December weather forecast
Keminmaa, Finland

Weather in December

December, the first month of the winter in Keminmaa, is still a freezing cold month, with an average temperature varying between -2.6°C (27.3°F) and -6°C (21.2°F).

Temperature

In December, the average high-temperature slightly decreases from a wintry 1.3°C (34.3°F) in November to a subzero cold -2.6°C (27.3°F). In Keminmaa, the average low-temperature is -6°C (21.2°F).

Humidity

In Keminmaa, the average relative humidity in December is 91%.

Rainfall

In Keminmaa, during 6.2 rainfall days, 47mm (1.85") of precipitation is typically accumulated. In Keminmaa, during the entire year, the rain falls for 127 days and collects up to 472mm (18.58") of precipitation.

Snowfall

Months with snowfall are January through June, October through December. In Keminmaa, during 18 snowfall days, 196mm (7.72") of snow is typically accumulated. Throughout the year, there are 98.7 snowfall days, and 1035mm (40.75") of snow is accumulated.

Sea temperature

In December, the average sea temperature is 1.9°C (35.4°F).
Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

The month with the shortest days is December, with an average of 3h and 20min of daylight.
On the first day of the month, sunrise is at 10:04 and sunset at 14:17. On the last day of December, in Keminmaa, sunrise is at 10:46 and sunset at 14:03 EET.

Sunshine

December has the least sunshine of the year in Keminmaa, with an average of 1.1h of sunshine.

UV index

January, March, October and December, with an average maximum UV index of 1, are months with the lowest UV index in Keminmaa, Finland. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 1 in December interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Keminmaa?

In December, the average relative humidity in Keminmaa is 91%.

How much does it rain in Keminmaa in December?

In Keminmaa, Finland, in December, during 6.2 rainfall days, 47mm (1.85") of precipitation is typically accumulated.

How much does it snow in Keminmaa in December?

In December, in Keminmaa, it is snowing for 18 days. Throughout December, 196mm (7.72") of snow is accumulated.

What is the sea temperature in December in Keminmaa?

In Keminmaa, Finland, the average seawater temperature in December is 1.9°C (35.4°F). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

What is the month with the shortest days in Keminmaa?

With an average of 3h and 20min of daylight, December has the shortest days of the year.

How many hours of daylight does Keminmaa have in December?

In Keminmaa, the average day length in December is 3h and 20min.

When are sunrise and sunset in December in Keminmaa?

On the first day of December, sunrise is at 10:04 and sunset at 14:17. On the last day of the month, sunrise is at 10:46 and sunset at 14:03 EET.

What is the month with the least sunshine in Keminmaa?

With an average of 1.1h of sunshine, December has the least sunshine of the year in Keminmaa.

How many hours of sunshine does Keminmaa have in December?

The average sunshine duration in December in Keminmaa is 1.1h.

When is the lowest UV index in Keminmaa?

The months with the lowest UV index are January, March, October and December, with an average maximum UV index of 1.

What is the UV index intensity in December in Keminmaa?

In Keminmaa, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.

Average temperature in December
Keminmaa, Finland

Average temperature in December - Keminmaa, Finland
  • Average high temperature in December: -2.6°C

The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (-6.3°C).

  • Average low temperature in December: -6°C

The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-10.7°C).

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Average pressure in December
Keminmaa, Finland

Average pressure in December - Keminmaa, Finland
  • Average pressure in December: 1004.9mbar

The month with the highest atmospheric pressure is May (1013.9mbar).
The month with the lowest atmospheric pressure is December (1004.9mbar).

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Average wind speed in December
Keminmaa, Finland

Average wind speed in December - Keminmaa, Finland
  • Average wind speed in December: 17.2km/h

The windiest month (with the highest average wind speed) is November (17.7km/h).
The calmest month (with the lowest average wind speed) is April (12.4km/h).

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Average humidity in December
Keminmaa, Finland

Average humidity in December - Keminmaa, Finland
  • Average humidity in December: 91%

The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is June (71%).

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Average rainfall in December
Keminmaa, Finland

Average rainfall in December - Keminmaa, Finland
  • Average rainfall in December: 47mm

The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (28mm).

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Average rainfall days in December
Keminmaa, Finland

Average rainfall days in December - Keminmaa, Finland
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in December
Keminmaa, Finland

Average snowfall in December - Keminmaa, Finland
  • Average snowfall in December: 196mm

The month with the highest snowfall is March (228mm).
The months with the least snowfall are July, August and September (0mm).

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Average snowfall days in December
Keminmaa, Finland

Average snowfall days in December - Keminmaa, Finland
  • Average snowfall days in December: 18 days

The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are July, August and September (0 days).

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Average sea temperature in December
Keminmaa, Finland

Average sea temperature in December - Keminmaa, Finland
  • Average sea temperature in December: 1.9°C

The best month for swimming (with the highest average sea temperature) is July (16.8°C).
The coldest months (with the lowest average sea temperature) are January and February (-0.7°C).

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Average daylight in December /
Average sunshine in December
Keminmaa, Finland

Average daylight in December / Average sunshine in December - Keminmaa, Finland
  • Average daylight in December: 3h and 20min

The month with the longest days is July (Average daylight: 20h and 43min).
The month with the shortest days is December (Average daylight: 3h and 20min).

  • Average sunshine in December: 1h and 6min

The month with the most sunshine is July (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

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Average sunshine days in December
Keminmaa, Finland

Average sunshine days in December - Keminmaa, Finland
  • Average sunshine days in December: 9.9 days

The month with the most sunshine days is October (13.9 days).
The month with the least sunshine days is December (9.9 days).

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Average UV index in December
Keminmaa, Finland

Average UV index in December - Keminmaa, 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, March, October and December (UV index 1).

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Average cloud cover in December
Keminmaa, Finland

Average cloud cover in December - Keminmaa, Finland
  • Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 40).

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Average visibility in December
Keminmaa, Finland

Average visibility in December - Keminmaa, Finland
  • Average visibility in December: 8km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March and April (7km).

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