Shelby, MT Weather & Growing Conditions
Overnight
50°F
Mostly Cloudy
Mostly cloudy, with a low around 50. North northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Cloudy | 5 mph NNE | 0% |
| Saturday | 69°F | Mostly Sunny | 3 to 8 mph E | 0% |
| Saturday Night | 44°F | Partly Cloudy | 3 to 8 mph SE | 0% |
| Sunday | 72°F | Sunny | 5 to 9 mph SE | 0% |
| Sunday Night | 46°F | Mostly Clear | 5 to 10 mph SE | 0% |
| Monday | 76°F | Sunny | 5 to 8 mph SSE | 0% |
| Monday Night | 47°F | Mostly Clear | 2 to 8 mph SW | 0% |
| Tuesday | 77°F | Sunny | 3 mph W | 0% |
| Tuesday Night | 47°F | Mostly Clear | 5 mph W | 0% |
| Wednesday | 76°F | Mostly Sunny | 2 to 6 mph WSW | 1% |
| Wednesday Night | 48°F | Mostly Clear | 6 mph SSW | 3% |
| Thursday | 75°F | Mostly Sunny | 2 to 6 mph SW | 2% |
| Thursday Night | 47°F | Slight Chance Light Rain then Partly Cloudy | 3 to 8 mph NE | 16% |
| Friday | 70°F | Mostly Sunny | 5 to 9 mph N | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Shelby, MT
Last spring frost
May 23
First fall frost
Sep 16
Growing season
115 days
Hardiness zone
4a
Explore more for Shelby, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Shelby, Mt (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.