Circle, MT Weather & Growing Conditions
This Afternoon
78°F
Sunny
Sunny, with a high near 78. North wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 7 mph N | 1% |
| Tonight | 54°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 to 10 mph NNE | 30% |
| Saturday | 64°F | Showers And Thunderstorms Likely | 9 to 14 mph ENE | 67% |
| Saturday Night | 50°F | Rain Showers | 12 mph ENE | 84% |
| Sunday | 61°F | Rain Showers Likely | 13 mph E | 71% |
| Sunday Night | 48°F | Mostly Cloudy | 5 to 10 mph ESE | 9% |
| Monday | 69°F | Mostly Sunny | 6 to 13 mph SE | 3% |
| Monday Night | 50°F | Mostly Clear | 12 mph SSE | 0% |
| Tuesday | 77°F | Sunny | 10 mph SSE | 0% |
| Tuesday Night | 52°F | Mostly Clear | 6 mph SSE | 0% |
| Wednesday | 78°F | Sunny | 2 to 6 mph S | 6% |
| Wednesday Night | 53°F | Mostly Clear | 3 mph S | 5% |
| Thursday | 79°F | Sunny | 3 to 8 mph SSE | 1% |
| Thursday Night | 54°F | Mostly Clear | 7 mph SE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Circle, MT
Last spring frost
May 17
First fall frost
Sep 22
Growing season
126 days
Hardiness zone
4a
Explore more for Circle, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Circle, Mt (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.