Garrison, MT Weather & Growing Conditions
Tonight
26°F
Mostly Cloudy
Mostly cloudy, with a low around 26. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 26°F | Mostly Cloudy | 2 mph E | 0% |
| Wednesday | 46°F | Mostly Sunny | 2 mph WNW | 0% |
| Wednesday Night | 26°F | Mostly Clear | 2 mph S | 0% |
| Thursday | 43°F | Mostly Sunny | 2 to 8 mph WSW | 5% |
| Thursday Night | 26°F | Partly Cloudy | 7 mph W | 3% |
| Friday | 46°F | Mostly Sunny | 6 to 9 mph WSW | 3% |
| Friday Night | 31°F | Mostly Cloudy | 8 to 16 mph WSW | 3% |
| Saturday | 52°F | Mostly Sunny | 1 to 8 mph SW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 1 to 10 mph S | 4% |
| Sunday | 55°F | Mostly Sunny | 8 to 16 mph SW | 4% |
| Sunday Night | 32°F | Mostly Cloudy | 3 to 12 mph W | 4% |
| Monday | 50°F | Partly Sunny | 3 mph WSW | 5% |
| Monday Night | 33°F | Mostly Cloudy | 1 to 5 mph WSW | 5% |
| Tuesday | 51°F | Mostly Sunny | 7 mph WSW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Garrison, MT
Growing season
65 days
Hardiness zone
4b
Explore more for Garrison, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Deer Lodge 3 W, Mt (13.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.