Shelby, MT Weather & Growing Conditions
Overnight
27°F
Mostly Cloudy
Mostly cloudy, with a low around 27. West northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 27°F | Mostly Cloudy | 6 mph WNW | 0% |
| Wednesday | 47°F | Mostly Sunny | 1 to 6 mph WNW | 0% |
| Wednesday Night | 28°F | Partly Cloudy | 3 to 7 mph S | 0% |
| Thursday | 51°F | Mostly Sunny | 7 to 22 mph WSW | 1% |
| Thursday Night | 34°F | Partly Cloudy | 10 to 17 mph WSW | 1% |
| Friday | 52°F | Mostly Sunny | 8 to 16 mph WSW | 0% |
| Friday Night | 38°F | Mostly Cloudy | 12 to 20 mph WSW | 1% |
| Saturday | 57°F | Mostly Sunny | 6 to 12 mph SW | 1% |
| Saturday Night | 37°F | Mostly Cloudy | 6 mph SSW | 0% |
| Sunday | 59°F | Partly Sunny | 6 to 25 mph SW | 0% |
| Sunday Night | 36°F | Mostly Cloudy | 7 to 20 mph WSW | 0% |
| Monday | 51°F | Mostly Sunny | 7 mph SW | 0% |
| Monday Night | 36°F | Mostly Cloudy | 6 to 9 mph SW | 0% |
| Tuesday | 55°F | Mostly Sunny | 9 to 14 mph WSW | 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.