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December Weather in Columbia, United States

Last updated: June 24, 2025

In December, the average temperature in Columbia, United States hovers around 9°C (49°F). Expect daily variations, with a minimum plunging to -5°C (23°F) and a maximum reaching 23°C (73°F). Precipitation is notable, averaging 119 mm (4.7 in) over 10 days, while the air remains quite humid at an average of 84%.

December Temperature in Columbia

In December in Columbia, the average temperature is 9°C (49°F). Maximum temperatures can reach 23°C (73°F), while minimums can drop as low as -5°C (23°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Columbia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Columbia, December typically has an average temperature of 9°C (49°F), with highs reaching up to 23°C (73°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec444952617076807975675449
Data source: Temperature data for Columbia 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 Columbia

In Columbia in December, the total precipitation amount is 119 mm (4.7 in) over the span of 10 days.

December Precipitation Trends in Columbia

The chart displays monthly precipitation patterns in Columbia, 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 Columbia, December typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec961087210212215114818212994101119
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Columbia

In Columbia in December, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

December Average Humidity in Columbia

This chart illustrates the average monthly humidity levels in Columbia, 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 Columbia is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%81%80%80%81%82%83%83%80%80%83%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Columbia

In Columbia in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Columbia, you can check the information here.

Maximum UV Index Levels in Columbia for December

The chart shows the monthly maximum UV Index (UVI) for Columbia 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 Columbia typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111011109853
Data source: Columbia 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 Columbia Compares to Other Months

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

This table compares monthly weather conditions in Columbia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)96 mm (3.8 inches)84%moderate
February Weather9°C (49°F)108 mm (4.3 inches)81%high
March Weather11°C (52°F)72 mm (2.8 inches)80%very high
April Weather16°C (62°F)102 mm (4.0 inches)80%very high
May Weather21°C (70°F)122 mm (4.8 inches)81%extreme
June Weather25°C (76°F)151 mm (6.0 inches)82%very high
July Weather27°C (80°F)148 mm (5.8 inches)83%extreme
August Weather26°C (80°F)182 mm (7.1 inches)82%very high
September Weather24°C (76°F)129 mm (5.1 inches)80%very high
October Weather19°C (67°F)94 mm (3.7 inches)79%very high
November Weather12°C (55°F)101 mm (4.0 inches)83%moderate
December Weather9°C (49°F)119 mm (4.7 inches)84%moderate

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