January Weather in Roseville, United States

Last updated: June 24, 2025

The average temperature in Roseville, United States during January hovers around -9°C (17°F). Temperatures can drop as low as -34°C (-28°F) or rise to a maximum of 6°C (44°F). Expect precipitation of approximately 27 mm (1.0 in) spread over 5 days, along with an average humidity level of 87%.

January Temperature in Roseville

In January in Roseville, the average temperature is -9°C (17°F), with maximums reaching 6°C (44°F) and minimums plummeting to -34°C (-28°F). Travelers should prepare for extreme cold and dress warmly to fully enjoy their visit to Roseville during this time.

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

The chart illustrates January temperature patterns in Roseville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roseville, January typically has an average temperature of -9°C (17°F), with highs reaching up to 6°C (44°F) and lows dropping to around -34°C (-28°F).

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

January Precipitation in Roseville

In Roseville in January, the precipitation amount is 27 mm (1.0 in) over a span of 5 days.

January Precipitation Trends in Roseville

The chart displays monthly precipitation patterns in Roseville, 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 Roseville, January typically receives around 27 mm (1.0 inches) of precipitation spread over approximately 5 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 Roseville

In Roseville in January humidity is 87%. With an average temperature of -9°C (17°F), this humidity feels like an icy blanket wrapping around you, making travel particularly challenging as the cold air combines with the moisture to create a biting chill that seeps into your bones.

January Average Humidity in Roseville

This chart illustrates the average monthly humidity levels in Roseville, 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 Roseville is approximately 87%, 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 Roseville

In Roseville in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Roseville, you can visit Hourly UV Index in Roseville.

Maximum UV Index Levels in Roseville for January

The chart shows the monthly maximum UV Index (UVI) for Roseville 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 Roseville typically reaches 2, which falls under the low exposure category.

Data source: Roseville 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 Roseville Compares to Other Months

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

This table compares monthly weather conditions in Roseville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (17°F)	27 mm (1.0 inches)	87%	low
February Weather	-8°C (17°F)	33 mm (1.3 inches)	90%	moderate
March Weather	0°C (33°F)	56 mm (2.2 inches)	85%	moderate
April Weather	6°C (43°F)	87 mm (3.4 inches)	84%	high
May Weather	15°C (59°F)	126 mm (5.0 inches)	78%	very high
June Weather	22°C (72°F)	86 mm (3.4 inches)	80%	very high
July Weather	24°C (75°F)	104 mm (4.1 inches)	81%	very high
August Weather	22°C (71°F)	135 mm (5.3 inches)	81%	very high
September Weather	18°C (64°F)	115 mm (4.5 inches)	81%	high
October Weather	9°C (49°F)	98 mm (3.9 inches)	84%	moderate
November Weather	1°C (33°F)	35 mm (1.4 inches)	88%	moderate
December Weather	-5°C (23°F)	50 mm (2.0 inches)	84%	low