December weather forecast
Karlskrona, Sweden

December

Weather in December

December, the first month of the winter in Karlskrona, is also an icy month, with an average temperature fluctuating between 4°C (39.2°F) and 1.8°C (35.2°F).

Temperature

As December begins, there is a minor decrease in the average high-temperature, softly falling from a chilly 7.4°C (45.3°F) in November to a cold 4°C (39.2°F). In Karlskrona, the nocturnal temperatures throughout December show a marginal dip from the daytime averages, settling at a still wintry 1.8°C (35.2°F).

Humidity

In December, the average relative humidity is 85%.

Rainfall

In December, in Karlskrona, Sweden, the rain falls for 14.5 days. Throughout December, 38mm (1.5") of precipitation is accumulated. Throughout the year, in Karlskrona, there are 150.2 rainfall days, and 411mm (16.18") of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Karlskrona, during December, snow falls for 6.5 days and regularly aggregates up to 39mm (1.54") of snow. In Karlskrona, during the entire year, snow falls for 33 days and aggregates up to 183mm (7.2") of snow.

Sea temperature

In Karlskrona, the average seawater temperature in December is 5.3°C (41.5°F).
Note: Swimming in 5.3°C (41.5°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.

Daylight

The month with the shortest days in Karlskrona, Sweden, is December, with an average of 7h and 0min of daylight.
On the first day of December in Karlskrona, sunrise is at 08:06 and sunset at 15:27. On the last day of the month, sunrise is at 08:29 and sunset at 15:31 CET.

Sunshine

The months with the least sunshine in Karlskrona, Sweden, are January and December, with an average of 3.1h of sunshine.

UV index

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 2 in December translates into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.

Frequently asked questions

How cold is December in Karlskrona?
In Karlskrona, in December, the average high-temperature is 4°C (39.2°F), and the average low-temperature is 1.8°C (35.2°F).
What is the average humidity in December in Karlskrona?
In December, the average relative humidity in Karlskrona is 85%.
How many days does it rain in December in Karlskrona?
In Karlskrona, Sweden, in December, it is raining for 14.5 days, with typically 38mm (1.5") of accumulated precipitation.
How many days does it snow in December in Karlskrona?
In Karlskrona, Sweden, during December, snow falls for 6.5 days and regularly aggregates up to 39mm (1.54") of snow.
What is the water temperature in December in Karlskrona?
In Karlskrona, Sweden, in December, the average water temperature is 5.3°C (41.5°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.
What is the month with the shortest days in Karlskrona?
December has the shortest days of the year in Karlskrona, with an average of 7h and 0min of daylight.
What is the average length of the day in December in Karlskrona?
In Karlskrona, Sweden, the average day length in December is 7h and 2min.
When are sunrise and sunset in December in Karlskrona?
In December, on the first day of the month, sunrise is at 08:06 and sunset at 15:27. On the last day of the month, in Karlskrona, Sweden, sunrise is at 08:29 and sunset at 15:31 CET.
What are the months with the least sunshine in Karlskrona?
The months with the least sunshine in Karlskrona, Sweden, are January and December, with an average of 3.1h of sunshine.
How many hours of sunshine does Karlskrona have in December?
In December, the average sunshine duration in Karlskrona is 3.1h.
How high is the UV index in December in Karlskrona?
The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Karlskrona, Sweden
  • Average high temperature in December: 4°C

The warmest month (with the highest average high temperature) is August (19.8°C).
The month with the lowest average high temperature is January (2°C).

  • Average low temperature in December: 1.8°C

The month with the highest average low temperature is August (15.5°C).
The coldest month (with the lowest average low temperature) is February (-0.4°C).

Average pressure in December
Karlskrona, Sweden
  • Average pressure in December: 1010.8mbar

The months with the highest atmospheric pressure are April and May (1015.5mbar).
The month with the lowest atmospheric pressure is December (1010.8mbar).

Average wind speed in December
Karlskrona, Sweden
  • Average wind speed in December: 24.5km/h

The windiest month (with the highest average wind speed) is December (24.5km/h).
The calmest month (with the lowest average wind speed) is June (17.5km/h).

Average humidity in December
Karlskrona, Sweden
  • Average humidity in December: 85%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (75%).

Average rainfall in December
Karlskrona, Sweden
  • Average rainfall in December: 38mm

The wettest month (with the highest rainfall) is July (47mm).
The driest month (with the least rainfall) is April (15mm).

Average rainfall days in December
Karlskrona, Sweden
  • Average rainfall days in December: 14.5 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is February (7.9 days).

Average snowfall in December
Karlskrona, Sweden
  • Average snowfall in December: 39mm

The month with the highest snowfall is January (56mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December
Karlskrona, Sweden
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in December
Karlskrona, Sweden
  • Average sea temperature in December: 5.3°C

The best month for swimming (with the highest average sea temperature) is August (18.1°C).
The coldest months (with the lowest average sea temperature) are February and March (2.3°C).

Average daylight in December /
Average sunshine in December
Karlskrona, Sweden
  • Average daylight in December: 7h and 0min

The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).

Average sunshine days in December
Karlskrona, Sweden
  • Average sunshine days in December: 9.3 days

The month with the most sunshine days is April (18 days).
The months with the least sunshine days are November and December (9.3 days).

Average UV index in December
Karlskrona, Sweden
  • Average UV index in December: 2

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

Average cloud cover in December
Karlskrona, Sweden
  • Average cloud cover in December: 69

The month with the most cloud cover is December (Cloud cover 69).
The months with the least cloud cover are June and August (Cloud cover 33).

Average visibility in December
Karlskrona, 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).

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