Grass Valley, CA Weather & Growing Conditions
Today
96°F
Sunny
Sunny, with a high near 96. South southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Sunny | 5 mph SSW | 0% |
| Tonight | 66°F | Clear | 2 mph ESE | 0% |
| Wednesday | 95°F | Sunny | 5 mph SSW | 0% |
| Wednesday Night | 66°F | Clear | 3 mph ESE | 0% |
| Thursday | 95°F | Sunny | 1 to 5 mph SSW | 0% |
| Thursday Night | 67°F | Clear | 3 mph ESE | 0% |
| Friday | 96°F | Sunny | 3 mph E | 0% |
| Friday Night | 68°F | Clear | 3 mph ESE | 0% |
| Saturday | 97°F | Sunny | 5 mph E | 0% |
| Saturday Night | 68°F | Clear | 3 mph SE | 0% |
| Sunday | 94°F | Sunny | 2 to 6 mph SSE | 0% |
| Sunday Night | 66°F | Clear | 5 mph SE | 0% |
| Monday | 90°F | Sunny | 2 to 6 mph S | 0% |
| Monday Night | 63°F | Mostly Clear | 1 to 5 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grass Valley, CA
Last spring frost
Apr 14
First fall frost
Nov 20
Growing season
218 days
Hardiness zone
9a
Explore more for Grass Valley, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Nevada City, Ca (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.