Fromberg, MT Weather & Growing Conditions
Overnight
45°F
Mostly Clear
Mostly clear. Low around 45, with temperatures rising to around 47 overnight. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Clear | 5 mph NE | 0% |
| Tuesday | 74°F | Sunny then Patchy Smoke | 3 to 13 mph NE | 0% |
| Tuesday Night | 50°F | Patchy Smoke | 3 to 13 mph SE | 4% |
| Wednesday | 83°F | Sunny | 5 mph WSW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 7 mph ESE | 0% |
| Thursday | 92°F | Sunny | 3 to 8 mph WSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 5 to 8 mph ENE | 0% |
| Friday | 96°F | Sunny | 6 mph SW | 0% |
| Friday Night | 61°F | Partly Cloudy | 6 to 9 mph NW | 0% |
| Saturday | 93°F | Sunny | 5 to 8 mph WNW | 0% |
| Saturday Night | 61°F | Mostly Clear | 6 to 9 mph NNE | 0% |
| Sunday | 91°F | Sunny | 5 to 8 mph N | 1% |
| Sunday Night | 61°F | Partly Cloudy | 7 to 12 mph NE | 6% |
| Monday | 89°F | Sunny | 5 to 10 mph N | 2% |
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 Aug 4, 2026.