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December Normals for Grafton, IA

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 16 31 23 0.05 42 0 2 15 31 23 0.05 42 0 3 15 30 22 0.05 43 0 4 14 30 22 0.05 43 0 5 14 29 22 0.04 43 0 6 13 29 21 0.04 44 0 7 13 28 21 0.04 44 0 8 12 28 20 0.04 45 0 9 12 28 20 0.04 45 0 10 12 27 19 0.04 46 0 11 11 27 19 0.04 46 0 12 11 27 19 0.04 46 0 13 10 26 18 0.04 47 0 14 10 26 18 0.03 47 0 15 10 25 18 0.03 47 0 16 9 25 17 0.03 48 0 17 9 25 17 0.03 48 0 18 9 24 16 0.03 49 0 19 8 24 16 0.03 49 0 20 8 24 16 0.03 49 0 21 7 24 16 0.03 49 0 22 7 23 15 0.03 50 0 23 7 23 15 0.03 50 0 24 6 23 15 0.03 50 0 25 6 23 14 0.03 51 0 26 6 22 14 0.03 51 0 27 5 22 14 0.03 51 0 28 5 22 14 0.03 51 0 29 5 22 13 0.03 52 0 30 5 21 13 0.03 52 0 31 4 21 13 0.03 52 0 Month 10 26 18 1.1 1472 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