Helena Valley Northeast, MT Weather & Growing Conditions
This Afternoon
50°F
Mostly Sunny
Mostly sunny. High near 50, with temperatures falling to around 44 in the afternoon. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Mostly Sunny | 3 mph SE | 0% |
| Tonight | 26°F | Mostly Cloudy | 2 mph E | 0% |
| Wednesday | 49°F | Mostly Sunny | 1 mph NNW | 0% |
| Wednesday Night | 25°F | Mostly Clear then Patchy Fog | 2 mph S | 0% |
| Thursday | 50°F | Patchy Fog then Mostly Sunny | 1 to 5 mph SSW | 2% |
| Thursday Night | 27°F | Mostly Clear | 6 mph SSW | 2% |
| Friday | 52°F | Mostly Sunny | 5 to 9 mph S | 6% |
| Friday Night | 31°F | Partly Cloudy | 6 to 16 mph S | 6% |
| Saturday | 54°F | Mostly Sunny | 5 to 8 mph SSE | 0% |
| Saturday Night | 31°F | Partly Cloudy | 5 to 9 mph SSE | 0% |
| Sunday | 58°F | Mostly Sunny | 6 to 9 mph SSE | 1% |
| Sunday Night | 32°F | Partly Cloudy | 0 to 6 mph SW | 3% |
| Monday | 55°F | Partly Sunny | 0 to 3 mph S | 2% |
| Monday Night | 33°F | Mostly Cloudy | 3 mph SSW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Helena Valley Northeast, MT
Last spring frost
May 9
First fall frost
Sep 30
Growing season
142 days
Hardiness zone
4b
Explore more for Helena Valley Northeast, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Helena Rgnl Ap, Mt (8.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.