January Weather in Redwood, United States

Last updated: June 24, 2025

In January, the average temperature in Redwood, United States is a brisk 4°C (39°F), with extremes ranging from a chilling -13°C (9°F) to a mild 15°C (59°F). Expect 173 mm (6.8 in) of precipitation spread over 14 days, contributing to an average humidity of 84%. Prepare for a wet and cool month ahead!

January Temperature in Redwood

In January in Redwood, the average temperature is 4°C (39°F), with a maximum reaching 15°C (59°F) and a minimum dropping as low as -13°C (9°F). It’s essential to pack layers and prepare for varying weather conditions while traveling during this time.

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

The chart illustrates January 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, January typically has an average temperature of 4°C (39°F), with highs reaching up to 15°C (59°F) and lows dropping to around -13°C (9°F).

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

January Precipitation in Redwood

In Redwood in January, the precipitation amount is 173 mm (6.8 in) during a span of 14 days.

January Precipitation Trends in Redwood

The chart displays monthly precipitation patterns in Redwood, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Redwood, January typically receives around 173 mm (6.8 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Redwood

In Redwood in January, humidity is 84%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions uncomfortable and demanding more layers than you anticipate while traveling.

January Average Humidity in Redwood

This chart illustrates the average monthly humidity levels in Redwood, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Redwood is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Redwood

In Redwood in January, 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 Redwood, you can check the information here.

Maximum UV Index Levels in Redwood for January

The chart shows the monthly maximum UV Index (UVI) for Redwood in January, 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 January, the maximum UV index in Redwood typically reaches 3, which falls under the moderate exposure category.

Data source: Redwood January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	173 mm (6.8 inches)	84%	moderate
February Weather	4°C (39°F)	185 mm (7.3 inches)	85%	moderate
March Weather	6°C (43°F)	124 mm (4.9 inches)	86%	high
April Weather	9°C (49°F)	102 mm (4.0 inches)	83%	very high
May Weather	13°C (56°F)	51 mm (2.0 inches)	83%	extreme
June Weather	17°C (64°F)	20 mm (0.8 inches)	83%	extreme
July Weather	21°C (71°F)	1 mm (0.0 inches)	78%	very high
August Weather	21°C (71°F)	5 mm (0.2 inches)	67%	very high
September Weather	17°C (63°F)	37 mm (1.5 inches)	66%	very high
October Weather	11°C (53°F)	49 mm (1.9 inches)	77%	high
November Weather	7°C (44°F)	111 mm (4.4 inches)	87%	moderate
December Weather	3°C (38°F)	146 mm (5.7 inches)	87%	low