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Areas of Showers and Thunderstorms to Start the Work Week

Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >

              National Weather Service - Denver, Colorado
               Temperature Normals & Extreme for December

     |Normal|Record| Year |Record| Year ||Normal|Record| Year |Record| Year |
DATE | High | High |  Set |Warmest Set  ||  Low |  Low |  Set |Coldest  Set |
     |      |      |      |Minimum      ||      |      |      |Maximum      |
-----|------|------|------|------|------||------|------|------|------|------|
  1  |  45  |  73  | 1973 |  43  | 1972 ||  19  | - 6  | 1985 |   7  | 1985 |
  2  |  45  |  74  | 1885 |  41  | 1926 ||  18  | - 4  | 1929^|   9  | 1919 |
  3  |  45  |  69^ | 2010 |  49  | 1941 ||  18  | - 3  | 1873 |  12  | 1873 |
  4  |  44  |  72  | 2007 |  45  | 1946 ||  18  | -13  | 2013 |   7  | 1909 |
  5  |  44  |  79# | 1939 |  42  | 1946 ||  18  | -15  | 2013^|   6  | 1972 | 

  6  |  44  |  73  | 1939 |  44  | 1939^||  18  | -17  | 1972 |   3  | 1972 |
  7  |  43  |  70  | 1906 |  39  | 1893^||  17  | -13  | 2005 |   3  | 2005 |
  8  |  43  |  73  | 1940 |  41  | 1874 ||  17  | -14  | 1919 |   4  | 1932^|
  9  |  43  |  71  | 1957 |  42  | 1996 ||  17  | -20  | 1919^| - 5  | 1932 |
 10  |  43  |  70  | 1939 |  46  | 1933 ||  17  | -18  | 1972 | - 1  | 1932 | 

 11  |  43  |  74  | 1939 |  44  | 1933 ||  17  | -13  | 1932 | - 6  | 1932 |
 12  |  42  |  69  | 2017^|  47  | 1921 ||  17  | -12  | 1961 |  16  | 1961^|
 13  |  42  |  72  | 1921 |  47  | 1921 ||  17  | -12  | 1961 |   6  | 1940 |
 14  |  42  |  70  | 2010 |  41  | 1946^||  17  | -18  | 2008 | - 1  | 1926 |
 15  |  42  |  68  | 1921 |  44  | 1924 ||  17  | -19  | 2008 |   2  | 2008 | 

 16  |  42  |  70  | 1980 |  49  | 1939 ||  17  | - 8  | 2008^|   9  | 1897 |
 17  |  42  |  73  | 1980 |  43  | 1939 ||  17  | -15  | 2016 |   3  | 2016 |
 18  |  42  |  68  | 2013 |  40  | 1917 ||  17  | -12  | 1909 |   5  | 1924 |
 19  |  42  |  67  | 1917 |  43  | 1917 ||  17  | -10  | 1989 |   7  | 1998 |
 20  |  42  |  69  | 1894 |  43  | 1933 ||  17  | -16  | 1990^| - 3  | 1990 |

 21  |  42  |  67  | 1933 |  43  | 1933 ||  17  | -21  | 1990^| - 8  | 1983 |
 22  |  42  |  70  | 1955 |  41  | 2005^||  17  | -25* | 1990 | - 5  | 1983 |
 23  |  42  |  74  | 1901 |  50  | 1955^||  17  | -17  | 1990 | - 5  | 1983 |
 24  |  42  |  70  | 1955 |  44  | 1922 ||  17  | -25* | 1876 | - 4  | 1983 |
 25  |  42  |  69  | 2005 |  45  | 1899 ||  17  | -15  | 1876 |  10  | 1876 |

 26  |  42  |  68  | 1980 |  39  | 1890 ||  17  | - 5  | 1982^|   6  | 1916 |
 27  |  43  |  75  | 1980 |  41  | 1980 ||  17  | -10  | 1904 |   9  | 1894 |
 28  |  43  |  65  | 1886 |  39  | 1936 ||  17  | -12  | 1983 |   5  | 1880 |
 29  |  43  |  68  | 1919 |  44  | 1919 ||  17  | -15  | 1983 |  11  | 1880 |
 30  |  43  |  71  | 1980 |  37  | 1919 ||  17  | -19  | 2014 |   1  | 2014 |
 31  |  43  |  66  | 2005 |  45  | 1881 ||  17  | -19  | 1900 | - 3  | 1927 |

The Normal High and Low Temperatures are calculated from 1981-2010 data.
             The Temperature Extremes range from 1872-2019.

^ - Also in previous years.

# - Highest Temperature of the Month:  79 degrees on 12/5/1939.

* - Lowest Temperature of the Month:  -25 on 12/24/1876 & 12/22/1990.

- The December Mean Temperature is 30.0 degrees (from 1981-2010 DIA data).

- 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