Harman US

Fromberg, MT Weather & Growing Conditions

Tonight
53°F
Showers And Thunderstorms
Showers and thunderstorms before midnight, then patchy fog and showers and thunderstorms. Cloudy. Low around 53, with temperatures rising to around 55 overnight. North northwest wind 7 to 10 mph. Chance of precipitation is 90%.

7-day forecast

WhenTempForecastWindPrecip
Tonight 53°F Showers And Thunderstorms 7 to 10 mph NNW 85%
Saturday 56°F Patchy Fog 10 to 15 mph NNW 92%
Saturday Night 46°F Patchy Fog 7 to 15 mph NW 93%
Sunday 59°F Rain Showers 7 mph NNW 76%
Sunday Night 45°F Slight Chance Rain Showers then Mostly Cloudy 6 mph SSE 15%
Monday 69°F Sunny 3 to 10 mph S 0%
Monday Night 48°F Mostly Clear 5 to 8 mph SSE 0%
Tuesday 74°F Sunny 5 to 9 mph SSW 0%
Tuesday Night 51°F Partly Cloudy 6 mph SE 9%
Wednesday 75°F Sunny 7 mph SSW 5%
Wednesday Night 52°F Mostly Clear 3 to 9 mph SSE 2%
Thursday 76°F Sunny 8 to 13 mph S 1%
Thursday Night 52°F Partly Cloudy 6 to 9 mph SSE 1%
Friday 77°F Mostly Sunny 9 to 14 mph S 3%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Fromberg, MT

Last spring frost
May 14
First fall frost
Sep 24
Growing season
129 days
Hardiness zone
5a

Explore more for Fromberg, MT: full frost dates · planting calendar · Montana frost dates

Climate data from the nearest NOAA station, Bridger 2 N, Mt (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.