Portola, CA Weather & Growing Conditions
Tonight
41°F
Clear
Clear, with a low around 41. North wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 41°F | Clear | 0 mph | 0% |
| Saturday | 76°F | Sunny | 0 to 5 mph E | 0% |
| Saturday Night | 43°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Sunday | 78°F | Partly Sunny | 0 to 5 mph E | 0% |
| Sunday Night | 47°F | Mostly Cloudy | 0 to 5 mph W | 0% |
| Monday | 79°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Monday Night | 45°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Tuesday | 81°F | Sunny | 0 to 5 mph NE | 1% |
| Tuesday Night | 47°F | Mostly Clear | 0 to 5 mph S | 0% |
| Wednesday | 81°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 49°F | Mostly Clear | 0 to 5 mph S | 0% |
| Thursday | 81°F | Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Friday | 76°F | Mostly Sunny | 0 to 10 mph S | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portola, CA
Last spring frost
Jun 11
First fall frost
Sep 10
Growing season
91 days
Hardiness zone
6b
Explore more for Portola, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Portola, Ca (1.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.