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December Weather in Sunja, Croatia

Last updated: August 23, 2025

In Sunja, Croatia, the average temperature in December hovers around 4°C (39°F). Expect a minimum chill of -8°C (19°F) and a maximum warmth of 19°C (66°F). With 88 mm (3.5 in) of precipitation spread over 11 days, you might want to keep an umbrella handy. Additionally, the air is quite humid, with average humidity at a notable 88%.

December Temperature in Sunja

In December in Sunja, the average temperature is 4°C (39°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -8°C (19°F). Be sure to pack layers to comfortably enjoy the varied weather during your trip!

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

The chart illustrates December temperature patterns in Sunja, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sunja, December typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (66°F) and lows dropping to around -8°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec354146546271737364554639
Data source: Temperature data for Sunja generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Sunja

In Sunja in December, the total precipitation amount is 88 mm (3.5 in) spread over 11 days.

December Precipitation Trends in Sunja

The chart displays monthly precipitation patterns in Sunja, 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 Sunja, December typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec5170597812385878296908688
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sunja

In Sunja in December, humidity is 88%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm.

December Average Humidity in Sunja

This chart illustrates the average monthly humidity levels in Sunja, 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 Sunja is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%83%75%72%70%69%64%51%62%81%87%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sunja

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

Maximum UV Index Levels in Sunja for December

The chart shows the monthly maximum UV Index (UVI) for Sunja 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 Sunja typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987532
Data source: Sunja 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 Sunja Compares to Other Months

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

This table compares monthly weather conditions in Sunja, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)51 mm (2.0 inches)89%low
February Weather5°C (41°F)70 mm (2.7 inches)83%moderate
March Weather8°C (46°F)59 mm (2.3 inches)75%moderate
April Weather12°C (54°F)78 mm (3.1 inches)72%high
May Weather16°C (62°F)123 mm (4.8 inches)70%very high
June Weather22°C (71°F)85 mm (3.3 inches)69%very high
July Weather23°C (73°F)87 mm (3.4 inches)64%very high
August Weather23°C (73°F)82 mm (3.2 inches)51%very high
September Weather18°C (64°F)96 mm (3.8 inches)62%high
October Weather13°C (55°F)90 mm (3.5 inches)81%moderate
November Weather8°C (46°F)86 mm (3.4 inches)87%moderate
December Weather4°C (39°F)88 mm (3.5 inches)88%low

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