Custer, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Custer, a community in Yellowstone County, Montana.
Tonight
30°F
Patchy Fog
Patchy fog after 11pm. Mostly clear, with a low around 30. East northeast wind 0 to 5 mph.
7-day forecast for Custer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 30°F | Patchy Fog | 0 to 5 mph ENE | 0% |
| Wednesday | 51°F | Patchy Fog then Sunny | 0 to 7 mph W | 0% |
| Wednesday Night | 31°F | Patchy Fog | 2 mph SSW | 0% |
| Thursday | 55°F | Patchy Fog then Mostly Sunny | 1 to 5 mph SSW | 1% |
| Thursday Night | 33°F | Partly Cloudy | 2 mph SW | 2% |
| Friday | 56°F | Sunny | 2 to 9 mph SW | 5% |
| Friday Night | 38°F | Partly Cloudy | 5 to 8 mph WSW | 6% |
| Saturday | 60°F | Sunny | 2 to 10 mph SW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph SW | 0% |
| Sunday | 66°F | Mostly Sunny | 3 to 8 mph SW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 3 mph W | 0% |
| Monday | 58°F | Mostly Sunny | 3 mph WSW | 2% |
| Monday Night | 37°F | Mostly Cloudy | 2 mph SSW | 2% |
| Tuesday | 62°F | Mostly Sunny | 2 to 7 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Custer (46.129, -107.556). Updated through the day.
Growing snapshot for Custer
Last spring frost
May 22
First fall frost
Sep 22
Growing season
121 days
Hardiness zone
4b
More local growing data for Custer: nearby ZIP 59024 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Acton
Ballantine
Billings
Broadview
Huntley
Laurel
Lockwood
Mountain View Colony
Nibbe
Shepherd
Worden
Climate data from the nearest NOAA station, Pompeys Pillar 15N, Mt (11 mi from Custer). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.