Custer South Dakota Climate Data

Monthly Average Climate Data for Custer South Dakota

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.8 °C2.6 °C10.41 mm
February-10.1 °C2.9 °C17.53 mm
March-6 °C7.3 °C26.42 mm
April-2.3 °C10.9 °C58.93 mm
May3.2 °C16.1 °C93.47 mm
June8.3 °C22.1 °C82.55 mm
July11.9 °C26.5 °C83.82 mm
August10.9 °C26.1 °C57.4 mm
September6.2 °C21.5 °C38.1 mm
October-0.3 °C13.3 °C38.35 mm
November-5.7 °C6.9 °C14.22 mm
December-9.6 °C2.5 °C10.67 mm
Annual-0.3 °C13.2 °C531.87 mm

Climate Data for Custer South Dakota

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 11 - Jun. 20
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5a : -28.9°C to -26.1°C
Plant Hardiness Zone - 2012Zone 4b : -31.7°C to -28.9°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation