Grant, MT Weather & Growing Conditions
Today
56°F
Light Rain Likely then Chance Showers And Thunderstorms
Rain likely before noon, then a chance of showers and thunderstorms between noon and 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 56. Northeast wind 5 to 9 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 56°F | Light Rain Likely then Chance Showers And Thunderstorms | 5 to 9 mph NE | 76% |
| Tonight | 40°F | Chance Light Rain then Patchy Fog | 1 to 9 mph N | 33% |
| Sunday | 63°F | Patchy Fog then Partly Sunny | 2 to 6 mph W | 2% |
| Sunday Night | 40°F | Partly Cloudy | 5 mph ESE | 1% |
| Monday | 72°F | Sunny | 3 to 7 mph SW | 0% |
| Monday Night | 43°F | Mostly Clear | 6 mph SSW | 0% |
| Tuesday | 71°F | Mostly Sunny | 3 to 7 mph SSW | 2% |
| Tuesday Night | 43°F | Partly Cloudy | 6 mph SSW | 5% |
| Wednesday | 73°F | Sunny | 6 to 9 mph SSW | 3% |
| Wednesday Night | 44°F | Mostly Clear | 7 to 12 mph S | 2% |
| Thursday | 75°F | Sunny | 12 mph S | 2% |
| Thursday Night | 44°F | Partly Cloudy | 12 mph S | 3% |
| Friday | 74°F | Mostly Sunny | 9 to 13 mph SSW | 2% |
| Friday Night | 43°F | Mostly Cloudy | 9 to 13 mph SSW | 10% |
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 Sep 19, 2026.