Trondheim
Norway
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Trondheim, Norway

The first month of the winter, December, is also a wintry month in Trondheim, Norway, with average temperature fluctuating between 1°C (33.8°F) and -4°C (24.8°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still wintry 1°C (33.8°F). In Trondheim, the average low-temperature is -4°C (24.8°F).

Rainfall

In Trondheim, it is raining for 24 days, with typically 123mm (4.8") of accumulated precipitation. Throughout the year, in Trondheim, there are 239 rainfall days, and 1096mm (43.1") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Trondheim is 7.3°C (45.1°F).
Note: Swimming in 7.3°C (45.1°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

December has the shortest days of the year in Trondheim, with an average of 4.7h of daylight.

Sunshine

January and December, with an average of 0h of sunshine, are months with the least sunshine in Trondheim.

UV index

Months with the lowest UV index in Trondheim are January, February, November and December, with an average maximum UV index of 0. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 0 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in December in Trondheim?

In Trondheim, in December, the average high-temperature is 1°C (33.8°F), and the average low-temperature is -4°C (24.8°F).

How much does it rain in Trondheim in December?

In Trondheim, Norway, during December, the rain falls for 24 days and regularly aggregates up to 123mm (4.8") of precipitation.

What is the water temperature in December in Trondheim?

In December, the average sea temperature in Trondheim, Norway, is 7.3°C (45.1°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the month with the shortest days in Trondheim?

December has the shortest days of the year in Trondheim, Norway, with an average of 4.7h of daylight.

How many hours of daylight does Trondheim have in December?

The average length of the day in December in Trondheim, Norway, is 4.7h.

What is the month with the least sunshine in Trondheim?

January and December, with an average of 0h of sunshine, are months with the least sunshine.

How long on average sun shines in December in Trondheim?

In Trondheim, Norway, the average sunshine in December is 0h.

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

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

How high is the UV index in December in Trondheim?

In December, the average daily maximum UV index in Trondheim is 0. A UV Index value of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV radiation.
Average temperature in December - Trondheim, Norway
  • Average high temperature in December: 1°C

The warmest month (with the highest average high temperature) is August (17°C).
Months with the lowest average high temperature are January and February (0°C).

  • Average low temperature in December: -4°C

Months with the highest average low temperature are July and August (9°C).
Coldest months (with the lowest average low temperature) are January and February (-5°C).

Average rainfall in December - Trondheim, Norway
  • Average rainfall in December: 123mm

The wettest month (with the highest rainfall) is September (133mm).
The driest month (with the lowest rainfall) is May (53mm).

Average rainfall days in December - Trondheim, Norway
  • Average rainfall days in December: 24 days

Months with the highest number of rainy days are September and December (24 days).
The month with the lowest number of rainy days is May (15 days).

Average sea temperature in December - Trondheim, Norway
  • Average sea temperature in December: 7.3°C

The best month for swimming (with the highest average sea temperature) is August (14.8°C).
The coldest month (with the lowest average sea temperature) is March (4.9°C).

Average daylight in December / Average sunshine in December - Trondheim, Norway
  • Average daylight in December: 4.7h

The month with the longest days is June (Average daylight: 20.4h).
The month with shortest days is December (Average daylight: 4.7h).

  • Average sunshine in December: 0h

Months with most sunshine are May and June (Average sunshine: 7h).
Months with least sunshine are January and December (Average sunshine: 0).

Average UV index in December - Trondheim, Norway
  • 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).