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December Weather in Novo Mesto, Slovenia

Last updated: August 27, 2025

In December, the average temperature in Novo Mesto, Slovenia hovers around 3°C (37°F), with a minimum dip to -11°C (12°F) and a comfortable maximum reaching 17°C (63°F). Expect 108 mm (4.3 in) of precipitation spread over 10 days, accompanied by a high average humidity of 88%, creating a chilly yet vibrant atmosphere.

December Temperature in Novo Mesto

In December in Novo Mesto, the average temperature is 3°C (37°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -11°C (12°F). Be prepared for a range of temperatures and pack accordingly for your visit!

December Weather in Novo Mesto: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Novo Mesto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Novo Mesto, December typically has an average temperature of 3°C (37°F), with highs reaching up to 17°C (63°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec333943515968707161534437
Data source: Temperature data for Novo Mesto 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 Novo Mesto

In Novo Mesto in December, the total precipitation amount is 108 mm (4.3 in) spread over a duration of 10 days.

December Precipitation Trends in Novo Mesto

The chart displays monthly precipitation patterns in Novo Mesto, 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 Novo Mesto, December typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec53816487165105114106144103111108
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Novo Mesto

In Novo Mesto in December, humidity is 88%. With an average temperature of 3°C (37°F), this humidity feels like a chilling fog that clings to your skin, making every step outside a damp and brisk challenge for travelers.

December Average Humidity in Novo Mesto

This chart illustrates the average monthly humidity levels in Novo Mesto, 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 Novo Mesto 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 Novo Mesto

In Novo Mesto 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 Novo Mesto, you can visit Hourly UV Index in Novo Mesto.

Maximum UV Index Levels in Novo Mesto for December

The chart shows the monthly maximum UV Index (UVI) for Novo Mesto 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 Novo Mesto typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Novo Mesto 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 Novo Mesto Compares to Other Months

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

This table compares monthly weather conditions in Novo Mesto, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)53 mm (2.1 inches)89%low
February Weather4°C (39°F)81 mm (3.2 inches)83%moderate
March Weather6°C (44°F)64 mm (2.5 inches)75%moderate
April Weather11°C (52°F)87 mm (3.4 inches)72%high
May Weather15°C (59°F)165 mm (6.5 inches)70%very high
June Weather20°C (69°F)105 mm (4.1 inches)69%very high
July Weather21°C (71°F)114 mm (4.5 inches)64%very high
August Weather21°C (71°F)106 mm (4.2 inches)51%very high
September Weather16°C (61°F)144 mm (5.7 inches)62%high
October Weather12°C (53°F)103 mm (4.0 inches)81%moderate
November Weather7°C (44°F)111 mm (4.4 inches)87%moderate
December Weather3°C (37°F)108 mm (4.3 inches)88%low

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