Helmville, MT Weather & Growing Conditions
Tonight
46°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 2am, then rain showers and patchy fog. Cloudy, with a low around 46. South southeast wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Showers And Thunderstorms Likely | 3 mph SSE | 85% |
| Saturday | 66°F | Rain Showers Likely | 3 mph NNE | 59% |
| Saturday Night | 40°F | Mostly Cloudy then Patchy Fog | 2 mph SSE | 4% |
| Sunday | 73°F | Patchy Fog then Sunny | 2 mph SW | 0% |
| Sunday Night | 43°F | Mostly Clear | 2 mph S | 0% |
| Monday | 75°F | Sunny | 3 mph SSW | 0% |
| Monday Night | 44°F | Mostly Clear | 0 to 3 mph SSW | 0% |
| Tuesday | 75°F | Sunny | 2 mph NNW | 0% |
| Tuesday Night | 44°F | Mostly Clear | 2 mph S | 2% |
| Wednesday | 74°F | Sunny | 3 mph SSW | 1% |
| Wednesday Night | 44°F | Mostly Clear | 2 mph SSE | 3% |
| Thursday | 77°F | Sunny | 2 mph SSE | 0% |
| Thursday Night | 45°F | Partly Cloudy | 1 to 6 mph ESE | 1% |
| Friday | 77°F | Mostly Sunny | 3 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Helmville, MT
Growing season
67 days
Hardiness zone
5a
Explore more for Helmville, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Ovando 9 Sse, Mt (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.