December Weather in Roseville, United States

Last updated: June 24, 2025

In December, the average temperature in Roseville, United States hovers around -5°C (23°F). During this time, temperatures can dip as low as -26°C (-15°F), while occasionally reaching a maximum of 13°C (55°F). Expect about 50 mm (2.0 in) of precipitation over 7 days, coupled with a high average humidity of 84%.

December Temperature in Roseville

In December in Roseville, the average temperature is -5°C (23°F), with maximums reaching 13°C (55°F) and minimums dropping as low as -26°C (-15°F). Travelers should prepare for cold conditions and consider layering their clothing to stay warm during their visit.

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

The chart illustrates December 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, December typically has an average temperature of -5°C (23°F), with highs reaching up to 13°C (55°F) and lows dropping to around -26°C (-15°F).

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

December Precipitation in Roseville

In Roseville in December, the precipitation amount is 50 mm (2.0 in) over a span of 7 days.

December Precipitation Trends in Roseville

The chart displays monthly precipitation patterns in Roseville, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Roseville, December typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Roseville

In Roseville in December, humidity is 84%. With an average temperature of -5°C (23°F), this humidity feels like an icy blanket wrapping around you, making the cold air bite even deeper and turning travel into a brisk, challenging adventure where each breath comes with a frosty reminder of the chill.

December Average Humidity in Roseville

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

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

December UV Index in Roseville

In Roseville in December, 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 December

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

Data source: Roseville December 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 December 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 December’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 December’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