December weather forecastTerälahti, Finland
December
Weather in December
December, the first month of the winter in Terälahti, is also a subzero cold month, with an average temperature fluctuating between -1.7°C (28.9°F) and -4.8°C (23.4°F).Temperature
December signals a slight drop in average high-temperature, sliding from November's wintry 2.5°C (36.5°F) to a subzero cold -1.7°C (28.9°F). Terälahti notes a consistent average low-temperature of -4.8°C (23.4°F) during December nights.Humidity
The average relative humidity in December is 93%.Rainfall
In December, in Terälahti, Finland, the rain falls for 4.9 days. Throughout December, 19mm (0.75") of precipitation is accumulated. In Terälahti, during the entire year, the rain falls for 114.5 days and collects up to 256mm (10.08") of precipitation.Snowfall
January through May, October through December are months with snowfall. In Terälahti, in December, snow falls for 15.1 days, with typically accumulated 84mm (3.31") of snow. In Terälahti, Finland, during the entire year, snow falls for 85.3 days and aggregates up to 453mm (17.83") of snow.Daylight
The month with the shortest days is December, with an average of 5h and 30min of daylight.On the first day of December in Terälahti, Finland, sunrise is at 09:15 and sunset at 15:11. On the last day of the month, sunrise is at 09:44 and sunset at 15:11 EET.
Sunshine
With an average of 1.6h of sunshine, December has the least sunshine of the year.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 1 during December translates into the following guidance:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Terälahti, Finland
- Average high temperature in December: -1.7°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-4.3°C).
- Average low temperature in December: -4.8°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is January (-8.4°C).
Average pressure in December
Terälahti, Finland
- Average pressure in December: 1007.5mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1007.5mbar).
Average wind speed in December
Terälahti, Finland
- Average wind speed in December: 12.6km/h
The windiest month (with the highest average wind speed) is December (12.6km/h).
The calmest month (with the lowest average wind speed) is July (10km/h).
Average humidity in December
Terälahti, Finland
- Average humidity in December: 93%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (66%).
Average rainfall in December
Terälahti, Finland
- Average rainfall in December: 19mm
The wettest month (with the highest rainfall) is July (37mm).
The driest months (with the least rainfall) are March and April (16mm).
Average rainfall days in December
Terälahti, Finland
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Terälahti, Finland
- Average snowfall in December: 84mm
The months with the highest snowfall are January, February and March (86mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Terälahti, Finland
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is March (17.8 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Terälahti, Finland
- Average daylight in December: 5h and 30min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in December: 1h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).
Average sunshine days in December
Terälahti, Finland
- Average sunshine days in December: 13.1 days
The month with the most sunshine days is October (17.1 days).
The month with the least sunshine days is February (10.4 days).
Average UV index in December
Terälahti, Finland
- 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, February, March, November and December (UV index 1).
Average cloud cover in December
Terälahti, Finland
- Average cloud cover in December: 76
The month with the most cloud cover is February (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 44).
Average visibility in December
Terälahti, Finland
- Average visibility in December: 7km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January, February and March (6km).
