December Weather in Sinj, Croatia

Last updated: August 23, 2025

In December, the average temperature in Sinj, Croatia hovers around 4°C (39°F), with a chilly minimum of -9°C (16°F) and a comfortable maximum reaching 13°C (56°F). Expect 248 mm (9.8 in) of precipitation over approximately 15 days, contributing to an average humidity of 81%. Be prepared for both the crisp air and the dampness as you experience the season!

December Temperature in Sinj

In December in Sinj, the average temperature is 4°C (39°F). Maximums can reach 13°C (56°F), while minimums can drop as low as -9°C (16°F). Be prepared for chilly conditions and pack layers if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Sinj, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sinj, December typically has an average temperature of 4°C (39°F), with highs reaching up to 13°C (56°F) and lows dropping to around -9°C (16°F).

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

December Precipitation in Sinj

In Sinj in December, the total precipitation amount is 248 mm (9.8 in) distributed over a span of 15 days.

December Precipitation Trends in Sinj

The chart displays monthly precipitation patterns in Sinj, 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 Sinj, December typically receives around 248 mm (9.8 inches) of precipitation spread over approximately 15 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 Sinj

In Sinj in December, humidity is 81%. With an average temperature of 4°C (39°F), this humidity feels like a chilling dampness that penetrates even the warmest layers of clothing, making outdoor exploration uncomfortable and prompting travelers to seek refuge indoors.

December Average Humidity in Sinj

This chart illustrates the average monthly humidity levels in Sinj, 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 Sinj 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 Sinj

In Sinj 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 Sinj, you can visit Hourly UV Index in Sinj.

Maximum UV Index Levels in Sinj for December

The chart shows the monthly maximum UV Index (UVI) for Sinj 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 Sinj typically reaches 2, which falls under the low exposure category.

Data source: Sinj 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 Sinj Compares to Other Months

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

This table compares monthly weather conditions in Sinj, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	111 mm (4.4 inches)	83%	low
February Weather	4°C (40°F)	139 mm (5.5 inches)	76%	moderate
March Weather	6°C (43°F)	121 mm (4.8 inches)	73%	high
April Weather	10°C (50°F)	113 mm (4.4 inches)	75%	high
May Weather	14°C (58°F)	125 mm (4.9 inches)	78%	very high
June Weather	19°C (67°F)	68 mm (2.7 inches)	75%	very high
July Weather	22°C (71°F)	55 mm (2.2 inches)	71%	very high
August Weather	22°C (72°F)	52 mm (2.0 inches)	65%	very high
September Weather	17°C (63°F)	105 mm (4.1 inches)	69%	high
October Weather	12°C (54°F)	128 mm (5.1 inches)	76%	moderate
November Weather	8°C (47°F)	245 mm (9.6 inches)	81%	moderate
December Weather	4°C (39°F)	248 mm (9.8 inches)	81%	low