Interior South Dakota Climate Data

Monthly Average Climate Data for Interior South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.5 °F35.5 °F0.43 in.
February15.0 °F39.1 °F0.55 in.
March23.9 °F50.0 °F1.12 in.
April33.5 °F61.0 °F2.28 in.
May44.9 °F71.0 °F3.46 in.
June55.3 °F81.5 °F3.43 in.
July61.8 °F90.0 °F2.35 in.
August59.4 °F89.7 °F1.73 in.
September49.3 °F80.8 °F1.32 in.
October36.2 °F65.0 °F1.6 in.
November23.4 °F48.8 °F0.55 in.
December14.6 °F37.3 °F0.49 in.
Annual35.8 °F62.5 °F19.31 in.

Climate Data for Interior South Dakota

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate