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December Weather in Garrison, United States

Last updated: June 24, 2025

In December, the average temperature in Garrison, United States dips to a chilly -7°C (20°F). While the mercury can plunge as low as -36°C (-33°F), temperatures may also reach up to a mild 12°C (54°F). Expect 21 mm (0.8 in) of precipitation spread over about 5 days, and brace yourself for an average humidity of 84%. Stay warm and prepare for the elements!

December Temperature in Garrison

In December in Garrison, the average temperature is -7°C (20°F), with maximums reaching 12°C (54°F) and minimums plummeting to -36°C (-33°F). It's essential to prepare for a range of temperatures when traveling to Garrison during this time.

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

The chart illustrates December temperature patterns in Garrison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Garrison, December typically has an average temperature of -7°C (20°F), with highs reaching up to 12°C (54°F) and lows dropping to around -36°C (-33°F).
JanFebMarAprMayJunJulAugSepOctNovDec121027375467726859422919
Data source: Temperature data for Garrison 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 Garrison

In Garrison in December, the precipitation amount is 21 mm (0.8 in) spread over a period of 5 days.

December Precipitation Trends in Garrison

The chart displays monthly precipitation patterns in Garrison, 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 Garrison, December typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec131626263966635768402121
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Garrison

In Garrison in December, humidity is 84%. With an average temperature of -7°C (20°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

December Average Humidity in Garrison

This chart illustrates the average monthly humidity levels in Garrison, 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 Garrison is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%88%78%75%76%79%78%78%69%71%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Garrison

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

Maximum UV Index Levels in Garrison for December

The chart shows the monthly maximum UV Index (UVI) for Garrison 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 Garrison typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245989987532
Data source: Garrison 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 Garrison Compares to Other Months

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

This table compares monthly weather conditions in Garrison, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (12°F)13 mm (0.5 inches)84%low
February Weather-12°C (10°F)16 mm (0.6 inches)88%moderate
March Weather-3°C (28°F)26 mm (1.0 inches)78%moderate
April Weather3°C (38°F)26 mm (1.0 inches)75%very high
May Weather12°C (54°F)39 mm (1.5 inches)76%very high
June Weather19°C (67°F)66 mm (2.6 inches)79%very high
July Weather22°C (72°F)63 mm (2.5 inches)78%very high
August Weather20°C (68°F)57 mm (2.2 inches)78%very high
September Weather15°C (59°F)68 mm (2.7 inches)69%high
October Weather6°C (43°F)40 mm (1.6 inches)71%moderate
November Weather-2°C (29°F)21 mm (0.8 inches)82%moderate
December Weather-7°C (20°F)21 mm (0.8 inches)84%low

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