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December Normals for Naples, IL

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 25 44 34 0.1 31 0 2 25 43 34 0.1 31 0 3 25 43 34 0.1 31 0 4 24 42 33 0.1 32 0 5 24 42 33 0.1 32 0 6 24 41 33 0.1 32 0 7 23 41 32 0.1 33 0 8 23 41 32 0.09 33 0 9 23 40 32 0.09 34 0 10 22 40 31 0.09 34 0 11 22 40 31 0.09 34 0 12 22 39 30 0.09 35 0 13 22 39 30 0.09 35 0 14 21 38 30 0.09 35 0 15 21 38 30 0.08 35 0 16 21 38 29 0.08 36 0 17 20 38 29 0.08 36 0 18 20 37 29 0.08 36 0 19 20 37 28 0.08 37 0 20 20 37 28 0.08 37 0 21 19 36 28 0.08 37 0 22 19 36 28 0.08 37 0 23 19 36 27 0.07 38 0 24 18 36 27 0.07 38 0 25 18 35 27 0.07 38 0 26 18 35 27 0.07 38 0 27 18 35 26 0.07 39 0 28 18 35 26 0.07 39 0 29 17 34 26 0.07 39 0 30 17 34 26 0.07 39 0 31 17 34 25 0.07 40 0 Month 21 38 30 2.6 1101 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