Heart Butte, MT Weather & Growing Conditions
Overnight
40°F
Mostly Clear
Mostly clear. Low around 40, with temperatures rising to around 43 overnight. West wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 72°F | Mostly Sunny | 2 to 7 mph NE | 1% |
| Tuesday Night | 50°F | Mostly Clear | 6 to 10 mph WSW | 1% |
| Wednesday | 79°F | Mostly Sunny | 10 mph W | 0% |
| Wednesday Night | 55°F | Mostly Clear | 8 to 12 mph WSW | 0% |
| Thursday | 86°F | Sunny | 13 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 5 to 14 mph WSW | 0% |
| Friday | 88°F | Sunny | 3 to 20 mph W | 0% |
| Friday Night | 59°F | Clear | 12 to 18 mph W | 0% |
| Saturday | 85°F | Sunny | 6 to 17 mph W | 0% |
| Saturday Night | 57°F | Mostly Clear | 8 to 15 mph W | 0% |
| Sunday | 80°F | Mostly Sunny | 5 to 12 mph WNW | 1% |
| Sunday Night | 55°F | Partly Cloudy | 3 to 13 mph NW | 7% |
| Monday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 9 mph NNE | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Heart Butte, MT
Last spring frost
Jun 8
First fall frost
Sep 5
Growing season
88 days
Hardiness zone
4b
Explore more for Heart Butte, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, E Glacier, Mt (21.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.