Square Butte, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Square Butte, a community in Chouteau County, Montana.
This Afternoon
73°F
Partly Sunny
Partly sunny, with a high near 73. North wind around 9 mph.
7-day forecast for Square Butte
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Partly Sunny | 9 mph N | 7% |
| Tonight | 55°F | Cloudy then Chance Light Rain | 3 to 9 mph NNE | 31% |
| Saturday | 65°F | Chance Light Rain | 3 to 7 mph NE | 37% |
| Saturday Night | 52°F | Chance Light Rain | 3 to 7 mph SSE | 30% |
| Sunday | 70°F | Partly Sunny | 6 mph SE | 6% |
| Sunday Night | 48°F | Mostly Clear | 5 to 9 mph SE | 0% |
| Monday | 77°F | Sunny | 5 mph SE | 0% |
| Monday Night | 52°F | Mostly Clear | 7 mph SSE | 0% |
| Tuesday | 78°F | Sunny | 2 to 7 mph W | 1% |
| Tuesday Night | 53°F | Mostly Clear | 6 mph S | 0% |
| Wednesday | 79°F | Sunny | 2 to 6 mph WSW | 2% |
| Wednesday Night | 53°F | Mostly Clear | 7 mph SSW | 1% |
| Thursday | 80°F | Sunny | 2 to 7 mph SSE | 2% |
| Thursday Night | 54°F | Mostly Clear | 9 mph SSE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Square Butte (47.514, -110.199). Updated through the day.
Growing snapshot for Square Butte
Last spring frost
May 14
First fall frost
Sep 26
Growing season
134 days
Hardiness zone
4b
More local growing data for Square Butte: nearby ZIP 59446 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Carter
Floweree
Fort Benton
Geraldine
Highwood
Loma
Riverview Colony
Sunnybrook Colony
Twin Hills Colony
Climate data from the nearest NOAA station, Geraldine, Mt (6.3 mi from Square Butte). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.