Redwood Valley Weather in December

What's the weather like in Redwood Valley (California) in December 2025?

The climate in Redwood Valley during December can be summarized as cool and wet.

December is in the winter in Redwood Valley and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 12°C (53°F), whilst at night 2°C (35°F) is normal.

Redwood Valley weather averages (imperial / metric)
Daytime temperature 11.9°C 53.4°F
Nightly temperature 1.5°C 34.7°F
Average temperature 6.7°C 44.1°F
Daily sunshine 5.4 hrs
Avg rainfall 192 mm 7.6 ins
Rainy days 12 days
Sea temperature 12.2°C 54°F
Humidity 82%
Windspeed 11.5kph 7 mph

On average December is the 2nd wettest month of the year in Redwood Valley with around 192mm 7.6 inches of rain making it a wet time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.4 hours of sunshine per day.

December temperatures in Redwood Valley

Redwood Valley average temperature in December

December rainfall

Redwood Valley average rain in December

December hourly sunshine

Redwood Valley average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Redwood Valley in December 2025.