December weather forecast and climate
Valhelhas, Portugal

Weather in December

The first month of the winter, December, is also a fresh month in Valhelhas, Portugal, with average temperature ranging between max 10.8°C (51.4°F) and min 3.4°C (38.1°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a still fresh 10.8°C (51.4°F). In December, the average low-temperature is 3.4°C (38.1°F).

Humidity

The average relative humidity in December is 82%.

Rainfall

December is the month with the most rainfall. Rain falls for 10.5 days and accumulates 83mm (3.27") of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Valhelhas, during December, snow falls for 2.4 days and regularly aggregates up to 43mm (1.69") of snow. Throughout the year, in Valhelhas, there are 15.4 snowfall days, and 244mm (9.61") of snow is accumulated.

Daylight

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

Sunshine

In Valhelhas, the average sunshine is 5.3h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. 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 Valhelhas?

In Valhelhas, in December, the average high-temperature is 10.8°C (51.4°F), and the average low-temperature is 3.4°C (38.1°F).

What is the average humidity in December in Valhelhas?

The average relative humidity in December is 82%.

How much does it rain in Valhelhas in December?

In Valhelhas, in December, it is raining for 10.5 days, with typically 83mm (3.27") of accumulated precipitation.

What is the wettest month in Valhelhas?

December is the month with the most rainfall. Rain falls for 10.5 days and accumulates 83mm (3.27") of precipitation.

How much does it snow in Valhelhas in December?

In December, it is snowing for 2.4 days. Throughout December, 43mm (1.69") of snow is accumulated.

What is the month with the shortest days in Valhelhas?

The month with the shortest days is December, with an average of 9.3h of daylight.

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

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

How long on average sun shines in December in Valhelhas?

In Valhelhas, the average sunshine in December is 5.3h.

When is the lowest UV index in Valhelhas?

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

What is the UV index reading in December in Valhelhas?

The average daily maximum UV index in December in Valhelhas, Portugal, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
Valhelhas, Portugal

Average temperature in December - Valhelhas, Portugal
  • Average high temperature in December: 10.8°C

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.8°C).

  • Average low temperature in December: 3.4°C

The month with the highest average low temperature is August (14.2°C).
The coldest month (with the lowest average low temperature) is January (2.3°C).

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Average pressure in December
Valhelhas, Portugal

Average pressure in December - Valhelhas, Portugal
  • Average pressure in December: 1023mbar

The month with the highest atmospheric pressure is December (1023mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).

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Average wind speed in December
Valhelhas, Portugal

Average wind speed in December - Valhelhas, Portugal
  • Average wind speed in December: 10.2km/h

The windiest month (with the highest average wind speed) is February (11.5km/h).
The calmest month (with the lowest average wind speed) is September (8.3km/h).

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Average humidity in December
Valhelhas, Portugal

Average humidity in December - Valhelhas, Portugal
  • Average humidity in December: 82%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (51%).

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Average rainfall in December
Valhelhas, Portugal

Average rainfall in December - Valhelhas, Portugal
  • Average rainfall in December: 83mm

The wettest month (with the highest rainfall) is December (83mm).
The driest months (with the least rainfall) are July and August (7mm).

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Average rainfall days in December
Valhelhas, Portugal

Average rainfall days in December - Valhelhas, Portugal
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is April (16.1 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in December
Valhelhas, Portugal

Average snowfall in December - Valhelhas, Portugal
  • Average snowfall in December: 43mm

The month with the highest snowfall is January (62mm).
Months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in December
Valhelhas, Portugal

Average snowfall days in December - Valhelhas, Portugal
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is January (4.2 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5.3h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is January (Average sunshine: 4.5h).

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Average sunshine days in December
Valhelhas, Portugal

Average sunshine days in December - Valhelhas, Portugal
  • Average sunshine days in December: 18.6 days

The month with the most sunshine days is August (27.5 days).
The month with the least sunshine days is April (12.7 days).

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Average UV index in December
Valhelhas, Portugal

Average UV index in December - Valhelhas, 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
Valhelhas, Portugal

Average cloud cover in December - Valhelhas, Portugal
  • Average cloud cover in December: 45

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 12).

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Average visibility in December
Valhelhas, Portugal

Average visibility in December - Valhelhas, Portugal
  • Average visibility in December: 8km

Months with the highest visibility are July and August (10km).
The month with the lowest visibility is January (7km).

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