Westport South Dakota Climate Data

Monthly Average Climate Data for Westport South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °F21.3 °F0.43 in.
February6.2 °F26.6 °F0.55 in.
March18.5 °F39.2 °F0.95 in.
April31.6 °F54.8 °F1.82 in.
May44.7 °F67.8 °F3.34 in.
June55.6 °F77.4 °F3.74 in.
July60.0 °F82.6 °F3.68 in.
August57.2 °F81.2 °F2.4 in.
September47.8 °F72.9 °F2.2 in.
October34.2 °F57.9 °F1.89 in.
November20.4 °F40.5 °F0.71 in.
December8.5 °F26.6 °F0.57 in.
Annual32.2 °F54.1 °F22.28 in.

Climate Data for Westport 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
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