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December Weather in Redwood, United States

Last updated: June 24, 2025

In December, the average temperature in Redwood, United States hovers around -2°C (28°F). During this time, you might experience temperatures as low as -27°C (-17°F) and occasionally reach a high of 16°C (61°F). Expect 98 mm (3.8 in) of precipitation spread over 13 days, contributing to an average humidity of 89%. Be prepared for a chilly and damp atmosphere!

December Temperature in Redwood

In December in Redwood, the average temperature is -2°C (28°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -27°C (-17°F). Be prepared for a wide temperature range when traveling to Redwood this month.

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

The chart illustrates December temperature patterns in Redwood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Redwood, December typically has an average temperature of -2°C (28°F), with highs reaching up to 16°C (61°F) and lows dropping to around -27°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec222432445765716962523728
Data source: Temperature data for Redwood 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 Redwood

In Redwood in December, the precipitation amount is 98 mm (3.8 in) spread over 13 days.

December Precipitation Trends in Redwood

The chart displays monthly precipitation patterns in Redwood, 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 Redwood, December typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8684881301041041371067516111998
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Redwood

In Redwood in December, humidity is 89%. With an average temperature of -2°C (28°F), this humidity feels like a heavy blanket, making it difficult to stay warm while traveling outdoors.

December Average Humidity in Redwood

This chart illustrates the average monthly humidity levels in Redwood, 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 Redwood is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Redwood

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

Maximum UV Index Levels in Redwood for December

The chart shows the monthly maximum UV Index (UVI) for Redwood 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 Redwood typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899997532
Data source: Redwood 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 Redwood Compares to Other Months

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

This table compares monthly weather conditions in Redwood, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)86 mm (3.4 inches)93%low
February Weather-4°C (25°F)84 mm (3.3 inches)93%moderate
March Weather0°C (32°F)88 mm (3.5 inches)86%moderate
April Weather7°C (44°F)130 mm (5.1 inches)82%very high
May Weather14°C (57°F)104 mm (4.1 inches)75%very high
June Weather19°C (66°F)104 mm (4.1 inches)68%very high
July Weather22°C (72°F)137 mm (5.4 inches)69%very high
August Weather21°C (70°F)106 mm (4.2 inches)67%very high
September Weather17°C (62°F)75 mm (3.0 inches)72%high
October Weather11°C (52°F)160 mm (6.3 inches)83%moderate
November Weather3°C (37°F)119 mm (4.7 inches)88%moderate
December Weather-2°C (28°F)98 mm (3.8 inches)89%low

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