Helena West Side, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helena West Side, a community in Lewis And Clark County, Montana.
Today
48°F
Mostly Sunny
Mostly sunny. High near 48, with temperatures falling to around 43 in the afternoon. North northwest wind around 2 mph.
7-day forecast for Helena West Side
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 48°F | Mostly Sunny | 2 mph NNW | 0% |
| Tonight | 30°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Thursday | 47°F | Partly Sunny | 5 to 9 mph WSW | 1% |
| Thursday Night | 32°F | Partly Cloudy | 7 to 12 mph WSW | 1% |
| Friday | 49°F | Mostly Sunny | 6 to 9 mph SW | 0% |
| Friday Night | 37°F | Mostly Cloudy | 7 to 15 mph SW | 0% |
| Saturday | 55°F | Mostly Sunny | 2 to 7 mph SSW | 0% |
| Saturday Night | 38°F | Partly Cloudy | 2 to 9 mph SSW | 0% |
| Sunday | 59°F | Mostly Sunny | 5 to 12 mph SW | 5% |
| Sunday Night | 37°F | Partly Cloudy | 3 to 10 mph WSW | 5% |
| Monday | 52°F | Partly Sunny | 3 mph SW | 1% |
| Monday Night | 37°F | Mostly Cloudy | 2 to 6 mph SW | 1% |
| Tuesday | 56°F | Mostly Sunny | 3 to 7 mph WSW | 2% |
| Tuesday Night | 39°F | Partly Cloudy | 5 to 8 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Helena West Side (46.596, -112.128). Updated through the day.
Growing snapshot for Helena West Side
Last spring frost
May 9
First fall frost
Sep 30
Growing season
142 days
Hardiness zone
4b
More local growing data for Helena West Side: nearby ZIP 59636 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Canyon Creek
Craig
East Helena
Helena
Helena Valley Northeast
Helena Valley Northwest
Helena Valley Southeast
Helena Valley West Central
Lincoln
Marysville
Milford Colony
Montana City
Rimini
South Hills
Spokane Creek
Unionville
Wolf Creek
York
Climate data from the nearest NOAA station, Helena Rgnl Ap, Mt (7.2 mi from Helena West Side). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.