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December Normals for Geyser, MT

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 20 38 29 0.02 36 0 2 20 38 29 0.02 36 0 3 19 37 28 0.02 37 0 4 19 37 28 0.02 37 0 5 19 37 28 0.02 37 0 6 19 37 28 0.02 37 0 7 19 37 28 0.03 37 0 8 18 37 28 0.03 37 0 9 18 37 27 0.03 38 0 10 18 36 27 0.03 38 0 11 18 36 27 0.03 38 0 12 18 36 27 0.03 38 0 13 17 36 27 0.03 38 0 14 17 36 27 0.03 38 0 15 17 36 26 0.03 39 0 16 17 36 26 0.03 39 0 17 17 36 26 0.03 39 0 18 17 35 26 0.03 39 0 19 16 35 26 0.03 39 0 20 16 35 26 0.03 39 0 21 16 35 26 0.03 39 0 22 16 35 25 0.03 40 0 23 16 35 25 0.03 40 0 24 16 35 25 0.03 40 0 25 15 35 25 0.03 40 0 26 15 34 25 0.03 40 0 27 15 34 25 0.03 40 0 28 15 34 25 0.03 40 0 29 15 34 25 0.03 41 0 30 15 34 24 0.03 41 0 31 14 34 24 0.03 41 0 Month 17 36 26 0.87 1198 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