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 is characterized by a slight reduction in average high-temperature, easing from a wintry 1.8°C (35.2°F) in November to a subzero cold -1.2°C (29.8°F). A minor drop in temperature is observed from daytime highs during the nights of December, averaging a still freezing cold -4.5°C (23.9°F).Humidity
The average relative humidity in December is 89%.Rainfall
The month with the most rainfall is December, when the rain falls for 7.5 days and typically aggregates up to 43mm (1.69") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Billsta, during December, snow falls for 16.3 days and regularly aggregates up to 178mm (7.01") of snow. Throughout the year, there are 85.1 snowfall days, and 868mm (34.17") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 4h and 48min of daylight.On the first day of December, sunrise is at 08:54 and sunset at 14:15. On the last day of the month, sunrise is at 09:25 and sunset at 14:12 CET.
Sunshine
The month with the least sunshine is December, with an average of 1.5h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, an average UV index of 1 transforms into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. During bright days, sunglasses that offer UVA and UVB defense are recommended. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the wettest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine in Billsta?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Billsta, Sweden
- Average high temperature in December: -1.2°C
The warmest month (with the highest average high temperature) is July (19.3°C).
The month with the lowest average high temperature is January (-3.5°C).
- Average low temperature in December: -4.5°C
The month with the highest average low temperature is July (11.7°C).
The coldest month (with the lowest average low temperature) is February (-7.5°C).
Average pressure in December
Billsta, Sweden
- Average pressure in December: 1005.5mbar
The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1005.5mbar).
Average wind speed in December
Billsta, Sweden
- Average wind speed in December: 15.1km/h
The windiest month (with the highest average wind speed) is December (15.1km/h).
The calmest month (with the lowest average wind speed) is August (11.4km/h).
Average humidity in December
Billsta, Sweden
- Average humidity in December: 89%
The month with the highest relative humidity is February (92%).
The month with the lowest relative humidity is June (68%).
Average rainfall in December
Billsta, Sweden
- Average rainfall in December: 43mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in December
Billsta, Sweden
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is August (15 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in December
Billsta, Sweden
- Average snowfall in December: 178mm
The month with the highest snowfall is January (191mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Billsta, Sweden
- Average snowfall days in December: 16.3 days
The month with the highest number of snowfall days is January (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Billsta, Sweden
- Average daylight in December: 4h and 5min
The month with the longest days is June (Average daylight: 20h and 18min).
The month with the shortest days is December (Average daylight: 4h and 48min).
- Average sunshine in December: 1h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average sunshine days in December
Billsta, Sweden
- Average sunshine days in December: 9.7 days
The month with the most sunshine days is June (16.8 days).
The month with the least sunshine days is December (9.7 days).
Average UV index in December
Billsta, Sweden
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Billsta, Sweden
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in December
Billsta, Sweden
- Average visibility in December: 8km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (7km).
