Custer, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Custer, a community in Yellowstone County, Montana.
Overnight
57°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 3am, then patchy fog and showers and thunderstorms. Cloudy. Low around 57, with temperatures rising to around 59 overnight. North wind around 6 mph. Chance of precipitation is 80%.
7-day forecast for Custer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Showers And Thunderstorms Likely | 6 mph N | 82% |
| Saturday | 63°F | Patchy Fog | 7 to 12 mph NNE | 98% |
| Saturday Night | 52°F | Patchy Fog | 7 to 10 mph NNE | 94% |
| Sunday | 63°F | Rain Showers | 7 mph NNE | 80% |
| Sunday Night | 50°F | Slight Chance Rain Showers then Areas Of Fog | 0 to 5 mph E | 18% |
| Monday | 73°F | Areas Of Fog then Mostly Sunny | 0 to 3 mph SSE | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph ESE | 0% |
| Tuesday | 78°F | Sunny | 0 to 3 mph SW | 0% |
| Tuesday Night | 52°F | Partly Cloudy then Slight Chance Rain Showers | 1 mph E | 15% |
| Wednesday | 80°F | Mostly Sunny | 0 to 3 mph SW | 6% |
| Wednesday Night | 52°F | Mostly Clear | 1 mph SSE | 5% |
| Thursday | 82°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 53°F | Mostly Clear | 2 mph SE | 1% |
| Friday | 82°F | Mostly Sunny | 1 to 5 mph SSW | 0% |
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 Sep 19, 2026.