Flat Willow Colony, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flat Willow Colony, a community in Musselshell County, Montana.
Tonight
29°F
Clear
Clear. Low around 29, with temperatures rising to around 31 overnight. West southwest wind 5 to 9 mph.
7-day forecast for Flat Willow Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 29°F | Clear | 5 to 9 mph WSW | 0% |
| Wednesday | 51°F | Sunny | 5 mph NNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 1 to 13 mph SSW | 0% |
| Thursday | 57°F | Sunny | 2 to 13 mph SW | 2% |
| Thursday Night | 32°F | Partly Cloudy | 2 to 7 mph W | 3% |
| Friday | 56°F | Sunny | 7 to 15 mph SW | 5% |
| Friday Night | 37°F | Partly Cloudy | 9 to 15 mph WSW | 5% |
| Saturday | 60°F | Sunny | 5 to 13 mph WSW | 0% |
| Saturday Night | 36°F | Partly Cloudy | 5 to 20 mph SW | 0% |
| Sunday | 65°F | Mostly Sunny | 10 to 22 mph SW | 0% |
| Sunday Night | 38°F | Mostly Cloudy | 6 to 12 mph W | 1% |
| Monday | 56°F | Mostly Sunny | 7 mph SW | 1% |
| Monday Night | 36°F | Mostly Cloudy | 5 to 9 mph SSW | 1% |
| Tuesday | 60°F | Mostly Sunny | 7 to 12 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Flat Willow Colony (46.725, -108.488). Updated through the day.
Growing snapshot for Flat Willow Colony
Last spring frost
May 20
First fall frost
Sep 21
Growing season
124 days
Hardiness zone
4b
More local growing data for Flat Willow Colony: nearby ZIP 59072 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Roundup, Mt (6.2 mi from Flat Willow Colony). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.