NATIONAL WEATHER SERVICE - DENVER, COLORADO MONTHLY TEMPERATURE, RAINFALL, AND SNOWFALL EXTREMES FOR DECEMBER 20 WARMEST DECS 20 WETTEST DECS 20 SNOWIEST DECS (1872-2019) (1872-2019) (1882-2019) 1 43.8 1933 1 5.21 1913 1 57.4 1913 2 41.2 1980 2 2.84 1973 2 30.8 1973 3 40.9 1939 3 2.34 1982 3 29.4 2006 4 40.5 1889 4 2.32 1883 4 27.1 1982 5 39.7 1906 5 1.70 1876 5 21.5 1987 6 39.6 1946 6 1.56 1891 6 20.9 2007 7 39.5 1957 7 1.50 1960 7 19.6 1918 39.5 1881 8 1.42 1924 8 18.4 1924 9 39.2 1890 9 1.40 1918 9 17.8 1960 10 38.8 1896 10 1.32 1892 10 17.5 1891 38.8 1875 11 1.30 1987 11 16.5 2011 12 38.2 1893 12 1.21 2006 16.5 1979 13 38.0 1917 13 1.08 1885 13 16.3 1916 14 37.5 1975 14 1.06 1979 14 16.2 1892 15 37.3 1888 1.06 1967 15 15.5 1898 16 37.1 1929 16 1.05 1878 16 15.3 1923 17 37.0 1942 17 1.04 1988 17 14.8 1926 18 36.5 1959 18 1.03 1941 18 14.4 1953 36.5 1936 19 1.02 1953 19 14.2 1978 36.5 1885 1.02 1916 20 13.3 1925 20 COLDEST DECS 20 DRIEST DECS LEAST SNOWIEST DECS (1872-2019) (1872-2019) (1882-2019) 1 17.4 1983 1 0.00 1881 1 T 1906 2 21.2 1909 2 T 1905 T 1905 3 22.1 1878 3 0.01 1906 T 2002 4 22.7 1873 0.01 1895 4 0.1 1928 5 23.1 1913 5 0.03 2018 5 0.4 1890 6 23.7 1932 0.03 1977 6 0.5 2018 7 24.1 2009 0.03 1931 0.5 1938 8 24.3 1914 8 0.04 2004 8 0.6 1995 9 24.6 1978 0.04 1890 9 0.7 1977 10 24.8 1884 10 0.05 2002 0.7 1895 11 24.9 1972 0.05 1995 11 0.8 1957 12 25.4 1992 12 0.06 1996 0.8 1931 13 25.5 1924 0.06 1957 0.8 1888 14 25.7 1990 0.06 1928 14 0.9 1970 15 25.8 1898 15 0.09 1970 1.2 1980 16 25.9 1927 0.09 1946 1.2 1962 17 26.5 1967 0.09 1888 1.2 1945 26.5 1960 18 0.10 1980 18 1.7 2005 26.5 1916 0.10 1945 19 1.8 1887 20 26.6 2011 0.10 1880 20 1.9 1991 26.6 2008 1.9 1966 - Temperatures in degrees Fahrenheit. - Precipitation and Snowfall amounts in inches. - Average December Temperature is 30.0 degrees (from 1981-2010 DIA data). - Average December Precipitation is 0.35 inches (from 1981-2010 DIA data). - Average December Snowfall is 8.5 inches (from 1981-2010 DEN data). # Snowiest Month in Denver History. * Driest Month in Denver History. ** Although 1881 is before snow records began, if there was zero liquid precipitation, then there could not have been any snowfall. Therefore, 1881 must also be December's least snowiest month with zero snowfall. - Data collected at the Downtown City Office from 1872-December 1949, then at the Stapleton Airport Office from January 1950-February 1995, then at Denver International Airport from March 1995-Present. UPDATED 1/2/2020