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December Normals for Winthrop, WA

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 19 30 25 0.13 40 0 2 19 30 24 0.13 41 0 3 19 30 24 0.14 41 0 4 18 29 24 0.14 41 0 5 18 29 23 0.14 42 0 6 17 29 23 0.14 42 0 7 17 29 23 0.13 42 0 8 17 28 22 0.13 43 0 9 16 28 22 0.13 43 0 10 16 28 22 0.13 43 0 11 16 28 22 0.13 43 0 12 16 27 21 0.13 44 0 13 15 27 21 0.13 44 0 14 15 27 21 0.13 44 0 15 15 27 21 0.13 44 0 16 15 27 21 0.13 44 0 17 14 27 21 0.13 44 0 18 14 27 20 0.13 45 0 19 14 27 20 0.13 45 0 20 14 27 20 0.13 45 0 21 14 26 20 0.13 45 0 22 14 26 20 0.13 45 0 23 14 26 20 0.13 45 0 24 14 26 20 0.13 45 0 25 13 26 20 0.13 45 0 26 13 26 20 0.13 45 0 27 13 26 20 0.13 45 0 28 13 26 20 0.13 45 0 29 13 26 20 0.13 45 0 30 13 26 20 0.13 45 0 31 13 27 20 0.13 45 0 Month 15 27 21 4.07 1355 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