Grant, MT Weather & Growing Conditions
Overnight
42°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 42. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Areas Of Smoke | 5 mph NE | 0% |
| Tuesday | 75°F | Areas Of Smoke | 2 to 10 mph NNE | 0% |
| Tuesday Night | 45°F | Areas Of Smoke | 3 to 12 mph NNW | 0% |
| Wednesday | 82°F | Patchy Smoke | 3 to 10 mph WSW | 0% |
| Wednesday Night | 48°F | Patchy Smoke then Mostly Clear | 5 to 10 mph W | 0% |
| Thursday | 88°F | Sunny | 6 to 14 mph WSW | 0% |
| Thursday Night | 54°F | Mostly Clear | 5 to 14 mph W | 0% |
| Friday | 91°F | Sunny | 6 to 18 mph WSW | 0% |
| Friday Night | 54°F | Mostly Clear | 7 to 18 mph W | 0% |
| Saturday | 89°F | Sunny | 6 to 18 mph WSW | 0% |
| Saturday Night | 55°F | Mostly Clear | 5 to 17 mph W | 0% |
| Sunday | 89°F | Sunny | 5 to 14 mph WSW | 1% |
| Sunday Night | 53°F | Mostly Clear | 3 to 17 mph N | 2% |
| Monday | 87°F | Sunny | 3 to 12 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grant, MT
Growing season
72 days
Hardiness zone
5a
Explore more for Grant, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Dillon 18 Wsw, Mt (10.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.