Grass Valley, NV Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grass Valley, a community in Humboldt County, Nevada.
This Afternoon
71°F
Sunny
Sunny, with a high near 71. Northwest wind around 10 mph.
7-day forecast for Grass Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 10 mph NW | 1% |
| Tonight | 41°F | Mostly Clear | 0 to 10 mph N | 1% |
| Saturday | 75°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 43°F | Mostly Clear | 5 mph NE | 0% |
| Sunday | 81°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Sunday Night | 48°F | Partly Cloudy | 5 mph NE | 0% |
| Monday | 82°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Monday Night | 49°F | Partly Cloudy | 5 mph N | 0% |
| Tuesday | 82°F | Mostly Sunny | 0 to 5 mph N | 1% |
| Tuesday Night | 48°F | Mostly Clear | 5 mph NE | 1% |
| Wednesday | 85°F | Sunny | 0 to 5 mph S | 1% |
| Wednesday Night | 48°F | Mostly Clear | 5 mph SE | 1% |
| Thursday | 86°F | Sunny | 5 mph S | 0% |
| Thursday Night | 50°F | Partly Cloudy | 5 mph S | 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 Sep 19, 2026.