Helena West Side, MT Weather & Growing Conditions
Overnight
29°F
Partly Cloudy
Partly cloudy, with a low around 29. West southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 29°F | Partly Cloudy | 2 mph WSW | 0% |
| Wednesday | 46°F | Mostly Sunny | 0 to 3 mph NNW | 0% |
| Wednesday Night | 28°F | Mostly Clear | 2 to 6 mph SSW | 0% |
| Thursday | 44°F | Partly Sunny | 5 to 8 mph W | 2% |
| Thursday Night | 29°F | Partly Cloudy | 9 mph WSW | 2% |
| Friday | 47°F | Mostly Sunny | 6 to 9 mph SW | 0% |
| Friday Night | 36°F | Mostly Cloudy | 6 to 13 mph SW | 0% |
| Saturday | 53°F | Mostly Sunny | 3 to 9 mph SSW | 0% |
| Saturday Night | 38°F | Partly Cloudy | 3 to 10 mph SSW | 0% |
| Sunday | 57°F | Mostly Sunny | 6 to 12 mph SW | 5% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 9 mph WSW | 5% |
| Monday | 50°F | Partly Sunny | 5 mph WSW | 1% |
| Monday Night | 37°F | Mostly Cloudy | 2 to 7 mph SW | 1% |
| Tuesday | 53°F | Mostly Sunny | 7 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Helena West Side, MT
Last spring frost
Jun 4
First fall frost
Sep 14
Growing season
100 days
Hardiness zone
4b
Explore more for Helena West Side, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Austin 1 W, Mt (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.