Alder, MT Weather & Growing Conditions
This Afternoon
54°F
Showers And Thunderstorms
Showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 54. North wind 2 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Showers And Thunderstorms | 2 to 6 mph N | 77% |
| Tonight | 41°F | Chance Showers And Thunderstorms then Patchy Fog | 1 to 7 mph S | 35% |
| Sunday | 61°F | Patchy Fog then Mostly Sunny | 0 to 5 mph WNW | 2% |
| Sunday Night | 40°F | Mostly Clear | 5 mph ESE | 1% |
| Monday | 68°F | Sunny | 1 to 5 mph SW | 1% |
| Monday Night | 43°F | Mostly Clear | 5 to 8 mph SSW | 0% |
| Tuesday | 71°F | Mostly Sunny | 2 to 6 mph S | 2% |
| Tuesday Night | 46°F | Mostly Cloudy | 5 to 9 mph S | 12% |
| Wednesday | 71°F | Mostly Sunny | 6 to 10 mph SSW | 5% |
| Wednesday Night | 46°F | Partly Cloudy | 10 to 15 mph S | 6% |
| Thursday | 73°F | Sunny | 10 to 17 mph S | 2% |
| Thursday Night | 48°F | Partly Cloudy | 15 to 18 mph S | 1% |
| Friday | 73°F | Mostly Sunny | 12 to 20 mph S | 3% |
| Friday Night | 46°F | Mostly Cloudy | 13 to 17 mph S | 6% |
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 Sep 19, 2026.