Plains, MT Weather & Growing Conditions
Today
77°F
Patchy Smoke then Sunny
Patchy smoke before noon. Sunny, with a high near 77. East northeast wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Patchy Smoke then Sunny | 2 to 6 mph ENE | 0% |
| Tonight | 53°F | Mostly Clear | 5 mph WNW | 0% |
| Wednesday | 82°F | Sunny then Patchy Smoke | 3 to 7 mph WSW | 0% |
| Wednesday Night | 56°F | Patchy Smoke then Mostly Clear | 5 to 8 mph W | 0% |
| Thursday | 89°F | Sunny | 3 to 7 mph SW | 0% |
| Thursday Night | 60°F | Mostly Clear | 5 to 12 mph WSW | 0% |
| Friday | 89°F | Sunny | 3 to 15 mph WSW | 0% |
| Friday Night | 60°F | Clear | 7 to 18 mph WSW | 0% |
| Saturday | 86°F | Sunny | 6 to 16 mph WSW | 0% |
| Saturday Night | 59°F | Mostly Clear | 5 to 15 mph WSW | 0% |
| Sunday | 83°F | Sunny | 3 to 9 mph WSW | 0% |
| Sunday Night | 58°F | Mostly Clear | 5 to 12 mph W | 0% |
| Monday | 83°F | Sunny | 2 to 6 mph NW | 0% |
| Monday Night | 57°F | Mostly Clear | 5 to 9 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plains, MT
Growing season
101 days
Hardiness zone
6a
Explore more for Plains, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Saint Regis 1 Ne, Mt (20.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.