Iroquois, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a city in Kingsbury County, South Dakota.
Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North northwest wind around 10 mph.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Partly Cloudy | 10 mph NNW | 0% |
| Tuesday | 72°F | Partly Sunny | 5 to 10 mph NW | 3% |
| Tuesday Night | 52°F | Mostly Clear | 5 mph SW | 1% |
| Wednesday | 79°F | Sunny | 5 to 10 mph S | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 10 mph SSW | 1% |
| Thursday | 85°F | Sunny | 10 to 15 mph S | 4% |
| Thursday Night | 64°F | Mostly Clear | 10 to 15 mph S | 6% |
| Friday | 88°F | Sunny | 10 mph S | 6% |
| Friday Night | 64°F | Mostly Clear | 5 to 10 mph SSE | 5% |
| Saturday | 89°F | Sunny | 10 to 15 mph SE | 4% |
| Saturday Night | 65°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ESE | 17% |
| Sunday | 86°F | Mostly Sunny | 10 to 15 mph E | 9% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 24% |
| Monday | 86°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph E | 24% |
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 Aug 4, 2026.