December Weather in Redwood, United States

Last updated: June 24, 2025

The average temperature in Redwood, United States during December hovers around 13°C (56°F). However, be prepared for fluctuations, as the minimum can drop to -4°C (25°F) while the maximum can soar to 29°C (84°F). Over the course of the month, expect about 67 mm (2.6 in) of precipitation spread across 7 days, contributing to an average humidity of 86%.

December Temperature in Redwood

In December in Redwood, the average temperature is 13°C (56°F). Maximum temperatures can reach 29°C (84°F), while minimums can drop as low as -4°C (25°F). This range of temperatures makes Redwood a destination for both warm-weather enthusiasts and those who appreciate the chill, so be sure to pack for varying conditions.

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 13°C (56°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (25°F).

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

December Precipitation in Redwood

In Redwood in December, the total precipitation amount is 67 mm (2.6 in) over a span of 7 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 67 mm (2.6 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 Redwood

In Redwood in December, humidity is 86%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or air-conditioned spaces frequently.

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 86%, 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 Redwood

In Redwood in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the 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 5, which falls under the moderate exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	46 mm (1.8 inches)	79%	moderate
February Weather	12°C (54°F)	57 mm (2.2 inches)	79%	very high
March Weather	18°C (65°F)	61 mm (2.4 inches)	74%	very high
April Weather	21°C (69°F)	92 mm (3.6 inches)	76%	extreme
May Weather	25°C (77°F)	136 mm (5.4 inches)	81%	extreme
June Weather	28°C (82°F)	95 mm (3.7 inches)	76%	extreme
July Weather	29°C (85°F)	78 mm (3.1 inches)	66%	extreme
August Weather	30°C (86°F)	96 mm (3.8 inches)	58%	extreme
September Weather	27°C (80°F)	109 mm (4.3 inches)	65%	extreme
October Weather	22°C (71°F)	85 mm (3.4 inches)	74%	very high
November Weather	16°C (61°F)	51 mm (2.0 inches)	81%	high
December Weather	13°C (56°F)	67 mm (2.6 inches)	86%	moderate