December Weather in Trilj, Croatia

Last updated: August 23, 2025

In December, the average temperature in Trilj, Croatia hovers around 8°C (46°F). Expect daily variations, with minimums dipping to -1°C (30°F) and maximums rising to 15°C (59°F). This month typically sees 230 mm (9.0 in) of precipitation spread over 16 days, and humidity levels remain high at 81%, adding to the overall dampness of the season.

December Temperature in Trilj

In December in Trilj, the average temperature is 8°C (46°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -1°C (30°F). Be prepared for cool weather and pack accordingly if you plan to travel during this time.

December Weather in Trilj: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Trilj, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trilj, December typically has an average temperature of 8°C (46°F), with highs reaching up to 15°C (59°F) and lows dropping to around -1°C (30°F).

Data source: Temperature data for Trilj generated using information from the Copernicus Climate Change Service.

December Precipitation in Trilj

In Trilj in December, the precipitation amount is 230 mm (9.0 in), falling over the course of 16 days.

December Precipitation Trends in Trilj

The chart displays monthly precipitation patterns in Trilj, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Trilj, December typically receives around 230 mm (9.0 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Trilj

In Trilj in December humidity is 81%. With an average temperature of 8°C (46°F), this humidity feels like walking through a damp blanket, making traveling uncomfortable and leading to a persistent chill that seeps into your bones.

December Average Humidity in Trilj

This chart illustrates the average monthly humidity levels in Trilj, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Trilj is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Trilj

In Trilj in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Trilj, you can visit Hourly UV Index in Trilj.

Maximum UV Index Levels in Trilj for December

The chart shows the monthly maximum UV Index (UVI) for Trilj in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Trilj typically reaches 2, which falls under the low exposure category.

Data source: Trilj December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Trilj Compares to Other Months

Weather in Trilj varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Trilj, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Trilj, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	101 mm (4.0 inches)	83%	low
February Weather	7°C (46°F)	114 mm (4.5 inches)	76%	moderate
March Weather	9°C (49°F)	100 mm (3.9 inches)	73%	high
April Weather	13°C (55°F)	89 mm (3.5 inches)	75%	high
May Weather	17°C (63°F)	84 mm (3.3 inches)	78%	very high
June Weather	22°C (71°F)	42 mm (1.6 inches)	75%	very high
July Weather	24°C (75°F)	31 mm (1.2 inches)	71%	very high
August Weather	25°C (77°F)	29 mm (1.2 inches)	65%	very high
September Weather	20°C (69°F)	92 mm (3.6 inches)	69%	high
October Weather	15°C (60°F)	109 mm (4.3 inches)	76%	moderate
November Weather	12°C (54°F)	238 mm (9.4 inches)	81%	moderate
December Weather	8°C (46°F)	230 mm (9.0 inches)	81%	low