Altamont South Dakota Climate Data

Monthly Average Climate Data for Altamont South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January3.2 °F21.2 °F0.68 in.
February7.0 °F25.6 °F0.81 in.
March19.0 °F38.0 °F1.38 in.
April31.5 °F53.2 °F2.65 in.
May44.6 °F66.1 °F3.37 in.
June55.3 °F75.6 °F4.23 in.
July60.0 °F80.9 °F3.45 in.
August57.6 °F78.8 °F3.1 in.
September48.8 °F70.9 °F2.74 in.
October35.4 °F57.0 °F2.31 in.
November21.9 °F40.2 °F1.12 in.
December9.6 °F26.5 °F0.93 in.
Annual32.8 °F52.8 °F26.77 in.

Climate Data for Altamont 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 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year