Cupertino, CA Weather & Growing Conditions
Overnight
57°F
Mostly Clear
Mostly clear, with a low around 57. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Clear | 2 mph S | 0% |
| Tuesday | 96°F | Haze then Sunny | 2 to 6 mph ENE | 0% |
| Tuesday Night | 57°F | Mostly Clear | 2 mph SW | 0% |
| Wednesday | 92°F | Sunny | 1 to 5 mph W | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 3 mph WSW | 0% |
| Thursday | 90°F | Sunny | 0 to 5 mph WSW | 0% |
| Thursday Night | 60°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Friday | 94°F | Sunny | 0 to 6 mph NW | 0% |
| Friday Night | 61°F | Clear | 0 to 5 mph NW | 0% |
| Saturday | 95°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 62°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 90°F | Sunny | 0 to 6 mph W | 0% |
| Sunday Night | 57°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Monday | 84°F | Sunny | 2 to 6 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cupertino, CA
Last spring frost
Mar 21
First fall frost
Dec 15
Growing season
275 days
Hardiness zone
9b
Explore more for Cupertino, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Skyline Ridge Preserve, Ca (5.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.