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
With December's arrival, Ribeira, Portugal, notes an average high-temperature of a still refreshing 13.5°C (56.3°F), closely following the trend of the preceding month. An average low-temperature of 9.8°C (49.6°F), slightly less than the daytime peak, marks the month of December.Humidity
The average relative humidity in December is 80%.Rainfall
In December, in Ribeira, Portugal, the rain falls for 14.6 days. Throughout December, 112mm (4.41") of precipitation is accumulated. In Ribeira, during the entire year, the rain falls for 144.8 days and collects up to 905mm (35.63") of precipitation.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Ribeira.On the first day of December, sunrise is at 07:42 and sunset at 17:04. On the last day of the month, sunrise is at 08:01 and sunset at 17:13 WET.
Sunshine
The average sunshine in December is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Ribeira. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 3 during December leads to these advisories:
Undertake precautions - Guarding against sun damage is counselled. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What are the temperatures in Ribeira in December?
What is the average humidity in December in Ribeira?
How many days does it rain in December in Ribeira?
What is the month with the shortest days in Ribeira?
How many hours of daylight does Ribeira have in December?
When is the sunrise / sunset in December in Ribeira?
How many hours of sunshine does Ribeira have in December?
What is the month with the lowest UV index in Ribeira?
How high is the UV index in December in Ribeira?
Average temperature in December
Ribeira, Portugal
- Average high temperature in December: 13.5°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (12.8°C).
- Average low temperature in December: 9.8°C
The month with the highest average low temperature is August (16.5°C).
The coldest month (with the lowest average low temperature) is February (8.6°C).
Average pressure in December
Ribeira, Portugal
- Average pressure in December: 1022.2mbar
The month with the highest atmospheric pressure is December (1022.2mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Ribeira, Portugal
- Average wind speed in December: 15.5km/h
The windiest month (with the highest average wind speed) is February (16.8km/h).
The calmest month (with the lowest average wind speed) is September (12.3km/h).
Average humidity in December
Ribeira, Portugal
- Average humidity in December: 80%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (74%).
Average rainfall in December
Ribeira, Portugal
- Average rainfall in December: 112mm
The wettest month (with the highest rainfall) is November (147mm).
The driest month (with the least rainfall) is July (11mm).
Average rainfall days in December
Ribeira, Portugal
- Average rainfall days in December: 14.6 days
The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is August (5.8 days).
Average daylight in December /
Average sunshine in December
Ribeira, Portugal
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Ribeira, Portugal
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is August (24.1 days).
The month with the least sunshine days is November (11.5 days).
Average UV index in December
Ribeira, Portugal
- Average UV index in December: 3
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Ribeira, Portugal
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 19).
Average visibility in December
Ribeira, Portugal
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, September, October and December (10km).
The months with the lowest visibility are January, August and November (9km).
Ribeira, Portugal
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