Penryn, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penryn, a community in Placer County, California.
Overnight
70°F
Clear
Clear, with a low around 70. Southeast wind around 5 mph.
7-day forecast for Penryn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Clear | 5 mph SE | 0% |
| Tuesday | 104°F | Sunny | 6 mph S | 0% |
| Tuesday Night | 68°F | Clear | 6 mph SSE | 0% |
| Wednesday | 102°F | Sunny | 5 mph S | 0% |
| Wednesday Night | 66°F | Clear | 5 mph S | 0% |
| Thursday | 102°F | Sunny | 5 mph S | 0% |
| Thursday Night | 68°F | Clear | 6 mph S | 0% |
| Friday | 102°F | Sunny | 5 mph SSW | 0% |
| Friday Night | 69°F | Clear | 6 mph S | 0% |
| Saturday | 103°F | Sunny | 5 mph S | 0% |
| Saturday Night | 70°F | Clear | 7 mph S | 0% |
| Sunday | 101°F | Sunny | 3 to 7 mph S | 0% |
| Sunday Night | 66°F | Mostly Clear | 7 mph S | 0% |
| Monday | 96°F | Sunny | 5 to 8 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Penryn (38.848, -121.170). Updated through the day.
Growing snapshot for Penryn
Last spring frost
Feb 25
First fall frost
Dec 5
Growing season
286 days
Hardiness zone
9b
More local growing data for Penryn: nearby ZIP 95663 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Auburn, Ca (6.3 mi from Penryn). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.