Plains, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plains, a town in Sanders County, Montana.
This Afternoon
81°F
Mostly Sunny
Mostly sunny, with a high near 81. West northwest wind around 6 mph.
7-day forecast for Plains
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Mostly Sunny | 6 mph WNW | 3% |
| Tonight | 47°F | Mostly Cloudy | 2 mph S | 6% |
| Saturday | 81°F | Sunny | 2 mph NW | 3% |
| Saturday Night | 46°F | Partly Cloudy | 1 mph SSE | 1% |
| Sunday | 83°F | Patchy Fog then Sunny | 1 mph ENE | 0% |
| Sunday Night | 48°F | Clear | 1 mph WNW | 0% |
| Monday | 86°F | Sunny | 2 mph W | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph WSW | 0% |
| Tuesday | 83°F | Sunny | 2 mph WSW | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 2 mph WSW | 1% |
| Wednesday | 81°F | Sunny | 0 to 3 mph SW | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph NW | 2% |
| Thursday | 83°F | Mostly Sunny | 2 mph ENE | 2% |
| Thursday Night | 49°F | Partly Cloudy | 2 mph N | 2% |
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 Sep 19, 2026.