Harman US

Fort Benton, MT Weather & Growing Conditions

Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. Northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 52°F Mostly Cloudy 5 mph NE 3%
Saturday 72°F Mostly Cloudy 7 mph ENE 2%
Saturday Night 48°F Mostly Cloudy 2 to 7 mph ESE 3%
Sunday 74°F Mostly Sunny 2 to 8 mph ESE 0%
Sunday Night 49°F Mostly Clear 6 to 13 mph SE 0%
Monday 81°F Sunny 6 mph SSE 0%
Monday Night 50°F Mostly Clear 3 to 8 mph SSE 0%
Tuesday 80°F Sunny 3 mph WSW 0%
Tuesday Night 51°F Partly Cloudy 5 mph ESE 0%
Wednesday 81°F Sunny 3 mph SW 1%
Wednesday Night 51°F Partly Cloudy 6 mph S 3%
Thursday 81°F Sunny 5 mph SSW 1%
Thursday Night 52°F Partly Cloudy 3 to 7 mph ESE 8%
Friday 78°F Mostly Sunny 3 to 7 mph S 7%

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.