Harman US

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

WhenTempForecastWindPrecip
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.