December weather forecastKarstula, Finland
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Karstula, Finland, with an average temperature varying between -2.6°C (27.3°F) and -6.1°C (21°F).Temperature
December's arrival signals a moderate reduction in the average high-temperature, easing from a wintry 1.3°C (34.3°F) in November to a freezing cold -2.6°C (27.3°F). December nights in Karstula document an average temperature reading of -6.1°C (21°F).Humidity
In Karstula, the average relative humidity in December is 94%.Rainfall
In Karstula, during December, the rain falls for 5.7 days and regularly aggregates up to 36mm (1.42") of precipitation. Throughout the year, in Karstula, there are 126.7 rainfall days, and 417mm (16.42") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Karstula. In Karstula, Finland, in December, snow falls for 19.9 days, with typically accumulated 205mm (8.07") of snow. In Karstula, during the entire year, snow falls for 103.2 days and aggregates up to 1012mm (39.84") of snow.Daylight
The month with the shortest days in Karstula is December, with an average of 5h and 0min of daylight.On the first day of December in Karstula, sunrise is at 09:24 and sunset at 14:55. On the last day of the month, sunrise is at 09:54 and sunset at 14:53 EET.
Sunshine
With an average of 0.8h of sunshine, December has the least sunshine of the year in Karstula.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 value 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:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Karstula, Finland
- Average high temperature in December: -2.6°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (-5.2°C).
- Average low temperature in December: -6.1°C
The month with the highest average low temperature is July (11.8°C).
The coldest month (with the lowest average low temperature) is January (-9.6°C).
Average pressure in December
Karstula, Finland
- Average pressure in December: 1007mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1007mbar).
Average wind speed in December
Karstula, Finland
- Average wind speed in December: 12.5km/h
The windiest month (with the highest average wind speed) is December (12.5km/h).
The calmest month (with the lowest average wind speed) is July (9.8km/h).
Average humidity in December
Karstula, Finland
- Average humidity in December: 94%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is May (68%).
Average rainfall in December
Karstula, Finland
- Average rainfall in December: 36mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is March (25mm).
Average rainfall days in December
Karstula, Finland
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in December
Karstula, Finland
- Average snowfall in December: 205mm
The month with the highest snowfall is January (227mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Karstula, Finland
- Average snowfall days in December: 19.9 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Karstula, Finland
- Average daylight in December: 5h and 0min
The month with the longest days is June (Average daylight: 20h and 0min).
The month with the shortest days is December (Average daylight: 5h and 0min).
- Average sunshine in December: 0h and 48min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 0h and 48min).
Average sunshine days in December
Karstula, Finland
- Average sunshine days in December: 9.6 days
The month with the most sunshine days is May (16.1 days).
The month with the least sunshine days is December (9.6 days).
Average UV index in December
Karstula, Finland
- 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
Karstula, Finland
- Average cloud cover in December: 80
The month with the most cloud cover is January (Cloud cover 83).
The months with the least cloud cover are June and July (Cloud cover 48).
Average visibility in December
Karstula, Finland
- Average visibility in December: 6km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (5km).
