Big Sandy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Sandy, a town in Hill County, Montana.
Today
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 45 in the afternoon. South southwest wind 1 to 6 mph.
7-day forecast for Big Sandy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 52°F | Sunny | 1 to 6 mph SSW | 0% |
| Tonight | 29°F | Mostly Cloudy then Areas Of Fog | 1 mph WSW | 0% |
| Wednesday | 43°F | Areas Of Fog | 2 mph W | 0% |
| Wednesday Night | 28°F | Patchy Fog | 0 to 3 mph SSE | 0% |
| Thursday | 51°F | Patchy Fog then Mostly Sunny | 5 mph SW | 1% |
| Thursday Night | 32°F | Partly Cloudy | 6 mph SW | 2% |
| Friday | 54°F | Sunny | 6 to 13 mph SW | 2% |
| Friday Night | 36°F | Partly Cloudy | 12 mph WSW | 8% |
| Saturday | 53°F | Mostly Sunny | 3 to 10 mph WSW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 3 to 7 mph S | 0% |
| Sunday | 61°F | Partly Sunny | 9 mph SSW | 2% |
| Sunday Night | 37°F | Mostly Cloudy | 3 to 8 mph WSW | 2% |
| Monday | 54°F | Partly Sunny | 5 mph SW | 2% |
| Monday Night | 36°F | Mostly Cloudy | 6 mph SSE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Big Sandy (48.179, -110.113). Updated through the day.
Growing snapshot for Big Sandy
Last spring frost
May 17
First fall frost
Sep 25
Growing season
128 days
Hardiness zone
4a
More local growing data for Big Sandy: nearby ZIP 59521 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Big Sandy, Mt (12.8 mi from Big Sandy). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.