Hysham, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hysham, a town in Treasure County, Montana.
Tonight
30°F
Mostly Clear then Patchy Fog
Patchy fog after 2am. Mostly clear, with a low around 30. East wind 0 to 6 mph.
7-day forecast for Hysham
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 30°F | Mostly Clear then Patchy Fog | 0 to 6 mph E | 0% |
| Wednesday | 49°F | Patchy Fog then Mostly Sunny | 0 to 5 mph NW | 0% |
| Wednesday Night | 31°F | Patchy Fog | 2 mph SW | 0% |
| Thursday | 54°F | Patchy Fog then Mostly Sunny | 1 to 5 mph SSW | 1% |
| Thursday Night | 34°F | Partly Cloudy | 2 mph WSW | 1% |
| Friday | 55°F | Sunny | 2 to 8 mph SW | 7% |
| Friday Night | 38°F | Partly Cloudy | 3 to 8 mph WSW | 7% |
| Saturday | 59°F | Sunny | 2 to 10 mph WSW | 1% |
| Saturday Night | 36°F | Mostly Clear | 3 mph SSW | 0% |
| Sunday | 64°F | Mostly Sunny | 3 to 9 mph SW | 0% |
| Sunday Night | 39°F | Partly Cloudy | 3 mph W | 0% |
| Monday | 57°F | Mostly Sunny | 3 mph WNW | 2% |
| Monday Night | 37°F | Partly Cloudy | 2 mph S | 2% |
| Tuesday | 60°F | Mostly Sunny | 2 to 6 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hysham (46.291, -107.230). Updated through the day.
Growing snapshot for Hysham
Last spring frost
May 10
First fall frost
Sep 29
Growing season
141 days
Hardiness zone
4b
More local growing data for Hysham: nearby ZIP 59038 weather · frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Hysham, Mt (4.8 mi from Hysham). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.