Three Forks, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Three Forks, a city in Gallatin County, Montana.
This Afternoon
47°F
Mostly Sunny
Mostly sunny. High near 47, with temperatures falling to around 43 in the afternoon. Wind around 0 mph.
7-day forecast for Three Forks
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 25°F | Patchy Fog | 0 mph | 0% |
| Wednesday | 45°F | Patchy Fog then Partly Sunny | 0 mph | 0% |
| Wednesday Night | 24°F | Areas Of Fog | 0 mph | 0% |
| Thursday | 49°F | Areas Of Fog then Mostly Sunny | 2 mph WSW | 9% |
| Thursday Night | 26°F | Partly Cloudy | 1 mph SW | 9% |
| Friday | 50°F | Mostly Sunny | 1 to 6 mph SSW | 4% |
| Friday Night | 28°F | Partly Cloudy | 2 to 10 mph SW | 4% |
| Saturday | 52°F | Mostly Sunny | 2 mph SSW | 0% |
| Saturday Night | 27°F | Partly Cloudy | 1 mph S | 0% |
| Sunday | 57°F | Mostly Sunny | 1 mph SSW | 1% |
| Sunday Night | 29°F | Mostly Cloudy | 2 mph SW | 1% |
| Monday | 53°F | Partly Sunny | 0 mph | 1% |
| Monday Night | 30°F | Mostly Cloudy | 0 mph | 1% |
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 Nov 3, 2026.