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December Normals for Union, IA

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 18 35 26 0.05 39 0 2 18 34 26 0.05 39 0 3 17 34 26 0.05 39 0 4 17 33 25 0.05 40 0 5 16 33 25 0.05 40 0 6 16 33 24 0.05 41 0 7 16 32 24 0.04 41 0 8 15 32 23 0.04 42 0 9 15 31 23 0.04 42 0 10 14 31 23 0.04 42 0 11 14 31 22 0.04 43 0 12 14 30 22 0.04 43 0 13 13 30 22 0.04 44 0 14 13 30 21 0.04 44 0 15 12 29 21 0.04 44 0 16 12 29 21 0.04 45 0 17 12 29 20 0.03 45 0 18 11 28 20 0.03 45 0 19 11 28 20 0.03 45 0 20 11 28 19 0.03 46 0 21 10 27 19 0.03 46 0 22 10 27 19 0.03 46 0 23 10 27 18 0.03 47 0 24 10 27 18 0.03 47 0 25 9 26 18 0.03 47 0 26 9 26 18 0.03 47 0 27 9 26 17 0.03 48 0 28 8 26 17 0.03 48 0 29 8 26 17 0.03 48 0 30 8 25 17 0.03 48 0 31 8 25 17 0.03 49 0 Month 12 29 21 1.15 1370 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