Helmville, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helmville, a community in Powell County, Montana.
This Afternoon
73°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. West northwest wind around 3 mph. Chance of precipitation is 50%.
7-day forecast for Helmville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Chance Showers And Thunderstorms | 3 mph WNW | 51% |
| Tonight | 44°F | Showers And Thunderstorms Likely | 0 to 3 mph E | 85% |
| Saturday | 67°F | Rain Showers Likely | 0 to 3 mph NNE | 60% |
| Saturday Night | 39°F | Mostly Cloudy then Areas Of Fog | 2 mph SE | 4% |
| Sunday | 73°F | Areas Of Fog then Sunny | 2 mph NW | 0% |
| Sunday Night | 42°F | Mostly Clear | 2 mph S | 0% |
| Monday | 76°F | Sunny | 3 mph SSW | 0% |
| Monday Night | 43°F | Mostly Clear | 0 to 3 mph SSW | 0% |
| Tuesday | 76°F | Sunny | 2 mph NW | 0% |
| Tuesday Night | 43°F | Mostly Clear | 2 mph SSE | 2% |
| Wednesday | 75°F | Sunny | 0 to 3 mph SW | 1% |
| Wednesday Night | 43°F | Mostly Clear | 3 mph SSE | 3% |
| Thursday | 78°F | Sunny | 1 mph S | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 6 mph ESE | 1% |
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 Sep 19, 2026.