Shelby, MT Weather & Growing Conditions
This Afternoon
48°F
Mostly Sunny
Mostly sunny. High near 48, with temperatures falling to around 43 in the afternoon. East southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Mostly Sunny | 3 mph ESE | 0% |
| Tonight | 28°F | Patchy Fog | 1 to 7 mph N | 0% |
| Wednesday | 47°F | Patchy Fog then Mostly Sunny | 1 to 7 mph NW | 0% |
| Wednesday Night | 27°F | Patchy Fog | 2 mph WSW | 0% |
| Thursday | 53°F | Patchy Fog then Mostly Sunny | 2 to 15 mph WSW | 0% |
| Thursday Night | 32°F | Partly Cloudy | 8 to 13 mph WSW | 0% |
| Friday | 52°F | Mostly Sunny | 8 to 16 mph SW | 2% |
| Friday Night | 35°F | Partly Cloudy | 14 to 18 mph WSW | 2% |
| Saturday | 53°F | Mostly Sunny | 6 to 14 mph WSW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 6 mph SSW | 0% |
| Sunday | 59°F | Partly Sunny | 5 to 13 mph SW | 1% |
| Sunday Night | 35°F | Mostly Cloudy | 6 to 13 mph W | 3% |
| Monday | 53°F | Partly Sunny | 3 to 7 mph WSW | 3% |
| Monday Night | 34°F | Mostly Cloudy | 6 mph S | 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 (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.