Reykjavík
Iceland
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Reykjavík, Iceland

The city buildings of Reykjavík, the capital city of Iceland, with a view of the sea, and a mountain with a snowy peak in the far distance
The city buildings of Reykjavík, the capital city of Iceland, with a view of the sea, and a mountain with a snowy peak in the far distance
The first month of the winter, December, is still a cold month in Reykjavík, Iceland, with average temperature ranging between min -2.8°C (27°F) and max 2.2°C (36°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a still wintry 2.2°C (36°F). In December, the average low-temperature is -2.8°C (27°F).

Rainfall

In December, in Reykjavík, the rain falls for 13.9 days. Throughout December, 78.7mm (3.1") of precipitation is accumulated. In Reykjavík, during the entire year, the rain falls for 147.9 days and collects up to 798.2mm (31.4") of precipitation.

Sea temperature

In Reykjavík, Iceland, the average water temperature is 6.7°C (44.1°F). Swimming in 6.7°C (44.1°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

December has the shortest days of the year, with an average of 4.4h of daylight.

Sunshine

With an average of 0.4h of sunshine, December has the least sunshine of the year.

UV index

January, February, November and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays for average individuals.
The average daily UV index of 0 transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. 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 Reykjavík?

The average high-temperature, in December, in Reykjavík, is 2.2°C (36°F), while the average low-temperature is -2.8°C (27°F).

How many days does it rain in December in Reykjavík?

In Reykjavík, Iceland, during December, the rain falls for 13.9 days and regularly aggregates up to 78.7mm (3.1") of precipitation.

What is the water temperature in December in Reykjavík?

In Reykjavík, Iceland, the average seawater temperature in December is 6.7°C (44.1°F). Swimming in 6.7°C (44.1°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Reykjavík?

With an average of 4.4h of daylight, December has the shortest days of the year in Reykjavík.

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

The average length of the day in December in Reykjavík is 4.4h.

What is the month with the least sunshine in Reykjavík?

December has the least sunshine of the year in Reykjavík, with an average of 0.4h of sunshine.

How long on average sun shines in December in Reykjavík?

In December, the average sunshine is 0.4h.

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

Months with the lowest UV index in Reykjavík are January, February, November and December, with an average maximum UV index of 0.

What is the UV index reading in December in Reykjavík?

In December, the average daily maximum UV index is 0. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.
Average temperature in December - Reykjavík, Iceland
  • Average high temperature in December: 2.2°C

The warmest month (with the highest average high temperature) is July (13.3°C).
The month with the lowest average high temperature is January (1.9°C).

  • Average low temperature in December: -2.8°C

The month with the highest average low temperature is July (8.3°C).
The coldest month (with the lowest average low temperature) is January (-3°C).

Average rainfall in December - Reykjavík, Iceland
  • Average rainfall in December: 78.7mm

The wettest month (with the highest rainfall) is October (85.6mm).
The driest month (with the lowest rainfall) is May (43.8mm).

Average rainfall days in December - Reykjavík, Iceland
  • Average rainfall days in December: 13.9 days

The month with the highest number of rainy days is October (14.5 days).
The month with the lowest number of rainy days is May (9.8 days).

Average sea temperature in December - Reykjavík, Iceland
  • Average sea temperature in December: 6.7°C

The best month for swimming (with the highest average sea temperature) is July (11.4°C).
The coldest month (with the lowest average sea temperature) is March (5.1°C).

Average daylight in December / Average sunshine in December - Reykjavík, Iceland
  • Average daylight in December: 4.4h

The month with the longest days is June (Average daylight: 20.9h).
The month with shortest days is December (Average daylight: 4.4h).

  • Average sunshine in December: 0.4h

The month with most sunshine is May (Average sunshine: 6.2h).
The month with least sunshine is December (Average sunshine: 0.4h).

Average UV index in December - Reykjavík, Iceland
  • Average UV index in December: 0

Months with the highest UV index are June and July (UV index 4).
Months with the lowest UV index are January, February, November and December (UV index 0).