Sunnyvale, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sunnyvale, a city in Santa Clara County, California.
This Afternoon
66°F
Chance Light Rain
A chance of rain. Partly sunny. High near 66, with temperatures falling to around 62 in the afternoon. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sunnyvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Chance Light Rain | 5 mph S | 40% |
| Tonight | 49°F | Chance Light Rain then Patchy Fog | 2 to 6 mph SE | 30% |
| Wednesday | 67°F | Sunny | 2 to 9 mph NNW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy then Patchy Fog | 2 to 8 mph NW | 0% |
| Thursday | 70°F | Patchy Fog then Mostly Sunny | 2 to 6 mph N | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Friday | 72°F | Sunny | 1 to 6 mph N | 0% |
| Friday Night | 50°F | Clear | 0 to 6 mph E | 0% |
| Saturday | 75°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 50°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Sunday | 73°F | Mostly Sunny | 1 to 6 mph NNW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 1 to 6 mph NW | 0% |
| Monday | 71°F | Partly Sunny | 1 to 7 mph NW | 1% |
| Monday Night | 50°F | Mostly Cloudy | 1 to 7 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sunnyvale (37.386, -122.026). Updated through the day.
Growing snapshot for Sunnyvale
Last spring frost
Jan 6
First fall frost
Dec 23
Growing season
353 days
Hardiness zone
10a
More local growing data for Sunnyvale: nearby ZIP 94085 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Moffett Federal Airfield, Ca (2 mi from Sunnyvale). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.