December weather forecastHertsön, Sweden
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Hertsön, Sweden, with temperature in the range of an average high of -2.1°C (28.2°F) and an average low of -5.7°C (21.7°F).Temperature
December sees a slight reduction in average high-temperature, with a shift from an icy 1.5°C (34.7°F) in November to a freezing cold -2.1°C (28.2°F). Hertsön, during December nights, witnesses an average temperature marginally cooler than its daytime highs, at a still subzero cold -5.7°C (21.7°F).Humidity
In December, the average relative humidity is 89%.Rainfall
December is the month with the most rainfall. Rain falls for 6.3 days and accumulates 46mm (1.81") of precipitation.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall is December, when snow falls for 15 days and typically aggregates up to 178mm (7.01") of snow.Daylight
With an average of 3h and 30min of daylight, December has the shortest days of the year in Hertsön.On the first day of December, sunrise is at 09:11 and sunset at 13:28. On the last day of the month, sunrise is at 09:49 and sunset at 13:18 CET.
Sunshine
December has the least sunshine of the year, with an average of 1.3h 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 vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hertsön, Sweden
- Average high temperature in December: -2.1°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (-5.7°C).
- Average low temperature in December: -5.7°C
The month with the highest average low temperature is July (13°C).
The coldest month (with the lowest average low temperature) is February (-10.6°C).
Average pressure in December
Hertsön, Sweden
- Average pressure in December: 1004.8mbar
The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1004.8mbar).
Average wind speed in December
Hertsön, Sweden
- Average wind speed in December: 17.3km/h
The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is April (13km/h).
Average humidity in December
Hertsön, Sweden
- Average humidity in December: 89%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is June (70%).
Average rainfall in December
Hertsön, Sweden
- Average rainfall in December: 46mm
The wettest month (with the highest rainfall) is December (46mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in December
Hertsön, Sweden
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is August (13.9 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in December
Hertsön, Sweden
- Average snowfall in December: 178mm
The month with the highest snowfall is December (178mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Hertsön, Sweden
- Average snowfall days in December: 15 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hertsön, Sweden
- Average daylight in December: 3h and 30min
The month with the longest days is June (Average daylight: 22h and 30min).
The month with the shortest days is December (Average daylight: 3h and 30min).
- Average sunshine in December: 1h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 18min).
Average sunshine days in December
Hertsön, Sweden
- Average sunshine days in December: 11.6 days
The months with the most sunshine days are June and October (16.5 days).
The month with the least sunshine days is December (11.6 days).
Average UV index in December
Hertsön, 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, March, November and December (UV index 1).
Average cloud cover in December
Hertsön, Sweden
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in December
Hertsön, Sweden
- Average visibility in December: 8km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March and April (7km).
