Harman US

Shelby, MT Weather & Growing Conditions

Overnight
50°F
Mostly Cloudy
Mostly cloudy, with a low around 50. North northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 50°F Mostly Cloudy 5 mph NNE 0%
Saturday 69°F Mostly Sunny 3 to 8 mph E 0%
Saturday Night 44°F Partly Cloudy 3 to 8 mph SE 0%
Sunday 72°F Sunny 5 to 9 mph SE 0%
Sunday Night 46°F Mostly Clear 5 to 10 mph SE 0%
Monday 76°F Sunny 5 to 8 mph SSE 0%
Monday Night 47°F Mostly Clear 2 to 8 mph SW 0%
Tuesday 77°F Sunny 3 mph W 0%
Tuesday Night 47°F Mostly Clear 5 mph W 0%
Wednesday 76°F Mostly Sunny 2 to 6 mph WSW 1%
Wednesday Night 48°F Mostly Clear 6 mph SSW 3%
Thursday 75°F Mostly Sunny 2 to 6 mph SW 2%
Thursday Night 47°F Slight Chance Light Rain then Partly Cloudy 3 to 8 mph NE 16%
Friday 70°F Mostly Sunny 5 to 9 mph N 8%

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 Sep 19, 2026.