December weather forecast and climate
Olalhas, Portugal

Weather in December

December, the first month of the winter, in Olalhas, is still a mild month, with average temperature fluctuating between 14.3°C (57.7°F) and 6.8°C (44.2°F).

Temperature

In December, the average high-temperature is almost the same as in November - a mild 14.3°C (57.7°F). In December, the average low-temperature is 6.8°C (44.2°F).

Humidity

In December, the average relative humidity in Olalhas is 79%.

Rainfall

In Olalhas, during December, the rain falls for 7.3 days and regularly aggregates up to 38mm (1.5") of precipitation. Throughout the year, in Olalhas, Portugal, there are 94.6 rainfall days, and 345mm (13.58") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine in Olalhas is 5.5h.

UV index

Months with the lowest UV index in Olalhas, Portugal, are January, February, November and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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.
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FAQ

What is the temperature in December in Olalhas?

In December, in Olalhas, the average high-temperature is 14.3°C (57.7°F), and the average low-temperature is 6.8°C (44.2°F).

What is the average humidity in December in Olalhas?

In Olalhas, Portugal, the average relative humidity in December is 79%.

How many days does it rain in December in Olalhas?

In Olalhas, Portugal, in December, during 7.3 rainfall days, 38mm (1.5") of precipitation is typically accumulated.

What is the month with the shortest days in Olalhas?

The month with the shortest days is December, with an average of 9.4h of daylight.

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

In December, the average length of the day in Olalhas, Portugal, is 9.4h.

How long on average sun shines in December in Olalhas?

The average sunshine in December is 5.5h.

When is the lowest UV index in Olalhas?

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

How high is the UV index in December in Olalhas?

In Olalhas, Portugal, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in December
Olalhas, Portugal

Average temperature in December - Olalhas, Portugal
  • Average high temperature in December: 14.3°C

The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (13.4°C).

  • Average low temperature in December: 6.8°C

Months with the highest average low temperature are July and August (15.3°C).
The coldest month (with the lowest average low temperature) is January (5.8°C).

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Average pressure in December
Olalhas, Portugal

Average pressure in December - Olalhas, 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
Olalhas, Portugal

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

The windiest month (with the highest average wind speed) is July (12.2km/h).
The calmest month (with the lowest average wind speed) is September (9.7km/h).

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Average humidity in December
Olalhas, Portugal

Average humidity in December - Olalhas, Portugal
  • Average humidity in December: 79%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (60%).

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Average rainfall in December
Olalhas, Portugal

Average rainfall in December - Olalhas, Portugal
  • Average rainfall in December: 38mm

The wettest month (with the highest rainfall) is April (54mm).
The driest month (with the least rainfall) is July (2mm).

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Average rainfall days in December
Olalhas, Portugal

Average rainfall days in December - Olalhas, Portugal
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is April (14.1 days).
The month with the least rainy days is August (2.3 days).

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

Average daylight in December / Average sunshine in December - Olalhas, Portugal
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5.5h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 5h).

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Average sunshine days in December
Olalhas, Portugal

Average sunshine days in December - Olalhas, Portugal
  • Average sunshine days in December: 23 days

The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is April (14.6 days).

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Average UV index in December
Olalhas, Portugal

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

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

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Average cloud cover in December
Olalhas, Portugal

Average cloud cover in December - Olalhas, Portugal
  • Average cloud cover in December: 39

The month with the most cloud cover is January (Cloud cover 45).
Months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in December
Olalhas, Portugal

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

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

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