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December Normals for Lyons, CO

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 20 41 31 0.02 34 0 2 20 41 31 0.02 34 0 3 20 41 30 0.02 35 0 4 20 41 30 0.02 35 0 5 19 41 30 0.02 35 0 6 19 40 30 0.02 35 0 7 19 40 30 0.01 35 0 8 19 40 30 0.01 36 0 9 19 40 29 0.01 36 0 10 19 40 29 0.01 36 0 11 18 40 29 0.01 36 0 12 18 40 29 0.01 36 0 13 18 40 29 0.01 36 0 14 18 39 29 0.01 36 0 15 18 39 29 0.01 36 0 16 18 39 28 0.01 36 0 17 18 39 28 0.01 37 0 18 18 39 28 0.01 37 0 19 18 39 28 0.01 37 0 20 17 39 28 0.01 37 0 21 17 39 28 0.01 37 0 22 17 39 28 0.01 37 0 23 17 39 28 0.01 37 0 24 17 39 28 0.01 37 0 25 17 39 28 0.01 37 0 26 17 39 28 0.01 37 0 27 17 39 28 0.01 37 0 28 17 39 28 0.01 37 0 29 17 39 28 0.01 37 0 30 17 38 28 0.01 37 0 31 18 38 28 0.01 37 0 Month 18 40 29 0.37 1122 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