Sunnyvale, CA Weather & Growing Conditions
Tonight
49°F
Chance Light Rain
A chance of rain before 4am. Partly cloudy, with a low around 49. North northwest wind around 3 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Chance Light Rain | 3 mph NNW | 25% |
| Wednesday | 67°F | Sunny | 2 to 10 mph NW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy then Patchy Fog | 1 to 8 mph WNW | 2% |
| Thursday | 71°F | Patchy Fog then Mostly Sunny | 2 to 6 mph NW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 5 mph N | 0% |
| Friday | 74°F | Sunny | 1 to 5 mph N | 0% |
| Friday Night | 50°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 51°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Sunday | 74°F | Mostly Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Monday | 72°F | Mostly Sunny | 0 to 6 mph NW | 2% |
| Monday Night | 51°F | Partly Cloudy | 1 to 6 mph WNW | 2% |
| Tuesday | 72°F | Sunny | 0 to 5 mph NNW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sunnyvale, CA
Last spring frost
Jan 6
First fall frost
Dec 23
Growing season
353 days
Hardiness zone
9b
Explore more for Sunnyvale, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Moffett Federal Airfield, Ca (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.