December weather forecastVale, Portugal

December

Weather in December

December, the first month of the winter in Vale, is still a cool month, with temperature in the range of an average high of 12.8°C (55°F) and an average low of 5.6°C (42.1°F).

Temperature

The commencement of December records an average high-temperature of a fresh 12.8°C (55°F), barely varying from November's 14.5°C (58.1°F). During the month of December, the nighttime temperature falls to an average of 5.6°C (42.1°F).

Humidity

The average relative humidity in December is 81%.

Rainfall

In Vale, during December, the rain falls for 11.6 days and regularly aggregates up to 89mm (3.5") of precipitation. In Vale, during the entire year, the rain falls for 127.7 days and collects up to 618mm (24.33") of precipitation.

Snowfall

In Vale, snow does not fall in May through October and December.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 07:39 and sunset at 17:06. On the last day of December, in Vale, Portugal, sunrise is at 07:58 and sunset at 17:15 WET.

Sunshine

In December, the average sunshine is 5.6h.

UV index

The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 3 suggests these recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.

Updated: Aug 21, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In December, the average high-temperature and low-temperature are 12.8°C (55°F) and 5.6°C (42.1°F) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 31°C (87.8°F).

In December, the average relative humidity is 81%.

In Vale, in December, it is raining for 11.6 days, with typically 89mm (3.5") of accumulated precipitation.

In Vale, snow does not fall in May through October and December.

In December, it doesn't snow. November is the latest month when it typically snows.

December has the shortest days of the year, with an average of 9h and 18min of daylight.

The average day length in December is 9h and 17min.

On the first day of December, sunrise is at 07:39 and sunset at 17:06. On the last day of the month, sunrise is at 07:58 and sunset at 17:15 WET.

In Vale, the average sunshine duration in December is 5.6h.

In Vale, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

14.5°C

12.8°C

12°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.2km/h

9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

13.5

17.7

14.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Vale, Portugal

Average high temperature in December: 12.8°C

The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (12°C).

Average low temperature in December: 5.6°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (4.3°C).

Average pressure in December
Vale, 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 (1015.3mbar).

Average wind speed in December
Vale, Portugal

Average wind speed in December: 8.4km/h

The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is September (7km/h).

Average humidity in December
Vale, Portugal

Average humidity in December: 81%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (62%).

Average rainfall in December
Vale, Portugal

Average rainfall in December: 89mm

The wettest month (with the highest rainfall) is November (96mm).
The driest month (with the least rainfall) is July (6mm).

Average rainfall days in December
Vale, Portugal

Average rainfall days in December: 11.6 days

The months with the highest number of rainy days are January and April (14.7 days).
The month with the least rainy days is August (3.9 days).

Average snowfall in December
Vale, Portugal

Average snowfall in December: 0mm

The months with the highest snowfall are January and March (2mm).
The months with the least snowfall are May, June, July, August, September, October and December (0mm).

Average snowfall days in December
Vale, Portugal

Average snowfall days in December: 0 days

The months with the highest number of snowfall days are January, February and March (0.3 days).
The months with the least snowfall days are May, June, July, August, September, October and December (0 days).

Average daylight in December /
Average sunshine in December
Vale, Portugal

Average daylight in December: 9h and 18min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in December: 5h and 36min

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 0min).