Contents
- 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 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
December
Weather in December
Temperature
The transition to December results in a modest reduction in average high-temperature, moving from a cold 5.1°C (41.2°F) in November to a still wintry 1.5°C (34.7°F). Alster's December nights demonstrate minimal variation from the daytime temperatures, with an average of -1.5°C (29.3°F).Humidity
In Alster, the average relative humidity in December is 86%.Rainfall
In Alster, in December, during 10.3 rainfall days, 34mm (1.34") of precipitation is typically accumulated. Throughout the year, there are 151 rainfall days, and 477mm (18.78") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Alster, in December, during 8.4 snowfall days, 66mm (2.6") of snow is typically accumulated. In Alster, Sweden, during the entire year, snow falls for 47.6 days and aggregates up to 416mm (16.38") of snow.Daylight
The month with the shortest days in Alster is December, with an average of 6h and 12min of daylight.On the first day of the month, sunrise is at 08:36 and sunset at 15:12. On the last day of December, sunrise is at 09:02 and sunset at 15:15 CET.
Sunshine
December has the least sunshine of the year, with an average of 3.2h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Alster. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Stay sun-safe with clothing that is both closely woven and worn loosely. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Alster have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Alster have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Alster, Sweden
- Average high temperature in December: 1.5°C
The warmest month (with the highest average high temperature) is July (20.8°C).
The month with the lowest average high temperature is January (-0.3°C).
- Average low temperature in December: -1.5°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is February (-3.8°C).
Average pressure in December
Alster, Sweden
- Average pressure in December: 1008mbar
The months with the highest atmospheric pressure are April and May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in December
Alster, Sweden
- Average wind speed in December: 16.7km/h
The windiest month (with the highest average wind speed) is December (16.7km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in December
Alster, Sweden
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (69%).
Average rainfall in December
Alster, Sweden
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is July (57mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in December
Alster, Sweden
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are January and February (7.1 days).
Average snowfall in December
Alster, Sweden
- Average snowfall in December: 66mm
The month with the highest snowfall is January (108mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Alster, Sweden
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Alster, Sweden
- Average daylight in December: 6h and 1min
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: 3h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in December
Alster, Sweden
- Average sunshine days in December: 13.1 days
The month with the most sunshine days is April (17.5 days).
The month with the least sunshine days is November (10.6 days).
Average UV index in December
Alster, Sweden
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Alster, Sweden
- Average cloud cover in December: 63
The month with the most cloud cover is February (Cloud cover 66).
The months with the least cloud cover are June, July and August (Cloud cover 40).
Average visibility in December
Alster, Sweden
- Average visibility in December: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February and March (8km).
