Fort Benton, MT Weather & Growing Conditions
Today
79°F
Sunny
Sunny, with a high near 79. West southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 3 mph WSW | 0% |
| Tonight | 50°F | Mostly Clear | 5 mph SSW | 1% |
| Wednesday | 88°F | Sunny | 5 to 8 mph W | 0% |
| Wednesday Night | 53°F | Mostly Clear | 3 to 8 mph WSW | 0% |
| Thursday | 95°F | Sunny | 5 to 9 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 5 to 9 mph E | 0% |
| Friday | 98°F | Sunny | 3 to 12 mph WSW | 0% |
| Friday Night | 59°F | Mostly Clear | 8 mph WNW | 0% |
| Saturday | 95°F | Sunny | 9 mph WNW | 0% |
| Saturday Night | 59°F | Mostly Clear | 8 mph NNE | 0% |
| Sunday | 92°F | Sunny | 9 mph NNW | 1% |
| Sunday Night | 58°F | Partly Cloudy | 9 mph NNE | 8% |
| Monday | 89°F | Sunny | 8 mph NNE | 6% |
| Monday Night | 58°F | Mostly Clear | 10 mph ENE | 13% |
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 Aug 4, 2026.