Forsyth, MT Weather & Growing Conditions
Today
76°F
Sunny
Sunny, with a high near 76. West northwest wind 3 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 3 to 8 mph WNW | 0% |
| Tonight | 51°F | Partly Cloudy | 3 to 7 mph ESE | 1% |
| Wednesday | 86°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 6 mph SSW | 0% |
| Thursday | 94°F | Sunny | 2 to 6 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 6 mph NE | 0% |
| Friday | 98°F | Sunny | 2 to 6 mph SW | 0% |
| Friday Night | 64°F | Partly Cloudy | 6 to 9 mph NE | 0% |
| Saturday | 96°F | Sunny | 5 to 10 mph NNW | 0% |
| Saturday Night | 64°F | Partly Cloudy | 7 mph ENE | 1% |
| Sunday | 94°F | Mostly Sunny | 6 to 10 mph NE | 0% |
| Sunday Night | 65°F | Partly Cloudy | 9 mph NE | 10% |
| Monday | 92°F | Mostly Sunny | 6 to 10 mph NE | 5% |
| Monday Night | 64°F | Partly Cloudy then Slight Chance Rain Showers | 10 mph ENE | 24% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Forsyth, MT
Last spring frost
May 9
First fall frost
Sep 29
Growing season
142 days
Hardiness zone
4b
Explore more for Forsyth, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Forsyth, Mt (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.