Custer South Dakota Climate Data

Monthly Average Climate Data for Custer South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.3 °F36.7 °F0.41 in.
February13.9 °F37.2 °F0.69 in.
March21.2 °F45.1 °F1.04 in.
April27.9 °F51.7 °F2.32 in.
May37.7 °F60.9 °F3.68 in.
June46.9 °F71.7 °F3.25 in.
July53.5 °F79.7 °F3.3 in.
August51.7 °F79.0 °F2.26 in.
September43.2 °F70.7 °F1.5 in.
October31.5 °F56.0 °F1.51 in.
November21.8 °F44.4 °F0.56 in.
December14.7 °F36.5 °F0.42 in.
Annual31.5 °F55.8 °F20.94 in.

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 : -20°F to -15°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