Lewiston, Idaho, Average Temperature Rankings, December 1995 1991-2020 Degrees Fahrenheit 1 35.4 35.2 0.2 65 61 1919 1917 1994 1993 normal 2 40.6 38.4 2.2 112 14 1985 1917 1994 1989 top-third 1904,1989,2002 3 43.8 43.1 0.7 90 34 1985 1950 1994 1991 top-third 1910,1944,1997,2018 4 49.6 48.8 0.8 95 28 1985 1953 1994 1991 top-third 1944,1947,1965,1991,1997 5 53.8 54.1 -0.3 80 43 1985 2012 1993 1994 normal 1899,1949,1957,1976,2016,2017 6 57.3 57.7 -0.4 75 48 1985 2014 1993 1994 normal 1923,1989 7 58.3 58.9 -0.6 60 63 1985 2021 1993 1994 normal 1957,1975,1980 8 58.6 59.1 -0.5 73 50 1916 2021 1993 1994 normal 1952,1953,1965,2002,2008 9 57.7 58.2 -0.5 65 58 1916 2021 1993 1994 normal 1969,2002 10 56.4 57.0 -0.6 67 56 1916 2021 1993 1994 normal 1906,1918,1942,2019 11 55.2 55.4 -0.2 83 40 1916 2015 1993 1994 top-third 1941,1949,1961,1977,1991 12 53.6 53.8 -0.2 89 34 1916 2015 1993 1994 top-third 1961,1974,1997,2005,2022 18 55.2 55.1 0.1 93 27 1916 2015 1994 1992 top-third 1968,1981,2005,2007 24 54.2 53.8 0.4 107 13 1917 2016 1994 1992 top-third 1939,1992 36 53.3 53.8 -0.5 82 36 1913 2016 1993 1994 top-third 1942,1983,1993,2012 48 53.8 53.8 0.0 101 15 1913,1916,1919 2016 1994 1992 top-third 1940,2000,2001,2019 60 53.7 53.8 -0.1 94 20 1913,1916,1920 2016 1993 1994 top-third 1941,1942,2002