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
December ushers in a minor alteration in Vallentuna's climate, with the average high-temperature moving from November's 4.9°C (40.8°F) to a still icy 1.5°C (34.7°F). Nighttime temperature in Vallentuna reflects an average dip to a subzero cold -2°C (28.4°F) in December, subtly cooler than its daytime highs.Humidity
The months with the highest humidity in Vallentuna are January, February and December, with an average relative humidity of 88%.Rainfall
In Vallentuna, Sweden, during December, the rain falls for 9.5 days and regularly aggregates up to 34mm (1.34") of precipitation. In Vallentuna, during the entire year, the rain falls for 147.2 days and collects up to 402mm (15.83") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Vallentuna, Sweden, in December, during 11.1 snowfall days, 82mm (3.23") of snow is typically accumulated. In Vallentuna, Sweden, during the entire year, snow falls for 54.7 days and aggregates up to 401mm (15.79") of snow.Daylight
With an average of 6h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 08:19 and sunset at 14:54. On the last day of December, sunrise is at 08:45 and sunset at 14:56 CET.
Sunshine
December has the least sunshine of the year, with an average of 2.4h of sunshine.UV index
In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Vallentuna in December?
What are the most humid months in Vallentuna?
What is the average humidity in December in Vallentuna?
How many days does it rain in December in Vallentuna?
How much does it snow in Vallentuna in December?
What is the month with the shortest days in Vallentuna?
What is the average length of the day in December in Vallentuna?
When is the sunrise / sunset in December in Vallentuna?
What is the month with the least sunshine in Vallentuna?
How many hours of sunshine does Vallentuna have in December?
What is the UV index intensity in December in Vallentuna?
Average temperature in December
Vallentuna, Sweden
- Average high temperature in December: 1.5°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-0.7°C).
- Average low temperature in December: -2°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).
Average pressure in December
Vallentuna, Sweden
- Average pressure in December: 1007.7mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1007.7mbar).
Average wind speed in December
Vallentuna, Sweden
- Average wind speed in December: 17.7km/h
The windiest month (with the highest average wind speed) is December (17.7km/h).
The calmest months (with the lowest average wind speed) are July and August (12.2km/h).
Average humidity in December
Vallentuna, Sweden
- Average humidity in December: 88%
The months with the highest relative humidity are January, February and December (88%).
The month with the lowest relative humidity is May (71%).
Average rainfall in December
Vallentuna, Sweden
- Average rainfall in December: 34mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in December
Vallentuna, Sweden
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Vallentuna, Sweden
- Average snowfall in December: 82mm
The month with the highest snowfall is February (105mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Vallentuna, Sweden
- Average snowfall days in December: 11.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Vallentuna, Sweden
- Average daylight in December: 6h and 1min
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 12min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in December
Vallentuna, Sweden
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is April (14.3 days).
The month with the least sunshine days is August (9.9 days).
Average UV index in December
Vallentuna, 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
Vallentuna, Sweden
- Average cloud cover in December: 66
The months with the most cloud cover are January and February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in December
Vallentuna, Sweden
- Average visibility in December: 9km
The months with the highest visibility are April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February and March (8km).
