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December Normals for Heron, MT

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 26 34 30 0.15 35 0 2 26 34 30 0.15 35 0 3 25 34 30 0.15 35 0 4 25 34 30 0.15 35 0 5 25 34 29 0.15 36 0 6 25 34 29 0.15 36 0 7 25 33 29 0.15 36 0 8 24 33 29 0.15 36 0 9 24 33 29 0.15 36 0 10 24 33 29 0.14 36 0 11 24 33 28 0.14 37 0 12 24 33 28 0.14 37 0 13 24 33 28 0.14 37 0 14 23 33 28 0.14 37 0 15 23 32 28 0.14 37 0 16 23 32 28 0.14 37 0 17 23 32 27 0.14 38 0 18 23 32 27 0.14 38 0 19 23 32 27 0.14 38 0 20 22 32 27 0.14 38 0 21 22 32 27 0.14 38 0 22 22 32 27 0.14 38 0 23 22 32 27 0.14 38 0 24 22 31 27 0.14 38 0 25 22 31 27 0.14 38 0 26 22 31 27 0.14 38 0 27 22 31 26 0.14 39 0 28 21 31 26 0.14 39 0 29 21 31 26 0.14 39 0 30 21 31 26 0.14 39 0 31 21 31 26 0.13 39 0 Month 23 32 28 4.42 1153 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