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 introduction of December notes a subtle temperature variation to a moderate 14.4°C (57.9°F) from November's 16.6°C (61.9°F). An average low-temperature of 6.9°C (44.4°F) marks the nights in Casais Robustos, Portugal throughout December.Humidity
In Casais Robustos, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 10.2 days. Throughout December, 52mm (2.05") of precipitation is accumulated. In Casais Robustos, during the entire year, the rain falls for 113.2 days and collects up to 426mm (16.77") of precipitation.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Casais Robustos.On the first day of December, sunrise is at 07:36 and sunset at 17:11. On the last day of the month, sunrise is at 07:54 and sunset at 17:20 WET.
Sunshine
In December, the average sunshine is 5.4h.UV index
The months with the lowest UV index in Casais Robustos are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 3 in December translates into these instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Casais Robustos?
What is the average humidity in December in Casais Robustos?
How many days does it rain in December in Casais Robustos?
What is the month with the shortest days in Casais Robustos?
What is the average length of the day in December in Casais Robustos?
When is the sunrise / sunset in December in Casais Robustos?
How many hours of sunshine does Casais Robustos have in December?
When is the lowest UV index in Casais Robustos?
What is the UV index reading in December in Casais Robustos?
Average temperature in December
Casais Robustos, Portugal
- Average high temperature in December: 14.4°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (13.7°C).
- Average low temperature in December: 6.9°C
The month with the highest average low temperature is July (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (6.2°C).
Average pressure in December
Casais Robustos, Portugal
- Average pressure in December: 1022.7mbar
The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in December
Casais Robustos, Portugal
- Average wind speed in December: 10.9km/h
The windiest month (with the highest average wind speed) is July (13.3km/h).
The calmest month (with the lowest average wind speed) is October (10.5km/h).
Average humidity in December
Casais Robustos, 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 (61%).
Average rainfall in December
Casais Robustos, Portugal
- Average rainfall in December: 52mm
The wettest month (with the highest rainfall) is November (66mm).
The driest months (with the least rainfall) are July and August (4mm).
Average rainfall days in December
Casais Robustos, Portugal
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is April (14.3 days).
The month with the least rainy days is August (3 days).
Average daylight in December /
Average sunshine in December
Casais Robustos, Portugal
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 2min
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 54min).
Average sunshine days in December
Casais Robustos, Portugal
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is April (14 days).
Average UV index in December
Casais Robustos, Portugal
- Average UV index in December: 3
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, November and December (UV index 3).
Average cloud cover in December
Casais Robustos, Portugal
- Average cloud cover in December: 41
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
Casais Robustos, Portugal
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
Casais Robustos, Portugal
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