Plains, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plains, a town in Sanders County, Montana.
This Afternoon
51°F
Sunny
Sunny. High near 51, with temperatures falling to around 43 in the afternoon. South southeast wind around 2 mph.
7-day forecast for Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Sunny | 2 mph SSE | 0% |
| Tonight | 26°F | Partly Cloudy then Patchy Fog | 1 mph S | 2% |
| Thursday | 47°F | Mostly Cloudy | 3 mph S | 13% |
| Thursday Night | 29°F | Partly Cloudy then Patchy Fog | 3 mph SW | 1% |
| Friday | 52°F | Patchy Fog then Partly Sunny | 3 mph SW | 0% |
| Friday Night | 34°F | Mostly Cloudy | 3 mph SW | 3% |
| Saturday | 60°F | Patchy Fog then Partly Sunny | 1 mph SSE | 1% |
| Saturday Night | 34°F | Partly Cloudy then Patchy Fog | 2 mph SSE | 7% |
| Sunday | 59°F | Partly Sunny | 2 to 8 mph SW | 13% |
| Sunday Night | 34°F | Mostly Cloudy then Areas Of Fog | 0 to 5 mph WSW | 13% |
| Monday | 53°F | Areas Of Fog then Mostly Cloudy | 1 mph ENE | 9% |
| Monday Night | 33°F | Patchy Fog | 1 mph SW | 8% |
| Tuesday | 57°F | Patchy Fog then Slight Chance Light Rain | 2 mph SW | 16% |
| Tuesday Night | 36°F | Slight Chance Light Rain | 1 mph SW | 17% |
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 4, 2026.