Jefferson South Dakota Climate Data

Monthly Average Climate Data for Jefferson South Dakota

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.4 °C-1.7 °C14.99 mm
February-10.1 °C1.3 °C18.54 mm
March-3.9 °C8.4 °C38.61 mm
April2.3 °C16.1 °C78.74 mm
May9.2 °C22.2 °C101.35 mm
June15.4 °C27.9 °C114.55 mm
July17.4 °C29.7 °C81.28 mm
August15.9 °C28.6 °C86.11 mm
September10.7 °C25 °C75.44 mm
October3.4 °C17.6 °C61.98 mm
November-3.8 °C8.4 °C31.5 mm
December-9.6 °C0.8 °C22.86 mm
Annual2.9 °C15.4 °C725.95 mm

Climate Data for Jefferson 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 : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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