December weather forecast
Zagreb, Croatia

The weather in Zagreb in December is unmistakably winter-like, freezing cold, but undeniably beautiful. In a reversal of July's trends, this month records the coldest average maximum temperature at 4.6°C (40.3°F), reaffirming the peak of winter season. The daylight hours are the shortest, clocking in at 8.7 hours. The progression into January will sustain these cold conditions. Despite the low temperatures, December's festive spirit elevates the city into a place of magical winter wonderland.

Temperature

In Zagreb, the average high-temperature in December gently drops from a frosty 8.9°C (48°F) in November to an icy 4.6°C (40.3°F). The mean low-temperature during December nights is a subzero cold -1.7°C (28.9°F).

Humidity

The most humid month in Zagreb is December, with an average relative humidity of 84.8%.

Rainfall

In Zagreb, during December, the rain falls for 11 days and regularly aggregates up to 60mm (2.36") of precipitation. Throughout the year, there are 135.6 rainfall days, and 840mm (33.07") of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In December, in Zagreb, snow falls for 6.7 days. Throughout the year, in Zagreb, there are 29 snowfall days.

Daylight

The month with the shortest days in Zagreb is December, with an average of 8h and 42min of daylight.
On the first day of December in Zagreb, sunrise is at 07:17 and sunset at 16:13. On the last day of the month, sunrise is at 07:37 and sunset at 16:21 CET.

Sunshine

The month with the least sunshine is December, with an average of 1.6h of sunshine.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Zagreb, Croatia. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: In December, the maximum UV index of 1 suggests these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.