Fort Benton, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Benton, a city in Chouteau County, Montana.
Tonight
53°F
Cloudy
Cloudy, with a low around 53. Northeast wind 5 to 9 mph.
7-day forecast for Fort Benton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Cloudy | 5 to 9 mph NE | 13% |
| Saturday | 69°F | Cloudy | 7 mph NE | 11% |
| Saturday Night | 51°F | Mostly Cloudy | 2 to 7 mph S | 7% |
| Sunday | 75°F | Mostly Sunny | 2 to 6 mph SE | 1% |
| Sunday Night | 49°F | Mostly Clear | 5 to 13 mph ESE | 0% |
| Monday | 81°F | Sunny | 5 mph SE | 0% |
| Monday Night | 51°F | Mostly Clear | 3 to 9 mph SSE | 0% |
| Tuesday | 80°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 5 mph SE | 0% |
| Wednesday | 81°F | Sunny | 5 mph WSW | 2% |
| Wednesday Night | 51°F | Mostly Clear | 5 mph SE | 2% |
| Thursday | 82°F | Sunny | 5 mph SSW | 1% |
| Thursday Night | 52°F | Partly Cloudy | 6 mph SE | 2% |
| Friday | 82°F | Mostly Sunny | 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Fort Benton (47.829, -110.656). Updated through the day.
Growing snapshot for Fort Benton
Last spring frost
May 15
First fall frost
Sep 22
Growing season
129 days
Hardiness zone
4a
More local growing data for Fort Benton: nearby ZIP 59442 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Carter
Floweree
Geraldine
Highwood
Loma
Riverview Colony
Square Butte
Sunnybrook Colony
Twin Hills Colony
Climate data from the nearest NOAA station, Ft Benton, Mt (6.8 mi from Fort Benton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.