December weather forecast and climate
Roalde, Portugal

Weather in December

December, the first month of the winter, in Roalde, is also a fresh month, with average temperature fluctuating between 3.2°C (37.8°F) and 10.1°C (50.2°F).

Temperature

In December, the average high-temperature is practically the same as in November - a still fresh 10.1°C (50.2°F). The average low-temperature, in Roalde, is 3.2°C (37.8°F).

Humidity

The average relative humidity in December is 85%.

Rainfall

December is the month with the most rainfall. Rain falls for 9.3 days and accumulates 49mm (1.93") of precipitation.

Snowfall

Months with snowfall in Roalde, Portugal, are January through March, November and December. In December, in Roalde, it is snowing for 0.5 days. Throughout December, 3mm (0.12") of snow is accumulated. In Roalde, Portugal, during the entire year, snow falls for 1.8 days, and aggregates up to 14mm (0.55") of snow.

Daylight

With an average of 9.3h of daylight, December has the shortest days of the year in Roalde.

Sunshine

The average sunshine in December is 4.9h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Roalde, Portugal. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Roalde?

In Roalde, in December, the average high-temperature is 10.1°C (50.2°F), and the average low-temperature is 3.2°C (37.8°F).

What is the average humidity in December in Roalde?

In Roalde, Portugal, the average relative humidity in December is 85%.

How many days does it rain in December in Roalde?

In Roalde, in December, it is raining for 9.3 days, with typically 49mm (1.93") of accumulated precipitation.

What is the rainiest month in Roalde?

December is the month with the most rainfall. Rain falls for 9.3 days and accumulates 49mm (1.93") of precipitation.

How many days does it snow in December in Roalde?

In Roalde, Portugal, in December, snow falls for 0.5 days, with typically accumulated 3mm (0.12") of snow.

What is the month with the shortest days in Roalde?

December has the shortest days of the year in Roalde, Portugal, with an average of 9.3h of daylight.

What is the average length of the day in December in Roalde?

In Roalde, Portugal, the average length of the day in December is 9.3h.

How long on average sun shines in December in Roalde?

In Roalde, the average sunshine in December is 4.9h.

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

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Roalde.

What is the UV index intensity in December in Roalde?

The average daily maximum UV index in December in Roalde, Portugal, is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.

Average temperature in December
Roalde, Portugal

Average temperature in December - Roalde, Portugal
  • Average high temperature in December: 10.1°C

The warmest month (with the highest average high temperature) is July (28.8°C).
The month with the lowest average high temperature is January (9.4°C).

  • Average low temperature in December: 3.2°C

The month with the highest average low temperature is July (14.1°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).

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Average pressure in December
Roalde, Portugal

Average pressure in December - Roalde, Portugal
  • Average pressure in December: 1022.8mbar

The month with the highest atmospheric pressure is December (1022.8mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).

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Average wind speed in December
Roalde, Portugal

Average wind speed in December - Roalde, Portugal
  • Average wind speed in December: 7.3km/h

The windiest month (with the highest average wind speed) is March (8.6km/h).
The calmest month (with the lowest average wind speed) is September (6.4km/h).

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Average humidity in December
Roalde, Portugal

Average humidity in December - Roalde, Portugal
  • Average humidity in December: 85%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (56%).

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Average rainfall in December
Roalde, Portugal

Average rainfall in December - Roalde, Portugal
  • Average rainfall in December: 49mm

The wettest month (with the highest rainfall) is December (49mm).
The driest month (with the least rainfall) is July (8mm).

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Average rainfall days in December
Roalde, Portugal

Average rainfall days in December - Roalde, Portugal
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is April (13.6 days).
The month with the least rainy days is August (3.9 days).

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Average snowfall in December
Roalde, Portugal

Average snowfall in December - Roalde, Portugal
  • Average snowfall in December: 3mm

The month with the highest snowfall is February (7mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in December
Roalde, Portugal

Average snowfall days in December - Roalde, Portugal
  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is February (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Roalde, Portugal
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 4.1h).

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Average sunshine days in December
Roalde, Portugal

Average sunshine days in December - Roalde, Portugal
  • Average sunshine days in December: 19.9 days

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is April (14.1 days).

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Average UV index in December
Roalde, Portugal

Average UV index in December - Roalde, Portugal
  • Average UV index in December: 2

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Roalde, Portugal

Average cloud cover in December - Roalde, Portugal
  • Average cloud cover in December: 51

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
Roalde, Portugal

Average visibility in December - Roalde, Portugal
  • Average visibility in December: 7km

Months with the highest visibility are June, July, August and September (9km).
The month with the lowest visibility is January (6km).

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