Custer, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Custer, a city in Custer County, South Dakota.
Today
62°F
Patchy Fog then Showers And Thunderstorms Likely
Patchy fog and a slight chance of showers and thunderstorms before 11am, then patchy fog and a chance of showers and thunderstorms between 11am and noon, then showers and thunderstorms likely. Cloudy, with a high near 62. East wind 2 to 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
7-day forecast for Custer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Patchy Fog then Showers And Thunderstorms Likely | 2 to 7 mph E | 64% |
| Tonight | 46°F | Showers And Thunderstorms | 7 mph E | 86% |
| Sunday | 54°F | Showers And Thunderstorms | 7 mph E | 88% |
| Sunday Night | 42°F | Showers And Thunderstorms | 1 to 5 mph NE | 93% |
| Monday | 56°F | Chance Rain Showers | 2 to 7 mph E | 45% |
| Monday Night | 43°F | Chance Rain Showers then Mostly Cloudy | 6 mph SE | 27% |
| Tuesday | 64°F | Mostly Sunny | 3 to 8 mph S | 11% |
| Tuesday Night | 47°F | Slight Chance Rain Showers | 3 to 7 mph S | 20% |
| Wednesday | 70°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 7 mph S | 24% |
| Wednesday Night | 48°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 30% |
| Thursday | 73°F | Sunny | 2 to 6 mph SW | 11% |
| Thursday Night | 49°F | Mostly Clear | 5 mph SW | 7% |
| Friday | 73°F | Mostly Sunny | 2 to 9 mph SW | 9% |
| Friday Night | 50°F | Slight Chance Rain Showers | 7 mph S | 19% |
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 Sep 19, 2026.