Harman US

Fort Benton, MT Weather & Growing Conditions

Tonight
53°F
Cloudy
Cloudy, with a low around 53. Northeast wind around 7 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 53°F Cloudy 7 mph NE 3%
Saturday 70°F Mostly Cloudy 7 mph ENE 2%
Saturday Night 50°F Mostly Cloudy 2 to 7 mph ESE 3%
Sunday 74°F Mostly Sunny 2 to 7 mph ESE 1%
Sunday Night 49°F Mostly Clear 5 to 14 mph SE 0%
Monday 81°F Sunny 6 mph SE 0%
Monday Night 50°F Mostly Clear 3 to 8 mph SSE 0%
Tuesday 79°F Sunny 5 mph WSW 0%
Tuesday Night 51°F Partly Cloudy 5 mph ESE 0%
Wednesday 80°F Sunny 5 mph WSW 2%
Wednesday Night 51°F Mostly Clear 5 mph SE 2%
Thursday 80°F Sunny 5 mph S 1%
Thursday Night 52°F Partly Cloudy 6 mph SE 2%
Friday 80°F Mostly Sunny 2 to 6 mph SSW 1%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Fort Benton, MT

Last spring frost
May 15
First fall frost
Sep 22
Growing season
129 days
Hardiness zone
4a

Explore more for Fort Benton, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Ft Benton, Mt (6.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.