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December Normals for Boyd, MT

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 17 40 29 0.02 36 0 2 17 40 28 0.02 37 0 3 17 39 28 0.02 37 0 4 17 39 28 0.02 37 0 5 17 39 28 0.02 37 0 6 16 39 28 0.02 37 0 7 16 39 28 0.02 38 0 8 16 39 27 0.01 38 0 9 16 39 27 0.01 38 0 10 16 38 27 0.01 38 0 11 15 38 27 0.01 38 0 12 15 38 27 0.01 38 0 13 15 38 27 0.01 38 0 14 15 38 26 0.01 39 0 15 15 38 26 0.02 39 0 16 15 38 26 0.02 39 0 17 15 38 26 0.02 39 0 18 14 37 26 0.02 39 0 19 14 37 26 0.02 39 0 20 14 37 26 0.02 39 0 21 14 37 26 0.02 40 0 22 14 37 25 0.02 40 0 23 14 37 25 0.02 40 0 24 14 37 25 0.02 40 0 25 13 37 25 0.02 40 0 26 13 36 25 0.02 40 0 27 13 36 25 0.02 40 0 28 13 36 25 0.02 40 0 29 13 36 25 0.02 40 0 30 13 36 24 0.02 41 0 31 13 36 24 0.02 41 0 Month 15 38 26 0.55 1202 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