December weather forecast
Oulu, Finland

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Weather in December

December is marked by the enchanting spectacle of winter in full swing. The magical phenomenon of the Northern Lights illuminates the night skies in this city. The entire city seems to be enveloped in a thick white quilt with 230mm (9.06") of average snowfall. Despite the bone-chilling winters and short days, Oulu reveals an enchanting side during this month. The Christmas vibes add a charm to the snow-clad city, ending the year on a stunning note.

Temperature

The onset of December aligns with a soft reduction in the average high-temperature, gently falling from a wintry 1.1°C (34°F) in November to a freezing cold -3°C (26.6°F). Oulu's average temperature throughout the nights in December exhibits a minor decrease from daytime highs, stabilizing at -6.4°C (20.5°F).

Humidity

In December, the average relative humidity in Oulu, Finland, is 93%.

Rainfall

In Oulu, in December, it is raining for 6.4 days, with typically 44mm (1.73") of accumulated precipitation. Throughout the year, in Oulu, there are 117.3 rainfall days, and 434mm (17.09") of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In Oulu, during December, snow falls for 20.9 days and regularly aggregates up to 230mm (9.06") of snow. In Oulu, during the entire year, snow falls for 107.1 days and aggregates up to 1131mm (44.53") of snow.

Sea temperature

In Oulu, Finland, in December, the average water temperature is 2°C (35.6°F).
Note: During the act of swimming, this is a direct threat to life. Breathing becomes erratic and cognitive abilities decline rapidly. The importance of a specialized swimsuit to minimize thermal loss is paramount.

Daylight

The month with the shortest days is December, with an average of 3h and 54min of daylight.
On the first day of December in Oulu, sunrise is at 09:49 and sunset at 14:25. On the last day of the month, sunrise is at 10:25 and sunset at 14:17 EET.

Sunshine

The month with the least sunshine is December, with an average of 1h 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 in Oulu, Finland. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 1 during December morphs into the following directions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in Oulu in December?

The average high-temperature and low-temperature in Oulu, Finland, during December are -3°C (26.6°F) and -6.4°C (20.5°F) respectively.

What is the average humidity in December in Oulu?

In December, the average relative humidity in Oulu is 93%.

How many days does it rain in December in Oulu?

In December, in Oulu, the rain falls for 6.4 days. Throughout December, 44mm (1.73") of precipitation is accumulated.

How much does it snow in Oulu in December?

In December, it is snowing for 20.9 days. Throughout December, 230mm (9.06") of snow is accumulated.

How cold is the water in December in Oulu?

In Oulu, in December, the average water temperature is 2°C (35.6°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 Oulu?

December has the shortest days of the year in Oulu, with an average of 3h and 54min of daylight.

What is the average length of the day in December in Oulu?

In December, the average day length is 3h and 53min.

When is the sunrise / sunset in December in Oulu?

In December, on the first day of the month, sunrise is at 09:49 and sunset at 14:25. On the last day of the month, sunrise is at 10:25 and sunset at 14:17 EET.

What is the month with the least sunshine in Oulu?

December has the least sunshine of the year in Oulu, with an average of 1h of sunshine.

How long on average sun shines in December in Oulu?

In Oulu, the average sunshine duration in December is 1h.

What is the month with the lowest UV index in Oulu?

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

What is the UV index reading in December in Oulu?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Oulu, Finland

Average temperature in December - Oulu, Finland
  • Average high temperature in December: -3°C

The warmest month (with the highest average high temperature) is July (20°C).
The month with the lowest average high temperature is January (-6.1°C).

  • Average low temperature in December: -6.4°C

The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-10.6°C).

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Average pressure in December
Oulu, Finland

Average pressure in December - Oulu, Finland
  • Average pressure in December: 1005.4mbar

The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1005.4mbar).

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Average wind speed in December
Oulu, Finland

Average wind speed in December - Oulu, Finland
  • Average wind speed in December: 13.5km/h

The windiest month (with the highest average wind speed) is November (13.7km/h).
The calmest month (with the lowest average wind speed) is July (10.6km/h).

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Average humidity in December
Oulu, Finland

Average humidity in December - Oulu, Finland
  • Average humidity in December: 93%

The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is June (69%).

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Average rainfall in December
Oulu, Finland

Average rainfall in December - Oulu, Finland
  • Average rainfall in December: 44mm

The wettest month (with the highest rainfall) is July (59mm).
The driest months (with the least rainfall) are April and September (25mm).

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Average rainfall days in December
Oulu, Finland

Average rainfall days in December - Oulu, Finland
  • Average rainfall days in December: 6.4 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in December
Oulu, Finland

Average snowfall in December - Oulu, Finland
  • Average snowfall in December: 230mm

The month with the highest snowfall is March (232mm).
The months with the least snowfall are June, July and August (0mm).

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Average snowfall days in December
Oulu, Finland

Average snowfall days in December - Oulu, Finland
  • Average snowfall days in December: 20.9 days

The month with the highest number of snowfall days is January (21.4 days).
The months with the least snowfall days are July and August (0 days).

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Average sea temperature in December
Oulu, Finland

Average sea temperature in December - Oulu, Finland
  • Average sea temperature in December: 2°C

The best month for swimming (with the highest average sea temperature) is July (16.7°C).
The coldest months (with the lowest average sea temperature) are January and February (-0.6°C).

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

Average daylight in December / Average sunshine in December - Oulu, Finland
  • Average daylight in December: 3h and 5min

The month with the longest days is June (Average daylight: 21h and 42min).
The month with the shortest days is December (Average daylight: 3h and 54min).

  • Average sunshine in December: 1h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 0min).

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Average sunshine days in December
Oulu, Finland

Average sunshine days in December - Oulu, Finland
  • Average sunshine days in December: 7.4 days

The month with the most sunshine days is June (17 days).
The month with the least sunshine days is December (7.4 days).

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Average UV index in December
Oulu, Finland

Average UV index in December - Oulu, 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).

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Average cloud cover in December
Oulu, Finland

Average cloud cover in December - Oulu, Finland
  • Average cloud cover in December: 76

The month with the most cloud cover is February (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 43).

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Average visibility in December
Oulu, Finland

Average visibility in December - Oulu, Finland
  • Average visibility in December: 7km

The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (6km).

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Oulu, Finland

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