Guerneville Weather in March

The climate in Guerneville during March can be summarized as mild and wet.

March is in the spring in Guerneville and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 5°C (42°F) is normal.

On average March is the 5th wettest month of the year in Guerneville with around 144mm 5.7 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 9 hours of sunshine per day.

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 Guerneville in March 2025.