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, 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

December in Zagreb reveals a small adjustment in temperature, transitioning from an average high of a chilly 8.9°C in November to a wintry 4.6°C. Zagreb's nighttime temperature during December is consistently averaged at a freezing cold -1.7°C.

Humidity

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

Rainfall

In Zagreb, Croatia, in December, it is raining for 11 days, with typically 60mm of accumulated precipitation. Throughout the year, there are 135.6 rainfall days, and 840mm of precipitation is accumulated.

Snowfall

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

Daylight

With an average of 8h and 42min of daylight, December has the shortest days of the year.
On the first day of December in Zagreb, sunrise is at 07:16 and sunset at 16:13. On the last day of the month, sunrise is at 07:37 and sunset at 16:20 CET.

Sunshine

With an average of 1.6h of sunshine, December has the least sunshine of the year in Zagreb.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 1 in December translates into this advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.