January Weather in Placerville, United States

Last updated: June 24, 2025

In January, the average temperature in Placerville, United States hovers around 8°C (46°F), with temperatures ranging from a chilly -5°C (24°F) to a mild 21°C (70°F). During this month, expect 226 mm (8.9 in) of precipitation across approximately 11 days, contributing to an overall average humidity of 84%.

January Temperature in Placerville

In January in Placerville, the average temperature is 8°C (46°F). The maximum can reach 21°C (70°F) while the minimum can drop as low as -5°C (24°F). It’s advisable to pack layers to accommodate the variable weather during your travels.

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

The chart illustrates January temperature patterns in Placerville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Placerville, January typically has an average temperature of 8°C (46°F), with highs reaching up to 21°C (70°F) and lows dropping to around -5°C (24°F).

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

January Precipitation in Placerville

In Placerville in January, the total precipitation amount is 226 mm (8.9 in), occurring over the course of 11 days.

January Precipitation Trends in Placerville

The chart displays monthly precipitation patterns in Placerville, 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 Placerville, January typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 11 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 Placerville

In Placerville in January humidity is 84%. With an average temperature of 8°C (46°F), this humidity feels like a chilly mist wrapping around you, making outdoor exploration cumbersome and layering your clothing a necessity for comfort.

January Average Humidity in Placerville

This chart illustrates the average monthly humidity levels in Placerville, 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 Placerville 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 Placerville

In Placerville 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 Placerville, you can check the information here.

Maximum UV Index Levels in Placerville for January

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

Data source: Placerville 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 Placerville Compares to Other Months

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

This table compares monthly weather conditions in Placerville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	226 mm (8.9 inches)	84%	moderate
February Weather	8°C (47°F)	231 mm (9.1 inches)	84%	moderate
March Weather	9°C (49°F)	249 mm (9.8 inches)	83%	very high
April Weather	13°C (56°F)	115 mm (4.5 inches)	81%	very high
May Weather	16°C (62°F)	69 mm (2.7 inches)	74%	extreme
June Weather	22°C (72°F)	8 mm (0.3 inches)	64%	extreme
July Weather	26°C (78°F)	0 mm (0.0 inches)	44%	extreme
August Weather	25°C (77°F)	0 mm (0.0 inches)	36%	very high
September Weather	22°C (71°F)	15 mm (0.6 inches)	44%	very high
October Weather	16°C (61°F)	62 mm (2.4 inches)	65%	high
November Weather	11°C (52°F)	128 mm (5.0 inches)	84%	moderate
December Weather	7°C (45°F)	179 mm (7.1 inches)	83%	moderate