15.7°C (60.3°F), aligning closely with November. Alfama upholds a consistent average temperature of 10.9°C (51.6°F) throughout the nights of December.Humidity
The average relative humidity in December is 75%.Rainfall
In December, in Alfama, the rain falls for 5.1 days. Throughout December, 8mm (0.31") of precipitation is accumulated. In Alfama, during the entire year, the rain falls for 54.4 days and collects up to 62mm (2.44") of precipitation.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Alfama.On the first day of December, sunrise is at 07:36 and sunset at 17:15. On the last day of the month, sunrise is at 07:54 and sunset at 17:25 WET.
Sunshine
In December, the average sunshine in Alfama is 5.9h.UV index
The months with the lowest UV index in Alfama, Portugal, are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in December converts into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What are the temperatures in Alfama in December?
What is the average humidity in December in Alfama?
How much does it rain in Alfama in December?
What is the month with the shortest days in Alfama?
What is the average length of the day in December in Alfama?
When is the sunrise / sunset in December in Alfama?
How long on average sun shines in December in Alfama?
What are the months with the lowest UV index in Alfama?
What is the UV index intensity in December in Alfama?
Average temperature in December
Alfama, 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
Alfama, 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
Alfama, 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 (13km/h).
Average humidity in December
Alfama, 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
Alfama, 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
Alfama, 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 daylight in December /
Average sunshine in December
Alfama, 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
Alfama, 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
Alfama, 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
Alfama, 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
Alfama, 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).
Alfama, Portugal
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