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
December ushers in an average high-temperature of a still refreshing 14.5°C (58.1°F), aligning closely with the preceding month. Throughout the month of December, Viana do Alentejo sees a steady low-temperature average of 6.6°C (43.9°F).Humidity
In Viana do Alentejo, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 34mm (1.34") of precipitation is accumulated. Throughout the year, in Viana do Alentejo, there are 95.6 rainfall days, and 308mm (12.13") of precipitation is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Viana do Alentejo.On the first day of December, sunrise is at 07:30 and sunset at 17:11. On the last day of the month, sunrise is at 07:48 and sunset at 17:21 WET.
Sunshine
The average sunshine in December in Viana do Alentejo is 5.6h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Viana do Alentejo. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What are the temperatures in Viana do Alentejo in December?
What is the average humidity in December in Viana do Alentejo?
How much does it rain in Viana do Alentejo in December?
What is the month with the shortest days in Viana do Alentejo?
How many hours of daylight does Viana do Alentejo have in December?
What time are sunrise and sunset in December in Viana do Alentejo?
How many hours of sunshine does Viana do Alentejo have in December?
What is the month with the lowest UV index in Viana do Alentejo?
How high is the UV index in December in Viana do Alentejo?
Average temperature in December
Viana do Alentejo, Portugal
- Average high temperature in December: 14.5°C
The warmest month (with the highest average high temperature) is August (33.7°C).
The month with the lowest average high temperature is January (13.7°C).
- Average low temperature in December: 6.6°C
The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (5.2°C).
Average pressure in December
Viana do Alentejo, Portugal
- Average pressure in December: 1022.8mbar
The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Viana do Alentejo, Portugal
- Average wind speed in December: 11.1km/h
The windiest months (with the highest average wind speed) are February and March (12km/h).
The calmest month (with the lowest average wind speed) is September (9.5km/h).
Average humidity in December
Viana do Alentejo, Portugal
- Average humidity in December: 79%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (49%).
Average rainfall in December
Viana do Alentejo, Portugal
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is April (52mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in December
Viana do Alentejo, Portugal
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is August (2 days).
Average daylight in December /
Average sunshine in December
Viana do Alentejo, 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 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Viana do Alentejo, Portugal
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is July (28.8 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in December
Viana do Alentejo, Portugal
- Average UV index in December: 3
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Viana do Alentejo, Portugal
- Average cloud cover in December: 38
The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Viana do Alentejo, Portugal
- Average visibility in December: 9km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January and April (8km).
Viana do Alentejo, Portugal
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