Shelby, MT Weather & Growing Conditions
Tonight
49°F
Mostly Cloudy
Mostly cloudy, with a low around 49. North wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Cloudy | 7 mph N | 1% |
| Saturday | 68°F | Mostly Sunny | 3 to 9 mph ENE | 1% |
| Saturday Night | 46°F | Partly Cloudy | 3 to 9 mph SSE | 0% |
| Sunday | 72°F | Sunny | 3 to 9 mph SSE | 0% |
| Sunday Night | 47°F | Mostly Clear | 3 to 12 mph SE | 0% |
| Monday | 76°F | Mostly Sunny | 2 to 8 mph SSE | 0% |
| Monday Night | 49°F | Mostly Clear | 8 mph WSW | 0% |
| Tuesday | 73°F | Mostly Sunny | 7 mph WNW | 0% |
| Tuesday Night | 49°F | Mostly Clear | 3 to 7 mph SSW | 1% |
| Wednesday | 73°F | Sunny | 3 to 10 mph WSW | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 3 to 8 mph W | 3% |
| Thursday | 73°F | Mostly Sunny | 2 to 7 mph SW | 2% |
| Thursday Night | 49°F | Partly Cloudy | 3 to 8 mph SE | 1% |
| Friday | 73°F | Mostly Sunny | 3 to 8 mph SSW | 2% |
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 (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.