December weather forecastValsta, Sweden
December
Weather in December
The first month of the winter, December, is also an icy month in Valsta, Sweden, with an average temperature fluctuating between -2.5°C (27.5°F) and 1.1°C (34°F).Temperature
Valsta's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's 4.7°C (40.5°F) to a still wintry 1.1°C (34°F). A consistent average low of -2.5°C (27.5°F) is noted throughout December, only a small step down from its daytime high.Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 90%.Rainfall
In Valsta, in December, during 9.8 rainfall days, 32mm (1.26") of precipitation is typically accumulated. Throughout the year, there are 144.9 rainfall days, and 400mm (15.75") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Valsta, in December, snow falls for 10.9 days, with typically accumulated 102mm (4.02") of snow. In Valsta, during the entire year, snow falls for 53 days and aggregates up to 497mm (19.57") of snow.Daylight
The month with the shortest days is December, with an average of 6h and 18min of daylight.On the first day of the month, sunrise is at 08:26 and sunset at 15:07. On the last day of December, sunrise is at 08:52 and sunset at 15:09 CET.
Sunshine
December has the least sunshine of the year in Valsta, with an average of 3h of sunshine.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, an average UV index of 2 transforms into the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Boost your sun resistance with garments that are densely woven yet spacious. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Valsta, Sweden
- Average high temperature in December: 1.1°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is January (-0.8°C).
- Average low temperature in December: -2.5°C
The month with the highest average low temperature is July (12.6°C).
The coldest months (with the lowest average low temperature) are January and February (-4.4°C).
Average pressure in December
Valsta, Sweden
- Average pressure in December: 1008.2mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1008.2mbar).
Average wind speed in December
Valsta, Sweden
- Average wind speed in December: 13.7km/h
The windiest month (with the highest average wind speed) is December (13.7km/h).
The calmest month (with the lowest average wind speed) is August (11.1km/h).
Average humidity in December
Valsta, Sweden
- Average humidity in December: 90%
The months with the highest relative humidity are January, February and December (90%).
The month with the lowest relative humidity is May (69%).
Average rainfall in December
Valsta, Sweden
- Average rainfall in December: 32mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in December
Valsta, Sweden
- Average rainfall days in December: 9.8 days
The months with the highest number of rainy days are July and August (16.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in December
Valsta, Sweden
- Average snowfall in December: 102mm
The month with the highest snowfall is January (121mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Valsta, Sweden
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Valsta, Sweden
- Average daylight in December: 6h and 18min
The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average sunshine days in December
Valsta, Sweden
- Average sunshine days in December: 12.4 days
The months with the most sunshine days are March and April (15.6 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in December
Valsta, Sweden
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Valsta, Sweden
- Average cloud cover in December: 66
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are June and August (Cloud cover 42).
Average visibility in December
Valsta, Sweden
- Average visibility in December: 8km
The months with the highest visibility are April, May, June, July, August and September (9km).
The months with the lowest visibility are January and February (7km).
