Average Summer Temperature (in degrees Fahrenheit) - average of Jun-Jul-Aug 1874 73.2 1875 72.6 1876 75.8 1877 74.8 1878 73.0 1879 73.4 1880 74.4 1881 72.9 1882 74.8 1883 74.3 1884 72.6 1885 74.2 1886 73.2 1887 75.4 1888 74.4 1889 73.2 1890 73.9 1891 72.7 1892 75.7 1893 74.9 1894 74.5 1895 75.0 1896 74.8 1897 73.2 1898 75.8 1899 75.5 1900 77.1 1901 76.2 1902 73.0 1903 71.0 1904 73.0 1905 73.7 1906 75.0 1907 72.4 1908 75.0 1909 73.7 1910 73.7 1911 74.9 1912 73.3 1913 75.0 1914 74.0 1915 72.9 1916 73.7 1917 75.1 1918 74.2 1919 74.2 1920 73.7 1921 74.9 1922 74.0 1923 74.9 1924 73.3 1925 76.3 1926 73.0 1927 71.6 1928 74.8 1929 74.3 1930 76.3 1931 76.3 1932 75.9 1933 75.7 1934 76.2 1935 75.0 1936 75.0 1937 75.6 1938 75.6 1939 75.8 1940 72.6 1941 73.5 1942 74.2 1943 76.5 1944 75.3 1945 74.1 1946 71.7 1947 73.6 1948 74.0 1949 76.9 1950 73.3 1951 74.3 1952 76.6 1953 75.5 1954 74.8 1955 76.2 1956 73.3 1957 74.9 1958 72.9 1959 74.9 1960 72.8 1961 73.0 1962 71.9 1963 72.5 1964 73.7 1965 72.4 1966 74.9 1967 74.6 1968 75.3 1969 74.6 1970 75.1 1971 75.6 1972 73.9 1973 77.1 1974 74.6 1975 75.3 1976 75.1 1977 74.2 1978 75.7 1979 73.5 1980 76.3 1981 74.6 1982 73.0 1983 75.6 1984 74.0 1985 72.8 1986 75.3 1987 76.5 1988 77.1 1989 75.5 1990 75.3 1991 77.9 1992 73.9 1993 78.2 1994 78.3 1995 78.5 1996 74.0 1997 74.1 1998 75.7 1999 77.1 2000 73.5