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
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