January Weather in Foresthill, United States

Last updated: June 24, 2025

In January, the average temperature in Foresthill, United States hovers around 6°C (42°F). Expect a range where the temperature may dip as low as -7°C (20°F) or rise to a pleasant 20°C (68°F). Additionally, prepare for 253 mm (9.9 in) of precipitation spread over 11 days, contributing to an average humidity of 84%.

January Temperature in Foresthill

In January, in Foresthill, the average temperature is 6°C (42°F), with maximums reaching up to 20°C (68°F) and minimums dropping as low as -7°C (20°F). It's advisable to pack layers for your trip to ensure comfort in varying temperatures.

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

The chart illustrates January 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, January typically has an average temperature of 6°C (42°F), with highs reaching up to 20°C (68°F) and lows dropping to around -7°C (20°F).

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

January Precipitation in Foresthill

In Foresthill in January, the precipitation amount is 253 mm (9.9 in) spread over 11 days.

January Precipitation Trends in Foresthill

The chart displays monthly precipitation patterns in Foresthill, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Foresthill, January typically receives around 253 mm (9.9 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Foresthill

In Foresthill in January humidity is 84%. With an average temperature of 6°C (42°F), this humidity feels like an uncomfortable chill that seeps into your bones, making travel less enjoyable as you find yourself bundled up yet still damp, longing for warmth and comfort.

January Average Humidity in Foresthill

This chart illustrates the average monthly humidity levels in Foresthill, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Foresthill is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Foresthill

In Foresthill in January, 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 January

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

Data source: Foresthill January 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 January 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 January’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 January’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