Stephan South Dakota Climate Data

Monthly Average Climate Data for Stephan South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January5.8 °F27.0 °F0.44 in.
February9.8 °F31.9 °F0.62 in.
March20.4 °F44.3 °F0.87 in.
April31.5 °F57.6 °F2.08 in.
May43.5 °F68.8 °F3.17 in.
June54.5 °F79.2 °F3.68 in.
July59.8 °F86.4 °F2.77 in.
August57.6 °F84.5 °F2.26 in.
September48.1 °F76.7 °F2.01 in.
October34.3 °F60.7 °F1.84 in.
November20.8 °F44.5 °F0.59 in.
December10.4 °F31.2 °F0.53 in.
Annual33 °F57.7 °F20.86 in.

Climate Data for Stephan South Dakota

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation