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December Normals for Mount Vernon, TX

< November January > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 39 59 49 0.17 16 -- 2 38 59 49 0.17 16 0 3 38 59 49 0.17 17 0 4 38 59 48 0.16 17 0 5 38 58 48 0.16 17 0 6 37 58 48 0.16 17 0 7 37 58 48 0.16 18 0 8 37 58 47 0.16 18 0 9 37 57 47 0.16 18 0 10 36 57 47 0.16 18 0 11 36 57 47 0.16 18 0 12 36 57 46 0.15 19 0 13 36 57 46 0.15 19 0 14 36 56 46 0.15 19 0 15 35 56 46 0.15 19 0 16 35 56 45 0.15 19 0 17 35 56 45 0.15 20 0 18 35 56 45 0.14 20 0 19 34 55 45 0.14 20 0 20 34 55 45 0.14 20 0 21 34 55 45 0.14 20 0 22 34 55 44 0.14 21 0 23 34 55 44 0.13 21 0 24 34 54 44 0.13 21 0 25 33 54 44 0.13 21 0 26 33 54 44 0.13 21 0 27 33 54 44 0.12 21 0 28 33 54 43 0.12 22 0 29 33 54 43 0.12 22 0 30 33 54 43 0.11 22 0 31 33 53 43 0.11 22 0 Month 35 56 46 4.49 599 1 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