Santa Rosa (CA) Weather and Climate: A Comprehensive Guide
The climate in Santa Rosa is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to mild in the cooler months.
It receives a moderate amount of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average maximum day and minimum night temperature
In Santa Rosa, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 28°C in September to a moderate 14°C in January.
Nighttime temperatures can drop, with average lows reaching 4°C in January. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
On average, Santa Rosa receives a reasonable amount of rainfall, with an annual precipitation of 713 mm. The seasons in Santa Rosa, bring significant changes in precipitation. The wettest month, December, receives high rainfall, with an average of 145 mm of precipitation. This rainfall is distributed across 13 rainy days. In contrast, the driest month, August, experiences much less rainfall, totaling 0.3 mm over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Santa Rosa Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Santa Rosa, summer days are longer and more sunny, with daily sunshine hours peaking at 10.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.3 hours per average day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
broken clouds and rain overcast and slight rain overcast and rainForecast for Santa Rosa (CA)
4 m/s
3 m/s
3 m/s
The best time of year to visit Santa Rosa in the United States of America
During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Yes, the months of June, July, August and September are very dry.
September has an average maximum temperature of 28°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 14°C.
December tops the wettest month list with 145 mm of rainfall.
August is the driest month with 0 mm of precipitation.
May is the sunniest month with an average of 310 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
