Fort Benton, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Benton, a city in Chouteau County, Montana.
Today
80°F
Sunny
Sunny, with a high near 80. West wind around 3 mph.
7-day forecast for Fort Benton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 3 mph W | 0% |
| Tonight | 50°F | Mostly Clear | 6 mph SSW | 1% |
| Wednesday | 88°F | Mostly Sunny | 5 to 8 mph W | 0% |
| Wednesday Night | 54°F | Mostly Clear | 3 to 7 mph SW | 0% |
| Thursday | 96°F | Sunny | 5 to 9 mph W | 0% |
| Thursday Night | 57°F | Mostly Clear | 5 to 8 mph E | 0% |
| Friday | 99°F | Sunny | 2 to 12 mph WSW | 0% |
| Friday Night | 59°F | Mostly Clear | 8 mph W | 0% |
| Saturday | 96°F | Sunny | 9 mph W | 0% |
| Saturday Night | 59°F | Mostly Clear | 8 mph N | 0% |
| Sunday | 93°F | Sunny | 8 mph NW | 1% |
| Sunday Night | 58°F | Partly Cloudy | 8 mph NE | 7% |
| Monday | 90°F | Sunny | 8 mph NE | 7% |
| Monday Night | 58°F | Mostly Clear | 7 to 10 mph ENE | 14% |
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
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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 Aug 4, 2026.