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December Weather in Roseburg, United States

Last updated: June 24, 2025

In December, the average temperature in Roseburg, United States hovers around 4°C (40°F). Expect minimums plummeting to -6°C (22°F) and highs reaching up to 19°C (66°F). Rainfall is quite prominent, with an average of 153 mm (6.0 in) spread across 16 days. Don't forget to prepare for the high humidity, which averages a steamy 87%!

December Temperature in Roseburg

In December in Roseburg, the average temperature is 4°C (40°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as -6°C (22°F). Be prepared for a mix of mild and chilly weather, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Roseburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roseburg, December typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (66°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec414145505562686862524540
Data source: Temperature data for Roseburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Roseburg

In Roseburg in December, the precipitation amount is 153 mm (6.0 in) over the course of 16 days.

December Precipitation Trends in Roseburg

The chart displays monthly precipitation patterns in Roseburg, 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 Roseburg, December typically receives around 153 mm (6.0 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec1461881291216432276475116153
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Roseburg

In Roseburg in December humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

December Average Humidity in Roseburg

This chart illustrates the average monthly humidity levels in Roseburg, 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 Roseburg is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%85%86%83%83%83%78%67%66%77%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Roseburg

In Roseburg 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 Roseburg, you can visit Hourly UV Index in Roseburg.

Maximum UV Index Levels in Roseburg for December

The chart shows the monthly maximum UV Index (UVI) for Roseburg 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 Roseburg typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098632
Data source: Roseburg 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 Roseburg Compares to Other Months

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

This table compares monthly weather conditions in Roseburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)146 mm (5.7 inches)84%moderate
February Weather5°C (41°F)188 mm (7.4 inches)85%moderate
March Weather7°C (45°F)129 mm (5.1 inches)86%high
April Weather10°C (50°F)121 mm (4.8 inches)83%very high
May Weather13°C (56°F)64 mm (2.5 inches)83%very high
June Weather17°C (62°F)32 mm (1.3 inches)83%very high
July Weather20°C (68°F)2 mm (0.1 inches)78%very high
August Weather20°C (68°F)7 mm (0.3 inches)67%very high
September Weather17°C (63°F)64 mm (2.5 inches)66%very high
October Weather11°C (53°F)75 mm (3.0 inches)77%high
November Weather7°C (46°F)116 mm (4.6 inches)87%moderate
December Weather4°C (40°F)153 mm (6.0 inches)87%low

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