Corvallis, MT Weather & Growing Conditions
Today
67°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 67. Northwest wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Patchy Smoke | 1 to 6 mph NW | 0% |
| Tonight | 48°F | Patchy Smoke | 2 to 6 mph ENE | 0% |
| Wednesday | 72°F | Patchy Smoke | 3 mph SW | 0% |
| Wednesday Night | 52°F | Patchy Smoke then Mostly Clear | 2 to 6 mph SW | 0% |
| Thursday | 79°F | Sunny | 5 mph SW | 0% |
| Thursday Night | 58°F | Mostly Clear | 2 to 6 mph SW | 0% |
| Friday | 82°F | Sunny | 3 to 8 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 12 mph WSW | 0% |
| Saturday | 79°F | Sunny | 3 to 8 mph SW | 0% |
| Saturday Night | 57°F | Mostly Clear | 2 to 8 mph WSW | 0% |
| Sunday | 76°F | Sunny | 2 to 6 mph WSW | 0% |
| Sunday Night | 55°F | Mostly Clear | 1 to 8 mph W | 0% |
| Monday | 75°F | Sunny | 1 to 5 mph W | 0% |
| Monday Night | 54°F | Mostly Clear | 1 to 6 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Corvallis, MT
Last spring frost
May 23
First fall frost
Sep 21
Growing season
118 days
Hardiness zone
5b
Explore more for Corvallis, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Western Ag Rsch Ctr, Mt (6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.