Santa Rosa Valley, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Santa Rosa Valley, a community in Ventura County, California.

This Afternoon

82°F

Sunny

Sunny, with a high near 82. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

7-day forecast for Santa Rosa Valley

When	Temp	Forecast	Wind	Precip
This Afternoon	82°F	Sunny	5 to 10 mph WSW	1%
Tonight	60°F	Patchy Fog	0 to 5 mph SE	0%
Sunday	82°F	Patchy Fog then Partly Sunny	0 to 10 mph S	1%
Sunday Night	60°F	Mostly Cloudy	0 to 5 mph SSE	1%
Monday	79°F	Mostly Sunny	5 to 15 mph SW	1%
Monday Night	60°F	Partly Cloudy	5 to 10 mph NNE	0%
Tuesday	79°F	Sunny	5 to 10 mph SW	0%
Tuesday Night	60°F	Mostly Clear	0 to 10 mph NNW	0%
Wednesday	82°F	Sunny	0 to 10 mph WSW	0%
Wednesday Night	62°F	Mostly Clear	0 to 10 mph NNE	0%
Thursday	84°F	Sunny	0 to 10 mph SW	0%
Thursday Night	62°F	Mostly Clear	0 to 10 mph NW	0%
Friday	82°F	Sunny	0 to 10 mph WSW	1%
Friday Night	61°F	Partly Cloudy	0 to 10 mph NNW	1%

Forecast source: National Weather Service (api.weather.gov) for Santa Rosa Valley (34.246, -118.902). Updated through the day.

Growing snapshot for Santa Rosa Valley

Last spring frost

Dec 31

First fall frost

Dec 28

Growing season

365 days

Hardiness zone

10a

More local growing data for Santa Rosa Valley: nearby ZIP 91360 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Camarillo Casa Conejo Channel Islands Beach El Rio Fillmore Frazier Park Lake of the Woods Lake Sherwood Meiners Oaks Mira Monte Moorpark Oak Park Oak View Ojai Oxnard Piru Port Hueneme San Buenaventura (Ventura) Santa Paula Saticoy Simi Valley Somis Thousand Oaks Westlake Village

All California locations ›

Climate data from the nearest NOAA station, Camarillo Ap, Ca (12 mi from Santa Rosa Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.