Upper Colorado River Basin, Average Temperature Rankings, March 2017 1901-2000 Degrees Fahrenheit 1 41.4 32.8 8.6 129 1 1917 2017 2016 2017 highest 2 37.0 29.2 7.8 127 3 1903 2015 2016 2015 top-tenth 3 32.1 26.5 5.6 126 4 1917 2015 2016 2015 top-tenth 1907,1999 4 30.1 25.6 4.5 121 8 1917 2015 2016 2015 top-tenth 1999 5 31.7 26.9 4.8 124 5 1917 1934 2016 2015 top-tenth 2000 6 34.7 30.0 4.7 126 3 1917 1934 2016 2015 top-tenth 7 38.0 33.8 4.2 126 3 1917 1934,2015 2016 2015 top-tenth 2018 8 41.4 37.6 3.8 125 4 1917 1934 2016 2015 top-tenth 9 44.4 40.9 3.5 125 4 1917 2015 2016 2015 top-tenth 10 46.6 42.8 3.8 125 4 1917 1934 2016 2015 top-tenth 11 47.0 43.6 3.4 126 3 1917 2015 2016 2015 top-tenth 1934,2022 12 46.7 43.4 3.3 126 3 1913 2015 2016 2015 top-tenth 2022 18 42.0 38.9 3.1 124 4 1913 2018 2015 2016 top-tenth 24 46.2 43.4 2.8 124 4 1913 2018 2015 2016 top-tenth 36 46.4 43.4 3.0 126 1 1914 2017,2018 2016 2017 highest 2018 48 46.1 43.4 2.7 124 2 1915 2018 2016 2017 top-tenth 2019 60 46.1 43.4 2.7 122 3 1917 2018,2019 2016 2017 top-tenth