December weather forecast
Tallinn, Estonia

December wraps up the year in Tallinn with the traditional winter charm. Temperatures hover around the freezing point, with an average low of -4.2°C (24.4°F). The city lights up with festive décor as snowfall rounds off the classic winter scene. Despite being the darkest month, the magic of the festive season enlivens the short daylight hours, completing the weather cycle in Tallinn.

Temperature

In December, the average high-temperature in Tallinn marginally drops from 3.4°C (38.1°F) in November to a still icy 0.3°C (32.5°F). December's average low-temperature in Tallinn is a freezing cold -4.2°C (24.4°F), reflecting a minor difference from the day's peak temperatures.

Humidity

The months with the highest humidity in Tallinn, Estonia, are January, November and December, with an average relative humidity of 88%.

Rainfall

In Tallinn, in December, it is raining for 5 days, with typically 49mm (1.93") of accumulated precipitation. Throughout the year, in Tallinn, Estonia, there are 120 rainfall days, and 617mm (24.29") of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, in Tallinn, Estonia, snow falls for 11 days. In Tallinn, during the entire year, snow falls for 55.1 days.

Sea temperature

In December, the average sea temperature in Tallinn is 3.9°C (39°F).
Note: When swimming, this condition is immediately life-threatening. Loss of control over breathing occurs instantly, impairing clear thought. It is vital to wear a specialized swimsuit to prevent thermal loss.

Daylight

With an average of 6h and 12min of daylight, December has the shortest days of the year in Tallinn.
On the first day of December, sunrise is at 08:52 and sunset at 15:28. On the last day of the month, sunrise is at 09:18 and sunset at 15:30 EET.

Sunshine

December has the least sunshine of the year, with an average of 0.5h of sunshine.

UV index

January, November and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 0 during December morphs into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.