Custer, SD Weather & Growing Conditions
Today
66°F
Areas Of Smoke
Areas of smoke. Mostly sunny, with a high near 66. Southwest wind 1 to 5 mph, with gusts as high as 17 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Areas Of Smoke | 1 to 5 mph SW | 9% |
| Tonight | 48°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 21% |
| Wednesday | 75°F | Sunny | 1 to 7 mph SW | 6% |
| Wednesday Night | 53°F | Mostly Clear | 5 mph SW | 1% |
| Thursday | 84°F | Sunny | 2 to 7 mph NW | 3% |
| Thursday Night | 58°F | Mostly Clear | 2 to 6 mph N | 1% |
| Friday | 88°F | Sunny | 2 to 7 mph S | 2% |
| Friday Night | 61°F | Mostly Clear | 2 to 6 mph NE | 1% |
| Saturday | 90°F | Sunny | 3 to 8 mph NW | 2% |
| Saturday Night | 60°F | Mostly Clear | 2 to 7 mph NE | 2% |
| Sunday | 88°F | Mostly Sunny | 2 to 9 mph SE | 5% |
| Sunday Night | 60°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% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 3 to 9 mph NE | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Custer, SD
Last spring frost
May 23
First fall frost
Sep 24
Growing season
122 days
Hardiness zone
5a
Explore more for Custer, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Custer Co Ap, Sd (1.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.