McAllister, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McAllister, a community in Madison County, Montana.
Tonight
47°F
Showers And Thunderstorms
Showers and thunderstorms before 3am, then patchy fog and showers and thunderstorms. Cloudy. Low around 47, with temperatures rising to around 51 overnight. North wind 0 to 3 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for McAllister
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Showers And Thunderstorms | 0 to 3 mph N | 94% |
| Saturday | 57°F | Areas Of Fog | 0 to 9 mph NNE | 84% |
| Saturday Night | 44°F | Light Rain Likely then Areas Of Fog | 0 to 8 mph N | 58% |
| Sunday | 68°F | Areas Of Fog then Mostly Sunny | 2 mph NW | 8% |
| Sunday Night | 42°F | Mostly Clear | 2 to 6 mph SSE | 0% |
| Monday | 75°F | Sunny | 5 mph SW | 0% |
| Monday Night | 46°F | Mostly Clear | 1 to 5 mph SSW | 1% |
| Tuesday | 77°F | Mostly Sunny | 3 mph SW | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 6 mph S | 4% |
| Wednesday | 78°F | Sunny | 6 mph SSW | 4% |
| Wednesday Night | 46°F | Mostly Clear | 3 to 9 mph S | 1% |
| Thursday | 79°F | Sunny | 6 mph SSW | 3% |
| Thursday Night | 48°F | Partly Cloudy | 5 to 13 mph S | 1% |
| Friday | 80°F | Mostly Sunny | 9 mph SSW | 1% |
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
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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 Sep 19, 2026.