December weather forecastRijeka, Croatia

Weather in December

Rijeka concludes the year with December showcasing a potent blend of cold and wet climatic conditions. The city's architecture shimmers under the vivid winter sun, creating an enchanting backdrop. Decreased sunlight hours mark the winter solstice, and the city lights lead the festive spirit. Rainfall is slightly lower than November but still remains relatively high at 156mm (6.14"). Despite the low sea temperature, the unmistakable charm of Rijeka during December makes it a memorable month.

Temperature

December in Rijeka brings a slight decrease in the average high-temperature, shifting from a moderate 13.2°C (55.8°F) in November to a cool 10.1°C (50.2°F). Rijeka's nights in December cool down to an average low-temperature of 4°C (39.2°F).

Humidity

In December, the average relative humidity in Rijeka is 66.4%.

Rainfall

In Rijeka, during December, the rain falls for 11.2 days and regularly aggregates up to 156mm (6.14") of precipitation. Throughout the year, in Rijeka, there are 130.3 rainfall days, and 1552mm (61.1") of precipitation is accumulated.

Snowfall

January through March and December are months with snowfall in Rijeka. December is the first month it typically snows. Throughout December, there are 0.1 snowfall days. In Rijeka, during the entire year, snow falls for 1.4 days.

Sea temperature

In Rijeka, Croatia, in December, the average water temperature is 14.3°C (57.7°F).
Note: Swimming in 14.3°C (57.7°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 07:21 and sunset at 16:21. On the last day of the month, sunrise is at 07:41 and sunset at 16:29 CET.

Sunshine

With an average of 3.2h of sunshine, December has the least sunshine of the year.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.