Penryn, CA Weather & Growing Conditions
Overnight
57°F
Clear
Clear. Low around 57, with temperatures rising to around 59 overnight. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Clear | 3 mph E | 0% |
| Saturday | 88°F | Sunny | 5 mph SSW | 0% |
| Saturday Night | 61°F | Partly Cloudy | 5 mph SE | 0% |
| Sunday | 85°F | Mostly Cloudy | 5 mph S | 0% |
| Sunday Night | 60°F | Mostly Cloudy | 3 mph S | 0% |
| Monday | 86°F | Sunny | 5 mph SSW | 0% |
| Monday Night | 57°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Sunny | 5 mph S | 0% |
| Tuesday Night | 61°F | Clear | 5 mph SE | 0% |
| Wednesday | 91°F | Sunny | 5 mph ESE | 0% |
| Wednesday Night | 63°F | Mostly Clear | 5 mph ESE | 0% |
| Thursday | 94°F | Sunny | 5 mph SSW | 0% |
| Thursday Night | 64°F | Mostly Clear | 6 mph SE | 0% |
| Friday | 89°F | Sunny | 6 mph SSE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Penryn, CA
Last spring frost
Feb 25
First fall frost
Dec 5
Growing season
286 days
Hardiness zone
9b
Explore more for Penryn, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Auburn, Ca (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.