Upper Colorado River Basin, Average Temperature Rankings, February 1917 1901-2000 Degrees Fahrenheit 1 22.4 25.6 -3.2 31 99 1903 1995 1914 1916 bottom-third 2 18.1 23.4 -5.3 9 121 1937 2015 1903 1916 bottom-tenth 1974 3 18.4 23.2 -4.8 11 118 1933 1981 1913 1916 bottom-tenth 1899 4 20.9 25.4 -4.5 5 124 1949 1981 1903 1916 bottom-tenth 1903 5 25.4 29.4 -4.0 4 125 1933 1934 1899 1916 bottom-tenth 1973 6 30.2 33.9 -3.7 3 126 1913 1934 1913 1916 bottom-tenth 1899 7 34.7 38.3 -3.6 2 127 1913 1934 1913 1916 bottom-tenth 8 38.6 41.9 -3.3 2 127 1913 1934,2018 1913 1916 bottom-tenth 9 40.8 43.9 -3.1 2 127 1913 2018 1913 1916 bottom-tenth 10 41.5 44.7 -3.2 2 127 1913 2018 1913 1916 bottom-tenth 11 41.6 44.4 -2.8 2 127 1913 2018 1913 1916 bottom-tenth 12 41.0 43.4 -2.4 2 127 1913 2018 1913 1916 bottom-tenth 18 38.4 40.3 -1.9 8 120 1913 2018 1914 1916 bottom-tenth 1904 24 41.8 43.4 -1.6 7 121 1913,1914 2018 1914 1916 bottom-tenth 1904,1933 36 42.1 43.4 -1.3 9 118 1914 2018 1915 1916 bottom-tenth 48 42.2 43.4 -1.2 7 119 1899,1915 2018 1916 1914 bottom-tenth 1918,1933 60 41.7 43.4 -1.7 1 124 1917 2019 1917 1916 lowest