California River Basin, Average Temperature Rankings, October 2022 1901-2000 Degrees Fahrenheit 1 64.1 59.5 4.6 122 7 1916 2020 2021 2020 top-tenth 1933 2 68.9 64.0 4.9 126 3 1916,1920 2020 2021 2020 top-tenth 3 72.0 67.3 4.7 127 2 1900 2020 2021 2020 top-tenth 4 73.4 69.1 4.3 127 2 1912 2020 2021 2020 top-tenth 5 73.1 68.9 4.2 127 2 1912 2020 2021 2020 top-tenth 6 71.3 67.6 3.7 127 2 1916 2020 2021 2020 top-tenth 7 69.1 65.6 3.5 125 4 1912 2020 2019 2021 top-tenth 8 67.1 63.5 3.6 126 3 1912 2014,2015 2021 2015 top-tenth 9 65.0 61.5 3.5 126 3 1912 2015 2021 2015 top-tenth 10 63.2 59.6 3.6 126 3 1911,1912 2015 2021 2015 top-tenth 11 61.4 58.1 3.3 125 3 1912 2015 2021 2015 top-tenth 12 60.8 57.4 3.4 125 3 1912 2015 2021 2015 top-tenth 18 64.3 60.8 3.5 126 2 1912 2015 2021 2015 top-tenth 24 60.5 57.4 3.1 124 3 1912,1949 2015 2021 2016 top-tenth 36 60.5 57.4 3.1 123 3 1913 2016 2021 2016 top-tenth 48 60.0 57.4 2.6 120 5 1912,1913 2017 2021 2018 top-tenth 60 60.1 57.4 2.7 121 3 1913 2018 2021 2018 top-tenth 2016