Fromberg, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fromberg, a town in Carbon County, Montana.
This Afternoon
79°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5pm, then showers and thunderstorms likely. Mostly cloudy. High near 79, with temperatures falling to around 77 in the afternoon. East wind around 9 mph. Chance of precipitation is 60%.
7-day forecast for Fromberg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Chance Showers And Thunderstorms | 9 mph E | 61% |
| Tonight | 52°F | Showers And Thunderstorms | 7 to 10 mph NNW | 87% |
| Saturday | 61°F | Showers And Thunderstorms | 8 to 15 mph NNW | 98% |
| Saturday Night | 48°F | Showers And Thunderstorms | 8 to 13 mph NW | 88% |
| Sunday | 64°F | Rain Showers Likely | 7 mph NW | 67% |
| Sunday Night | 46°F | Mostly Cloudy | 2 to 6 mph WNW | 9% |
| Monday | 73°F | Sunny | 3 to 12 mph S | 0% |
| Monday Night | 48°F | Mostly Clear | 5 to 8 mph S | 1% |
| Tuesday | 78°F | Sunny | 6 mph SSW | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 3 mph SSE | 6% |
| Wednesday | 79°F | Sunny | 6 mph SSW | 5% |
| Wednesday Night | 50°F | Mostly Clear | 3 to 8 mph SSE | 2% |
| Thursday | 80°F | Sunny | 8 to 13 mph S | 1% |
| Thursday Night | 51°F | Partly Cloudy | 6 to 9 mph SSE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Fromberg (45.394, -108.901). Updated through the day.
Growing snapshot for Fromberg
Last spring frost
May 14
First fall frost
Sep 24
Growing season
129 days
Hardiness zone
5a
More local growing data for Fromberg: nearby ZIP 59029 weather · frost dates · planting calendar · Montana frost dates
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Climate data from the nearest NOAA station, Bridger 2 N, Mt (7.1 mi from Fromberg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.