Grass Valley, NV Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grass Valley, a community in Humboldt County, Nevada.
Today
95°F
Haze
Haze and patchy smoke. Sunny, with a high near 95. North wind 0 to 10 mph.
7-day forecast for Grass Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 95°F | Haze | 0 to 10 mph N | 0% |
| Tonight | 56°F | Patchy Smoke | 0 to 10 mph NW | 0% |
| Wednesday | 100°F | Areas Of Smoke | 0 to 5 mph SW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 103°F | Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 62°F | Clear | 0 to 10 mph SW | 0% |
| Friday | 103°F | Sunny | 0 to 10 mph SW | 0% |
| Friday Night | 62°F | Mostly Clear | 0 to 10 mph W | 0% |
| Saturday | 103°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 62°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Sunday | 100°F | Sunny | 0 to 15 mph W | 0% |
| Sunday Night | 60°F | Mostly Clear | 0 to 15 mph SW | 0% |
| Monday | 98°F | Sunny | 0 to 15 mph SW | 0% |
| Monday Night | 58°F | Mostly Clear | 5 to 15 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Grass Valley (40.797, -117.760). Updated through the day.
Growing snapshot for Grass Valley
Last spring frost
May 31
First fall frost
Sep 17
Growing season
108 days
Hardiness zone
6b
More local growing data for Grass Valley: nearby ZIP 89446 weather · frost dates · planting calendar · Nevada frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Winnemucca Muni Ap, Nv (7.7 mi from Grass Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.