Year,Value,ValueRank 1940,8.227,34 1941,7.32,53 1942,9.82,25 1943,7.708,45 1944,10.22,19 1945,6.519,70 1946,8.144,36 1947,6.673,67 1948,5.83,76 1949,7.72,44 1950,7.512,48 1951,5.538,81 1952,10.643,15 1953,10.15,20 1954,10.583,16 1955,9.835,23 1956,5.013,86 1957,7.369,51 1958,6.07,73 1959,9.033,29 1960,10.305,18 1961,7.74,42 1962,5.949,75 1963,5.368,84 1964,7.414,50 1965,5.411,83 1966,7.725,43 1967,5.777,77 1968,5.358,85 1969,6.954,60 1970,7.798,41 1971,6.713,66 1972,5.567,79 1973,7.306,54 1974,6.87,62 1975,7.612,46 1976,7.065,58 1977,7.435,49 1978,7.221,55 1979,6.825,63 1980,9.116,27 1981,8.304,33 1982,5.971,74 1983,9.057,28 1984,6.569,69 1985,7.365,52 1986,7.582,47 1987,12.384,11 1988,10.013,22 1989,6.626,68 1990,6.903,61 1991,7.809,40 1992,6.805,64 1993,6.772,65 1994,7.132,57 1995,7.901,39 1996,5.456,82 1997,6.129,72 1998,13.153,7 1999,10.814,14 2000,10.389,17 2001,8.164,35 2002,9.821,24 2003,6.416,71 2004,8.557,32 2005,11.0,13 2006,12.865,9 2007,8.74,30 2008,15.232,4 2009,14.179,6 2010,18.756,2 2011,16.127,3 2012,21.432,1 2013,14.474,5 2014,5.621,78 2015,7.939,38 2016,11.853,12 2017,7.988,37 2018,7.046,59 2019,7.143,56 2020,10.147,21 2021,13.043,8 2022,5.554,80 2023,8.702,31 2024,12.759,10 2025,9.144,26 Variable: SST Domain: Lake Superior Month(s): Jul Average of all values: 8.643 Normal Period: 1991 to 2020 Normal Value = 10.195 Degrees C Trend Begin Value = 6.66 Degrees C Trend End Value = 10.626 Degrees C Total Trend (Change) = 3.965 Degrees C Total Trend (Change) per Decade = 0.461 Degrees C Trend Statistical Sig. (M-K Test): Increasing Trend P-value (M-K Test): 0.0034