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December Normals for Siam, IA

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 20 40 30 0.06 35 0 2 20 39 29 0.06 36 0 3 19 39 29 0.05 36 0 4 19 38 29 0.05 36 0 5 19 38 28 0.05 37 0 6 18 38 28 0.05 37 0 7 18 37 28 0.05 37 0 8 17 37 27 0.04 38 0 9 17 36 27 0.04 38 0 10 17 36 26 0.04 39 0 11 16 36 26 0.04 39 0 12 16 35 26 0.04 39 0 13 16 35 25 0.04 40 0 14 15 35 25 0.04 40 0 15 15 34 25 0.03 40 0 16 15 34 25 0.03 40 0 17 15 34 24 0.03 41 0 18 14 34 24 0.03 41 0 19 14 33 24 0.03 41 0 20 14 33 23 0.03 42 0 21 13 33 23 0.03 42 0 22 13 32 23 0.03 42 0 23 13 32 23 0.03 42 0 24 13 32 22 0.03 43 0 25 12 32 22 0.03 43 0 26 12 32 22 0.03 43 0 27 12 31 22 0.03 43 0 28 12 31 21 0.03 44 0 29 12 31 21 0.03 44 0 30 11 31 21 0.03 44 0 31 11 31 21 0.03 44 0 Month 15 35 25 1.16 1246 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