Forsyth, MT Weather & Growing Conditions
This Afternoon
50°F
Sunny
Sunny. High near 50, with temperatures falling to around 44 in the afternoon. South southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Sunny | 5 mph SSW | 0% |
| Tonight | 30°F | Patchy Fog | 2 to 6 mph SSE | 0% |
| Wednesday | 48°F | Patchy Fog then Mostly Sunny | 5 mph W | 0% |
| Wednesday Night | 31°F | Patchy Fog | 2 mph SW | 0% |
| Thursday | 52°F | Patchy Fog then Mostly Sunny | 3 mph SSW | 0% |
| Thursday Night | 34°F | Partly Cloudy | 3 mph WNW | 1% |
| Friday | 54°F | Sunny | 3 to 8 mph WSW | 6% |
| Friday Night | 38°F | Partly Cloudy | 5 to 9 mph WSW | 7% |
| Saturday | 57°F | Sunny | 2 to 13 mph WSW | 2% |
| Saturday Night | 36°F | Mostly Clear | 5 mph SSW | 0% |
| Sunday | 63°F | Mostly Sunny | 3 to 7 mph SW | 0% |
| Sunday Night | 40°F | Partly Cloudy | 6 mph W | 0% |
| Monday | 56°F | Mostly Sunny | 2 to 6 mph WNW | 1% |
| Monday Night | 37°F | Partly Cloudy | 3 mph SSE | 1% |
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 Nov 4, 2026.