Hysham, MT Weather & Growing Conditions
Overnight
46°F
Mostly Clear
Mostly clear. Low around 46, with temperatures rising to around 48 overnight. South southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Mostly Clear | 2 mph SSW | 0% |
| Tuesday | 75°F | Sunny | 3 to 7 mph WNW | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 2 to 6 mph ESE | 1% |
| Wednesday | 85°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 5 mph E | 0% |
| Thursday | 92°F | Sunny | 2 to 7 mph WSW | 0% |
| Thursday Night | 61°F | Mostly Clear | 2 to 6 mph NE | 0% |
| Friday | 97°F | Sunny | 5 mph SW | 0% |
| Friday Night | 64°F | Partly Cloudy | 3 to 9 mph NNE | 0% |
| Saturday | 94°F | Sunny | 5 to 9 mph NW | 0% |
| Saturday Night | 65°F | Partly Cloudy | 7 mph ENE | 1% |
| Sunday | 92°F | Mostly Sunny | 5 to 9 mph NNE | 0% |
| Sunday Night | 65°F | Partly Cloudy | 8 mph NE | 10% |
| Monday | 90°F | Mostly Sunny | 9 mph NE | 5% |
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 Aug 4, 2026.