Year,Value,Indiana (State),Temp,Jan,(°F) 1940,14.002 1941,28.241 1942,25.323 1943,26.326 1944,31.848 1945,21.8 1946,28.939 1947,31.763 1948,21.438 1949,33.669 1950,36.475 1951,30.277 1952,33.03 1953,33.061 1954,30.823 1955,28.274 1956,27.483 1957,23.805 1958,27.745 1959,24.863 1960,31.382 1961,24.239 1962,22.868 1963,18.693 1964,31.097 1965,28.704 1966,22.45 1967,32.02 1968,24.452 1969,25.444 1970,19.648 1971,24.124 1972,26.435 1973,30.214 1974,30.057 1975,32.804 1976,24.421 1977,12.157 1978,18.629 1979,18.473 1980,28.92 1981,24.773 1982,20.115 1983,30.776 1984,23.187 1985,21.57 1986,29.104 1987,27.874 1988,25.836 1989,36.137 1990,37.373 1991,27.301 1992,31.178 1993,30.931 1994,21.824 1995,29.224 1996,26.361 1997,24.006 1998,35.881 1999,28.004 2000,27.837 2001,27.93 2002,35.216 2003,23.334 2004,25.56 2005,30.787 2006,39.667 2007,33.103 2008,29.174 2009,22.752 2010,25.081 2011,24.955 2012,33.31 2013,31.367 2014,20.628 2015,26.674 2016,28.865 2017,34.759 2018,26.319 2019,27.768 2020,35.132 2021,31.842 2022,25.923 2023,37.137 2024,29.346 2025,24.385