December weather forecast
Arregaca, Portugal

December

Weather in December

December, the first month of the winter in Arregaca, is still a refreshing month, with an average temperature varying between 6.5°C (43.7°F) and 14°C (57.2°F).

Temperature

Arregaca experiences an average high-temperature of a still refreshing 14°C (57.2°F) in December, marking an insignificant shift from 15.6°C (60.1°F) in November. Arregaca's temperature in December lowers to a consistent average of 6.5°C (43.7°F) during the nights.

Humidity

In Arregaca, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 11 days. Throughout December, 70mm (2.76") of precipitation is accumulated. In Arregaca, during the entire year, the rain falls for 119.4 days and collects up to 525mm (20.67") of precipitation.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 07:37 and sunset at 17:08. On the last day of December, sunrise is at 07:55 and sunset at 17:17 WET.

Sunshine

In December, the average sunshine is 5.7h.

UV index

The months with the lowest UV index in Arregaca are January through March, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 3 during December leads to these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.

Frequently asked questions

What is the average December temperature?
The high-temperature, in December, in Arregaca, records 14°C (57.2°F), while the low-temperature is 6.5°C (43.7°F). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 28°C (82.4°F).
What is the average humidity in December?
In December, the average relative humidity is 80%.
How much does it rain in December?
In Arregaca, in December, during 11 rainfall days, 70mm (2.76") of precipitation is typically accumulated.
What is the month with the shortest days?
The month with the shortest days in Arregaca is December, with an average of 9h and 24min of daylight.
What is the average length of the day in December?
In December, the average day length is 9h and 22min.
When is the sunrise / sunset in December?
On the first day of December, sunrise is at 07:37 and sunset at 17:08. On the last day of the month, sunrise is at 07:55 and sunset at 17:17 WET.
How many hours of sunshine does Arregaca have in December?
In December, the average sunshine duration is 5.7h.
When is the lowest UV index?
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
What is the UV index reading in December?
In Arregaca, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Arregaca, Portugal
  • Average high temperature in December: 14°C

The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (12.9°C).

  • Average low temperature in December: 6.5°C

The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is January (5.4°C).

Average pressure in December
Arregaca, 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
Arregaca, Portugal
  • Average wind speed in December: 8.4km/h

The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is September (7.2km/h).

Average humidity in December
Arregaca, Portugal
  • Average humidity in December: 80%

The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are August and September (65%).

Average rainfall in December
Arregaca, Portugal
  • Average rainfall in December: 70mm

The wettest month (with the highest rainfall) is November (77mm).
The driest month (with the least rainfall) is July (4mm).

Average rainfall days in December
Arregaca, Portugal
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is April (14.7 days).
The month with the least rainy days is August (2.8 days).

Average daylight in December /
Average sunshine in December
Arregaca, Portugal
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

Average sunshine days in December
Arregaca, Portugal
  • Average sunshine days in December: 18.9 days

The month with the most sunshine days is August (27.5 days).
The months with the least sunshine days are April and November (14.3 days).

Average UV index in December
Arregaca, Portugal
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 3).

Average cloud cover in December
Arregaca, Portugal
  • Average cloud cover in December: 41

The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 22).

Average visibility in December
Arregaca, Portugal
  • Average visibility in December: 9km

The months with the highest visibility are June, September, October and December (9km).
The months with the lowest visibility are January, February, March, April, May, July, August and November (8km).

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