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December Weather in San Diego, Colombia

Last updated: August 23, 2025

In San Diego, Colombia, the average temperature in December hovers around 25°C (77°F). During this time, temperatures can range from a pleasant 18°C (65°F) to a warm 32°C (90°F). Expect about 54 mm (2.1 in) of precipitation spread over 13 days, with an average humidity level of 69%. Enjoy the mild weather while being prepared for occasional showers!

December Temperature in San Diego

In December in San Diego, the average temperature is 25°C (77°F). Maximum can reach 32°C (90°F) and minimum can be as low as 18°C (65°F). This pleasant weather makes San Diego an ideal destination for travelers seeking a comfortable climate.

December Weather in San Diego: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Diego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Diego, December typically has an average temperature of 25°C (77°F), with highs reaching up to 32°C (90°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec767777777878797978777777
Data source: Temperature data for San Diego 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 San Diego

In San Diego in December, the precipitation amount is 54 mm (2.1 in), falling over the course of 13 days.

December Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, 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 San Diego, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec513319542961541728740148853129154
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Diego

In San Diego in December humidity is 69%. With an average temperature of 25°C (77°F), this humidity feels like a warm, heavy blanket enveloping you, making every step feel slightly sluggish and encouraging frequent breaks to enjoy refreshing beverages and cool breezes.

December Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, 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 San Diego is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%65%64%64%65%77%85%85%84%82%79%69%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Diego

In San Diego 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 San Diego.

Maximum UV Index Levels in San Diego for December

The chart shows the monthly maximum UV Index (UVI) for San Diego 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 San Diego typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121315151513131413141111
Data source: San Diego 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 San Diego Compares to Other Months

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

This table compares monthly weather conditions in San Diego, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)51 mm (2.0 inches)65%extreme
February Weather25°C (77°F)33 mm (1.3 inches)65%extreme
March Weather25°C (77°F)195 mm (7.7 inches)64%extreme
April Weather25°C (78°F)429 mm (16.9 inches)64%extreme
May Weather26°C (78°F)615 mm (24.2 inches)65%extreme
June Weather26°C (79°F)417 mm (16.4 inches)77%extreme
July Weather26°C (79°F)287 mm (11.3 inches)85%extreme
August Weather26°C (79°F)401 mm (15.8 inches)85%extreme
September Weather25°C (78°F)488 mm (19.2 inches)84%extreme
October Weather25°C (77°F)531 mm (20.9 inches)82%extreme
November Weather25°C (77°F)291 mm (11.5 inches)79%extreme
December Weather25°C (77°F)54 mm (2.1 inches)69%extreme

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