Fromberg, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fromberg, a town in Carbon County, Montana.
Overnight
45°F
Mostly Clear
Mostly clear. Low around 45, with temperatures rising to around 48 overnight. North northwest wind around 3 mph.
7-day forecast for Fromberg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Clear | 3 mph NNW | 0% |
| Tuesday | 78°F | Sunny then Patchy Smoke | 2 to 12 mph NNE | 0% |
| Tuesday Night | 49°F | Patchy Smoke | 3 to 12 mph NNW | 2% |
| Wednesday | 87°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 53°F | Mostly Clear | 5 mph WNW | 0% |
| Thursday | 96°F | Sunny | 6 mph WSW | 0% |
| Thursday Night | 57°F | Mostly Clear | 7 mph NNW | 0% |
| Friday | 100°F | Sunny | 5 mph SSW | 0% |
| Friday Night | 61°F | Partly Cloudy | 9 mph WNW | 0% |
| Saturday | 97°F | Sunny | 5 to 8 mph NW | 0% |
| Saturday Night | 61°F | Partly Cloudy | 6 to 9 mph NNE | 0% |
| Sunday | 95°F | Sunny | 7 mph NNW | 2% |
| Sunday Night | 61°F | Partly Cloudy | 10 mph NNE | 7% |
| Monday | 92°F | Sunny | 6 to 9 mph N | 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
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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 Aug 4, 2026.