Iroquois, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a city in Kingsbury County, South Dakota.
This Afternoon
65°F
Mostly Cloudy
Mostly cloudy, with a high near 65. North northeast wind around 10 mph.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Mostly Cloudy | 10 mph NNE | 4% |
| Tonight | 54°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Sunday | 65°F | Mostly Cloudy | 10 to 15 mph NE | 9% |
| Sunday Night | 50°F | Rain Showers Likely | 10 mph ENE | 68% |
| Monday | 60°F | Rain Showers Likely | 5 to 10 mph ENE | 68% |
| Monday Night | 44°F | Mostly Cloudy | 5 mph E | 3% |
| Tuesday | 64°F | Partly Sunny | 5 to 10 mph SE | 2% |
| Tuesday Night | 47°F | Partly Cloudy | 10 to 15 mph SE | 3% |
| Wednesday | 66°F | Mostly Sunny | 15 to 20 mph SE | 11% |
| Wednesday Night | 52°F | Showers And Thunderstorms Likely | 15 mph SSE | 57% |
| Thursday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph SSE | 57% |
| Thursday Night | 54°F | Mostly Cloudy | 5 to 10 mph SE | 12% |
| Friday | 73°F | Partly Sunny | 10 to 15 mph SE | 12% |
| Friday Night | 58°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SE | 27% |
Forecast source: National Weather Service (api.weather.gov) for Iroquois (44.368, -97.850). Updated through the day.
Growing snapshot for Iroquois
Last spring frost
May 5
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
4b
More local growing data for Iroquois: nearby ZIP 57353 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, De Smet, Sd (14.1 mi from Iroquois). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.