Portola, CA Weather & Growing Conditions
Overnight
54°F
Haze
Haze and patchy smoke. Clear, with a low around 54. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Haze | 0 mph | 0% |
| Tuesday | 93°F | Haze | 0 to 10 mph SE | 0% |
| Tuesday Night | 54°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Wednesday | 91°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 53°F | Clear | 0 to 10 mph SW | 0% |
| Thursday | 92°F | Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 56°F | Clear | 0 to 10 mph SW | 0% |
| Friday | 92°F | Sunny | 0 to 10 mph SW | 0% |
| Friday Night | 57°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Saturday | 91°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 56°F | Clear | 0 to 10 mph SW | 0% |
| Sunday | 89°F | Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 53°F | Clear | 0 to 10 mph SW | 0% |
| Monday | 85°F | Sunny | 0 to 15 mph SW | 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 Aug 4, 2026.