Radersburg, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Radersburg, a community in Broadwater County, Montana.
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 52. North northwest wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Radersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 10 mph NNW | 97% |
| Saturday | 59°F | Showers And Thunderstorms | 6 to 10 mph N | 99% |
| Saturday Night | 48°F | Chance Light Rain | 2 to 6 mph WNW | 28% |
| Sunday | 67°F | Mostly Sunny | 2 to 6 mph S | 1% |
| Sunday Night | 45°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 75°F | Sunny | 3 to 8 mph S | 0% |
| Monday Night | 48°F | Mostly Clear | 3 mph W | 0% |
| Tuesday | 74°F | Sunny | 5 mph S | 1% |
| Tuesday Night | 48°F | Mostly Clear | 3 mph NW | 2% |
| Wednesday | 75°F | Sunny | 3 to 7 mph S | 1% |
| Wednesday Night | 48°F | Mostly Clear | 5 mph SW | 2% |
| Thursday | 76°F | Sunny | 7 mph S | 1% |
| Thursday Night | 49°F | Mostly Clear | 5 mph SSW | 2% |
| Friday | 77°F | Mostly Sunny | 5 to 8 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Radersburg (46.196, -111.631). Updated through the day.
Growing snapshot for Radersburg
Last spring frost
May 19
First fall frost
Sep 19
Growing season
122 days
Hardiness zone
5a
More local growing data for Radersburg: nearby ZIP 59643 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Townsend 3Se, Mt (12.9 mi from Radersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.