December Weather in Alpine, United States

Last updated: June 24, 2025

In December, the average temperature in Alpine, United States hovers around 9°C (49°F), with a range that can dip as low as -12°C (11°F) and peak at 25°C (77°F). Visitors can expect 21 mm (0.8 in) of precipitation over approximately 2 days, while the average humidity lingers at a high 85%. Be prepared for a mix of cool and mild weather!

December Temperature in Alpine

In December in Alpine, the average temperature is 9°C (49°F). Maximum temperatures can reach 25°C (77°F), while minimums can drop as low as -12°C (11°F). Travelers should be prepared for a wide range of temperatures, from chilly to pleasantly warm, so layering clothing is recommended.

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 9°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -12°C (11°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 21 mm (0.8 in) over a period of 2 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 21 mm (0.8 inches) of precipitation spread over approximately 2 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 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.

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 85%, 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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Alpine.

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 5, 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 (46°F)	12 mm (0.5 inches)	76%	moderate
February Weather	10°C (51°F)	9 mm (0.3 inches)	74%	very high
March Weather	15°C (59°F)	14 mm (0.6 inches)	63%	very high
April Weather	19°C (66°F)	12 mm (0.5 inches)	61%	extreme
May Weather	24°C (75°F)	16 mm (0.6 inches)	68%	extreme
June Weather	26°C (80°F)	31 mm (1.2 inches)	70%	extreme
July Weather	26°C (79°F)	38 mm (1.5 inches)	70%	extreme
August Weather	26°C (78°F)	44 mm (1.7 inches)	67%	extreme
September Weather	23°C (73°F)	38 mm (1.5 inches)	74%	extreme
October Weather	18°C (65°F)	19 mm (0.8 inches)	75%	very high
November Weather	13°C (56°F)	7 mm (0.3 inches)	84%	high
December Weather	9°C (49°F)	21 mm (0.8 inches)	85%	moderate