Penryn, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penryn, a community in Placer County, California.
This Afternoon
68°F
Mostly Sunny
Mostly sunny. High near 68, with temperatures falling to around 63 in the afternoon. Northwest wind around 3 mph.
7-day forecast for Penryn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Mostly Sunny | 3 mph NW | 0% |
| Tonight | 45°F | Partly Cloudy | 3 mph NE | 1% |
| Thursday | 70°F | Sunny | 5 mph W | 0% |
| Thursday Night | 46°F | Mostly Clear | 3 mph NE | 0% |
| Friday | 70°F | Sunny | 3 mph N | 0% |
| Friday Night | 48°F | Clear | 3 mph NE | 0% |
| Saturday | 74°F | Sunny | 3 mph W | 0% |
| Saturday Night | 49°F | Mostly Clear | 3 mph ENE | 0% |
| Sunday | 74°F | Sunny | 3 mph NE | 0% |
| Sunday Night | 49°F | Partly Cloudy | 3 mph ENE | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph WSW | 0% |
| Monday Night | 50°F | Partly Cloudy | 2 mph ENE | 1% |
| Tuesday | 73°F | Sunny | 3 mph WSW | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 5 mph S | 6% |
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 Nov 5, 2026.