McAllister, MT Weather & Growing Conditions
Overnight
48°F
Showers And Thunderstorms
Showers and thunderstorms before 3am, then patchy fog and showers and thunderstorms. Mostly cloudy, with a low around 48. North wind around 2 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Showers And Thunderstorms | 2 mph N | 87% |
| Saturday | 55°F | Areas Of Fog | 1 to 8 mph NNE | 86% |
| Saturday Night | 42°F | Light Rain Likely | 0 to 6 mph NNW | 60% |
| Sunday | 64°F | Areas Of Fog then Partly Sunny | 0 to 3 mph E | 7% |
| Sunday Night | 42°F | Mostly Clear | 3 mph SE | 1% |
| Monday | 71°F | Sunny | 5 mph SW | 0% |
| Monday Night | 46°F | Mostly Clear | 1 to 5 mph W | 0% |
| Tuesday | 73°F | Mostly Sunny | 5 mph SW | 1% |
| Tuesday Night | 47°F | Partly Cloudy | 5 mph SW | 3% |
| Wednesday | 74°F | Sunny | 6 mph SSW | 5% |
| Wednesday Night | 48°F | Mostly Clear | 2 to 10 mph SSW | 5% |
| Thursday | 76°F | Sunny | 8 mph SSW | 1% |
| Thursday Night | 49°F | Mostly Clear | 5 to 10 mph SSW | 2% |
| Friday | 75°F | Mostly Sunny | 8 mph SSW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for McAllister, MT
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
162 days
Hardiness zone
5a
Explore more for McAllister, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Norris Madison Pwr House, Mt (8.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.