Iroquois, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a city in Kingsbury County, South Dakota.
Tonight
35°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 35, with temperatures rising to around 40 overnight. Northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Rain Showers Likely | 15 to 20 mph NW | 62% |
| Wednesday | 45°F | Rain Showers | 15 to 20 mph NW | 80% |
| Wednesday Night | 33°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph NNW | 20% |
| Thursday | 44°F | Mostly Cloudy | 10 to 15 mph N | 0% |
| Thursday Night | 27°F | Mostly Cloudy | 0 to 10 mph ENE | 0% |
| Friday | 44°F | Mostly Sunny | 0 to 5 mph SE | 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 WNW | 3% |
| Sunday | 57°F | Sunny | 5 to 10 mph SSW | 1% |
| Sunday Night | 36°F | Mostly Clear | 10 mph S | 0% |
| Monday | 59°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 35°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 56°F | Mostly Sunny | 5 to 10 mph SSW | 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.