Fort Thompson South Dakota Climate Data

Monthly Average Climate Data for Fort Thompson South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January7.1 °F28.8 °F0.45 in.
February10.9 °F33.7 °F0.57 in.
March21.3 °F45.6 °F0.9 in.
April32.9 °F57.6 °F1.99 in.
May45.6 °F69.0 °F3.08 in.
June56.8 °F79.4 °F3.75 in.
July62.4 °F87.0 °F2.8 in.
August59.9 °F85.0 °F2.5 in.
September50.5 °F77.1 °F1.94 in.
October36.1 °F61.3 °F1.7 in.
November23.1 °F45.3 °F0.5 in.
December12.5 °F32.5 °F0.47 in.
Annual34.9 °F58.5 °F20.65 in.

Climate Data for Fort Thompson South Dakota

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 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