Big Sandy, MT Weather & Growing Conditions
Today
42°F
Sunny
Sunny. High near 42, with temperatures falling to around 37 in the afternoon. West northwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 42°F | Sunny | 0 to 5 mph WNW | 0% |
| Tonight | 31°F | Mostly Clear | 1 to 7 mph ESE | 0% |
| Thursday | 49°F | Mostly Sunny | 6 mph SSW | 1% |
| Thursday Night | 33°F | Partly Cloudy | 7 mph WSW | 2% |
| Friday | 50°F | Sunny | 3 to 9 mph SW | 2% |
| Friday Night | 38°F | Partly Cloudy | 6 to 12 mph WSW | 2% |
| Saturday | 54°F | Mostly Sunny | 2 to 10 mph WSW | 0% |
| Saturday Night | 39°F | Partly Cloudy | 2 to 8 mph SSE | 0% |
| Sunday | 60°F | Partly Sunny | 5 to 13 mph SW | 1% |
| Sunday Night | 38°F | Partly Cloudy | 3 to 13 mph W | 1% |
| Monday | 51°F | Mostly Sunny | 6 mph WSW | 1% |
| Monday Night | 37°F | Mostly Cloudy | 6 mph SE | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 to 8 mph SW | 2% |
| Tuesday Night | 39°F | Partly Cloudy | 5 mph WSW | 2% |
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 Nov 4, 2026.