YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC D-J-F M-A-M J-J-A S-O-N metANN 1895 23.9 24.5 23.4 15.5 13.2 11.5 11.2 13.4 13.1 19.8 23.0 25.0 23.8 17.4 12.0 18.6 17.95 1896 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.90 1897 26.5 23.4 21.7 19.2 14.3 12.4 11.2 10.9 14.9 16.7 22.3 24.2 24.5 18.4 11.5 18.0 18.09 1898 27.8 25.3 23.4 17.6 13.9 9.8 10.9 12.3 14.9 16.4 21.0 24.8 25.8 18.3 11.0 17.4 18.13 1899 24.4 26.7 22.7 17.7 12.7 11.2 10.5 11.5 14.4 17.8 21.0 25.8 25.3 17.7 11.1 17.7 17.95 1900 23.6 27.2 20.3 16.3 12.6 12.3 9.6 10.9 12.7 19.0 23.0 24.7 25.5 16.4 10.9 18.2 17.78 1901 27.5 23.8 22.0 19.8 14.6 11.1 9.8 12.0 14.4 18.8 23.4 25.4 25.3 18.8 11.0 18.9 18.49 1902 24.8 23.6 24.9 20.7 14.7 10.5 9.4 12.4 14.7 17.3 21.4 23.5 24.6 20.1 10.8 17.8 18.32 1903 27.9 24.8 21.3 16.4 14.2 12.1 10.0 11.9 13.7 16.6 21.0 22.7 25.4 17.3 11.3 17.1 17.78 1904 25.4 24.4 22.3 19.8 12.7 11.4 9.6 11.8 14.4 15.9 22.1 25.4 24.2 18.3 10.9 17.5 17.71 1905 25.6 23.8 21.3 17.5 14.4 9.3 9.7 10.4 14.2 17.4 22.0 26.8 24.9 17.7 9.8 17.9 17.58 1906 27.9 26.5 23.4 20.2 15.2 12.0 10.0 11.2 12.8 18.0 20.4 25.9 27.1 19.6 11.1 17.1 18.70 1907 24.5 26.8 21.3 18.1 13.8 11.6 11.1 12.7 15.0 17.4 19.5 23.4 25.7 17.7 11.8 17.3 18.14 1908 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.90 1909 23.3 24.7 22.6 16.7 13.3 11.2 9.0 11.5 14.7 16.8 21.1 25.7 23.6 17.5 10.6 17.5 17.30 1910 27.1 25.1 22.9 20.3 14.1 10.9 9.9 11.8 14.9 14.6 20.8 23.5 26.0 19.1 10.9 16.8 18.18 1911 27.3 24.6 21.7 18.8 12.9 10.0 10.7 11.4 13.9 18.0 24.1 24.2 25.1 17.8 10.7 18.7 18.08 1912 27.2 28.6 25.2 19.1 15.5 10.9 10.9 12.4 13.8 17.6 20.8 26.6 26.7 19.9 11.4 17.4 18.85 1913 25.1 26.1 21.8 19.5 14.0 12.2 10.9 12.3 14.9 17.3 22.6 23.8 25.9 18.4 11.8 18.3 18.61 1914 26.9 25.8 23.3 17.5 13.9 11.5 10.2 13.3 16.6 20.8 21.2 25.3 25.5 18.2 11.7 19.5 18.73 1915 25.3 25.0 21.7 19.1 14.9 13.9 11.5 12.2 13.0 17.7 22.8 25.5 25.2 18.6 12.5 17.8 18.53 1916 25.1 26.2 23.8 17.2 15.3 10.4 8.9 11.0 16.0 15.9 20.9 23.4 25.6 18.8 10.1 17.6 18.02 1917 25.1 23.4 20.9 17.3 12.1 10.8 10.3 10.0 12.1 15.0 20.0 22.3 24.0 16.8 10.4 15.7 16.70 1918 26.0 24.3 21.1 19.6 13.6 12.0 10.2 11.1 16.1 17.1 23.3 24.8 24.2 18.1 11.1 18.8 18.06 1919 26.5 25.9 24.7 18.0 13.1 11.9 12.7 11.7 12.5 16.1 21.2 23.9 25.7 18.6 12.1 16.6 18.26 1920 26.3 24.2 22.1 17.2 13.5 11.4 9.1 10.4 14.4 18.5 22.7 24.4 24.8 17.6 10.3 18.5 17.81 1921 26.7 29.0 24.6 18.6 15.8 12.1 11.6 11.9 14.0 17.2 20.1 24.2 26.7 19.7 11.9 17.1 18.83 1922 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.90 1923 25.6 27.8 24.7 19.6 14.5 11.0 9.8 11.4 13.2 17.4 23.4 24.1 26.3 19.6 10.7 18.0 18.65 1924 25.0 24.6 20.8 20.3 15.0 11.9 10.8 10.9 13.9 15.1 20.4 24.3 24.6 18.7 11.2 16.5 17.73 1925 23.1 23.0 22.9 19.0 14.0 10.4 8.7 10.4 13.0 14.6 23.3 25.4 23.5 18.6 9.8 17.0 17.23 1926 27.3 24.8 21.0 17.3 13.0 10.6 10.8 10.0 14.5 17.5 21.9 22.8 25.8 17.1 10.5 18.0 17.84 1927 24.4 24.3 20.8 19.3 12.7 10.4 9.2 11.4 14.2 17.5 22.6 25.0 23.8 17.6 10.3 18.1 17.47 1928 24.3 24.0 22.3 19.0 13.7 11.6 9.8 11.6 13.9 15.6 22.7 24.5 24.4 18.3 11.0 17.4 17.79 1929 24.2 25.5 20.6 18.1 13.5 10.6 9.1 10.8 13.9 17.4 20.1 24.1 24.7 17.4 10.2 17.1 17.36 1930 26.7 26.6 24.5 17.9 15.4 13.5 10.0 11.5 14.7 17.1 21.4 23.8 25.8 19.3 11.7 17.7 18.62 1931 25.5 23.5 22.5 17.9 11.9 8.8 11.2 11.2 12.9 17.0 19.0 25.7 24.3 17.4 10.4 16.3 17.10 1932 28.0 25.6 22.1 18.2 15.4 11.3 11.7 9.5 13.7 15.7 21.0 23.9 26.4 18.6 10.8 16.8 18.16 1933 24.5 27.9 23.1 18.6 13.4 12.3 9.7 10.7 14.5 16.9 20.5 24.6 25.4 18.4 10.9 17.3 18.00 1934 28.1 28.1 23.4 16.7 17.3 11.1 9.8 11.8 13.8 16.3 18.7 23.6 26.9 19.1 10.9 16.3 18.31 1935 25.1 24.1 21.6 17.5 15.1 10.8 10.3 10.9 13.0 16.2 21.8 23.6 24.3 18.1 10.7 17.0 17.50 1936 25.5 25.4 25.1 19.0 13.6 10.8 9.9 12.4 15.7 17.6 23.5 25.3 24.8 19.2 11.0 18.9 18.51 1937 25.2 25.9 23.3 19.8 14.6 10.8 9.8 10.6 14.5 19.2 21.5 23.7 25.5 19.2 10.4 18.4 18.38 1938 24.5 24.8 23.2 20.0 14.4 10.7 10.9 11.9 16.1 18.3 23.2 26.1 24.3 19.2 11.2 19.2 18.48 1939 25.6 25.7 23.0 19.3 14.5 10.9 9.9 10.9 15.1 17.7 19.6 25.0 25.8 18.9 10.6 17.5 18.19 1940 25.2 26.7 25.2 17.5 13.7 13.1 10.9 13.0 15.5 18.8 20.9 23.8 25.6 18.8 12.3 18.4 18.79 1941 25.7 25.7 22.0 18.7 14.6 12.5 11.5 13.4 13.3 16.6 22.0 25.7 25.1 18.4 12.5 17.3 18.32 1942 25.1 23.9 22.0 18.3 14.8 10.5 9.5 12.3 14.2 16.5 22.9 24.2 24.9 18.4 10.8 17.9 17.98 1943 25.0 23.4 22.7 17.0 13.5 11.4 8.6 10.7 12.9 17.2 21.0 23.7 24.2 17.7 10.2 17.0 17.30 1944 27.0 25.8 22.6 17.3 12.1 11.3 11.0 11.9 14.6 19.1 22.8 22.0 25.5 17.3 11.4 18.8 18.27 1945 25.3 25.2 22.8 21.9 15.2 12.8 9.7 11.6 12.9 17.3 21.4 24.5 24.2 20.0 11.4 17.2 18.18 1946 25.1 22.6 21.0 19.1 14.1 10.2 11.0 10.6 15.9 19.1 19.4 24.7 24.1 18.1 10.6 18.1 17.72 1947 25.8 25.7 22.5 17.8 13.6 12.7 10.4 11.2 13.7 16.0 20.5 23.9 25.4 18.0 11.4 16.7 17.88 1948 27.1 25.6 24.0 16.8 14.2 11.0 10.4 12.9 15.4 18.7 20.1 23.2 25.5 18.3 11.4 18.1 18.34 1949 25.7 24.0 21.6 19.8 13.6 12.1 12.2 13.0 14.1 16.1 20.4 25.8 24.3 18.3 12.4 16.9 17.98 1950 26.7 25.2 24.1 20.9 15.2 10.4 10.1 11.9 14.4 16.6 20.0 24.5 25.9 20.1 10.8 17.0 18.44 1951 25.8 25.4 24.0 17.8 12.7 11.8 9.3 9.5 15.4 18.1 22.0 23.6 25.2 18.2 10.2 18.5 18.03 1952 26.0 24.6 22.4 17.8 12.8 12.3 8.8 11.8 14.1 16.5 20.7 21.4 24.7 17.7 11.0 17.1 17.62 1953 26.5 25.1 25.2 19.0 13.9 10.8 9.3 10.3 14.0 17.1 19.8 23.9 24.3 19.4 10.1 17.0 17.70 1954 27.1 25.4 24.2 16.7 12.9 9.9 10.7 10.9 14.7 18.7 21.0 25.0 25.5 17.9 10.5 18.1 18.01 1955 26.1 27.2 23.7 17.5 12.8 9.3 9.3 11.5 14.1 15.2 20.6 22.9 26.1 18.0 10.0 16.6 17.69 1956 28.1 27.9 24.1 16.8 13.2 9.5 10.1 9.4 14.0 16.5 20.8 24.3 26.3 18.0 9.7 17.1 17.78 1957 27.4 24.6 23.2 19.1 14.5 13.2 8.4 11.7 14.5 19.3 23.8 26.1 25.4 18.9 11.1 19.2 18.67 1958 28.0 26.2 23.6 19.9 15.3 11.5 9.8 10.7 12.7 16.3 20.5 25.6 26.8 19.6 10.7 16.5 18.38 1959 999.9 25.4 24.8 19.6 16.3 12.9 11.6 12.4 14.8 18.0 21.5 21.7 25.8 20.2 12.3 18.1 19.12 1960 24.7 24.8 999.9 16.4 12.0 10.5 9.9 11.1 13.3 18.7 20.9 24.7 23.7 16.4 10.5 17.6 17.07 1961 27.7 26.1 25.0 17.6 15.1 11.6 10.1 11.8 16.4 19.4 21.9 24.9 26.2 19.2 11.2 19.2 18.95 1962 27.7 26.2 22.2 20.2 15.2 13.4 10.3 12.0 14.2 16.3 22.0 25.2 26.3 19.2 11.9 17.5 18.72 1963 25.1 25.0 23.2 18.2 14.7 11.2 10.8 11.2 14.6 19.0 21.4 24.3 25.1 18.7 11.1 18.3 18.30 1964 25.9 24.7 23.8 17.1 13.8 13.7 11.5 11.9 13.2 14.8 21.1 23.1 25.0 18.2 12.4 16.4 17.98 1965 26.7 27.5 24.1 20.5 14.1 12.6 11.1 10.8 14.2 19.0 19.7 24.9 25.8 19.6 11.5 17.6 18.62 1966 26.0 24.7 23.6 17.8 13.8 10.9 10.8 10.8 12.8 16.3 22.6 23.5 25.2 18.4 10.8 17.2 17.92 1967 25.4 25.2 21.7 20.3 14.7 12.6 10.4 10.3 14.8 20.1 21.7 24.1 24.7 18.9 11.1 18.9 18.39 1968 26.9 25.4 20.8 17.4 12.2 11.8 10.4 9.4 12.4 17.1 20.4 23.6 25.5 16.8 10.5 16.6 17.36 1969 26.3 26.1 22.2 19.2 14.0 11.8 10.0 11.7 13.7 20.3 22.9 23.8 25.3 18.5 11.2 19.0 18.48 1970 26.5 26.5 24.0 16.5 13.5 11.5 10.5 11.1 13.4 17.8 20.8 25.6 25.6 18.0 11.0 17.3 17.99 1971 25.9 24.8 23.1 18.2 13.4 11.5 10.9 11.0 13.0 15.8 18.3 23.1 25.4 18.2 11.1 15.7 17.62 1972 26.3 26.9 23.9 19.3 16.7 12.6 10.4 11.3 13.4 17.0 21.6 27.0 25.4 20.0 11.4 17.3 18.54 1973 25.4 25.0 22.5 18.6 14.5 9.9 11.3 10.8 12.3 16.8 19.9 23.7 25.8 18.5 10.7 16.3 17.83 1974 26.6 24.4 23.5 16.6 13.6 11.2 10.9 11.3 13.9 16.0 20.0 24.7 24.9 17.9 11.1 16.6 17.64 1975 24.3 26.4 21.4 18.0 13.5 11.2 11.2 10.5 999.9 15.4 20.6 23.9 25.1 17.6 11.0 16.3 17.50 1976 25.0 26.2 999.9 999.9 15.0 11.2 11.6 11.6 999.9 17.5 18.7 25.2 25.0 999.9 11.5 16.4 17.77 1977 26.3 26.8 22.0 18.9 13.1 12.5 12.0 12.4 13.4 999.9 20.9 26.8 26.1 18.0 12.3 17.0 18.36 1978 26.5 25.9 23.7 21.1 13.9 10.9 10.6 11.7 12.9 999.9 21.2 999.9 26.4 19.6 11.1 16.9 18.49 1979 26.5 25.4 23.9 18.8 12.5 11.4 10.7 10.4 13.2 18.1 21.5 24.8 25.5 18.4 10.8 17.6 18.08 1980 26.9 24.7 24.9 17.9 14.7 11.0 10.4 11.5 14.9 15.2 22.7 999.9 25.5 19.2 11.0 17.6 18.30 1981 25.0 22.6 23.2 21.8 14.4 9.0 9.9 11.0 15.6 18.2 18.1 21.8 23.4 19.8 10.0 17.3 17.60 1982 25.2 25.6 20.9 19.1 14.0 10.2 9.4 14.1 14.2 17.9 23.8 999.9 24.2 18.0 11.2 18.6 18.02 1983 26.7 25.6 23.0 18.3 15.4 13.0 10.2 13.2 15.3 19.0 19.7 999.9 25.7 18.9 12.1 18.0 18.68 1984 25.8 24.8 20.8 999.9 13.9 11.1 10.0 10.4 12.4 17.9 20.2 22.9 24.9 17.4 10.5 16.8 17.39 1985 26.2 27.9 24.2 999.9 13.8 12.8 11.3 11.1 14.9 17.1 21.7 21.6 25.7 19.0 11.7 17.9 18.58 1986 26.3 24.3 24.2 18.2 13.7 12.2 8.8 9.6 14.0 15.2 21.1 23.2 24.1 18.7 10.2 16.8 17.43 1987 24.6 25.1 23.0 20.0 12.7 12.6 11.0 11.6 15.7 18.1 19.9 25.5 24.3 18.6 11.7 17.9 18.13 1988 25.5 25.6 23.4 19.6 14.8 13.3 10.8 11.9 14.8 18.2 19.7 22.3 25.5 19.3 12.0 17.6 18.59 1989 24.8 26.4 22.8 19.4 14.4 10.8 9.8 10.8 14.6 15.9 22.3 24.1 24.5 18.9 10.5 17.6 17.86 1990 25.0 24.3 23.8 18.2 15.6 9.7 9.5 10.9 14.7 17.1 21.5 24.0 24.5 19.2 10.0 17.8 17.87 1991 26.4 27.2 23.3 19.8 16.2 12.6 11.4 11.8 15.0 20.2 19.6 24.8 25.9 19.8 11.9 18.3 18.96 1992 26.0 24.9 23.4 18.7 14.0 12.2 11.5 10.7 11.7 17.6 999.9 999.9 25.2 18.7 11.5 16.5 17.97