Fromberg, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fromberg, a town in Carbon County, Montana.
Tonight
28°F
Mostly Clear then Patchy Fog
Patchy fog after 5am. Mostly clear. Low around 28, with temperatures rising to around 31 overnight. South southwest wind 5 to 10 mph.
7-day forecast for Fromberg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Clear then Patchy Fog | 5 to 10 mph SSW | 0% |
| Wednesday | 54°F | Patchy Fog then Sunny | 1 to 6 mph WNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 2 to 14 mph WSW | 0% |
| Thursday | 57°F | Sunny | 2 to 14 mph SSW | 3% |
| Thursday Night | 30°F | Partly Cloudy | 3 mph WSW | 4% |
| Friday | 56°F | Sunny | 3 to 13 mph SSW | 2% |
| Friday Night | 33°F | Partly Cloudy | 10 to 15 mph SSW | 2% |
| Saturday | 59°F | Sunny | 13 mph SSW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 10 to 23 mph S | 0% |
| Sunday | 64°F | Mostly Sunny | 15 to 24 mph S | 0% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 15 mph SW | 0% |
| Monday | 60°F | Mostly Sunny | 5 mph SSE | 0% |
| Monday Night | 35°F | Partly Cloudy | 7 mph SSW | 0% |
| Tuesday | 62°F | Mostly Sunny | 8 mph SSW | 2% |
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
Nearby towns & communities
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Bridger
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Luther
Montaqua
Red Lodge
Roberts
Rockvale
Roscoe
Silesia
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 Nov 4, 2026.