Big Sandy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Sandy, a town in Hill County, Montana.
Overnight
41°F
Mostly Clear
Mostly clear. Low around 41, with temperatures rising to around 44 overnight. South southwest wind around 2 mph.
7-day forecast for Big Sandy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Mostly Clear | 2 mph SSW | 0% |
| Tuesday | 78°F | Sunny | 5 mph WSW | 1% |
| Tuesday Night | 50°F | Mostly Clear | 5 mph SSW | 1% |
| Wednesday | 86°F | Mostly Sunny | 3 to 7 mph WSW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 3 to 7 mph ESE | 0% |
| Thursday | 93°F | Sunny | 5 to 8 mph WSW | 0% |
| Thursday Night | 56°F | Mostly Clear | 2 to 9 mph ENE | 0% |
| Friday | 96°F | Sunny | 2 to 9 mph SSW | 0% |
| Friday Night | 58°F | Clear | 6 mph E | 0% |
| Saturday | 93°F | Sunny | 6 mph WSW | 0% |
| Saturday Night | 58°F | Partly Cloudy | 6 mph NE | 0% |
| Sunday | 90°F | Mostly Sunny | 3 to 7 mph NNE | 1% |
| Sunday Night | 57°F | Partly Cloudy | 7 mph NE | 7% |
| Monday | 87°F | Mostly Sunny | 6 mph NE | 6% |
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 Aug 4, 2026.