Shelby, MT Weather & Growing Conditions
Tonight
28°F
Mostly Cloudy
Mostly cloudy, with a low around 28. West northwest wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Cloudy | 3 to 7 mph WNW | 0% |
| Wednesday | 47°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Wednesday Night | 28°F | Mostly Clear | 3 mph SSW | 0% |
| Thursday | 52°F | Mostly Sunny | 3 to 20 mph WSW | 0% |
| Thursday Night | 33°F | Partly Cloudy | 12 to 15 mph WSW | 0% |
| Friday | 51°F | Mostly Sunny | 10 to 21 mph WSW | 2% |
| Friday Night | 35°F | Partly Cloudy | 17 to 26 mph WSW | 2% |
| Saturday | 52°F | Mostly Sunny | 6 to 18 mph WSW | 1% |
| Saturday Night | 34°F | Mostly Cloudy | 7 mph SW | 0% |
| Sunday | 59°F | Partly Sunny | 5 to 14 mph SW | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 8 to 15 mph WSW | 2% |
| Monday | 52°F | Partly Sunny | 5 to 8 mph WSW | 2% |
| Monday Night | 35°F | Mostly Cloudy | 8 mph SSW | 1% |
| Tuesday | 56°F | Partly Sunny | 8 to 13 mph SW | 1% |
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 Nov 4, 2026.