McAllister, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McAllister, a community in Madison County, Montana.
This Afternoon
51°F
Mostly Sunny
Mostly sunny. High near 51, with temperatures falling to around 46 in the afternoon. South wind 1 to 5 mph.
7-day forecast for McAllister
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Tonight | 26°F | Mostly Cloudy | 0 to 5 mph SSE | 0% |
| Wednesday | 49°F | Mostly Sunny | 1 mph N | 0% |
| Wednesday Night | 26°F | Mostly Clear | 0 to 9 mph W | 0% |
| Thursday | 50°F | Mostly Sunny | 7 to 12 mph SSW | 12% |
| Thursday Night | 26°F | Partly Cloudy | 7 to 10 mph SSW | 12% |
| Friday | 49°F | Mostly Sunny | 7 to 16 mph SSW | 7% |
| Friday Night | 28°F | Partly Cloudy | 10 to 21 mph S | 7% |
| Saturday | 52°F | Mostly Sunny | 8 to 12 mph SSW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 8 to 18 mph S | 0% |
| Sunday | 58°F | Mostly Sunny | 14 to 22 mph S | 1% |
| Sunday Night | 32°F | Mostly Cloudy | 7 to 18 mph S | 1% |
| Monday | 57°F | Partly Sunny | 8 mph S | 3% |
| Monday Night | 33°F | Mostly Cloudy | 8 to 14 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov) for McAllister (45.436, -111.725). Updated through the day.
Growing snapshot for McAllister
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
162 days
Hardiness zone
5a
More local growing data for McAllister: nearby ZIP 59740 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Alder
Big Sky
Brandon
Ennis
Harrison
Jeffers
Mammoth
Norris
Pony
Sheridan
Silver Star
Twin Bridges
Virginia City
Climate data from the nearest NOAA station, Norris Madison Pwr House, Mt (8.8 mi from McAllister). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.