Mound City, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mound City, a town in Campbell County, South Dakota.
This Afternoon
66°F
Patchy Fog
Patchy fog before 4pm. Cloudy, with a high near 66. East wind around 15 mph.
7-day forecast for Mound City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Patchy Fog | 15 mph E | 8% |
| Tonight | 53°F | Patchy Fog | 5 to 14 mph NE | 4% |
| Saturday | 68°F | Patchy Fog then Cloudy | 6 to 13 mph NE | 5% |
| Saturday Night | 51°F | Cloudy then Slight Chance Rain Showers | 9 to 13 mph ENE | 16% |
| Sunday | 64°F | Cloudy then Chance Rain Showers | 13 to 16 mph E | 39% |
| Sunday Night | 48°F | Chance Rain Showers | 7 to 14 mph E | 48% |
| Monday | 65°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph E | 44% |
| Monday Night | 46°F | Mostly Cloudy | 10 mph SE | 11% |
| Tuesday | 68°F | Partly Sunny | 9 to 20 mph SE | 3% |
| Tuesday Night | 50°F | Slight Chance Rain Showers | 15 to 18 mph SE | 15% |
| Wednesday | 73°F | Slight Chance Rain Showers | 20 mph SSE | 18% |
| Wednesday Night | 52°F | Chance Rain Showers | 9 to 18 mph SE | 30% |
| Thursday | 74°F | Slight Chance Rain Showers then Mostly Sunny | 8 to 12 mph SE | 21% |
| Thursday Night | 53°F | Partly Cloudy | 10 mph SE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Mound City (45.726, -100.069). Updated through the day.
Growing snapshot for Mound City
Last spring frost
May 8
First fall frost
Oct 1
Growing season
145 days
Hardiness zone
4b
More local growing data for Mound City: nearby ZIP 57646 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Selby, Sd (11.8 mi from Mound City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.