Penn Valley, CA Weather & Growing Conditions
Today
98°F
Sunny
Sunny, with a high near 98. Southwest wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 2 to 6 mph SW | 0% |
| Tonight | 71°F | Clear | 3 mph SE | 0% |
| Wednesday | 97°F | Sunny | 5 mph SSW | 0% |
| Wednesday Night | 69°F | Clear | 5 mph SE | 0% |
| Thursday | 97°F | Sunny | 1 to 5 mph SSE | 0% |
| Thursday Night | 70°F | Clear | 5 mph SE | 0% |
| Friday | 97°F | Sunny | 1 to 5 mph SW | 0% |
| Friday Night | 72°F | Clear | 5 mph SE | 0% |
| Saturday | 97°F | Sunny | 1 to 5 mph SSW | 0% |
| Saturday Night | 72°F | Clear | 5 mph ESE | 0% |
| Sunday | 96°F | Sunny | 2 to 6 mph S | 0% |
| Sunday Night | 70°F | Clear | 2 to 6 mph SE | 1% |
| Monday | 92°F | Sunny | 2 to 8 mph S | 1% |
| Monday Night | 66°F | Mostly Clear | 1 to 7 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Penn Valley, CA
Last spring frost
Apr 10
First fall frost
Nov 13
Growing season
215 days
Hardiness zone
9b
Explore more for Penn Valley, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Grass Valley #2, Ca (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.