Circle, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Circle, a town in Mccone County, Montana.
Tonight
26°F
Mostly Clear
Mostly clear, with a low around 26. South southwest wind around 1 mph.
7-day forecast for Circle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 26°F | Mostly Clear | 1 mph SSW | 0% |
| Wednesday | 53°F | Mostly Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 27°F | Mostly Cloudy | 2 mph WSW | 0% |
| Thursday | 56°F | Mostly Sunny | 1 to 8 mph S | 0% |
| Thursday Night | 31°F | Partly Cloudy | 2 to 6 mph SW | 0% |
| Friday | 55°F | Sunny | 2 to 12 mph WSW | 4% |
| Friday Night | 34°F | Partly Cloudy | 8 mph WSW | 5% |
| Saturday | 57°F | Sunny | 6 to 16 mph W | 5% |
| Saturday Night | 33°F | Mostly Clear | 6 mph SW | 0% |
| Sunday | 64°F | Mostly Sunny | 6 to 14 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 6 to 9 mph W | 0% |
| Monday | 56°F | Mostly Sunny | 3 to 9 mph W | 0% |
| Monday Night | 34°F | Partly Cloudy | 3 mph SW | 1% |
| Tuesday | 60°F | Mostly Sunny | 2 to 10 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Circle (47.418, -105.587). Updated through the day.
Growing snapshot for Circle
Last spring frost
May 17
First fall frost
Sep 22
Growing season
126 days
Hardiness zone
4a
More local growing data for Circle: nearby ZIP 59215 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Circle, Mt (10.8 mi from Circle). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.