January Weather in Forestville, United States

Last updated: June 24, 2025

In January, the average temperature in Forestville, United States hovers around -2°C (29°F), with extremes ranging from a chilly -19°C (-1°F) to a milder 14°C (57°F). During this time, expect 106 mm (4.2 in) of precipitation spread over 17 days, contributing to the notably high average humidity of 91%.

January Temperature in Forestville

In January in Forestville, the average temperature is -2°C (29°F), with a maximum that can reach 14°C (57°F) and a minimum that can drop as low as -19°C (-1°F). Be prepared for cold weather and pack accordingly when traveling to Forestville during this time.

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

The chart illustrates January temperature patterns in Forestville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forestville, January typically has an average temperature of -2°C (29°F), with highs reaching up to 14°C (57°F) and lows dropping to around -19°C (-1°F).

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

January Precipitation in Forestville

In Forestville in January, the precipitation amount is 106 mm (4.2 in) spread over 17 days.

January Precipitation Trends in Forestville

The chart displays monthly precipitation patterns in Forestville, 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 Forestville, January typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Forestville

In Forestville in January, humidity is 91%. With an average temperature of -2°C (29°F), this humidity feels like a chilling embrace that can quickly sap your energy, making outdoor adventures uncomfortable and dampening the joy of exploration.

January Average Humidity in Forestville

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

In Forestville 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 Forestville, you can check the information here.

Maximum UV Index Levels in Forestville for January

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

Data source: Forestville 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 Forestville Compares to Other Months

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

This table compares monthly weather conditions in Forestville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	106 mm (4.2 inches)	91%	moderate
February Weather	-1°C (30°F)	108 mm (4.3 inches)	91%	moderate
March Weather	1°C (34°F)	101 mm (4.0 inches)	88%	high
April Weather	5°C (42°F)	125 mm (4.9 inches)	88%	very high
May Weather	12°C (53°F)	117 mm (4.6 inches)	82%	very high
June Weather	18°C (64°F)	113 mm (4.4 inches)	79%	very high
July Weather	22°C (71°F)	135 mm (5.3 inches)	77%	very high
August Weather	21°C (71°F)	91 mm (3.6 inches)	72%	very high
September Weather	19°C (66°F)	86 mm (3.4 inches)	76%	very high
October Weather	13°C (56°F)	169 mm (6.7 inches)	83%	high
November Weather	5°C (42°F)	141 mm (5.5 inches)	88%	moderate
December Weather	1°C (35°F)	139 mm (5.5 inches)	87%	low