Basin, MT Weather & Growing Conditions
This Afternoon
44°F
Mostly Sunny
Mostly sunny. High near 44, with temperatures falling to around 36 in the afternoon. South wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Mostly Sunny | 3 mph S | 0% |
| Tonight | 24°F | Mostly Cloudy | 3 mph W | 0% |
| Wednesday | 42°F | Mostly Sunny | 2 mph WNW | 0% |
| Wednesday Night | 24°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Thursday | 40°F | Mostly Sunny | 7 mph WSW | 7% |
| Thursday Night | 23°F | Partly Cloudy | 5 to 10 mph WSW | 7% |
| Friday | 39°F | Mostly Sunny | 12 mph SW | 9% |
| Friday Night | 27°F | Mostly Cloudy | 9 to 21 mph WSW | 9% |
| Saturday | 42°F | Mostly Sunny | 6 to 12 mph SW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 6 to 15 mph SSW | 0% |
| Sunday | 48°F | Mostly Sunny | 9 to 14 mph SSW | 2% |
| Sunday Night | 31°F | Partly Cloudy | 8 to 13 mph SW | 2% |
| Monday | 45°F | Partly Sunny | 5 to 8 mph SW | 2% |
| Monday Night | 33°F | Mostly Cloudy | 5 to 13 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Basin, MT
Last spring frost
Jun 7
First fall frost
Sep 8
Growing season
90 days
Hardiness zone
5a
Explore more for Basin, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Boulder, Mt (13.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.