Sunnyvale, CA Weather & Growing Conditions
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 74 in the afternoon. North northwest wind 5 to 14 mph, with gusts as high as 22 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 5 to 14 mph NNW | 0% |
| Tonight | 56°F | Mostly Cloudy | 3 to 12 mph N | 0% |
| Sunday | 73°F | Mostly Cloudy | 2 to 10 mph NNW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 2 to 8 mph WNW | 0% |
| Monday | 75°F | Mostly Sunny | 2 to 12 mph WSW | 0% |
| Monday Night | 56°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Tuesday | 76°F | Patchy Fog then Sunny | 2 to 10 mph WSW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 0 to 10 mph WSW | 0% |
| Wednesday | 83°F | Sunny | 0 to 9 mph WSW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 0 to 9 mph WSW | 0% |
| Thursday | 87°F | Sunny | 1 to 12 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 12 mph W | 0% |
| Friday | 81°F | Mostly Sunny | 2 to 10 mph W | 0% |
| Friday Night | 58°F | Partly Cloudy | 3 to 10 mph WSW | 0% |
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
10a
Explore more for Sunnyvale, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Moffett Federal Airfield, Ca (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.