Big Sandy, MT Weather & Growing Conditions
Today
73°F
Sunny
Sunny, with a high near 73. West southwest wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 1 to 6 mph WSW | 1% |
| Tonight | 52°F | Mostly Clear | 2 to 6 mph ENE | 1% |
| Wednesday | 81°F | Mostly Sunny | 3 to 8 mph WSW | 0% |
| Wednesday Night | 55°F | Mostly Clear | 7 mph ENE | 0% |
| Thursday | 88°F | Sunny | 5 to 9 mph WSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 6 to 9 mph NE | 0% |
| Friday | 91°F | Sunny | 6 to 10 mph S | 0% |
| Friday Night | 60°F | Mostly Clear | 8 mph ENE | 0% |
| Saturday | 88°F | Sunny | 6 to 9 mph W | 0% |
| Saturday Night | 60°F | Partly Cloudy | 5 to 9 mph NE | 0% |
| Sunday | 85°F | Mostly Sunny | 6 to 10 mph NNW | 1% |
| Sunday Night | 59°F | Partly Cloudy | 7 to 10 mph NE | 8% |
| Monday | 83°F | Mostly Sunny | 8 mph ENE | 8% |
| Monday Night | 58°F | Partly Cloudy then Slight Chance Rain Showers | 7 to 12 mph ENE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Big Sandy, MT
Last spring frost
May 17
First fall frost
Sep 25
Growing season
128 days
Hardiness zone
4a
Explore more for Big Sandy, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Big Sandy, Mt (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.