Corvallis, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Corvallis, a community in Ravalli County, Montana.
Tonight
27°F
Mostly Cloudy
Mostly cloudy, with a low around 27. Northeast wind around 1 mph.
7-day forecast for Corvallis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 27°F | Mostly Cloudy | 1 mph NE | 0% |
| Wednesday | 49°F | Mostly Sunny | 2 mph N | 0% |
| Wednesday Night | 26°F | Mostly Clear | 5 mph SSE | 0% |
| Thursday | 45°F | Partly Sunny | 5 mph SW | 9% |
| Thursday Night | 26°F | Partly Cloudy | 6 mph SSW | 2% |
| Friday | 50°F | Mostly Sunny | 5 to 8 mph SSW | 3% |
| Friday Night | 32°F | Mostly Cloudy | 6 to 10 mph SSW | 3% |
| Saturday | 57°F | Mostly Sunny | 6 mph S | 1% |
| Saturday Night | 35°F | Partly Cloudy | 5 to 14 mph S | 11% |
| Sunday | 58°F | Partly Sunny | 6 to 12 mph WSW | 11% |
| Sunday Night | 32°F | Mostly Cloudy | 3 to 7 mph SW | 8% |
| Monday | 54°F | Partly Sunny | 3 mph SSW | 8% |
| Monday Night | 34°F | Mostly Cloudy | 3 to 8 mph SW | 9% |
| Tuesday | 55°F | Mostly Sunny | 3 to 7 mph SSW | 11% |
Forecast source: National Weather Service (api.weather.gov) for Corvallis (46.314, -114.112). Updated through the day.
Growing snapshot for Corvallis
Last spring frost
May 23
First fall frost
Sep 21
Growing season
118 days
Hardiness zone
5b
More local growing data for Corvallis: nearby ZIP 59841 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Western Ag Rsch Ctr, Mt (6.6 mi from Corvallis). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.