Hysham, MT Weather & Growing Conditions
Tonight
31°F
Mostly Clear
Mostly clear, with a low around 31. South southwest wind 1 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 31°F | Mostly Clear | 1 to 7 mph SSW | 0% |
| Wednesday | 47°F | Mostly Sunny | 1 to 5 mph WNW | 0% |
| Wednesday Night | 32°F | Patchy Fog | 0 to 5 mph SE | 0% |
| Thursday | 52°F | Sunny | 1 to 5 mph SSW | 1% |
| Thursday Night | 35°F | Partly Cloudy | 0 to 3 mph SSW | 1% |
| Friday | 52°F | Sunny | 3 to 9 mph SW | 8% |
| Friday Night | 39°F | Partly Cloudy | 5 to 10 mph SW | 8% |
| Saturday | 56°F | Sunny | 2 to 12 mph WSW | 1% |
| Saturday Night | 38°F | Mostly Clear | 2 to 6 mph SSW | 0% |
| Sunday | 62°F | Mostly Sunny | 5 to 9 mph SW | 0% |
| Sunday Night | 41°F | Mostly Cloudy | 5 mph W | 0% |
| Monday | 55°F | Mostly Sunny | 3 mph NNW | 2% |
| Monday Night | 38°F | Mostly Cloudy | 3 mph SSE | 2% |
| Tuesday | 58°F | Mostly Sunny | 3 to 7 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hysham, MT
Last spring frost
May 10
First fall frost
Sep 29
Growing season
141 days
Hardiness zone
4b
Explore more for Hysham, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Hysham, Mt (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.