Alder, MT Weather & Growing Conditions
Tonight
27°F
Mostly Cloudy
Mostly cloudy, with a low around 27. South southeast wind 1 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 27°F | Mostly Cloudy | 1 to 6 mph SSE | 0% |
| Wednesday | 45°F | Mostly Sunny | 2 mph W | 0% |
| Wednesday Night | 27°F | Mostly Clear | 2 to 9 mph S | 0% |
| Thursday | 42°F | Mostly Sunny | 9 mph S | 11% |
| Thursday Night | 26°F | Partly Cloudy | 6 to 9 mph S | 11% |
| Friday | 42°F | Mostly Sunny | 6 to 10 mph S | 7% |
| Friday Night | 27°F | Mostly Cloudy | 7 to 16 mph S | 7% |
| Saturday | 45°F | Mostly Sunny | 3 to 8 mph S | 0% |
| Saturday Night | 29°F | Partly Cloudy | 8 to 15 mph S | 0% |
| Sunday | 50°F | Mostly Sunny | 9 to 13 mph S | 1% |
| Sunday Night | 32°F | Partly Cloudy | 8 to 15 mph S | 1% |
| Monday | 50°F | Partly Sunny | 3 to 10 mph S | 1% |
| Monday Night | 33°F | Mostly Cloudy | 8 to 14 mph S | 2% |
| Tuesday | 50°F | Partly Sunny | 7 to 12 mph S | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alder, MT
Last spring frost
Jun 6
First fall frost
Sep 14
Growing season
98 days
Hardiness zone
5a
Explore more for Alder, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Alder 17 S, Mt (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.