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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.