Custer, SD Weather & Growing Conditions
This Afternoon
52°F
Mostly Sunny
Mostly sunny. High near 52, with temperatures falling to around 41 in the afternoon. North wind around 6 mph, with gusts as high as 16 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Mostly Sunny | 6 mph N | 0% |
| Tonight | 29°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 52°F | Mostly Sunny | 5 mph N | 1% |
| Wednesday Night | 31°F | Mostly Cloudy | 5 mph NW | 1% |
| Thursday | 56°F | Sunny | 1 to 5 mph W | 0% |
| Thursday Night | 34°F | Partly Cloudy | 1 to 5 mph W | 0% |
| Friday | 53°F | Mostly Sunny | 1 to 6 mph W | 1% |
| Friday Night | 33°F | Mostly Clear | 1 to 6 mph W | 4% |
| Saturday | 56°F | Sunny | 5 to 9 mph NW | 2% |
| Saturday Night | 34°F | Clear | 5 mph W | 1% |
| Sunday | 61°F | Sunny | 6 to 9 mph W | 0% |
| Sunday Night | 41°F | Mostly Clear | 6 to 9 mph NW | 0% |
| Monday | 58°F | Sunny | 6 mph W | 0% |
| Monday Night | 38°F | Partly Cloudy | 5 mph W | 0% |
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 Nov 4, 2026.