December weather forecastMörtnäs, Sweden

December

Weather in December

December, the first month of the winter in Mörtnäs, is also an icy month, with an average temperature fluctuating between -0.4°C (31.3°F) and 2.3°C (36.1°F).

Temperature

December implies a soft temperature shift, with average high-temperatures reducing from November's wintry 5.7°C (42.3°F) to a still cold 2.3°C (36.1°F). Mörtnäs maintains an average low-temperature of -0.4°C (31.3°F) throughout December's nights.

Humidity

January, February, November and December, with an average relative humidity of 85%, are the most humid months.

Rainfall

In Mörtnäs, during December, the rain falls for 9.1 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, there are 125.3 rainfall days, and 261mm (10.28") of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 8.8 days and typically aggregates up to 41mm (1.61") of snow.

Sea temperature

In December, the average sea temperature is 4.8°C (40.6°F).
Note: In swimming engagements, this poses immediate life-threatening risks. The loss of breath control is instantaneous, thereby hindering clear thought. A specialized swimsuit is mandatory to limit thermal dissipation.

Daylight

December has the shortest days of the year in Mörtnäs, with an average of 6h and 12min of daylight.
On the first day of the month, sunrise is at 08:16 and sunset at 14:54. On the last day of December, in Mörtnäs, Sweden, sunrise is at 08:42 and sunset at 14:56 CET.

Sunshine

The month with the least sunshine is December, with an average of 2.5h of sunshine.

UV index

In December, the average daily maximum UV index in Mörtnäs, Sweden, is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 2 in December translates into this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Mörtnäs, 2.3°C (36.1°F) is the average high-temperature and -0.4°C (31.3°F) is the average low-temperature during December.

January, February, November and December, with an average relative humidity of 85%, are most humid months in Mörtnäs, Sweden.

The average relative humidity in December in Mörtnäs is 85%.

In Mörtnäs, Sweden, in December, during 9.1 rainfall days, 23mm (0.91") of precipitation is typically accumulated.

The month with the most snowfall in Mörtnäs is December, when snow falls for 8.8 days and typically aggregates up to 41mm (1.61") of snow.

In Mörtnäs, Sweden, in December, snow falls for 8.8 days, with typically accumulated 41mm (1.61") of snow.

In December, the average sea temperature in Mörtnäs is 4.8°C (40.6°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

The month with the shortest days in Mörtnäs is December, with an average of 6h and 12min of daylight.

In December, the average day length in Mörtnäs is 6h and 14min.

On the first day of December, sunrise is at 08:16 and sunset at 14:54. On the last day of the month, sunrise is at 08:42 and sunset at 14:56 CET.

With an average of 2.5h of sunshine, December has the least sunshine of the year.

In December, the average sunshine duration in Mörtnäs, Sweden, is 2.5h.

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

5.7°C

2.3°C

0.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

23.5km/h

25.9km/h

24.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

3.1

8.8

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

12.7

11.7

13.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Mörtnäs, Sweden

Average high temperature in December: 2.3°C

The warmest month (with the highest average high temperature) is July (18.9°C).
The months with the lowest average high temperature are January and February (0.4°C).

Average low temperature in December: -0.4°C

The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (-2.2°C).

Average pressure in December
Mörtnäs, Sweden

Average pressure in December: 1007.8mbar

The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).

Average wind speed in December
Mörtnäs, Sweden

Average wind speed in December: 24.7km/h

The windiest month (with the highest average wind speed) is December (24.7km/h).
The calmest month (with the lowest average wind speed) is July (15.8km/h).

Average humidity in December
Mörtnäs, Sweden

Average humidity in December: 85%

The months with the highest relative humidity are January, February, November and December (85%).
The months with the lowest relative humidity are April, May and June (77%).

Average rainfall in December
Mörtnäs, Sweden

Average rainfall in December: 23mm

The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is April (10mm).

Average rainfall days in December
Mörtnäs, Sweden

Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is August (13.9 days).
The month with the least rainy days is February (5.4 days).

Average snowfall in December
Mörtnäs, Sweden

Average snowfall in December: 41mm

The month with the highest snowfall is December (41mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December
Mörtnäs, Sweden

Average snowfall days in December: 8.8 days

The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in December
Mörtnäs, Sweden

Average sea temperature in December: 4.8°C

The best month for swimming (with the highest average sea temperature) is August (18.8°C).
The coldest month (with the lowest average sea temperature) is February (1°C).

Average daylight in December /
Average sunshine in December
Mörtnäs, Sweden

Average daylight in December: 6h and 12min

The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).

Average sunshine in December: 2h and 30min

The month with the most sunshine is June (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).

Average sunshine days in December
Mörtnäs, Sweden

Average sunshine days in December: 11.7 days

The month with the most sunshine days is May (17.9 days).
The month with the least sunshine days is December (11.7 days).

Average UV index in December
Mörtnäs, Sweden

Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).

Average cloud cover in December
Mörtnäs, Sweden

Average cloud cover in December: 65

The months with the most cloud cover are January and February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Mörtnäs, Sweden

Average visibility in December: 9km

The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).