Year,Value,Contiguous U.S. (Lower 48),DewPt,Jun-Aug,(°F)
1940,52.676
1941,54.422
1942,53.277
1943,52.764
1944,52.208
1945,53.001
1946,51.494
1947,52.99
1948,52.844
1949,53.641
1950,51.842
1951,52.419
1952,52.326
1953,52.33
1954,51.53
1955,52.952
1956,50.733
1957,52.939
1958,52.753
1959,54.612
1960,53.422
1961,54.432
1962,53.077
1963,54.231
1964,53.532
1965,53.961
1966,53.492
1967,54.359
1968,54.332
1969,54.543
1970,54.396
1971,54.258
1972,54.104
1973,54.239
1974,52.763
1975,54.657
1976,53.088
1977,55.177
1978,54.143
1979,53.508
1980,54.119
1981,55.543
1982,55.421
1983,56.048
1984,55.713
1985,53.502
1986,55.619
1987,55.29
1988,54.457
1989,54.734
1990,54.856
1991,55.547
1992,54.136
1993,55.041
1994,54.123
1995,55.443
1996,54.929
1997,55.61
1998,56.239
1999,55.817
2000,54.456
2001,55.175
2002,54.859
2003,55.163
2004,53.988
2005,54.851
2006,54.056
2007,54.251
2008,53.132
2009,53.655
2010,55.919
2011,54.39
2012,53.138
2013,54.53
2014,54.047
2015,55.742
2016,54.969
2017,54.828
2018,55.462
2019,54.92
2020,54.0
2021,56.054
2022,55.797
2023,55.416
2024,55.76