December weather forecastRuissalo, Finland
December
Weather in December
December, the first month of the winter in Ruissalo, is also a wintry month, with an average temperature fluctuating between -2.2°C (28°F) and 1.1°C (34°F).Temperature
The transition to December results in a modest reduction in average high-temperature, moving from a wintry 4.5°C (40.1°F) in November to a still cold 1.1°C (34°F). Ruissalo navigates through December with a barely noticeable decrease in temperature at night, stabilizing at a freezing cold -2.2°C (28°F).Humidity
The average relative humidity in December is 87%.Rainfall
In December, the rain falls for 11.1 days. Throughout December, 41mm (1.61") of precipitation is accumulated. In Ruissalo, during the entire year, the rain falls for 134.6 days and collects up to 394mm (15.51") of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, in Ruissalo, it is snowing for 12.4 days. Throughout December, 82mm (3.23") of snow is accumulated. Throughout the year, in Ruissalo, there are 60.5 snowfall days, and 454mm (17.87") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 5h and 54min of daylight.On the first day of December in Ruissalo, sunrise is at 09:10 and sunset at 15:30. On the last day of the month, sunrise is at 09:37 and sunset at 15:31 EET.
Sunshine
The month with the least sunshine is December, with an average of 1.9h 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 unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Consider this! The reflection from snow can almost 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
Ruissalo, Finland
- Average high temperature in December: 1.1°C
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in December: -2.2°C
The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).
Average pressure in December
Ruissalo, Finland
- Average pressure in December: 1007.6mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).
Average wind speed in December
Ruissalo, Finland
- Average wind speed in December: 20.4km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in December
Ruissalo, Finland
- Average humidity in December: 87%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in December
Ruissalo, Finland
- Average rainfall in December: 41mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in December
Ruissalo, Finland
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in December
Ruissalo, Finland
- Average snowfall in December: 82mm
The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Ruissalo, Finland
- Average snowfall days in December: 12.4 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ruissalo, Finland
- Average daylight in December: 5h and 54min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in December: 1h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 54min).
Average sunshine days in December
Ruissalo, Finland
- Average sunshine days in December: 9.6 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).
Average UV index in December
Ruissalo, Finland
- Average UV index in December: 1
The months with the highest UV index are June, July and August (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
Ruissalo, Finland
- Average cloud cover in December: 71
The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in December
Ruissalo, Finland
- Average visibility in December: 9km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).
