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
72°F
Mostly Cloudy
Mostly cloudy, with a high near 72. Northeast wind around 5 mph.
7-day forecast for Big Sandy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Cloudy | 5 mph NE | 1% |
| Tonight | 48°F | Mostly Cloudy | 2 to 6 mph ESE | 4% |
| Sunday | 73°F | Patchy Fog then Mostly Sunny | 2 to 6 mph SE | 1% |
| Sunday Night | 49°F | Mostly Clear | 7 to 12 mph SE | 0% |
| Monday | 77°F | Sunny | 5 to 8 mph SSE | 0% |
| Monday Night | 50°F | Mostly Clear | 3 to 12 mph SSE | 0% |
| Tuesday | 79°F | Sunny | 5 mph SW | 0% |
| Tuesday Night | 50°F | Mostly Clear | 3 mph ESE | 0% |
| Wednesday | 80°F | Sunny | 1 to 5 mph SSW | 1% |
| Wednesday Night | 52°F | Mostly Clear | 1 to 6 mph SSE | 3% |
| Thursday | 81°F | Sunny | 3 mph SSW | 2% |
| Thursday Night | 53°F | Partly Cloudy | 5 to 8 mph SE | 9% |
| Friday | 78°F | Mostly Sunny | 6 mph S | 5% |
| Friday Night | 48°F | Slight Chance Light Rain | 7 mph NNE | 19% |
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 Sep 19, 2026.