Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The transition to December results in a modest reduction in average high-temperature, moving from a frosty 6.7°C (44.1°F) in November to an icy 3.5°C (38.3°F). December nights in Houtskär experience a minor temperature downturn to a still wintry 1.7°C (35.1°F).Humidity
The average relative humidity in December in Houtskär is 81%.Rainfall
In Houtskär, during December, the rain falls for 11.8 days and regularly aggregates up to 33mm (1.3") of precipitation. Throughout the year, in Houtskär, there are 132.5 rainfall days, and 310mm (12.2") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Houtskär, it is snowing for 7.5 days. Throughout December, 29mm (1.14") of snow is accumulated. Throughout the year, in Houtskär, there are 38.5 snowfall days, and 160mm (6.3") of snow is accumulated.Sea temperature
In Houtskär, Finland, in December, the average water temperature is 1.7°C (35.1°F).Note: In the scenario of swimming, this is assessed as life-threatening and highly risky. The chilling water causes severe discomfort and induces instant hyperventilation. A specialized swimsuit is necessary to counter thermal damage.
Daylight
December has the shortest days of the year, with an average of 6h and 0min of daylight.On the first day of the month, sunrise is at 09:12 and sunset at 15:35. On the last day of December, in Houtskär, Finland, sunrise is at 09:38 and sunset at 15:36 EET.
Sunshine
The month with the least sunshine in Houtskär is December, with an average of 2h of sunshine.UV index
January through March and December, with an average maximum UV index of 1, are months with the lowest UV index in Houtskär, Finland. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 1 in December translates into this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
Is it cold in Houtskär during December?
What is the average humidity in December in Houtskär?
How much does it rain in Houtskär in December?
How much does it snow in Houtskär in December?
What is the water temperature in December in Houtskär?
What is the month with the shortest days in Houtskär?
How many hours of daylight does Houtskär have in December?
What time are sunrise and sunset in December in Houtskär?
What is the month with the least sunshine in Houtskär?
How many hours of sunshine does Houtskär have in December?
When is the lowest UV index in Houtskär?
How high is the UV index in December in Houtskär?
Average temperature in December
Houtskär, Finland
- Average high temperature in December: 3.5°C
The warmest month (with the highest average high temperature) is August (18.1°C).
The month with the lowest average high temperature is February (0.3°C).
- Average low temperature in December: 1.7°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (-1.7°C).
Average pressure in December
Houtskär, Finland
- Average pressure in December: 1007.8mbar
The month with the highest atmospheric pressure is May (1015mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in December
Houtskär, Finland
- Average wind speed in December: 34.1km/h
The windiest month (with the highest average wind speed) is December (34.1km/h).
The calmest month (with the lowest average wind speed) is July (21.2km/h).
Average humidity in December
Houtskär, Finland
- Average humidity in December: 81%
The months with the highest relative humidity are February and March (84%).
The months with the lowest relative humidity are August, September and October (78%).
Average rainfall in December
Houtskär, Finland
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is September (38mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in December
Houtskär, Finland
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Houtskär, Finland
- Average snowfall in December: 29mm
The month with the highest snowfall is January (41mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Houtskär, Finland
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Houtskär, Finland
- Average sea temperature in December: 1.7°C
The best month for swimming (with the highest average sea temperature) is August (12.3°C).
The coldest month (with the lowest average sea temperature) is March (-0.2°C).
Average daylight in December /
Average sunshine in December
Houtskär, Finland
- Average daylight in December: 6h and 0min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in December: 2h
The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 2h).
Average sunshine days in December
Houtskär, Finland
- Average sunshine days in December: 8.9 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is December (8.9 days).
Average UV index in December
Houtskär, 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 and December (UV index 1).
Average cloud cover in December
Houtskär, Finland
- Average cloud cover in December: 71
The months with the most cloud cover are January and December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Houtskär, Finland
- Average visibility in December: 9km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
Houtskär, Finland
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