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.
This Afternoon
76°F
Partly Sunny
Partly sunny. High near 76, with temperatures falling to around 74 in the afternoon. North northeast wind around 13 mph.
7-day forecast for Flat Willow Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Partly Sunny | 13 mph NNE | 6% |
| Tonight | 51°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 9 to 14 mph N | 79% |
| Saturday | 59°F | Showers And Thunderstorms | 16 mph NNE | 87% |
| Saturday Night | 49°F | Showers And Thunderstorms | 13 mph NNE | 86% |
| Sunday | 61°F | Rain Showers | 12 mph NNE | 77% |
| Sunday Night | 46°F | Mostly Cloudy | 3 to 8 mph ESE | 14% |
| Monday | 71°F | Mostly Sunny | 6 to 12 mph S | 0% |
| Monday Night | 48°F | Mostly Clear | 6 to 9 mph S | 0% |
| Tuesday | 77°F | Mostly Sunny | 7 mph SSW | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 5 mph S | 1% |
| Wednesday | 77°F | Sunny | 7 mph SSW | 6% |
| Wednesday Night | 50°F | Mostly Clear | 6 mph S | 3% |
| Thursday | 78°F | Sunny | 9 mph SSW | 2% |
| Thursday Night | 50°F | Partly Cloudy | 3 to 7 mph S | 2% |
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 Sep 19, 2026.