Helena West Side, MT Weather & Growing Conditions
Overnight
28°F
Partly Cloudy
Partly cloudy. Low around 28, with temperatures rising to around 31 overnight. West wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 28°F | Partly Cloudy | 1 mph W | 0% |
| Wednesday | 50°F | Mostly Sunny | 2 mph W | 0% |
| Wednesday Night | 28°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Thursday | 49°F | Partly Sunny | 3 to 8 mph WSW | 1% |
| Thursday Night | 30°F | Partly Cloudy | 6 to 12 mph WSW | 1% |
| Friday | 51°F | Mostly Sunny | 6 to 9 mph SW | 0% |
| Friday Night | 36°F | Mostly Cloudy | 6 to 15 mph SW | 0% |
| Saturday | 57°F | Mostly Sunny | 2 to 6 mph S | 0% |
| Saturday Night | 36°F | Partly Cloudy | 2 to 9 mph SSW | 0% |
| Sunday | 61°F | Mostly Sunny | 3 to 10 mph SW | 4% |
| Sunday Night | 35°F | Partly Cloudy | 2 to 12 mph WSW | 4% |
| Monday | 54°F | Partly Sunny | 2 mph SW | 1% |
| Monday Night | 35°F | Mostly Cloudy | 5 mph SSW | 1% |
| Tuesday | 58°F | Mostly Sunny | 2 to 6 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
May 9
First fall frost
Sep 30
Growing season
142 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, Helena Rgnl Ap, Mt (7.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.