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December Weather in McComb, United States

Last updated: June 24, 2025

In December, the average temperature in McComb, United States hovers around 2°C (35°F). Prepare for a wide range of temperatures, with minimums dipping as low as -22°C (-8°F) and maximums reaching 17°C (63°F). Expect about 64 mm (2.5 in) of precipitation over 11 days, and brace yourself for high humidity levels averaging 86%.

December Temperature in McComb

In December in McComb, the average temperature is 2°C (35°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -22°C (-8°F). Be prepared for a wide range of temperatures, making it essential to dress in layers for your travels.

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

The chart illustrates December temperature patterns in McComb, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McComb, December typically has an average temperature of 2°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -22°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec293141506272757368574135
Data source: Temperature data for McComb 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 McComb

In McComb in December, the total precipitation amount is 64 mm (2.5 in) spread over 11 days.

December Precipitation Trends in McComb

The chart displays monthly precipitation patterns in McComb, 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 McComb, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7285951031361251128770918764
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in McComb

In McComb in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in McComb

This chart illustrates the average monthly humidity levels in McComb, 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 McComb is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in McComb

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

Maximum UV Index Levels in McComb for December

The chart shows the monthly maximum UV Index (UVI) for McComb 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 McComb typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: McComb 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 McComb Compares to Other Months

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

This table compares monthly weather conditions in McComb, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)72 mm (2.8 inches)88%moderate
February Weather0°C (32°F)85 mm (3.3 inches)87%moderate
March Weather5°C (41°F)95 mm (3.7 inches)87%high
April Weather10°C (50°F)103 mm (4.1 inches)87%very high
May Weather17°C (63°F)136 mm (5.3 inches)81%very high
June Weather22°C (72°F)125 mm (4.9 inches)82%very high
July Weather24°C (76°F)112 mm (4.4 inches)81%very high
August Weather23°C (73°F)87 mm (3.4 inches)78%very high
September Weather20°C (68°F)70 mm (2.7 inches)78%very high
October Weather14°C (57°F)91 mm (3.6 inches)82%high
November Weather5°C (42°F)87 mm (3.4 inches)89%moderate
December Weather2°C (35°F)64 mm (2.5 inches)86%low

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