December weather forecast and climate
Ribeira Da Janela, Portugal

Weather in December

December, the first month of the winter, in Ribeira Da Janela, is also an enjoyable month, with average temperature fluctuating between 17.5°C (63.5°F) and 18.7°C (65.7°F).

Temperature

In December, the average high-temperature is almost the same as in November - an enjoyable 18.7°C (65.7°F). In December, the average low-temperature is 17.5°C (63.5°F).

Humidity

In December, the average relative humidity in Ribeira Da Janela is 74%.

Rainfall

In Ribeira Da Janela, during December, the rain falls for 13.4 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, there are 116.4 rainfall days, and 232mm (9.13") of precipitation is accumulated.

Daylight

The month with the shortest days in Ribeira Da Janela is December, with an average of 10h of daylight.

Sunshine

January and December, with an average of 7.6h of sunshine, are months with the least sunshine in Ribeira Da Janela, Portugal.

UV index

January through June, November and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in December in Ribeira Da Janela?

In December, in Ribeira Da Janela, the average high-temperature is 18.7°C (65.7°F), and the average low-temperature is 17.5°C (63.5°F).

What is the average humidity in December in Ribeira Da Janela?

In Ribeira Da Janela, Portugal, the average relative humidity in December is 74%.

How much does it rain in Ribeira Da Janela in December?

In Ribeira Da Janela, during December, the rain falls for 13.4 days and regularly aggregates up to 27mm (1.06") of precipitation.

What is the month with the shortest days in Ribeira Da Janela?

December has the shortest days of the year in Ribeira Da Janela, Portugal, with an average of 10h of daylight.

What is the average length of the day in December in Ribeira Da Janela?

In December, the average length of the day is 10h.

What is the month with the least sunshine in Ribeira Da Janela?

Months with the least sunshine in Ribeira Da Janela are January and December, with an average of 7.6h of sunshine.

How many hours of sunshine does Ribeira Da Janela have in December?

The average sunshine in December in Ribeira Da Janela is 7.6h.

What are the months with the lowest UV index in Ribeira Da Janela?

January through June, November and December, with an average maximum UV index of 5, are months with the lowest UV index in Ribeira Da Janela.

What is the UV index reading in December in Ribeira Da Janela?

In Ribeira Da Janela, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Ribeira Da Janela, Portugal

Average temperature in December - Ribeira Da Janela, Portugal
  • Average high temperature in December: 18.7°C

The warmest month (with the highest average high temperature) is August (23°C).
Months with the lowest average high temperature are February and March (16.9°C).

  • Average low temperature in December: 17.5°C

The month with the highest average low temperature is September (21.7°C).
The coldest month (with the lowest average low temperature) is March (15.1°C).

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Average pressure in December
Ribeira Da Janela, Portugal

Average pressure in December - Ribeira Da Janela, Portugal
  • Average pressure in December: 1022.4mbar

The month with the highest atmospheric pressure is January (1024.1mbar).
The month with the lowest atmospheric pressure is October (1017mbar).

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Average wind speed in December
Ribeira Da Janela, Portugal

Average wind speed in December - Ribeira Da Janela, Portugal
  • Average wind speed in December: 22.3km/h

The windiest month (with the highest average wind speed) is February (23km/h).
The calmest month (with the lowest average wind speed) is September (17.7km/h).

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Average humidity in December
Ribeira Da Janela, Portugal

Average humidity in December - Ribeira Da Janela, Portugal
  • Average humidity in December: 74%

Months with the highest relative humidity are June and August (80%).
The month with the lowest relative humidity is February (73%).

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Average rainfall in December
Ribeira Da Janela, Portugal

Average rainfall in December - Ribeira Da Janela, Portugal
  • Average rainfall in December: 27mm

The wettest month (with the highest rainfall) is October (44mm).
The driest month (with the least rainfall) is August (3mm).

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Average rainfall days in December
Ribeira Da Janela, Portugal

Average rainfall days in December - Ribeira Da Janela, Portugal
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is August (3.9 days).

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Average daylight in December /
Average sunshine in December
Ribeira Da Janela, Portugal

Average daylight in December / Average sunshine in December - Ribeira Da Janela, Portugal
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 7.6h

The month with the most sunshine is June (Average sunshine: 9.2h).
Months with the least sunshine are January and December (Average sunshine: 7.6).

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Average sunshine days in December
Ribeira Da Janela, Portugal

Average sunshine days in December - Ribeira Da Janela, Portugal
  • Average sunshine days in December: 12 days

The month with the most sunshine days is August (20.9 days).
The month with the least sunshine days is November (8.4 days).

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Average UV index in December
Ribeira Da Janela, Portugal

Average UV index in December - Ribeira Da Janela, Portugal
  • Average UV index in December: 5

Months with the highest UV index are July, August, September and October (UV index 6).
Months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 5).

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Average cloud cover in December
Ribeira Da Janela, Portugal

Average cloud cover in December - Ribeira Da Janela, Portugal
  • Average cloud cover in December: 39

The month with the most cloud cover is November (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in December
Ribeira Da Janela, Portugal

Average visibility in December - Ribeira Da Janela, Portugal
  • Average visibility in December: 10km

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

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