Circle, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Circle, a town in Mccone County, Montana.
Overnight
44°F
Mostly Clear
Mostly clear, with a low around 44. Southwest wind around 5 mph.
7-day forecast for Circle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Mostly Clear | 5 mph SW | 0% |
| Tuesday | 73°F | Sunny | 6 to 14 mph W | 0% |
| Tuesday Night | 50°F | Mostly Clear | 0 to 9 mph WSW | 1% |
| Wednesday | 84°F | Partly Sunny | 6 to 10 mph WSW | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 8 mph SW | 0% |
| Thursday | 91°F | Sunny | 1 to 7 mph W | 0% |
| Thursday Night | 57°F | Mostly Clear | 3 to 9 mph N | 0% |
| Friday | 92°F | Sunny | 2 to 7 mph ESE | 0% |
| Friday Night | 59°F | Mostly Clear | 5 to 8 mph ENE | 0% |
| Saturday | 91°F | Sunny | 5 to 9 mph NE | 0% |
| Saturday Night | 59°F | Mostly Clear | 6 to 9 mph NE | 2% |
| Sunday | 91°F | Mostly Sunny | 7 to 12 mph ENE | 2% |
| Sunday Night | 59°F | Partly Cloudy | 7 to 12 mph NE | 9% |
| Monday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 to 12 mph ENE | 16% |
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 Aug 4, 2026.