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Monitoring Tsunami Impacts Across the Pacific; Air Quality Concerns; Dangerous Heat; Critical Fire Weather for the West

Tsunami impacts continue for portions of the Pacific basin. Wildfire smoke causes unhealthy air in Midwest to Great Lakes. Heat dome spans Mississippi Valley to Mid-Atlantic with excessive heat warnings and advisories. Critical fire weather in Great Basin to Pacific Northwest (dry thunderstorms). Cold front spawns severe storms/heavy rain in Central U.S. today, shifts to East Coast Thursday. 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