Lisbon
Portugal
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Lisbon, Portugal

The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle
The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle
December, the first month of the winter, in Lisbon, is still a mild month, with average temperature varying between 9.4°C (48.9°F) and 15.3°C (59.5°F).

Temperature

In Lisbon, the average high-temperature is relatively the same as in November - a moderate 15.3°C (59.5°F). In Lisbon, the average low-temperature is 9.4°C (48.9°F).

Rainfall

In December, the rain falls for 14 days. Throughout December, 126.7mm (4.99") of precipitation is accumulated. In Lisbon, Portugal, during the entire year, the rain falls for 112 days and collects up to 774mm (30.47") of precipitation.

Sea temperature

In December, the average sea temperature in Lisbon is 16.6°C (61.9°F).
Note: Swimming in 16.6°C (61.9°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

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

Sunshine

Months with the least sunshine are January, February, November and December, with an average of 5h of sunshine.

UV index

Months with the lowest UV index in Lisbon, Portugal, are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in December in Lisbon?

In December, in Lisbon, Portugal, the average high-temperature is 15.3°C (59.5°F), and the average low-temperature is 9.4°C (48.9°F).

How many days does it rain in December in Lisbon?

In December, the rain falls for 14 days. Throughout December, 126.7mm (4.99") of precipitation is accumulated.

How cold is the water in December in Lisbon?

In Lisbon, Portugal, in December, the average water temperature is 16.6°C (61.9°F). For most, swimming in 16.6°C (61.9°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

What is the month with the shortest days in Lisbon?

The month with the shortest days is December, with an average of 9.5h of daylight.

How many hours of daylight does Lisbon have in December?

The average length of the day in December in Lisbon, Portugal, is 9.5h.

What is the month with the least sunshine in Lisbon?

January, February, November and December, with an average of 5h of sunshine, are months with the least sunshine in Lisbon.

How many hours of sunshine does Lisbon have in December?

In December, the average sunshine in Lisbon is 5h.

What are the months with the lowest UV index in Lisbon?

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

What is the UV index intensity in December in Lisbon?

In December, the average daily maximum UV index in Lisbon, 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 - Lisbon, Portugal
  • Average high temperature in December: 15.3°C

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (14.8°C).

  • Average low temperature in December: 9.4°C

The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).

Average rainfall in December - Lisbon, Portugal
  • Average rainfall in December: 126.7mm

The wettest month (with the highest rainfall) is November (127.6mm).
The driest month (with the lowest rainfall) is July (4.2mm).

Average rainfall days in December - Lisbon, Portugal
  • Average rainfall days in December: 14 days

Months with the highest number of rainy days are January, February and December (14 days).
Months with the lowest number of rainy days are July and August (2 days).

Average sea temperature in December - Lisbon, Portugal
  • Average sea temperature in December: 16.6°C

The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).

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

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

  • Average sunshine in December: 5h

Months with most sunshine are July and August (Average sunshine: 11h).
Months with least sunshine are January, February, November and December (Average sunshine: 5).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).