Normal yearly water year rainfall for Santa Rosa, CA is 33.77 inches. Season starts October 1 and ends September 30. At this reporting station we were behind -7.02 inches in 2021 - 2022 rainfall year and 8.27 inches over for the 2022 - 2023 rainfall year. The average rainfall for December 20, 2024 is 9.26 inches. We have had 21.96 inches of rain for the 2024 -2025 season. We have had 35.08 inches of rain for the 2023 - 2024 year. We had 41.64 inches of rain at this station for 2022 - 2023 season.

b Top 5 wettest years in Santa Rosa since 1888.

1. 2016-2017 60.40 inches

2. 1889-1890 56.07 inches

3. 1982-1983 55.66 inches

4. 1940-1941 52.15 inches

5. 1981-1982 47.70 inches

Kent's Weather data