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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.