Mellette South Dakota Climate Data

Monthly Average Climate Data for Mellette South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January2.2 °F22.3 °F0.52 in.
February6.8 °F28.0 °F0.63 in.
March18.9 °F40.5 °F0.95 in.
April31.3 °F55.8 °F2.16 in.
May44.4 °F68.7 °F3.36 in.
June55.4 °F78.3 °F3.66 in.
July60.0 °F83.5 °F3.27 in.
August57.1 °F82.2 °F2.4 in.
September47.2 °F74.1 °F2.1 in.
October33.8 °F59.2 °F2.13 in.
November20.1 °F41.8 °F0.74 in.
December8.1 °F27.4 °F0.64 in.
Annual32.1 °F55.2 °F22.56 in.

Climate Data for Mellette South Dakota

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 4a : -30°F to -25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year