December weather forecastVallsta, Sweden
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Vallsta, Sweden, with an average temperature varying between -4.8°C (23.4°F) and -1.5°C (29.3°F).Temperature
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a cold 2.2°C (36°F) in November to a freezing cold -1.5°C (29.3°F). In December, Vallsta temperatures settle at a low of -4.8°C (23.4°F) during the nights, reflecting a minor change from daytime highs.Humidity
The average relative humidity in December is 89%.Rainfall
In Vallsta, in December, during 6.1 rainfall days, 17mm (0.67") of precipitation is typically accumulated. Throughout the year, in Vallsta, there are 122.8 rainfall days, and 298mm (11.73") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Vallsta, in December, during 13.2 snowfall days, 82mm (3.23") of snow is typically accumulated. Throughout the year, there are 68.5 snowfall days, and 525mm (20.67") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 5h and 30min of daylight.On the first day of the month, sunrise is at 08:43 and sunset at 14:43. On the last day of December, sunrise is at 09:12 and sunset at 14:43 CET.
Sunshine
December has the least sunshine of the year, with an average of 1.7h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Vallsta, 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 (-3°C).
- Average low temperature in December: -4.8°C
The month with the highest average low temperature is July (11.2°C).
The coldest month (with the lowest average low temperature) is January (-7.2°C).
Average pressure in December
Vallsta, Sweden
- Average pressure in December: 1006.5mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1006.5mbar).
Average wind speed in December
Vallsta, Sweden
- Average wind speed in December: 11km/h
The windiest month (with the highest average wind speed) is December (11km/h).
The calmest month (with the lowest average wind speed) is August (8.8km/h).
Average humidity in December
Vallsta, Sweden
- Average humidity in December: 89%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (67%).
Average rainfall in December
Vallsta, Sweden
- Average rainfall in December: 17mm
The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is April (13mm).
Average rainfall days in December
Vallsta, Sweden
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in December
Vallsta, Sweden
- Average snowfall in December: 82mm
The month with the highest snowfall is March (120mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Vallsta, Sweden
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is February (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Vallsta, Sweden
- Average daylight in December: 5h and 30min
The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in December: 1h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in December
Vallsta, Sweden
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is September (15.9 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in December
Vallsta, 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, February, March, November and December (UV index 1).
Average cloud cover in December
Vallsta, Sweden
- Average cloud cover in December: 64
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 45).
Average visibility in December
Vallsta, Sweden
- Average visibility in December: 7km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January, February and March (6km).
