Three Forks, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Three Forks, a city in Gallatin County, Montana.
Today
78°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 78. North northwest wind 0 to 5 mph.
7-day forecast for Three Forks
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Smoke | 0 to 5 mph NNW | 0% |
| Tonight | 45°F | Patchy Smoke then Mostly Clear | 0 to 5 mph NNW | 0% |
| Wednesday | 86°F | Sunny then Patchy Smoke | 0 to 3 mph WSW | 0% |
| Wednesday Night | 48°F | Patchy Smoke then Mostly Clear | 0 to 5 mph W | 0% |
| Thursday | 94°F | Sunny | 0 to 6 mph WNW | 0% |
| Thursday Night | 53°F | Mostly Clear | 0 to 9 mph NNW | 0% |
| Friday | 98°F | Sunny | 0 to 15 mph WSW | 0% |
| Friday Night | 54°F | Mostly Clear | 1 to 16 mph NW | 0% |
| Saturday | 95°F | Sunny | 0 to 8 mph WNW | 0% |
| Saturday Night | 54°F | Mostly Clear | 0 to 12 mph NW | 2% |
| Sunday | 93°F | Sunny | 0 to 6 mph N | 1% |
| Sunday Night | 54°F | Partly Cloudy | 1 to 12 mph NNW | 4% |
| Monday | 91°F | Sunny | 0 to 5 mph N | 1% |
| Monday Night | 54°F | Partly Cloudy | 2 to 10 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for Three Forks (45.890, -111.553). Updated through the day.
Growing snapshot for Three Forks
Last spring frost
May 9
First fall frost
Sep 27
Growing season
139 days
Hardiness zone
5a
More local growing data for Three Forks: nearby ZIP 59752 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Amsterdam
Belgrade
Bozeman
Bridger
Churchill
Four Corners
Gallatin Gateway
Gallatin River Ranch
Hebgen Lake Estates
King Arthur Park
Logan
Manhattan
Ponderosa Pines
Springhill
West Yellowstone
Wheatland
Willow Creek
Climate data from the nearest NOAA station, Trident, Mt (3.2 mi from Three Forks). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.