Harman US

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

WhenTempForecastWindPrecip
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.