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List of 100 Degree Days and Streaks at Denver (1872-Present)
(100 Degree occurrences since 1872 = 112)
105 Degrees Highest Temperature recorded in Denver
(June 28, 2018, June 26, 2012, June 25, 2012, July 20, 2005 and August 8th, 1878)
Greatest Number of 100 Degree Days by Year
| Rank | Year | Number |
| 1 | 2012 | 13 |
| 2 | 2005 | 7 |
| 3 | 2024 | 6 |
| 4 | 2022 | 5 |
| - | 2021 | 5 |
| - | 1990 | 5 |
| - | 1989 | 5 |
| 8 | 2006 | 4 |
| - | 1878 | 4 |
| 10 | 2008 | 3 |
| - | 2007 | 3 |
| - | 2003 | 3 |
| - | 1954 | 3 |
| 14 | 2020 | 2 |
| - | 2019 | 2 |
| - | 2018 | 2 |
| - | 2017 | 2 |
| - | 2013 | 2 |
| - | 1973 | 2 |
| - | 1971 | 2 |
| - | 1962 | 2 |
| - | 1910 | 2 |
| - | 1902 | 2 |
| - | 1876 | 2 |
| - | 1874 | 2 |
Overall, it has been fairly rare to have 2 consecutive days of 100 degrees or more. In fact, there have only been 15 occurrences since 1872.
Consecutive 100 Degree Days since 1872
| Rank | Number | Start Date | End Date |
| 1 | 5 | 6/22/2012 | 6/26/2012 |
| - | 5 | 7/19/2005 | 7/23/2005 |
| - | 5 | 7/4/1989 | 7/8/1989 |
| 4 | 4 | 6/29/1990 | 7/2/1990 |
| 5 | 3 | 6/15/2021 | 6/17/2021 |
| - | 3 | 7/19/2012 | 7/21/2012 |
| 7 | 2 | 7/9/2022 | 7/10/2022 |
| - | 2 | 6/27/2018 | 6/28/2018 |
| - | 2 | 7/1/2012 | 7/2/2012 |
| - | 2 | 8/1/2008 | 8/2/2008 |
| - | 2 | 7/15/2006 | 7/16/2006 |
| - | 2 | 7/5/1973 | 7/6/1973 |
| - | 2 | 7/11/1954 | 7/12/1954 |
| - | 2 | 8/2/1878 | 8/3/1878 |
| - | 2 | 7/3/1874 | 7/4/1874 |
List of 100 Degree Occurrences since 1872
(Earliest occurrence on 6/11/2022 and 6/11/2013, latest occurrence was 9/5/2020)
| Date | Date | Date | |||
| 7/9/2025 | 100 | ||||
| 8/4/2024 | 102 | 6/23/2012 | 104 | 7/7/1989 | 102 |
| 8/2/2024 | 101 | 6/22/2012 | 102 | 7/6/1989 | 102 |
| 7/30/2024 | 100 | 6/18/2012 | 100 | 7/5/1989 | 101 |
| 7/14/2024 | 101 | 7/17/2010 | 102 | 7/4/1989 | 101 |
| 7/12/2024 | 102 | 8/2/2008 | 103 | 7/21/1981 | 100 |
| 6/25/2024 | 100 | 8/1/2008 | 104 | 8/6/1980 | 100 |
| 8/5/2022 | 101 | 7/20/2008 | 100 | 7/6/1973 | 103 |
| 7/18/2022 | 100 | 7/17/2007 | 100 | 7/5/1973 | 100 |
| 7/10/2022 | 101 | 7/2/2007 | 100 | 7/30/1972 | 100 |
| 7/9/2022 | 100 | 6/24/2007 | 100 | 7/17/1971 | 101 |
| 6/11/2022 | 100 | 7/19/2006 | 100 | 7/12/1971 | 101 |
| 7/28/2021 | 100 | 7/16/2006 | 103 | 8/8/1969 | 100 |
| 7/8/2021 | 102 | 7/15/2006 | 101 | 8/14/1962 | 100 |
| 6/17/2021 | 100 | 6/14/2006 | 102 | 8/10/1962 | 100 |
| 6/16/2021 | 100 | 7/30/2005 | 101 | 7/12/1954 | 101 |
| 6/15/2021 | 101 | 7/23/2005 | 102 | 7/11/1954 | 102 |
| 9/5/2020 | 101 | 7/22/2005 | 102 | 6/23/1954 | 102 |
| 8/18/2020 | 100 | 7/21/2005 | 104 | 7/20/1939 | 102 |
| 9/2/2019 | 100 | 7/20/2005 | 105 | 8/1/1938 | 100 |
| 7/19/2019 | 101 | 7/19/2005 | 101 | 7/23/1936 | 100 |
| 6/28/2018 | 105 | 7/16/2005 | 102 | 7/19/1934 | 100 |
| 6/27/2018 | 101 | 7/24/2003 | 100 | 7/22/1931 | 100 |
| 7/19/2017 | 100 | 7/16/2003 | 101 | 7/26/1910 | 100 |
| 7/6/2017 | 100 | 7/13/2003 | 100 | 7/23/1910 | 101 |
| 7/10/2016 | 102 | 8/16/2002 | 100 | 8/1/1902 | 100 |
| 7/7/2014 | 100 | 7/1/2001 | 101 | 7/15/1902 | 100 |
| 7/11/2013 | 100 | 7/6/2000 | 101 | 8/1/1901 | 100 |
| 6/11/2013 | 100 | 7/20/1998 | 100 | 7/31/1889 | 100 |
| 7/23/2012 | 100 | 6/26/1994 | 104 | 7/11/1888 | 100 |
| 7/21/2012 | 102 | 6/25/1991 | 100 | 8/8/1878 | 105 |
| 7/20/2012 | 101 | 7/2/1990 | 100 | 8/3/1878 | 100 |
| 7/19/2012 | 100 | 7/1/1990 | 102 | 8/2/1878 | 100 |
| 7/15/2012 | 100 | 6/30/1990 | 102 | 7/14/1878 | 100 |
| 7/2/2012 | 101 | 7/1/1990 | 102 | 8/12/1876 | 100 |
| 7/1/2012 | 101 | 6/30/1990 | 102 | 7/6/1876 | 101 |
| 6/26/2012 | 105 | 6/29/1990 | 102 | 7/4/1874 | 102 |
| 6/25/2012 | 105 | 6/27/1990 | 102 | 7/3/1874 | 101 |
| 6/24/2012 | 102 | 7/8/1989 | 103 |
Denver's Top 20 Seasonal 90 Degree Days (1872-Present)
| Rank | Year | Number |
| 1 | 2020 | 75 |
| 2 | 2012 | 73 |
| 3 | 2024 | 64 |
| - | 2022 | 64 |
| - | 2000 | 61 |
| 6 | 1994 | 60 |
| 7 | 2021 | 59 |
| - | 2018 | 59 |
| 9 | 2002 | 56 |
| 10 | 2016 | 55 |
| 2005 | 55 | |
| 12 | 2013 | 54 |
| 2007 | 54 | |
| 2006 | 54 | |
| 15 | 1978 | 52 |
| 16 | 2011 | 50 |
| 1964 | 50 | |
| 1960 | 50 | |
| 1874 | 50 | |
| 20 | 2010 | 49 |
| 1980 | 49 |
Denver's Consecutive 90 Degree Day Streaks (1872-Present)
| Rank | Number | Start Date | End Date |
| 1 | 24 | 7/11/2012 | 8/3/2012 |
| - | 24 | 7/13/2008 | 8/5/2008 |
| 3 | 18 | 7/15/2011 | 8/1/2011 |
| - | 18 | 7/6/1901 | 7/23/1901 |
| - | 18 | 7/1/1874 | 7/18/1874 |
| 6 | 17 | 8/11/2020 | 8/27/2020 |
| - | 17 | 6/29/2000 | 7/15/2000 |
| 8 | 16 | 7/18/1987 | 8/2/1987 |
| 9 | 15 | 7/24/2024 | 8/7/2024 |
| - | 15 | 6/22/2012 | 7/6/2012 |
| - | 15 | 7/7/1934 | 7/21/1934 |
| 12 | 13 | 6/21/2002 | 7/3/2002 |
| - | 13 | 7/10/1878 | 7/22/1878 |
| 14 | 12 | 7/12/2022 | 7/23/2022 |
| - | 12 | 7/2/2020 | 7/13/2020 |
| - | 12 | 7/16/2016 | 7/27/2016 |
| - | 12 | 7/5/2005 | 7/16/2005 |
| - | 12 | 7/10/2003 | 7/21/2003 |
| - | 12 | 7/31/2000 | 8/11/2000 |
| - | 12 | 6/30/1989 | 7/11/1989 |
| - | 12 | 7/2/1966 | 7/13/1966 |
| - | 12 | 7/14/1963 | 7/25/1963 |
| 23 | 11 | 6/29/2007 | 7/9/2007 |
| - | 11 | 6/28/2001 | 7/8/2001 |
| - | 11 | 6/23/1990 | 7/3/1990 |
| - | 11 | 6/20/1900 | 6/30/1900 |
| - | 11 | 7/29/1878 | 8/8/1878 |
Denver's Warmest Summers
(June through August)
| Rank | Year | Mean Temp |
| 1 | 2012 | 76.3 |
| 2 | 2024 | 75.0 |
| 3 | 2020 | 74.9 |
| 4 | 2022 | 74.8 |
| 5 | 2021 | 74.6 |
| 6 | 1994 | 74.1 |
| - | 1934 | 74.1 |
| 8 | 1936 | 74.0 |
| 9 | 2006 | 73.9 |
| 10 | 1980 | 73.8 |
| 11 | 2011 | 73.7 |
| - | 1881 | 73.7 |
| 13 | 2007 | 73.5 |
| 14 | 2018 | 73.4 |
| 15 | 2013 | 73.3 |
| 16 | 2001 | 73.2 |
| - | 1988 | 73.2 |
| - | 1931 | 73.2 |
| 19 | 1874 | 73.1 |
| 20 | 2002 | 72.9 |
| - | 1954 | 72.9 |
| - | 1933 | 72.9 |
Denver's Coolest Summers
(June through August)
| Rank | Year | Mean Temp |
| 1 | 1915 | 65.8 |
| 2 | 1967 | 66.0 |
| 3 | 1895 | 66.4 |
| 4 | 1904 | 66.7 |
| 5 | 1891 | 67.2 |
| 6 | 1906 | 67.4 |
| 7 | 1928 | 67.5 |
| - | 1927 | 67.5 |
| - | 1912 | 67.5 |
| 10 | 2004 | 67.6 |
| 11 | 1908 | 67.7 |
| 12 | 1950 | 68.1 |
| 13 | 1897 | 68.2 |
| 14 | 2009 | 68.3 |
| - | 1992 | 68.3 |
| - | 1951 | 68.3 |
| 17 | 1920 | 68.5 |
| 18 | 1885 | 68.5 |
| 19 | 1872 | 68.5 |
| 20 | 1883 | 68.7 |