January weather forecast
Copenhagen, Denmark

This is the coldest month in Copenhagen, with temperatures plunging down to -1.7°C (28.9°F) at their lowest. In spite of the bone-chilling cold, the city starts to stir from its winter slumber, preparing for the coming months. The skies are usually overcast, and snowfall is frequent, adding a blanket of white to the city's landscapes. A relative humidity of 86% makes the air quite damp, and outdoor activities might require some waterproof gear. As January gives way to February, there's a slight uptick in temperatures and the promise of longer days and more sunshine.

Temperature

January is the coldest month of the year, registering average temperatures as high as 2.5°C (36.5°F) and as low as -1.7°C (28.9°F).

Humidity

With an average relative humidity of 86%, January is the most humid month in Copenhagen.

Rainfall

In January, in Copenhagen, the rain falls for 14.9 days. Throughout January, 37mm (1.46") of precipitation is accumulated. In Copenhagen, during the entire year, the rain falls for 157.4 days and collects up to 523mm (20.59") of precipitation.

Snowfall

Months with snowfall are January through April, October through December. The month with the most snowfall days is January, when snow falls for 5.9 days.

Sea temperature

In Copenhagen, the average seawater temperature in January is 2.7°C (36.9°F).
Note: Within the context of swimming, this state is extremely cold, dangerous, and can result in death. Hypothermia happens quickly in the absence of protective insulated waterproof clothing.

Daylight

In Copenhagen, the average length of the day in January is 7h and 47min.
On the first day of the month, sunrise is at 08:38 and sunset at 15:47. On the last day of January, in Copenhagen, Denmark, sunrise is at 08:05 and sunset at 16:40 CET.

Sunshine

In January, the average sunshine in Copenhagen is 1.5h.

UV index

January and December, with an average maximum UV index of 0, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 0 in January suggests the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.