Iroquois South Dakota Climate Data

Monthly Average Climate Data for Iroquois South Dakota

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-14.5 °C-3.8 °C13.97 mm
February-12.2 °C-0.8 °C17.27 mm
March-5.9 °C5.9 °C27.18 mm
April0.7 °C14.1 °C62.23 mm
May7.7 °C20.7 °C78.74 mm
June13.8 °C26.3 °C96.77 mm
July16.3 °C29.3 °C82.55 mm
August15 °C28.2 °C74.42 mm
September10 °C23.9 °C62.99 mm
October2.2 °C15.7 °C50.8 mm
November-5.3 °C6.4 °C21.08 mm
December-11.6 °C-1.2 °C17.78 mm
Annual1.4 °C13.7 °C605.78 mm

Climate Data for Iroquois South Dakota

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4b : -31.7°C to -28.9°C
Plant Hardiness Zone - 2012Zone 4b : -31.7°C to -28.9°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com