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December Weather in California, Colombia

Last updated: August 23, 2025

In December, the average temperature in California, Colombia hovers around 16°C (61°F), with a minimum drop to 9°C (48°F) and a comfortable maximum of 22°C (71°F). Expect a generous precipitation of 312 mm (12.3 in) spread over 29 days, contributing to an average humidity level of 70%. Perfect for those who enjoy a refreshing, albeit wet, climate!

December Temperature in California

In December in California, the average temperature is 16°C (61°F), with maximums reaching 22°C (71°F) and minimums dropping as low as 9°C (48°F). This moderate climate makes it a great time for outdoor activities and exploring the local sights.

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

The chart illustrates December temperature patterns in California, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In California, December typically has an average temperature of 16°C (61°F), with highs reaching up to 22°C (71°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec606161616261616161616161
Data source: Temperature data for California 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 California

In California in December, the total precipitation amount is 312 mm (12.3 in) spread over the course of 29 days.

December Precipitation Trends in California

The chart displays monthly precipitation patterns in California, 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 California, December typically receives around 312 mm (12.3 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec178134372542800893881731549690483312
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in California

In California in December humidity is 70%. With an average temperature of 16°C (61°F), this humidity feels like a warm, damp blanket wrapping around you, making travel somewhat uncomfortable as you navigate the sticky air while trying to enjoy your surroundings.

December Average Humidity in California

This chart illustrates the average monthly humidity levels in California, 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 California is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec52%47%45%54%81%88%88%82%78%83%84%70%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in California

In California in December, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in California.

Maximum UV Index Levels in California for December

The chart shows the monthly maximum UV Index (UVI) for California 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 California typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121415161514131314131211
Data source: California 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 California Compares to Other Months

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

This table compares monthly weather conditions in California, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (60°F)178 mm (7.0 inches)52%extreme
February Weather16°C (61°F)134 mm (5.3 inches)47%extreme
March Weather16°C (61°F)372 mm (14.6 inches)45%extreme
April Weather16°C (62°F)542 mm (21.3 inches)54%extreme
May Weather17°C (62°F)800 mm (31.5 inches)81%extreme
June Weather16°C (61°F)893 mm (35.1 inches)88%extreme
July Weather16°C (61°F)881 mm (34.7 inches)88%extreme
August Weather16°C (61°F)731 mm (28.8 inches)82%extreme
September Weather16°C (61°F)549 mm (21.6 inches)78%extreme
October Weather16°C (61°F)690 mm (27.1 inches)83%extreme
November Weather16°C (61°F)483 mm (19.0 inches)83%extreme
December Weather16°C (61°F)312 mm (12.3 inches)70%extreme

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