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December Normals for Sisters, OR

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 26 37 32 0.33 33 0 2 25 37 31 0.33 34 0 3 25 37 31 0.33 34 0 4 25 37 31 0.32 34 0 5 25 37 31 0.32 34 0 6 25 37 31 0.32 34 0 7 24 37 31 0.31 34 0 8 24 37 31 0.31 34 0 9 24 37 30 0.31 35 0 10 24 37 30 0.31 35 0 11 24 37 30 0.3 35 0 12 24 37 30 0.3 35 0 13 23 36 30 0.3 35 0 14 23 36 30 0.3 35 0 15 23 36 30 0.3 35 0 16 23 36 30 0.3 35 0 17 23 36 30 0.3 35 0 18 23 36 30 0.3 35 0 19 23 36 30 0.3 36 0 20 23 36 29 0.3 36 0 21 23 36 29 0.3 36 0 22 22 36 29 0.3 36 0 23 22 36 29 0.3 36 0 24 22 36 29 0.3 36 0 25 22 36 29 0.3 36 0 26 22 36 29 0.3 36 0 27 22 36 29 0.3 36 0 28 22 36 29 0.3 36 0 29 22 36 29 0.3 36 0 30 22 36 29 0.3 36 0 31 22 36 29 0.3 36 0 Month 23 36 30 9.49 1089 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