Plains, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plains, a town in Sanders County, Montana.
Overnight
42°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 42. Wind around 0 mph.
7-day forecast for Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Patchy Smoke | 0 mph | 0% |
| Tuesday | 85°F | Patchy Smoke then Sunny | 2 mph WNW | 0% |
| Tuesday Night | 47°F | Mostly Clear | 1 mph SSE | 0% |
| Wednesday | 91°F | Sunny then Patchy Smoke | 2 mph SW | 0% |
| Wednesday Night | 50°F | Mostly Clear | 2 mph W | 0% |
| Thursday | 99°F | Sunny | 3 mph SW | 0% |
| Thursday Night | 54°F | Clear | 1 to 6 mph WSW | 0% |
| Friday | 99°F | Sunny | 1 to 7 mph WSW | 0% |
| Friday Night | 53°F | Clear | 2 to 9 mph WSW | 0% |
| Saturday | 95°F | Sunny | 1 to 8 mph WSW | 0% |
| Saturday Night | 52°F | Mostly Clear | 1 to 7 mph WSW | 0% |
| Sunday | 92°F | Sunny | 3 mph WSW | 0% |
| Sunday Night | 51°F | Mostly Clear | 1 to 5 mph W | 0% |
| Monday | 92°F | Sunny | 2 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Plains (47.460, -114.884). Updated through the day.
Growing snapshot for Plains
Growing season
101 days
Hardiness zone
6a
More local growing data for Plains: nearby ZIP 59859 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Belknap
Bull Lake
Camas
Dixon
Heron
Hot Springs
Lonepine
Noxon
Old Agency
Paradise
Thompson Falls
Trout Creek
Climate data from the nearest NOAA station, Saint Regis 1 Ne, Mt (20.3 mi from Plains). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.