Helena West Side, MT Weather & Growing Conditions
Tonight
51°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 51. North wind 3 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms | 3 to 8 mph N | 98% |
| Saturday | 56°F | Showers And Thunderstorms | 7 mph NNE | 95% |
| Saturday Night | 46°F | Chance Light Rain | 5 mph WNW | 32% |
| Sunday | 68°F | Mostly Sunny | 6 mph WNW | 1% |
| Sunday Night | 45°F | Mostly Clear | 5 mph S | 0% |
| Monday | 73°F | Sunny | 6 mph WSW | 0% |
| Monday Night | 47°F | Mostly Clear | 6 mph W | 0% |
| Tuesday | 72°F | Sunny | 6 mph NW | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph WSW | 1% |
| Wednesday | 73°F | Sunny | 6 mph WSW | 2% |
| Wednesday Night | 49°F | Mostly Clear | 5 mph WSW | 3% |
| Thursday | 74°F | Sunny | 6 mph SSE | 1% |
| Thursday Night | 50°F | Partly Cloudy | 7 mph S | 2% |
| Friday | 74°F | Mostly Sunny | 7 mph SSW | 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 Sep 19, 2026.