December Weather in Alpine, United States

Last updated: June 24, 2025

In Alpine, United States, the average temperature in December hovers around -7°C (20°F), with minimums plunging to -21°C (-5°F) and maximums reaching a brisk 7°C (44°F). Expect damp weather, as precipitation averages 88 mm (3.5 in) over 15 days, accompanied by high humidity levels averaging 91%. Whether you're layering up or braving the chill, be prepared for the wintry season!

December Temperature in Alpine

In December in Alpine, the average temperature is -7°C (20°F), with maximums reaching 7°C (44°F) and minimums dipping as low as -21°C (-5°F). Travelers should be prepared for cold conditions and pack accordingly.

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

The chart illustrates December temperature patterns in Alpine, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alpine, December typically has an average temperature of -7°C (20°F), with highs reaching up to 7°C (44°F) and lows dropping to around -21°C (-5°F).

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

December Precipitation in Alpine

In Alpine in December, the precipitation amount is 88 mm (3.5 in) over a span of 15 days.

December Precipitation Trends in Alpine

The chart displays monthly precipitation patterns in Alpine, 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 Alpine, December typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 15 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 Alpine

In Alpine in December humidity is 91%. With an average temperature of -7°C (20°F), this humidity feels like an icy embrace that clings to your skin, making travel uncomfortable and challenging as every breath feels damp and heavy in the frigid air.

December Average Humidity in Alpine

This chart illustrates the average monthly humidity levels in Alpine, 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 Alpine is approximately 91%, 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 Alpine

In Alpine 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 Alpine, you can check the information here.

Maximum UV Index Levels in Alpine for December

The chart shows the monthly maximum UV Index (UVI) for Alpine 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 Alpine typically reaches 3, which falls under the moderate exposure category.

Data source: Alpine 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 Alpine Compares to Other Months

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

This table compares monthly weather conditions in Alpine, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	87 mm (3.4 inches)	95%	moderate
February Weather	-6°C (21°F)	135 mm (5.3 inches)	95%	moderate
March Weather	-1°C (30°F)	70 mm (2.8 inches)	90%	very high
April Weather	1°C (34°F)	94 mm (3.7 inches)	81%	very high
May Weather	5°C (41°F)	63 mm (2.5 inches)	71%	extreme
June Weather	13°C (55°F)	53 mm (2.1 inches)	64%	extreme
July Weather	18°C (64°F)	20 mm (0.8 inches)	59%	extreme
August Weather	17°C (62°F)	27 mm (1.1 inches)	49%	extreme
September Weather	11°C (53°F)	53 mm (2.1 inches)	52%	very high
October Weather	3°C (37°F)	65 mm (2.6 inches)	69%	high
November Weather	-3°C (27°F)	87 mm (3.4 inches)	86%	moderate
December Weather	-7°C (20°F)	88 mm (3.5 inches)	91%	moderate