Historical Weather in Santa Rosa, CA
See 55+ years of weather history for any date in Santa Rosa going back to 1970.
Part of California weather history · California temperature records
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Monthly Climate Averages
Historical temperature and precipitation averages for Santa Rosa, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Santa Rosa, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Santa Rosa, CA Monthly Precipitation
Average rainfall per month, in inches.
Santa Rosa, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Growing Season & Frost in Santa Rosa, CA
Based on the dates the average overnight low reaches freezing (32°F / 0°C), from 50+ years of NOAA station data.
Hours of Daylight in Santa Rosa, CA
Day length across the year at 38.4°N latitude. Computed from solar geometry.
Best Time to Visit Santa Rosa, CA
Most pleasant months in Santa Rosa, CA: July.
Santa Rosa Temperature Records
- Record High: The hottest temperature ever recorded in Santa Rosa, CA is 117°F, set on September 6, 2022.
- Record Low: The coldest temperature ever recorded in Santa Rosa, CA is 14°F, set on December 22, 1990.
- Data Coverage: Based on 57 years of data from NOAA weather station: SANTA ROSA.
All-Time Record High
All-Time Record Low
Monthly Temperature Records in Santa Rosa
| Month | Record High | Record Low |
|---|---|---|
| January | 84°F(2009) | 19°F(2007) |
| February | 88°F(2016) | 17°F(1989) |
| March | 91°F(2022) | 25°F(2009) |
| April | 99°F(2004) | 27°F(1976) |
| May | 105°F(1976) | 30°F(2010) |
| June | 113°F(2000) | 33°F(1976) |
| July | 116°F(1972) | 38°F(2009) |
| August | 109°F(2020) | 30°F(2011) |
| September | 117°F(2022) | 28°F(2012) |
| October | 108°F(1980) | 22°F(1971) |
| November | 91°F(2008) | 20°F(1986) |
| December | 81°F(2011) | 14°F(1990) |