December weather forecast
Zagreb, Croatia

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The iconic buildings of the cathedral in Zagreb, Croatia in an early autumn morning
The iconic buildings of the cathedral in Zagreb, Croatia in an early autumn morning

Weather in December

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.

Frequently asked questions

Is it cold in Zagreb during December?

In Zagreb, in December, the average high-temperature is 4.6°C (40.3°F), and the average low-temperature is -1.7°C (28.9°F).

What is the most humid month in Zagreb?

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

What is the average humidity in December in Zagreb?

In December, the average relative humidity in Zagreb, Croatia, is 84.8%.

How much does it rain in Zagreb in December?

In Zagreb, in December, during 11 rainfall days, 60mm (2.36") of precipitation is typically accumulated.

How many days does it snow in December in Zagreb?

In December, in Zagreb, Croatia, snow falls for 6.7 days.

What is the month with the shortest days in Zagreb?

With an average of 8h and 42min of daylight, December has the shortest days of the year in Zagreb.

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

The average day length in December in Zagreb, Croatia, is 8h and 44min.

What time are sunrise and sunset in December in Zagreb?

In December, on the first day of the month, 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.

What is the month with the least sunshine in Zagreb?

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

How many hours of sunshine does Zagreb have in December?

In December, the average sunshine duration in Zagreb is 1.6h.

When is the lowest UV index in Zagreb?

January, 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 Zagreb?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Zagreb, Croatia

Average temperature in December - Zagreb, Croatia
  • Average high temperature in December: 4.6°C

The warmest month (with the highest average high temperature) is July (26.7°C).
The month with the lowest average high temperature is January (3.7°C).

  • Average low temperature in December: -1.7°C

The month with the highest average low temperature is July (14.7°C).
The coldest month (with the lowest average low temperature) is January (-3°C).

Average humidity in December
Zagreb, Croatia

Average humidity in December - Zagreb, Croatia
  • Average humidity in December: 84.8%

The month with the highest relative humidity is December (84.8%).
The month with the lowest relative humidity is April (67.5%).

Average rainfall in December
Zagreb, Croatia

Average rainfall in December - Zagreb, Croatia
  • Average rainfall in December: 59.6mm

The wettest month (with the highest rainfall) is June (95.3mm).
The driest month (with the least rainfall) is February (38.9mm).

Average rainfall days in December
Zagreb, Croatia

Average rainfall days in December - Zagreb, Croatia
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is June (13.7 days).
The month with the least rainy days is February (9.4 days).

Average snowfall days in December
Zagreb, Croatia

Average snowfall days in December - Zagreb, Croatia
  • Average snowfall days in December: 6.7 days

The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Zagreb, Croatia

Average daylight in December / Average sunshine in December - Zagreb, Croatia
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in December: 1h and 4min

The month with the most sunshine is July (Average sunshine: 8h and 54min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).

Average UV index in December
Zagreb, Croatia

Average UV index in December - Zagreb, Croatia
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are January, November and December (UV index 1).

Zagreb, Croatia

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