nomadseason

December Weather in Roseville, United States

Last updated: June 24, 2025

In Roseville, United States, the average temperature in December hovers around 3°C (38°F). Temperatures can dip as low as -15°C (6°F) and peak at a warm 19°C (66°F). Expect 110 mm (4.3 in) of precipitation over about 11 days, along with a notable average humidity of 86%. Be prepared for a mix of chills and dampness!

December Temperature in Roseville

In December in Roseville, the average temperature is 3°C (38°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -15°C (6°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is essential for comfort 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 3°C (38°F), with highs reaching up to 19°C (66°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec323643536471767369584337
Data source: Temperature data for Roseville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Roseville

In Roseville in December, the precipitation amount is 110 mm (4.3 in) spread over 11 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 110 mm (4.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec8811911713814117413311310610794110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Roseville

In Roseville in December humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
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 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 Roseville, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)88 mm (3.5 inches)88%moderate
February Weather2°C (36°F)119 mm (4.7 inches)88%moderate
March Weather6°C (44°F)117 mm (4.6 inches)88%high
April Weather12°C (53°F)138 mm (5.4 inches)86%very high
May Weather18°C (64°F)141 mm (5.5 inches)82%very high
June Weather22°C (72°F)174 mm (6.9 inches)84%very high
July Weather24°C (76°F)133 mm (5.2 inches)82%very high
August Weather23°C (74°F)113 mm (4.5 inches)73%very high
September Weather20°C (69°F)106 mm (4.2 inches)73%very high
October Weather15°C (58°F)107 mm (4.2 inches)81%high
November Weather6°C (43°F)94 mm (3.7 inches)89%moderate
December Weather3°C (38°F)110 mm (4.3 inches)86%moderate

Compare Roseville's Climate with Cities Worldwide