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, Oeiras notes an average high-temperature of a still refreshing 15.7°C (60.3°F), closely following the trend of the preceding month. Oeiras's nights in December maintain a consistent average of 12°C (53.6°F), demonstrating a minimal differential from its daytime temperature.Humidity
January, April, July and December, with an average relative humidity of 75%, are the most humid months in Oeiras.Rainfall
In December, in Oeiras, the rain falls for 8.3 days. Throughout December, 29mm (1.14") of precipitation is accumulated. In Oeiras, Portugal, during the entire year, the rain falls for 85.8 days and collects up to 215mm (8.46") of precipitation.Daylight
December has the shortest days of the year in Oeiras, Portugal, with an average of 9h and 30min of daylight.On the first day of December in Oeiras, sunrise is at 07:36 and sunset at 17:16. On the last day of the month, sunrise is at 07:55 and sunset at 17:25 WET.
Sunshine
In Oeiras, Portugal, the average sunshine in December is 6h.UV index
The months with the lowest UV index in Oeiras are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 4 in December interprets into the following advice:
Take precautions - Protection against sun damage is advised. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What is the temperature in December in Oeiras?
What are the most humid months in Oeiras?
What is the average humidity in December in Oeiras?
How many days does it rain in December in Oeiras?
What is the month with the shortest days in Oeiras?
How many hours of daylight does Oeiras have in December?
When are sunrise and sunset in December in Oeiras?
How many hours of sunshine does Oeiras have in December?
What are the months with the lowest UV index in Oeiras?
How high is the UV index in December in Oeiras?
Average temperature in December
Oeiras, Portugal
- Average high temperature in December: 15.7°C
The warmest month (with the highest average high temperature) is August (24.5°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in December: 12°C
The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).
Average pressure in December
Oeiras, Portugal
- Average pressure in December: 1022.5mbar
The months with the highest atmospheric pressure are January and December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in December
Oeiras, Portugal
- Average wind speed in December: 17.9km/h
The windiest month (with the highest average wind speed) is February (19.5km/h).
The calmest month (with the lowest average wind speed) is October (15.6km/h).
Average humidity in December
Oeiras, Portugal
- Average humidity in December: 75%
The months with the highest relative humidity are January, April, July and December (75%).
The months with the lowest relative humidity are May and October (72%).
Average rainfall in December
Oeiras, Portugal
- Average rainfall in December: 29mm
The wettest month (with the highest rainfall) is November (44mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in December
Oeiras, Portugal
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is November (12.4 days).
The month with the least rainy days is August (1.9 days).
Average daylight in December /
Average sunshine in December
Oeiras, 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: 6h and 0min
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 30min).
Average sunshine days in December
Oeiras, Portugal
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is August (28 days).
The month with the least sunshine days is November (15.6 days).
Average UV index in December
Oeiras, 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
Oeiras, 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
Oeiras, 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).
Oeiras, Portugal
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