Grass Valley, OR Weather & Growing Conditions
Today
84°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 84. East wind 2 to 14 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Areas Of Smoke | 2 to 14 mph E | 0% |
| Tonight | 57°F | Areas Of Smoke | 2 to 13 mph SE | 0% |
| Wednesday | 91°F | Areas Of Smoke | 3 to 9 mph NE | 0% |
| Wednesday Night | 62°F | Patchy Smoke then Mostly Clear | 3 to 9 mph W | 0% |
| Thursday | 96°F | Sunny | 3 to 12 mph W | 0% |
| Thursday Night | 64°F | Mostly Clear | 8 to 13 mph W | 0% |
| Friday | 92°F | Sunny | 8 to 17 mph W | 0% |
| Friday Night | 61°F | Mostly Clear | 7 to 17 mph W | 0% |
| Saturday | 88°F | Sunny | 7 to 20 mph W | 0% |
| Saturday Night | 58°F | Mostly Clear | 8 to 20 mph W | 0% |
| Sunday | 83°F | Sunny | 7 to 17 mph W | 0% |
| Sunday Night | 55°F | Mostly Clear | 7 to 17 mph W | 0% |
| Monday | 82°F | Sunny | 6 to 15 mph W | 0% |
| Monday Night | 54°F | Mostly Clear | 7 to 15 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grass Valley, OR
Last spring frost
May 15
First fall frost
Oct 11
Growing season
147 days
Hardiness zone
7a
Explore more for Grass Valley, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Kent, Or (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.