Mount Vernon South Dakota Climate Data

Monthly Average Climate Data for Mount Vernon South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.1 °F27.4 °F0.52 in.
February12.0 °F32.7 °F0.74 in.
March22.5 °F44.4 °F1.15 in.
April34.3 °F58.1 °F2.89 in.
May46.8 °F69.9 °F3.54 in.
June57.9 °F80.2 °F3.81 in.
July62.3 °F85.9 °F2.99 in.
August60.0 °F83.8 °F2.87 in.
September50.9 °F76.2 °F2.62 in.
October36.9 °F61.2 °F2.08 in.
November23.5 °F45.0 °F0.89 in.
December12.8 °F31.4 °F0.68 in.
Annual35.7 °F58 °F24.78 in.

Climate Data for Mount Vernon 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 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation