Plains, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plains, a town in Sanders County, Montana.
Today
49°F
Partly Sunny
Partly sunny. High near 49, with temperatures falling to around 44 in the afternoon. West northwest wind around 1 mph.
7-day forecast for Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 49°F | Partly Sunny | 1 mph WNW | 0% |
| Tonight | 26°F | Mostly Cloudy then Patchy Fog | 0 mph | 1% |
| Wednesday | 54°F | Areas Of Fog then Mostly Sunny | 1 mph ENE | 0% |
| Wednesday Night | 27°F | Partly Cloudy then Patchy Fog | 1 mph SSW | 3% |
| Thursday | 51°F | Patchy Fog then Partly Sunny | 3 mph SW | 11% |
| Thursday Night | 30°F | Mostly Cloudy | 3 mph SW | 4% |
| Friday | 54°F | Partly Sunny then Slight Chance Light Rain | 1 to 5 mph SW | 15% |
| Friday Night | 33°F | Slight Chance Light Rain then Mostly Cloudy | 1 to 6 mph SW | 15% |
| Saturday | 56°F | Partly Sunny | 2 mph SSW | 3% |
| Saturday Night | 34°F | Mostly Cloudy | 1 mph S | 14% |
| Sunday | 61°F | Slight Chance Light Rain | 3 mph SW | 20% |
| Sunday Night | 34°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 3 mph WSW | 16% |
| Monday | 55°F | Mostly Cloudy then Slight Chance Light Rain | 1 mph SSE | 15% |
| Monday Night | 35°F | Slight Chance Light Rain | 1 mph SSW | 18% |
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 Nov 3, 2026.