December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average sea temperature in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

The bridge connecting the city of Tromsø, Norway

Weather in December

December witnesses Tromsø at its coldest, mirroring the depths of the experienced perennial winter. It is characterized by morosely low temperatures, a high rate of snowfall, and the profound darkness of the Polar Nights. A stark increase in snowfall is observed from 308mm (12.13") in November to 379mm (14.92") in December, affirmatively affirming the arrival of winter. Although a lack of proper daylight makes outdoor pursuits challenging, the beauty of Tromsø in December lies in the ethereal Northern Lights that dance in the sky, making the cold and dark weather worth enduring.

Temperature

December's onset in Tromsø records an average high-temperature of a still subzero cold -2.5°C (27.5°F), a near match to November's -0.1°C (31.8°F). Tromsø logs an average low-temperature of -6°C (21.2°F) during the nights of December, subtly lower than its daytime highs.

Humidity

The average relative humidity in December in Tromsø, Norway, is 84%.

Rainfall

In Tromsø, in December, during 7.3 rainfall days, 89mm (3.5") of precipitation is typically accumulated. Throughout the year, there are 148.1 rainfall days, and 987mm (38.86") of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. In Tromsø, in December, during 17.8 snowfall days, 379mm (14.92") of snow is typically accumulated. Throughout the year, in Tromsø, there are 120.1 snowfall days, and 2826mm (111.26") of snow is accumulated.

Sea temperature

In Tromsø, in December, the average water temperature is 6.4°C (43.5°F).
Note: Unprotected swimming in 6.4°C (43.5°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.

Daylight

The months with the shortest days in Tromsø are June and December, with an average of 0h and 0min of daylight.

Sunshine

The month with the least sunshine in Tromsø, Norway, is December, with an average of 0.4h of sunshine.

UV index

January through April, October through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: During December, 1 as the daily maximum UV index converts into the following advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.

Updated: Jan 26, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How cold is December in Tromsø?

In December, in Tromsø, the average high-temperature is -2.5°C (27.5°F), and the average low-temperature is -6°C (21.2°F).

What is the average humidity in December in Tromsø?

In December, the average relative humidity in Tromsø is 84%.

How much does it rain in Tromsø in December?

In December, in Tromsø, Norway, the rain falls for 7.3 days. Throughout December, 89mm (3.5") of precipitation is accumulated.

How many days does it snow in December in Tromsø?

In Tromsø, in December, during 17.8 snowfall days, 379mm (14.92") of snow is typically accumulated.

How cold is the water in December in Tromsø?

In Tromsø, Norway, the average seawater temperature in December is 6.4°C (43.5°F). Swimming in 6.4°C (43.5°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 Tromsø?

The months with the shortest days in Tromsø are June and December, with an average of 0h and 0min of daylight.

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

In Tromsø, the average day length in December is 0h and 0min.

What is the month with the least sunshine in Tromsø?

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

How long on average sun shines in December in Tromsø?

In December, the average sunshine duration is 0.4h.

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

January through April, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Tromsø.

What is the UV index reading in December in Tromsø?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

-0.1°C 31.8°F

-2.5°C 27.5°F

-4.5°C 23.9°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

17km/h 10.6mph

18.3km/h 11.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

12.2

17.8

15.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

10.3

10.6

13.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Tromsø, Norway

Average high temperature in December: -2.5°C

The warmest month (with the highest average high temperature) is July (13.9°C).
The month with the lowest average high temperature is January (-4.5°C).

Average low temperature in December: -6°C

The month with the highest average low temperature is July (8.7°C).
The coldest month (with the lowest average low temperature) is February (-9.1°C).

Average pressure in December
Tromsø, Norway

Average pressure in December: 1000.7mbar

The month with the highest atmospheric pressure is May (1013.8mbar).
The month with the lowest atmospheric pressure is December (1000.7mbar).

Average wind speed in December
Tromsø, Norway

Average wind speed in December: 16.1km/h

The windiest month (with the highest average wind speed) is March (17km/h).
The calmest month (with the lowest average wind speed) is July (9.5km/h).

Average humidity in December
Tromsø, Norway

Average humidity in December: 84%

The month with the highest relative humidity is April (89%).
The month with the lowest relative humidity is July (79%).

Average rainfall in December
Tromsø, Norway

Average rainfall in December: 89mm

The wettest month (with the highest rainfall) is March (103mm).
The driest month (with the least rainfall) is July (55mm).

Average rainfall days in December
Tromsø, Norway

Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is February (4.7 days).

Average snowfall in December
Tromsø, Norway

Average snowfall in December: 379mm

The month with the highest snowfall is March (569mm).
The months with the least snowfall are July and August (0mm).

Average snowfall days in December
Tromsø, Norway

Average snowfall days in December: 17.8 days

The month with the highest number of snowfall days is March (22.9 days).
The months with the least snowfall days are July and August (0 days).

Average sea temperature in December
Tromsø, Norway

Average sea temperature in December: 6.4°C

The best month for swimming (with the highest average sea temperature) is August (11.3°C).
The coldest month (with the lowest average sea temperature) is March (4.2°C).

Average daylight in December /
Average sunshine in December
Tromsø, Norway

Average daylight in December: 0h and 0min

The month with the longest days is August (Average daylight: 18h and 0min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).

Average sunshine in December: 0h and 2min

The month with the most sunshine is August (Average sunshine: 8h and 0min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).

Average sunshine days in December
Tromsø, Norway

Average sunshine days in December: 10.6 days

The month with the most sunshine days is January (13.2 days).
The month with the least sunshine days is March (6.2 days).

Average UV index in December
Tromsø, Norway

Average UV index in December: 1

The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).

Average cloud cover in December
Tromsø, Norway

Average cloud cover in December: 65

The month with the most cloud cover is March (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 58).

Average visibility in December
Tromsø, Norway

Average visibility in December: 8km

The months with the highest visibility are June, July, August, September, October and November (9km).
The month with the lowest visibility is April (7km).

December weather forecast
Tromsø, Norway

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