Pioneer Junction, MT Weather & Growing Conditions
This Afternoon
51°F
Partly Sunny
Partly sunny. High near 51, with temperatures falling to around 46 in the afternoon. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Partly Sunny | 0 mph | 1% |
| Tonight | 30°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 55°F | Mostly Sunny | 0 mph | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 1 mph SE | 8% |
| Thursday | 51°F | Slight Chance Rain And Snow | 3 mph S | 20% |
| Thursday Night | 35°F | Mostly Cloudy | 3 mph SSW | 10% |
| Friday | 53°F | Chance Light Rain | 5 mph SSW | 26% |
| Friday Night | 35°F | Chance Light Rain then Mostly Cloudy | 5 mph SSW | 26% |
| Saturday | 55°F | Partly Sunny | 2 mph S | 6% |
| Saturday Night | 35°F | Mostly Cloudy then Chance Light Rain | 2 mph ENE | 27% |
| Sunday | 59°F | Chance Light Rain | 5 mph SSW | 41% |
| Sunday Night | 36°F | Slight Chance Light Rain | 3 mph SSW | 18% |
| Monday | 54°F | Slight Chance Light Rain | 1 mph S | 16% |
| Monday Night | 36°F | Chance Light Rain | 2 mph SSE | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pioneer Junction, MT
Last spring frost
May 11
First fall frost
Oct 1
Growing season
142 days
Hardiness zone
6a
Explore more for Pioneer Junction, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Libby Dam (Base), Mt (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.