Corvallis, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Corvallis, a community in Ravalli County, Montana.
This Afternoon
47°F
Partly Sunny
Partly sunny, with a high near 47. North wind around 2 mph.
7-day forecast for Corvallis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Partly Sunny | 2 mph N | 0% |
| Tonight | 27°F | Mostly Cloudy | 1 mph E | 0% |
| Wednesday | 48°F | Mostly Sunny | 2 mph NNW | 0% |
| Wednesday Night | 25°F | Mostly Clear | 1 to 5 mph SSW | 0% |
| Thursday | 47°F | Partly Sunny | 5 mph SW | 6% |
| Thursday Night | 26°F | Partly Cloudy | 6 mph SW | 6% |
| Friday | 49°F | Mostly Sunny | 5 to 8 mph SSW | 13% |
| Friday Night | 30°F | Mostly Cloudy | 6 to 13 mph SSW | 13% |
| Saturday | 54°F | Mostly Sunny | 6 mph S | 2% |
| Saturday Night | 33°F | Partly Cloudy | 3 to 12 mph S | 5% |
| Sunday | 59°F | Mostly Sunny | 5 to 9 mph SSW | 12% |
| Sunday Night | 33°F | Mostly Cloudy | 3 to 7 mph SW | 13% |
| Monday | 55°F | Partly Sunny | 3 mph SSW | 8% |
| Monday Night | 33°F | Mostly Cloudy | 3 to 8 mph SW | 12% |
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 3, 2026.