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December Normals for Willow Run, MI

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 27 40 33 0.1 32 0 2 27 39 33 0.1 32 0 3 26 39 33 0.1 32 0 4 26 39 32 0.1 33 0 5 26 38 32 0.1 33 0 6 25 38 31 0.1 33 0 7 25 37 31 0.1 34 0 8 25 37 31 0.1 34 0 9 24 37 30 0.1 35 0 10 24 36 30 0.1 35 0 11 24 36 30 0.1 35 0 12 23 36 29 0.09 36 0 13 23 35 29 0.09 36 0 14 23 35 29 0.09 36 0 15 22 35 29 0.09 37 0 16 22 34 28 0.09 37 0 17 22 34 28 0.09 37 0 18 21 34 28 0.09 37 0 19 21 33 27 0.09 38 0 20 21 33 27 0.09 38 0 21 21 33 27 0.09 38 0 22 20 33 27 0.09 38 0 23 20 33 26 0.09 39 0 24 20 32 26 0.09 39 0 25 20 32 26 0.09 39 0 26 19 32 26 0.08 39 0 27 19 32 25 0.08 40 0 28 19 31 25 0.08 40 0 29 19 31 25 0.08 40 0 30 19 31 25 0.08 40 0 31 18 31 25 0.08 40 0 Month 22 35 29 2.84 1132 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