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December Weather in Glen Ellen, United States

Last updated: June 24, 2025

In December, the average temperature in Glen Ellen, United States hovers around 10°C (50°F), with a minimum of 0°C (33°F) and a pleasant maximum of 23°C (73°F). Be prepared for some rain, as precipitation can reach 94 mm (3.7 in) over 9 days, contributing to an average humidity of a cozy 84%.

December Temperature in Glen Ellen

In December in Glen Ellen, the average temperature is 10°C (50°F), with maximums reaching up to 23°C (73°F) and minimums dropping as low as 0°C (33°F). This makes it a great time to explore Glen Ellen while enjoying mild weather conditions.

December Weather in Glen Ellen: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Glen Ellen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glen Ellen, December typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (73°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec505253586267686867635449
Data source: Temperature data for Glen Ellen 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 Glen Ellen

In Glen Ellen in December, the precipitation amount reaches 94 mm (3.7 in) over the course of 9 days.

December Precipitation Trends in Glen Ellen

The chart displays monthly precipitation patterns in Glen Ellen, 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 Glen Ellen, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1251278436211101335194
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Glen Ellen

In Glen Ellen in December, humidity is 84%. With an average temperature of 10°C (50°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less comfortable and prompting travelers to seek refuge in cozy, warm cafes or indoor attractions.

December Average Humidity in Glen Ellen

This chart illustrates the average monthly humidity levels in Glen Ellen, 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 Glen Ellen is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%80%76%70%66%68%72%84%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Glen Ellen

In Glen Ellen 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 Glen Ellen, you can check the information here.

Maximum UV Index Levels in Glen Ellen for December

The chart shows the monthly maximum UV Index (UVI) for Glen Ellen 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 Glen Ellen typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Glen Ellen 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 Glen Ellen Compares to Other Months

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

This table compares monthly weather conditions in Glen Ellen, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)125 mm (4.9 inches)86%moderate
February Weather11°C (52°F)127 mm (5.0 inches)84%moderate
March Weather12°C (54°F)84 mm (3.3 inches)83%high
April Weather14°C (58°F)36 mm (1.4 inches)80%very high
May Weather17°C (62°F)21 mm (0.8 inches)80%very high
June Weather20°C (68°F)1 mm (0.1 inches)76%extreme
July Weather20°C (68°F)0 mm (0.0 inches)70%extreme
August Weather20°C (68°F)0 mm (0.0 inches)66%very high
September Weather20°C (68°F)1 mm (0.0 inches)68%very high
October Weather17°C (63°F)33 mm (1.3 inches)72%high
November Weather12°C (55°F)50 mm (2.0 inches)84%moderate
December Weather10°C (50°F)94 mm (3.7 inches)84%moderate

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