Sunnyvale, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sunnyvale, a city in Santa Clara County, California.
Today
88°F
Sunny
Sunny. High near 88, with temperatures falling to around 85 in the afternoon. North northwest wind 2 to 9 mph.
7-day forecast for Sunnyvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 2 to 9 mph NNW | 0% |
| Tonight | 59°F | Mostly Clear | 2 to 8 mph WNW | 0% |
| Wednesday | 85°F | Sunny | 2 to 8 mph WNW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 8 mph WNW | 0% |
| Thursday | 84°F | Sunny | 1 to 9 mph WNW | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 9 mph NW | 0% |
| Friday | 89°F | Sunny | 2 to 9 mph NW | 0% |
| Friday Night | 62°F | Mostly Clear | 2 to 9 mph WNW | 0% |
| Saturday | 88°F | Sunny | 1 to 9 mph WNW | 0% |
| Saturday Night | 63°F | Mostly Clear | 2 to 9 mph W | 0% |
| Sunday | 84°F | Sunny | 2 to 10 mph W | 0% |
| Sunday Night | 60°F | Mostly Clear | 5 to 10 mph W | 0% |
| Monday | 81°F | Sunny | 3 to 10 mph WSW | 0% |
| Monday Night | 58°F | Mostly Clear | 3 to 10 mph WSW | 0% |
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 Aug 4, 2026.