December weather forecastKällby, Sweden
December
Weather in December
The first month of the winter, December, is still a cold month in Källby, Sweden, with temperature in the range of an average low of -1.2°C (29.8°F) and an average high of 2.1°C (35.8°F).Temperature
The arrival of December corresponds with a light shift in temperature, down from a cold 5.5°C (41.9°F) in November to a still icy 2.1°C (35.8°F). Källby's nocturnal December readings average at a subzero cold -1.2°C (29.8°F), showing little variation from the daytime temperatures.Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 88%.Rainfall
In Källby, during December, the rain falls for 10.7 days and regularly aggregates up to 37mm (1.46") of precipitation. Throughout the year, there are 152.6 rainfall days, and 462mm (18.19") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Källby, Sweden, during December, snow falls for 9.5 days and regularly aggregates up to 67mm (2.64") of snow. Throughout the year, in Källby, there are 46.2 snowfall days, and 378mm (14.88") of snow is accumulated.Daylight
The month with the shortest days in Källby, Sweden, is December, with an average of 6h and 30min of daylight.On the first day of December, sunrise is at 08:30 and sunset at 15:21. On the last day of the month, sunrise is at 08:56 and sunset at 15:23 CET.
Sunshine
The months with the least sunshine in Källby are February and December, 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. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 1 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Källby, Sweden
- Average high temperature in December: 2.1°C
The warmest month (with the highest average high temperature) is July (20.6°C).
The month with the lowest average high temperature is January (0.4°C).
- Average low temperature in December: -1.2°C
The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is February (-3.2°C).
Average pressure in December
Källby, Sweden
- Average pressure in December: 1008.5mbar
The months with the highest atmospheric pressure are April and May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1008.5mbar).
Average wind speed in December
Källby, Sweden
- Average wind speed in December: 18.2km/h
The windiest month (with the highest average wind speed) is December (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in December
Källby, 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 April (71%).
Average rainfall in December
Källby, Sweden
- Average rainfall in December: 37mm
The wettest month (with the highest rainfall) is June (56mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in December
Källby, Sweden
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is August (16.7 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in December
Källby, Sweden
- Average snowfall in December: 67mm
The month with the highest snowfall is January (94mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Källby, Sweden
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Källby, Sweden
- Average daylight in December: 6h and 30min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in December: 3h and 12min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The months with the least sunshine are February and December (Average sunshine: 3h and 12min).
Average sunshine days in December
Källby, Sweden
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (10.5 days).
Average UV index in December
Källby, 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
Källby, Sweden
- Average cloud cover in December: 68
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 42).
Average visibility in December
Källby, Sweden
- Average visibility in December: 8km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February and December (8km).
