Iroquois, SD Weather & Growing Conditions
This Afternoon
49°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 49, with temperatures falling to around 46 in the afternoon. North northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Chance Rain Showers | 20 to 25 mph NNW | 36% |
| Tonight | 35°F | Rain Showers | 15 to 20 mph NNW | 84% |
| Wednesday | 44°F | Rain Showers | 20 mph NW | 92% |
| Wednesday Night | 32°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph NNW | 22% |
| Thursday | 45°F | Partly Sunny | 10 to 15 mph N | 3% |
| Thursday Night | 28°F | Mostly Cloudy | 0 to 10 mph NE | 0% |
| Friday | 46°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 29°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 56°F | Mostly Sunny | 5 to 10 mph WSW | 4% |
| Saturday Night | 32°F | Mostly Clear | 5 mph WNW | 3% |
| Sunday | 57°F | Sunny | 5 to 10 mph SSW | 1% |
| Sunday Night | 37°F | Mostly Clear | 10 mph S | 0% |
| Monday | 59°F | Sunny | 10 to 15 mph W | 0% |
| Monday Night | 35°F | Mostly Clear | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iroquois, SD
Last spring frost
May 5
First fall frost
Oct 4
Growing season
151 days
Hardiness zone
4b
Explore more for Iroquois, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, De Smet, Sd (14.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.