Year,Depart From 1991-2020 Average,Contiguous U.S. (Lower 48),Clouds,Jan-Mar,(%)
1940,5.14
1941,1.19
1942,-0.49
1943,-2.924
1944,0.727
1945,1.367
1946,-1.94
1947,-2.726
1948,-0.282
1949,4.613
1950,2.304
1951,0.244
1952,2.055
1953,-1.582
1954,-3.291
1955,-1.082
1956,-2.502
1957,5.195
1958,5.729
1959,-1.286
1960,3.544
1961,-0.207
1962,-0.86
1963,-4.103
1964,-7.077
1965,-2.69
1966,-0.458
1967,-1.799
1968,-1.966
1969,4.177
1970,0.491
1971,-3.051
1972,-2.963
1973,3.54
1974,-0.361
1975,2.075
1976,-4.563
1977,-3.971
1978,4.878
1979,5.614
1980,6.469
1981,-2.996
1982,3.936
1983,7.329
1984,-2.185
1985,-0.722
1986,-0.367
1987,2.501
1988,-4.917
1989,-0.394
1990,-1.479
1991,-0.061
1992,0.848
1993,5.059
1994,-0.214
1995,1.661
1996,-1.278
1997,2.686
1998,5.499
1999,-2.335
2000,-1.913
2001,1.732
2002,-2.541
2003,-0.35
2004,0.889
2005,2.122
2006,-1.213
2007,-2.281
2008,-2.63
2009,-6.396
2010,2.274
2011,-1.431
2012,-4.949
2013,-2.224
2014,-2.096
2015,-1.567
2016,-1.06
2017,2.924
2018,0.818
2019,5.687
2020,2.337
2021,-1.935
2022,-7.658
2023,2.049
2024,-0.167
2025,-5.942