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December Weather in Karlovo, Bulgaria

Last updated: August 22, 2025

In December, the average temperature in Karlovo, Bulgaria hovers around 2°C (36°F). Expect chilly nights with minimums dropping to -13°C (8°F), while daytime highs can reach up to 14°C (57°F). This month also brings 81 mm (3.2 in) of precipitation over approximately 12 days, creating a notably damp environment with an average humidity of 89%.

December Temperature in Karlovo

In December in Karlovo, the average temperature is 2°C (36°F). Maximums can reach 14°C (57°F), and minimums can drop as low as -13°C (8°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

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

The chart illustrates December temperature patterns in Karlovo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Karlovo, December typically has an average temperature of 2°C (36°F), with highs reaching up to 14°C (57°F) and lows dropping to around -13°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec313640495864686962524335
Data source: Temperature data for Karlovo 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 Karlovo

In Karlovo in December, the precipitation amount is 81 mm (3.2 in) over a span of 12 days.

December Precipitation Trends in Karlovo

The chart displays monthly precipitation patterns in Karlovo, 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 Karlovo, December typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec565789691211671576042675581
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Karlovo

In Karlovo in December, humidity is 89%. With an average temperature of 2°C (36°F), this humidity feels like an uncomfortable chill that clings to your skin, making outdoor activities feel even colder and less inviting for traveling.

December Average Humidity in Karlovo

This chart illustrates the average monthly humidity levels in Karlovo, 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 Karlovo is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%85%83%71%73%67%68%50%59%79%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Karlovo

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

Maximum UV Index Levels in Karlovo for December

The chart shows the monthly maximum UV Index (UVI) for Karlovo 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 Karlovo typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24789101097632
Data source: Karlovo 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 Karlovo Compares to Other Months

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

This table compares monthly weather conditions in Karlovo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)56 mm (2.2 inches)89%low
February Weather2°C (36°F)57 mm (2.2 inches)85%moderate
March Weather5°C (40°F)89 mm (3.5 inches)83%high
April Weather9°C (49°F)69 mm (2.7 inches)71%very high
May Weather14°C (58°F)121 mm (4.8 inches)73%very high
June Weather18°C (64°F)167 mm (6.6 inches)67%very high
July Weather20°C (68°F)157 mm (6.2 inches)68%very high
August Weather21°C (70°F)60 mm (2.3 inches)50%very high
September Weather17°C (62°F)42 mm (1.7 inches)59%high
October Weather11°C (52°F)67 mm (2.6 inches)79%high
November Weather6°C (43°F)55 mm (2.2 inches)87%moderate
December Weather2°C (36°F)81 mm (3.2 inches)89%low

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