Letcher South Dakota Climate Data

Monthly Average Climate Data for Letcher South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January7.5 °F26.9 °F0.52 in.
February11.5 °F32.5 °F0.69 in.
March22.3 °F44.2 °F1.15 in.
April34.1 °F58.4 °F2.84 in.
May46.9 °F70.2 °F3.52 in.
June57.9 °F80.2 °F3.85 in.
July62.2 °F85.7 °F2.96 in.
August59.8 °F83.7 °F2.9 in.
September50.6 °F76.2 °F2.58 in.
October36.6 °F61.4 °F2.06 in.
November23.4 °F44.9 °F0.88 in.
December12.4 °F31.2 °F0.64 in.
Annual35.4 °F58 °F24.59 in.

Climate Data for Letcher 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
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