December weather forecast and climate
Rolão, Portugal

Weather in December

December, the first month of the winter, in Rolão, is also a moderate month, with temperature in the range of an average low of 7.1°C (44.8°F) and an average high of 15.5°C (59.9°F).

Temperature

In December, the average high-temperature is almost the same as in November - a mild 15.5°C (59.9°F). In Rolão, the average low-temperature is 7.1°C (44.8°F).

Humidity

In December, the average relative humidity in Rolão is 77%.

Rainfall

In Rolão, it is raining for 5.5 days, with typically 11mm (0.43") of accumulated precipitation. In Rolão, during the entire year, the rain falls for 65.2 days and collects up to 110mm (4.33") of precipitation.

Daylight

With an average of 9.6h of daylight, December has the shortest days of the year.

Sunshine

In Rolão, the average sunshine is 6h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in December in Rolão?

The average high-temperature, in December, is 15.5°C (59.9°F), while the average low-temperature is 7.1°C (44.8°F).

What is the average humidity in December in Rolão?

In Rolão, Portugal, the average relative humidity in December is 77%.

How many days does it rain in December in Rolão?

In Rolão, during December, the rain falls for 5.5 days and regularly aggregates up to 11mm (0.43") of precipitation.

What is the month with the shortest days in Rolão?

December has the shortest days of the year in Rolão, with an average of 9.6h of daylight.

How many hours of daylight does Rolão have in December?

In December, the average length of the day is 9.6h.

How long on average sun shines in December in Rolão?

In Rolão, the average sunshine in December is 6h.

What is the month with the lowest UV index in Rolão?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Rolão?

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

Average temperature in December
Rolão, Portugal

Average temperature in December - Rolão, Portugal
  • Average high temperature in December: 15.5°C

The warmest month (with the highest average high temperature) is August (34.7°C).
The month with the lowest average high temperature is January (14.4°C).

  • Average low temperature in December: 7.1°C

The month with the highest average low temperature is August (17.8°C).
The coldest month (with the lowest average low temperature) is February (5.3°C).

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Average pressure in December
Rolão, Portugal

Average pressure in December - Rolão, 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).

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Average wind speed in December
Rolão, Portugal

Average wind speed in December - Rolão, Portugal
  • Average wind speed in December: 10.7km/h

The windiest month (with the highest average wind speed) is July (11.9km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).

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Average humidity in December
Rolão, Portugal

Average humidity in December - Rolão, Portugal
  • Average humidity in December: 77%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in December
Rolão, Portugal

Average rainfall in December - Rolão, Portugal
  • Average rainfall in December: 11mm

The wettest month (with the highest rainfall) is April (20mm).
The driest months (with the least rainfall) are July and August (1mm).

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Average rainfall days in December
Rolão, Portugal

Average rainfall days in December - Rolão, Portugal
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is April (9.7 days).
The month with the least rainy days is August (1 days).

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

Average daylight in December / Average sunshine in December - Rolão, Portugal
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 6h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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Average sunshine days in December
Rolão, Portugal

Average sunshine days in December - Rolão, Portugal
  • Average sunshine days in December: 23.7 days

The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is April (18.8 days).

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Average UV index in December
Rolão, Portugal

Average UV index in December - Rolão, Portugal
  • Average UV index in December: 3

Months with the highest UV index are July and August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in December
Rolão, Portugal

Average cloud cover in December - Rolão, Portugal
  • Average cloud cover in December: 34

Months with the most cloud cover are January and April (Cloud cover 40).
Months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in December
Rolão, Portugal

Average visibility in December - Rolão, Portugal
  • Average visibility in December: 9km

Months with the highest visibility are June, July, August and September (10km).
Months with the lowest visibility are January, February, March, April, May, October, November and December (9km).

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