Custer, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Custer, a city in Custer County, South Dakota.
This Afternoon
50°F
Mostly Sunny
Mostly sunny. High near 50, with temperatures falling to around 43 in the afternoon. Northwest wind around 6 mph, with gusts as high as 16 mph.
7-day forecast for Custer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Mostly Sunny | 6 mph NW | 0% |
| Tonight | 29°F | Mostly Clear | 5 mph NW | 0% |
| Wednesday | 52°F | Mostly Sunny | 6 mph N | 1% |
| Wednesday Night | 30°F | Mostly Cloudy | 5 mph NW | 1% |
| Thursday | 56°F | Mostly Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 33°F | Partly Cloudy | 1 to 5 mph W | 0% |
| Friday | 54°F | Mostly Sunny | 1 to 5 mph W | 2% |
| Friday Night | 32°F | Mostly Clear | 1 to 6 mph W | 4% |
| Saturday | 56°F | Sunny | 5 to 8 mph NW | 2% |
| Saturday Night | 33°F | Clear | 6 mph W | 1% |
| Sunday | 62°F | Sunny | 7 to 10 mph W | 0% |
| Sunday Night | 40°F | Mostly Clear | 6 to 10 mph NW | 0% |
| Monday | 58°F | Sunny | 6 mph W | 0% |
| Monday Night | 37°F | Partly Cloudy | 5 mph W | 0% |
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 Nov 3, 2026.