Heart Butte, MT Weather & Growing Conditions
Overnight
32°F
Mostly Cloudy
Mostly cloudy, with a low around 32. West wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Mostly Cloudy | 7 mph W | 0% |
| Wednesday | 49°F | Mostly Sunny | 5 mph NW | 0% |
| Wednesday Night | 33°F | Mostly Clear | 5 to 17 mph SW | 0% |
| Thursday | 44°F | Partly Sunny | 17 to 23 mph WSW | 2% |
| Thursday Night | 35°F | Partly Cloudy | 23 to 29 mph WSW | 1% |
| Friday | 46°F | Mostly Sunny | 28 to 32 mph WSW | 1% |
| Friday Night | 40°F | Mostly Cloudy | 16 to 37 mph WSW | 3% |
| Saturday | 54°F | Partly Sunny | 8 to 16 mph WSW | 3% |
| Saturday Night | 43°F | Mostly Cloudy | 8 to 12 mph SW | 2% |
| Sunday | 54°F | Slight Chance Light Rain | 12 to 31 mph WSW | 15% |
| Sunday Night | 38°F | Slight Chance Light Rain then Mostly Cloudy | 8 to 32 mph WSW | 15% |
| Monday | 48°F | Partly Sunny | 5 to 8 mph WSW | 2% |
| Monday Night | 38°F | Mostly Cloudy | 5 to 10 mph SW | 2% |
| Tuesday | 50°F | Partly Sunny | 10 to 21 mph WSW | 8% |
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 Nov 4, 2026.