December Weather in Garrison, United States

Last updated: June 24, 2025

In December, the average temperature in Garrison, United States is a cool 4°C (40°F), with extremes ranging from a brisk -13°C (9°F) to a mild 20°C (69°F). Expect 118 mm (4.7 in) of precipitation over approximately 10 days, contributing to an average humidity of 87%. Prepare for a mix of chilly days and refreshing moisture as you navigate the month!

December Temperature in Garrison

In December in Garrison, the average temperature is 4°C (40°F). Maximums can reach 20°C (69°F), while minimums can be as low as -13°C (9°F). Be prepared for a wide range of temperatures if you're planning to travel 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 4°C (40°F), with highs reaching up to 20°C (69°F) and lows dropping to around -13°C (9°F).

Data source: Temperature data for Garrison generated using information from the Copernicus Climate Change Service.

December Precipitation in Garrison

In Garrison in December, the precipitation amount is 118 mm (4.7 in) over a span of 10 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 118 mm (4.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Garrison

In Garrison in December humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

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 87%, offering insight into how humid the weather typically is during this month.

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 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 Garrison, you can check the information here.

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 3, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	91 mm (3.6 inches)	88%	moderate
February Weather	4°C (40°F)	130 mm (5.1 inches)	88%	moderate
March Weather	8°C (47°F)	113 mm (4.4 inches)	87%	high
April Weather	13°C (55°F)	133 mm (5.3 inches)	85%	very high
May Weather	19°C (66°F)	133 mm (5.2 inches)	81%	very high
June Weather	22°C (73°F)	175 mm (6.9 inches)	82%	very high
July Weather	25°C (77°F)	119 mm (4.7 inches)	81%	very high
August Weather	24°C (75°F)	122 mm (4.8 inches)	73%	very high
September Weather	21°C (70°F)	114 mm (4.5 inches)	73%	very high
October Weather	15°C (60°F)	118 mm (4.6 inches)	78%	high
November Weather	7°C (45°F)	80 mm (3.1 inches)	89%	moderate
December Weather	4°C (40°F)	118 mm (4.7 inches)	87%	moderate