January Weather in Folsom, United States

Last updated: June 24, 2025

The average temperature in Folsom, United States during January is a cool 11°C (52°F). Expect temperatures to fluctuate, with a minimum of -10°C (14°F) and a maximum reaching 28°C (82°F). The month typically sees about 122 mm (4.8 in) of precipitation spread over 8 days, resulting in an average humidity of 83%. Prepare for a mix of weather!

January Temperature in Folsom

In January in Folsom, the average temperature is 11°C (52°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as -10°C (14°F). Be prepared for a wide range of temperatures to fully enjoy your travel experience.

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

The chart illustrates January temperature patterns in Folsom, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Folsom, January typically has an average temperature of 11°C (52°F), with highs reaching up to 28°C (82°F) and lows dropping to around -10°C (14°F).

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

January Precipitation in Folsom

In Folsom in January, the precipitation amount is 122 mm (4.8 in) spread over 8 days.

January Precipitation Trends in Folsom

The chart displays monthly precipitation patterns in Folsom, 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 Folsom, January typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 8 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 Folsom

In Folsom in January humidity is 83%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, often leading travelers to seek shelter indoors or to dress in layered clothing to stay warm while exploring the area.

January Average Humidity in Folsom

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

In Folsom in January, 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 Folsom.

Maximum UV Index Levels in Folsom for January

The chart shows the monthly maximum UV Index (UVI) for Folsom 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 Folsom typically reaches 5, which falls under the moderate exposure category.

Data source: Folsom 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 Folsom Compares to Other Months

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

This table compares monthly weather conditions in Folsom, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	122 mm (4.8 inches)	83%	moderate
February Weather	14°C (58°F)	125 mm (4.9 inches)	83%	very high
March Weather	17°C (63°F)	93 mm (3.7 inches)	80%	very high
April Weather	19°C (67°F)	151 mm (5.9 inches)	81%	extreme
May Weather	24°C (75°F)	162 mm (6.4 inches)	81%	extreme
June Weather	26°C (80°F)	176 mm (6.9 inches)	78%	extreme
July Weather	27°C (81°F)	181 mm (7.1 inches)	79%	extreme
August Weather	27°C (81°F)	235 mm (9.3 inches)	79%	extreme
September Weather	26°C (79°F)	140 mm (5.5 inches)	79%	very high
October Weather	22°C (71°F)	118 mm (4.7 inches)	77%	very high
November Weather	15°C (59°F)	81 mm (3.2 inches)	85%	high
December Weather	13°C (55°F)	135 mm (5.3 inches)	88%	moderate