Helmville, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helmville, a community in Powell County, Montana.
Today
78°F
Patchy Smoke
Patchy smoke between 10am and 3pm. Sunny, with a high near 78. North northwest wind 0 to 6 mph.
7-day forecast for Helmville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Smoke | 0 to 6 mph NNW | 0% |
| Tonight | 42°F | Mostly Clear | 0 to 6 mph NW | 0% |
| Wednesday | 83°F | Sunny | 0 to 6 mph NW | 0% |
| Wednesday Night | 45°F | Mostly Clear | 0 to 6 mph WSW | 0% |
| Thursday | 90°F | Sunny | 0 to 7 mph WNW | 0% |
| Thursday Night | 48°F | Mostly Clear | 1 to 8 mph SW | 0% |
| Friday | 93°F | Sunny | 0 to 12 mph NW | 0% |
| Friday Night | 48°F | Mostly Clear | 2 to 15 mph WSW | 0% |
| Saturday | 90°F | Sunny | 1 to 10 mph WSW | 0% |
| Saturday Night | 48°F | Mostly Clear | 0 to 10 mph W | 0% |
| Sunday | 87°F | Sunny | 0 to 7 mph NW | 0% |
| Sunday Night | 47°F | Mostly Clear | 0 to 8 mph N | 0% |
| Monday | 86°F | Sunny | 0 to 6 mph NNW | 0% |
| Monday Night | 47°F | Mostly Clear | 0 to 7 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Helmville (46.856, -112.967). Updated through the day.
Growing snapshot for Helmville
Growing season
67 days
Hardiness zone
5a
More local growing data for Helmville: nearby ZIP 59843 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ovando 9 Sse, Mt (2.8 mi from Helmville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.