Big Sandy, MT Weather & Growing Conditions
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy, with a high near 67. East southeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 7 mph ESE | 13% |
| Tonight | 49°F | Mostly Cloudy | 6 mph ESE | 14% |
| Sunday | 68°F | Mostly Sunny | 8 mph ESE | 5% |
| Sunday Night | 49°F | Partly Cloudy | 10 to 14 mph ESE | 0% |
| Monday | 73°F | Mostly Sunny | 8 to 12 mph SE | 0% |
| Monday Night | 51°F | Mostly Clear | 9 to 16 mph ESE | 0% |
| Tuesday | 77°F | Sunny | 6 mph S | 0% |
| Tuesday Night | 54°F | Partly Cloudy | 1 to 6 mph E | 1% |
| Wednesday | 77°F | Mostly Sunny | 5 mph SSW | 1% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph ESE | 7% |
| Thursday | 76°F | Mostly Sunny | 5 mph WNW | 3% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 12 mph E | 8% |
| Friday | 74°F | Mostly Sunny | 9 mph SE | 4% |
| Friday Night | 50°F | Mostly Cloudy then Chance Light Rain | 10 mph SE | 25% |
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 Sep 19, 2026.