Santa Rosa Weather in January

What's the weather like in Santa Rosa (California) in January 2024?

The climate in Santa Rosa during January can be summarized as cool and wet.

January is in the winter in Santa Rosa and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 3°C (38°F) is normal.

Santa Rosa weather averages (imperial / metric)
Daytime temperature 13.7°C 56.6°F
Nightly temperature 3.2°C 37.7°F
Average temperature 8.4°C 47.1°F
Daily sunshine 6.2 hrs
Avg rainfall 182 mm 7.2 ins
Rainy days 11 days
Sea temperature 12.1°C 53.8°F
Humidity 81%
Windspeed 11.5kph 7 mph

On average January is the wettest month of the year in Santa Rosa with around 182mm 7.2 inches of rain making it a wet time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.2 hours of sunshine per day.

January temperatures in Santa Rosa

Santa Rosa average temperature in January

January rainfall

Santa Rosa average rain in January

January hourly sunshine

Santa Rosa average rain in January

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 Santa Rosa in January 2024.