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December Normals for Iona, SD

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 15 37 26 0.02 39 0 2 15 37 26 0.02 39 0 3 15 36 26 0.01 40 0 4 14 36 25 0.01 40 0 5 14 36 25 0.01 40 0 6 14 36 25 0.01 40 0 7 13 35 24 0.01 41 0 8 13 35 24 0.01 41 0 9 13 35 24 0.01 41 0 10 12 35 23 0.01 42 0 11 12 34 23 0.01 42 0 12 12 34 23 0.01 42 0 13 11 34 23 0.01 42 0 14 11 34 22 0.01 43 0 15 11 33 22 0.01 43 0 16 11 33 22 0.01 43 0 17 10 33 22 0.01 44 0 18 10 33 21 0.01 44 0 19 10 32 21 0.01 44 0 20 9 32 21 0.01 44 0 21 9 32 21 0.01 44 0 22 9 32 20 0.01 45 0 23 9 32 20 0.01 45 0 24 9 31 20 0.01 45 0 25 8 31 20 0.01 45 0 26 8 31 20 0.01 45 0 27 8 31 20 0.01 46 0 28 8 31 19 0.01 46 0 29 8 31 19 0.01 46 0 30 7 30 19 0.01 46 0 31 7 30 19 0.01 46 0 Month 11 33 22 0.33 1333 0 Data Controls Monthly: January February March April May June July August September October November December   | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather