December Weather in Foresthill, United States

Last updated: June 24, 2025

The average temperature in Foresthill, United States during December is a brisk 5°C (42°F). Expect a chilly minimum of -5°C (24°F) and a pleasant maximum reaching 21°C (71°F). This month sees 194 mm (7.6 in) of precipitation spread over 11 days, contributing to a high average humidity of 83%. Stay prepared for variations in weather!

December Temperature in Foresthill

In December in Foresthill, the average temperature is 5°C (42°F). Maximums can reach 21°C (71°F), and minimums can be as low as -5°C (24°F). This makes Foresthill a great destination for those who enjoy mild weather with a chance of cooler days, so pack accordingly for your travels!

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

The chart illustrates December temperature patterns in Foresthill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Foresthill, December typically has an average temperature of 5°C (42°F), with highs reaching up to 21°C (71°F) and lows dropping to around -5°C (24°F).

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

December Precipitation in Foresthill

In Foresthill in December, the precipitation amount is 194 mm (7.6 in) over the course of 11 days.

December Precipitation Trends in Foresthill

The chart displays monthly precipitation patterns in Foresthill, 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 Foresthill, December typically receives around 194 mm (7.6 inches) of precipitation spread over approximately 11 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 Foresthill

In Foresthill in December, humidity is 83%. With an average temperature of 5°C (42°F), this humidity feels like a heavy blanket wrapping around you, making even the simplest outdoor activities feel exhausting and uncomfortable for traveling.

December Average Humidity in Foresthill

This chart illustrates the average monthly humidity levels in Foresthill, 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 Foresthill is approximately 83%, 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 Foresthill

In Foresthill 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 Foresthill, you can check the information here.

Maximum UV Index Levels in Foresthill for December

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

Data source: Foresthill 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 Foresthill Compares to Other Months

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

This table compares monthly weather conditions in Foresthill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	253 mm (9.9 inches)	84%	moderate
February Weather	6°C (43°F)	254 mm (10.0 inches)	84%	moderate
March Weather	7°C (45°F)	262 mm (10.3 inches)	83%	very high
April Weather	11°C (52°F)	126 mm (5.0 inches)	81%	very high
May Weather	15°C (59°F)	78 mm (3.1 inches)	74%	extreme
June Weather	20°C (69°F)	14 mm (0.6 inches)	64%	extreme
July Weather	24°C (76°F)	2 mm (0.1 inches)	44%	extreme
August Weather	24°C (75°F)	4 mm (0.1 inches)	36%	very high
September Weather	20°C (68°F)	20 mm (0.8 inches)	44%	very high
October Weather	14°C (58°F)	69 mm (2.7 inches)	65%	high
November Weather	9°C (49°F)	143 mm (5.6 inches)	84%	moderate
December Weather	5°C (42°F)	194 mm (7.6 inches)	83%	moderate