Three Forks, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Three Forks, a city in Gallatin County, Montana.
Tonight
50°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 50, with temperatures rising to around 54 overnight. North northwest wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Three Forks
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Showers And Thunderstorms | 6 mph NNW | 96% |
| Saturday | 60°F | Showers And Thunderstorms | 7 mph N | 95% |
| Saturday Night | 46°F | Chance Light Rain then Areas Of Fog | 0 to 5 mph NW | 43% |
| Sunday | 69°F | Areas Of Fog then Partly Sunny | 0 mph | 3% |
| Sunday Night | 42°F | Mostly Clear | 2 mph SE | 0% |
| Monday | 77°F | Sunny | 1 mph S | 0% |
| Monday Night | 44°F | Mostly Clear | 2 mph ENE | 1% |
| Tuesday | 77°F | Mostly Sunny | 0 mph | 1% |
| Tuesday Night | 45°F | Partly Cloudy | 1 mph E | 3% |
| Wednesday | 77°F | Sunny | 1 mph SSW | 1% |
| Wednesday Night | 45°F | Mostly Clear | 2 mph SSE | 2% |
| Thursday | 78°F | Sunny | 0 mph | 1% |
| Thursday Night | 45°F | Mostly Clear | 1 mph SSE | 1% |
| Friday | 79°F | Mostly Sunny | 2 mph SSW | 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 Sep 19, 2026.