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December Normals for Seymour, IL

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 26 42 34 0.09 31 0 2 25 41 33 0.09 32 0 3 25 41 33 0.09 32 0 4 25 41 33 0.09 32 0 5 24 40 32 0.09 33 0 6 24 40 32 0.09 33 0 7 24 39 32 0.09 33 0 8 23 39 31 0.09 34 0 9 23 39 31 0.09 34 0 10 23 38 30 0.08 35 0 11 22 38 30 0.08 35 0 12 22 37 30 0.08 35 0 13 22 37 29 0.08 36 0 14 22 37 29 0.08 36 0 15 21 36 29 0.08 36 0 16 21 36 29 0.08 36 0 17 21 36 28 0.08 37 0 18 20 36 28 0.08 37 0 19 20 35 28 0.08 37 0 20 20 35 27 0.08 38 0 21 19 35 27 0.07 38 0 22 19 34 27 0.07 38 0 23 19 34 26 0.07 39 0 24 18 34 26 0.07 39 0 25 18 34 26 0.07 39 0 26 18 33 26 0.07 39 0 27 17 33 25 0.07 40 0 28 17 33 25 0.07 40 0 29 17 33 25 0.07 40 0 30 17 33 25 0.06 40 0 31 16 32 24 0.06 41 0 Month 21 37 29 2.44 1125 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