Custer, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Custer, a city in Custer County, South Dakota.
Overnight
44°F
Areas Of Smoke
Areas of smoke. Mostly clear, with a low around 44. Northwest wind around 1 mph.
7-day forecast for Custer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Areas Of Smoke | 1 mph NW | 1% |
| Tuesday | 66°F | Areas Of Smoke | 1 to 5 mph SW | 9% |
| Tuesday Night | 47°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 20% |
| Wednesday | 74°F | Sunny | 2 to 7 mph SW | 6% |
| Wednesday Night | 52°F | Mostly Clear | 5 mph SW | 1% |
| Thursday | 84°F | Sunny | 2 to 6 mph N | 4% |
| Thursday Night | 56°F | Mostly Clear | 6 mph N | 1% |
| Friday | 87°F | Sunny | 3 to 7 mph SW | 2% |
| Friday Night | 59°F | Mostly Clear | 3 to 7 mph S | 1% |
| Saturday | 90°F | Sunny | 5 to 8 mph NW | 2% |
| Saturday Night | 59°F | Mostly Clear | 2 to 7 mph N | 2% |
| Sunday | 87°F | Mostly Sunny | 2 to 9 mph SE | 5% |
| Sunday Night | 59°F | Partly Cloudy | 3 to 8 mph NE | 13% |
| Monday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 9 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Custer (43.767, -103.600). Updated through the day.
Growing snapshot for Custer
Last spring frost
May 23
First fall frost
Sep 24
Growing season
122 days
Hardiness zone
5a
More local growing data for Custer: nearby ZIP 57730 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Custer Co Ap, Sd (1.9 mi from Custer). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.