Helena West Side, MT Weather & Growing Conditions
Overnight
43°F
Mostly Clear
Mostly clear, with a low around 43. South southwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Clear | 1 mph SSW | 0% |
| Tuesday | 73°F | Patchy Smoke | 1 to 7 mph NE | 0% |
| Tuesday Night | 48°F | Mostly Clear | 2 to 6 mph W | 1% |
| Wednesday | 82°F | Sunny | 2 to 8 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 3 to 7 mph W | 0% |
| Thursday | 88°F | Sunny | 3 to 10 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 3 to 9 mph W | 0% |
| Friday | 91°F | Sunny | 2 to 15 mph WSW | 1% |
| Friday Night | 59°F | Mostly Clear | 9 to 13 mph W | 0% |
| Saturday | 89°F | Sunny | 5 to 12 mph W | 0% |
| Saturday Night | 58°F | Mostly Clear | 6 to 9 mph W | 0% |
| Sunday | 86°F | Sunny | 3 to 8 mph NW | 1% |
| Sunday Night | 56°F | Mostly Clear | 3 to 8 mph WNW | 1% |
| Monday | 84°F | Sunny | 3 to 8 mph N | 1% |
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 Aug 4, 2026.