December weather forecast and climate
São Francisco, Portugal

Weather in December

December, the first month of the winter, in São Francisco, is still a mild month, with temperature in the range of an average low of 10.1°C (50.2°F) and an average high of 15.7°C (60.3°F).

Temperature

In December, the average high-temperature is practically the same as in November - a moderate 15.7°C (60.3°F). In São Francisco, the average low-temperature is 10.1°C (50.2°F).

Humidity

In December, the average relative humidity in São Francisco, Portugal, is 76%.

Rainfall

In December, in São Francisco, the rain falls for 8.5 days. Throughout December, 22mm (0.87") of precipitation is accumulated. Throughout the year, in São Francisco, Portugal, there are 78.2 rainfall days, and 171mm (6.73") of precipitation is accumulated.

Daylight

December has the shortest days of the year in São Francisco, Portugal, with an average of 9.5h of daylight.

Sunshine

In São Francisco, the average sunshine in December is 5.9h.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index in São Francisco. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. 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 São Francisco?

In December, in São Francisco, the average high-temperature is 15.7°C (60.3°F), and the average low-temperature is 10.1°C (50.2°F).

What is the average humidity in December in São Francisco?

In December, the average relative humidity in São Francisco is 76%.

How many days does it rain in December in São Francisco?

In São Francisco, in December, during 8.5 rainfall days, 22mm (0.87") of precipitation is typically accumulated.

What is the month with the shortest days in São Francisco?

With an average of 9.5h of daylight, December has the shortest days of the year in São Francisco.

What is the average length of the day in December in São Francisco?

In December, the average length of the day is 9.5h.

How many hours of sunshine does São Francisco have in December?

In December, the average sunshine in São Francisco, Portugal, is 5.9h.

When is the lowest UV index in São Francisco?

The month with the lowest UV index is December, with an average maximum UV index of 3.

What is the UV index reading in December in São Francisco?

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

Average temperature in December
São Francisco, Portugal

Average temperature in December - São Francisco, Portugal
  • Average high temperature in December: 15.7°C

The warmest month (with the highest average high temperature) is August (28.5°C).
The month with the lowest average high temperature is January (14.8°C).

  • Average low temperature in December: 10.1°C

Months with the highest average low temperature are July and August (17.3°C).
The coldest month (with the lowest average low temperature) is February (9°C).

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Average pressure in December
São Francisco, Portugal

Average pressure in December - São Francisco, Portugal
  • Average pressure in December: 1022.6mbar

The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).

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Average wind speed in December
São Francisco, Portugal

Average wind speed in December - São Francisco, Portugal
  • Average wind speed in December: 13.6km/h

The windiest month (with the highest average wind speed) is February (15km/h).
The calmest month (with the lowest average wind speed) is September (11.8km/h).

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Average humidity in December
São Francisco, Portugal

Average humidity in December - São Francisco, Portugal
  • Average humidity in December: 76%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (66%).

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Average rainfall in December
São Francisco, Portugal

Average rainfall in December - São Francisco, Portugal
  • Average rainfall in December: 22mm

The wettest month (with the highest rainfall) is November (34mm).
The driest months (with the least rainfall) are July and August (2mm).

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Average rainfall days in December
São Francisco, Portugal

Average rainfall days in December - São Francisco, Portugal
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is April (11 days).
The month with the least rainy days is August (1.6 days).

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Average daylight in December /
Average sunshine in December
São Francisco, Portugal

Average daylight in December / Average sunshine in December - São Francisco, Portugal
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.9h

The month with the most sunshine is July (Average sunshine: 11.3h).
The month with the least sunshine is January (Average sunshine: 5.3h).

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Average sunshine days in December
São Francisco, Portugal

Average sunshine days in December - São Francisco, Portugal
  • Average sunshine days in December: 22.1 days

The month with the most sunshine days is August (28 days).
The month with the least sunshine days is April (17.2 days).

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Average UV index in December
São Francisco, Portugal

Average UV index in December - São Francisco, Portugal
  • Average UV index in December: 3

Months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
São Francisco, Portugal

Average cloud cover in December - São Francisco, Portugal
  • Average cloud cover in December: 35

The month with the most cloud cover is January (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in December
São Francisco, Portugal

Average visibility in December - São Francisco, 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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