Shelby, MT Weather & Growing Conditions
Today
47°F
Mostly Sunny
Mostly sunny. High near 47, with temperatures falling to around 42 in the afternoon. West southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 47°F | Mostly Sunny | 3 mph WSW | 0% |
| Tonight | 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% |
| Tuesday Night | 37°F | Partly Cloudy | 7 to 10 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.