December weather forecastSlemmestad, Norway

December

Weather in December

The first month of the winter, December, is still a freezing cold month in Slemmestad, Norway, with an average temperature varying between -5.3°C (22.5°F) and -1.6°C (29.1°F).

Temperature

The arrival of December corresponds with a minor reduction in the average high-temperature, down from November's icy 2.7°C (36.9°F) to a freezing cold -1.6°C (29.1°F). Slemmestad maintains a minor drop in temperature during December nights, with averages of -5.3°C (22.5°F).

Humidity

In December, the average relative humidity is 88%.

Rainfall

In Slemmestad, Norway, during December, the rain falls for 6.5 days and regularly aggregates up to 17mm (0.67") of precipitation. Throughout the year, there are 127.7 rainfall days, and 307mm (12.09") of precipitation is accumulated.

Snowfall

Months with snowfall in Slemmestad are January through May, October through December. In Slemmestad, in December, snow falls for 6.9 days, with typically accumulated 56mm (2.2") of snow. In Slemmestad, Norway, during the entire year, snow falls for 42.9 days and aggregates up to 271mm (10.67") of snow.

Sea temperature

In Slemmestad, in December, the average water temperature is 6.4°C (43.5°F).
Note: Swimming in 6.4°C (43.5°F) can be lethal. Merely spending a few minutes in 13°C (55.4°F) waters feels harsh, and venturing below 10°C (50°F) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

With an average of 6h and 6min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 08:52 and sunset at 15:22. On the last day of the month, sunrise is at 09:18 and sunset at 15:24 CET.

Sunshine

The months with the least sunshine are January and December, with an average of 3.2h of sunshine.

UV index

In December, the average daily maximum UV index in Slemmestad is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 2 during December leads to these advisories:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Enhance your sun protection with tightly woven, yet airy clothing. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.

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

Frequently asked questions

In December, in Slemmestad, the average high-temperature is -1.6°C (29.1°F), and the average low-temperature is -5.3°C (22.5°F).

In Slemmestad, the average relative humidity in December is 88%.

In Slemmestad, in December, during 6.5 rainfall days, 17mm (0.67") of precipitation is typically accumulated.

In Slemmestad, Norway, in December, during 6.9 snowfall days, 56mm (2.2") of snow is typically accumulated.

In Slemmestad, the average seawater temperature in December is 6.4°C (43.5°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.

The month with the shortest days in Slemmestad, Norway, is December, with an average of 6h and 6min of daylight.

In Slemmestad, Norway, the average day length in December is 6h and 7min.

In December, on the first day of the month, sunrise is at 08:52 and sunset at 15:22. On the last day of the month, in Slemmestad, Norway, sunrise is at 09:18 and sunset at 15:24 CET.

The months with the least sunshine are January and December, with an average of 3.2h of sunshine.

In December, the average sunshine duration in Slemmestad, Norway, is 3.2h.

In Slemmestad, Norway, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from 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

2.7°C

-1.6°C

-2.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10km/h

10.4km/h

10.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

3.9

6.9

10.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

16.1

18.3

16.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Slemmestad, Norway

Average high temperature in December: -1.6°C

The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-2.4°C).

Average low temperature in December: -5.3°C

The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is February (-7.8°C).

Average pressure in December
Slemmestad, Norway

Average pressure in December: 1008mbar

The month with the highest atmospheric pressure is April (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).

Average wind speed in December
Slemmestad, Norway

Average wind speed in December: 9.8km/h

The windiest month (with the highest average wind speed) is January (9.9km/h).
The calmest month (with the lowest average wind speed) is August (8.3km/h).

Average humidity in December
Slemmestad, Norway

Average humidity in December: 88%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).

Average rainfall in December
Slemmestad, Norway

Average rainfall in December: 17mm

The wettest month (with the highest rainfall) is July (40mm).
The driest month (with the least rainfall) is April (13mm).

Average rainfall days in December
Slemmestad, Norway

Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in December
Slemmestad, Norway

Average snowfall in December: 56mm

The month with the highest snowfall is March (73mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December
Slemmestad, Norway

Average snowfall days in December: 6.9 days

The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in December
Slemmestad, Norway

Average sea temperature in December: 6.4°C

The best month for swimming (with the highest average sea temperature) is August (17.8°C).
The coldest month (with the lowest average sea temperature) is March (3.2°C).

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

Average daylight in December: 6h and 6min

The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 6min).

Average sunshine in December: 3h and 12min

The month with the most sunshine is June (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).

Average sunshine days in December
Slemmestad, Norway

Average sunshine days in December: 18.3 days

The month with the most sunshine days is December (18.3 days).
The month with the least sunshine days is July (10.6 days).

Average UV index in December
Slemmestad, Norway

Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January and February (UV index 1).