Iroquois, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a city in Kingsbury County, South Dakota.
Today
45°F
Rain Showers
Rain showers and patchy fog. Mostly cloudy, with a high near 45. Northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 45°F | Rain Showers | 15 to 20 mph NW | 97% |
| Tonight | 32°F | Mostly Cloudy | 15 mph NNW | 11% |
| Thursday | 43°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday Night | 25°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Friday | 44°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Friday Night | 27°F | Partly Cloudy | 5 mph SSE | 0% |
| Saturday | 54°F | Sunny | 5 to 10 mph SSW | 0% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 10 mph SSW | 0% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph S | 0% |
| Monday | 59°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 34°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 mph WSW | 0% |
| Tuesday Night | 37°F | Partly Cloudy | 5 mph SE | 0% |
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 Nov 4, 2026.