Hysham, MT Weather & Growing Conditions
Tonight
57°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely between 1am and 3am, then patchy fog and showers and thunderstorms. Cloudy. Low around 57, with temperatures rising to around 60 overnight. North wind 5 to 8 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Chance Showers And Thunderstorms | 5 to 8 mph N | 79% |
| Saturday | 61°F | Patchy Fog | 8 to 12 mph NNE | 99% |
| Saturday Night | 53°F | Patchy Fog | 12 mph NE | 94% |
| Sunday | 60°F | Rain Showers | 8 mph ENE | 89% |
| Sunday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 6 mph E | 17% |
| Monday | 70°F | Partly Sunny | 3 mph SE | 0% |
| Monday Night | 50°F | Mostly Clear | 2 to 6 mph SE | 0% |
| Tuesday | 76°F | Sunny | 3 mph SSW | 0% |
| Tuesday Night | 53°F | Partly Cloudy | 2 mph ESE | 5% |
| Wednesday | 78°F | Mostly Sunny | 3 mph SW | 3% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 3 mph SSE | 4% |
| Thursday | 79°F | Sunny | 3 mph S | 2% |
| Thursday Night | 54°F | Partly Cloudy | 5 mph ESE | 2% |
| Friday | 79°F | Mostly Sunny | 3 mph SSE | 4% |
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 Sep 19, 2026.