April USHCN National Temperature Values
1900	52.638			
1901	50.467			
1902	52.105			
1903	51.338			
1904	50.497			
1905	51.652			
1906	53.747			
1907	48.568			
1908	53.765			
1909	50.102			
1910	54.68			
1911	51.17			
1912	51.898			
1913	52.648			
1914	52.139			
1915	55.55
1916	51.546
1917	49.899
1918	50.48
1919	52.369
1920	48.165
1921	52.286
1922	51.629
1923	51.052
1924	51.323
1925	55.534
1926	51.164
1927	52.629
1928	49.316
1929	52.31
1930	55.147
1931	52.243
1932	52.558
1933	51.171
1934	54.77
1935	51.013
1936	51.263
1937	51.367
1938	52.929
1939	52.585
1940	51.22
1941	53.459
1942	54.188
1943	53.72
1944	50.486
1945	51.88
1946	55.473
1947	52.332
1948	54.365
1949	53.405
1950	49.952
1951	51.224
1952	53.029
1953	50.386
1954	55.049
1955	54.038
1956	50.63
1957	52.197
1958	51.892
1959	52.883
1960	53.744
1961	50.048
1962	53.033
1963	53.122
1964	52.545
1965	52.972
1966	51.327
1967	52.155
1968	52.174
1969	53.828
1970	50.982
1971	51.515
1972	51.969
1973	50.473
1974	52.926
1975	48.327
1976	53.281
1977	55.206
1978	52.772
1979	51.624
1980	52.986
1981	56.204
1982	50.293
1983	48.871
1984	51.339
1985	55.511
1986	54.266
1987	54.698
1988	53.179
1989	53.966
1990	53.839
1991	54.136
1992	53.566
1993	51.441
1994	54.12
1995	50.962
1996	52.04
1997	49.558
1998	52.561
1999	53.062
2000	54.262