Garrison, MT Weather & Growing Conditions
Overnight
38°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 38. Northeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Patchy Smoke | 2 mph NE | 0% |
| Tuesday | 72°F | Patchy Smoke | 2 to 7 mph ENE | 0% |
| Tuesday Night | 45°F | Patchy Smoke then Mostly Clear | 1 to 8 mph N | 0% |
| Wednesday | 78°F | Sunny then Patchy Smoke | 2 to 10 mph W | 0% |
| Wednesday Night | 48°F | Patchy Smoke then Clear | 2 to 9 mph WSW | 0% |
| Thursday | 84°F | Sunny | 2 to 13 mph WSW | 0% |
| Thursday Night | 52°F | Clear | 2 to 12 mph WSW | 0% |
| Friday | 87°F | Sunny | 2 to 15 mph SW | 1% |
| Friday Night | 53°F | Mostly Clear | 7 to 21 mph W | 0% |
| Saturday | 85°F | Sunny | 2 to 13 mph SW | 0% |
| Saturday Night | 53°F | Mostly Clear | 5 to 15 mph WNW | 0% |
| Sunday | 83°F | Sunny | 2 to 10 mph N | 0% |
| Sunday Night | 51°F | Mostly Clear | 3 to 12 mph NNW | 0% |
| Monday | 81°F | Sunny | 2 to 8 mph NNE | 0% |
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 Aug 4, 2026.