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 1881 23.6 24.9 20.5 19.1 13.9 10.0 10.3 10.6 13.4 18.2 20.9 23.2 24.2 17.8 10.3 17.5 17.45 1882 25.3 25.7 21.6 17.6 13.3 10.3 10.0 11.2 13.5 16.7 20.4 24.3 24.7 17.5 10.5 16.9 17.40 1883 24.8 23.2 21.3 18.4 14.7 13.4 10.8 10.2 12.1 16.2 19.1 22.5 24.1 18.1 11.5 15.8 17.38 1884 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 1885 24.3 24.0 21.6 17.3 13.5 11.3 11.6 11.3 12.5 16.7 20.4 24.4 23.6 17.5 11.4 16.5 17.25 1886 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 1887 23.9 22.9 21.6 16.1 12.9 10.3 9.9 10.8 12.9 16.6 21.3 24.0 22.8 16.9 10.3 16.9 16.74 1888 25.8 25.6 24.6 19.5 13.8 12.0 10.5 10.4 13.6 17.7 22.3 25.1 25.1 19.3 11.0 17.9 18.32 1889 24.5 26.7 23.2 19.1 13.2 10.8 9.2 10.3 13.2 14.4 19.2 23.4 25.4 18.5 10.1 15.6 17.41 1890 26.0 23.9 22.0 19.8 14.5 9.8 8.3 10.5 13.0 14.7 20.5 22.8 24.4 18.8 9.5 16.1 17.20 1891 24.0 25.3 22.1 19.1 14.7 11.5 9.8 11.5 12.2 16.7 21.4 22.5 24.0 18.6 10.9 16.8 17.59 1892 25.6 25.5 21.5 17.5 13.8 10.7 9.8 10.4 13.1 14.6 19.2 24.8 24.5 17.6 10.3 15.6 17.02 1893 25.5 25.3 23.1 15.6 13.1 8.9 10.3 11.1 13.8 15.3 19.5 23.7 25.2 17.3 10.1 16.2 17.19 1894 25.4 23.3 21.5 17.9 14.4 12.8 10.1 11.6 13.3 16.0 22.0 24.5 24.1 17.9 11.5 17.1 17.67 1895 23.9 22.6 23.0 15.7 13.9 11.6 10.5 13.0 13.3 18.3 999.9 23.8 23.7 17.5 11.7 17.6 17.62 1896 27.6 25.9 23.1 16.7 14.5 12.5 9.7 12.3 14.6 17.9 22.3 23.0 25.8 18.1 11.5 18.3 18.41 1897 26.9 23.6 22.0 19.6 14.8 12.5 12.1 10.9 13.6 14.8 20.2 24.0 24.5 18.8 11.8 16.2 17.83 1898 27.1 26.3 23.3 18.4 14.7 11.0 12.0 12.7 14.3 15.3 19.5 23.1 25.8 18.8 11.9 16.4 18.22 1899 24.2 25.4 22.0 17.3 13.5 11.8 11.5 11.5 13.2 16.1 19.0 23.7 24.2 17.6 11.6 16.1 17.38 1900 22.7 25.4 18.8 17.0 12.9 12.8 10.0 11.1 11.5 16.5 20.7 23.1 23.9 16.2 11.3 16.2 16.93 1901 25.7 23.6 21.2 19.6 14.3 11.0 9.6 11.7 13.2 16.3 20.4 22.4 24.1 18.4 10.8 16.6 17.48 1902 23.5 23.0 23.9 19.2 14.6 10.5 10.1 11.9 13.4 15.4 19.6 21.0 23.0 19.2 10.8 16.1 17.29 1903 26.2 24.5 20.0 15.9 14.1 12.5 10.6 11.4 12.7 14.8 19.4 23.4 23.9 16.7 11.5 15.6 16.93 1904 24.0 23.6 22.8 18.7 13.2 11.7 10.3 11.9 13.3 15.1 20.2 23.4 23.7 18.2 11.3 16.2 17.35 1905 23.1 23.6 21.6 18.6 14.8 11.2 10.4 10.1 12.7 15.3 19.6 24.5 23.4 18.3 10.6 15.9 17.03 1906 26.1 24.3 22.8 19.3 15.2 12.7 10.0 11.2 11.8 15.9 19.8 25.0 25.0 19.1 11.3 15.8 17.80 1907 24.2 25.7 22.7 18.6 14.4 12.0 12.2 13.2 13.9 15.0 18.4 21.8 25.0 18.6 12.5 15.8 17.94 1908 23.6 23.4 19.9 17.5 13.7 9.8 10.5 10.8 12.5 15.5 19.3 24.3 22.9 17.0 10.4 15.8 16.53 1909 23.9 24.9 22.0 17.2 14.4 11.8 9.6 11.8 14.2 14.9 19.0 25.0 24.4 17.9 11.1 16.0 17.33 1910 25.1 25.5 22.9 19.6 14.4 11.6 10.9 12.1 14.1 13.8 19.0 21.9 25.2 19.0 11.5 15.6 17.83 1911 25.3 24.2 21.1 18.7 13.3 10.8 11.4 11.4 13.0 16.5 20.9 22.5 23.8 17.7 11.2 16.8 17.38 1912 26.0 26.3 23.7 19.4 15.4 12.0 11.4 12.3 12.7 16.3 19.3 24.0 24.9 19.5 11.9 16.1 18.11 1913 23.9 24.8 22.1 18.9 14.1 12.8 10.9 11.9 13.4 14.8 19.7 21.7 24.2 18.4 11.9 16.0 17.61 1914 25.9 24.1 22.4 16.8 13.9 12.1 10.8 13.3 15.6 19.3 20.8 24.8 23.9 17.7 12.1 18.6 18.06 1915 26.6 25.2 21.7 20.1 15.5 13.7 11.6 12.0 12.6 15.7 21.0 24.9 25.5 19.1 12.4 16.4 18.38 1916 23.4 23.7 22.5 17.2 14.5 11.4 9.7 11.3 14.0 14.6 19.6 22.3 24.0 18.1 10.8 16.1 17.23 1917 24.3 22.7 19.6 17.2 12.4 11.4 11.7 10.7 12.5 14.8 19.0 21.1 23.1 16.4 11.3 15.4 16.55 1918 25.8 23.9 20.9 19.8 14.6 13.0 10.8 11.4 14.9 15.3 20.9 23.7 23.6 18.4 11.7 17.0 17.70 1919 24.3 24.6 24.5 18.2 13.9 11.8 12.9 11.3 12.3 14.5 19.9 22.9 24.2 18.9 12.0 15.6 17.66 1920 25.9 24.3 22.8 18.5 14.8 12.3 10.5 10.8 13.8 16.4 22.0 22.7 24.4 18.7 11.2 17.4 17.92 1921 24.8 28.2 24.2 18.1 15.8 13.2 12.8 12.3 12.6 15.4 18.4 24.0 25.2 19.4 12.8 15.5 18.21 1922 23.6 23.7 22.8 18.3 13.4 11.4 9.8 12.0 12.9 15.8 20.1 20.5 23.8 18.2 11.1 16.3 17.32 1923 24.0 26.0 23.8 20.1 15.0 11.8 11.1 11.2 12.1 15.2 20.2 22.4 23.5 19.6 11.4 15.8 17.58 1924 23.2 23.6 21.1 19.5 14.6 11.6 11.1 10.8 13.7 14.5 19.0 23.8 23.1 18.4 11.2 15.7 17.09 1925 22.9 22.3 21.5 18.1 14.7 12.1 9.6 10.5 13.2 14.8 22.2 23.5 23.0 18.1 10.7 16.7 17.14 1926 26.9 23.8 21.3 17.9 13.8 11.6 11.3 11.4 13.7 16.0 20.4 22.4 24.7 17.7 11.4 16.7 17.63 1927 23.0 25.7 20.2 19.5 13.6 11.4 10.7 11.8 14.0 15.6 20.3 24.5 23.7 17.8 11.3 16.6 17.35 1928 23.9 23.5 21.7 18.5 13.9 12.4 10.9 12.5 13.4 14.1 20.4 23.3 24.0 18.0 11.9 16.0 17.48 1929 22.8 23.8 20.5 17.2 13.8 11.1 9.8 11.1 12.8 15.9 18.8 23.0 23.3 17.2 10.7 15.8 16.74 1930 25.4 24.9 24.3 18.7 16.2 14.3 11.6 12.0 14.0 15.8 19.8 22.7 24.4 19.7 12.6 16.5 18.33 1931 24.5 22.8 22.5 18.1 12.3 9.6 11.8 11.3 12.4 16.1 19.0 25.1 23.3 17.6 10.9 15.8 16.93 1932 26.9 25.0 21.1 17.6 15.0 11.2 11.4 10.2 13.4 15.4 19.4 22.5 25.7 17.9 10.9 16.1 17.64 1933 24.0 26.4 22.1 18.6 14.2 13.4 10.1 10.9 13.2 15.1 20.0 23.8 24.3 18.3 11.5 16.1 17.54 1934 26.2 26.1 22.6 16.7 15.7 11.5 10.5 11.3 13.3 14.7 17.6 22.0 25.4 18.3 11.1 15.2 17.50 1935 24.8 23.5 21.5 18.1 15.3 11.5 11.0 11.0 12.6 14.6 19.4 22.5 23.4 18.3 11.2 15.5 17.11 1936 24.3 24.1 24.0 18.1 13.7 11.3 10.7 12.8 14.7 16.3 21.7 24.0 23.6 18.6 11.6 17.6 17.85 1937 24.7 25.6 22.8 19.8 14.9 11.1 9.8 10.7 13.3 16.5 20.9 22.6 24.8 19.2 10.5 16.9 17.84 1938 23.8 23.4 21.6 19.1 14.7 11.3 11.2 12.0 14.8 16.1 21.0 23.7 23.3 18.5 11.5 17.3 17.63 1939 23.4 24.8 22.9 19.6 14.8 11.5 11.2 12.0 14.4 16.8 19.7 23.9 24.0 19.1 11.6 17.0 17.90 1940 24.2 26.2 23.0 17.2 14.2 13.7 11.2 12.2 13.8 17.1 20.7 22.4 24.8 18.1 12.4 17.2 18.12 1941 25.1 24.6 21.3 18.0 14.3 13.0 12.1 12.8 12.4 15.3 19.3 24.4 24.0 17.9 12.6 15.7 17.55 1942 24.4 24.2 21.0 18.2 14.0 12.1 9.8 12.0 13.0 15.4 20.7 23.1 24.3 17.7 11.3 16.4 17.43 1943 23.7 23.8 23.3 18.1 14.2 12.2 9.7 11.0 13.2 15.8 20.5 22.5 23.5 18.5 11.0 16.5 17.38 1944 25.9 25.1 22.0 18.0 13.2 12.3 11.3 12.1 13.8 17.9 21.0 20.2 24.5 17.7 11.9 17.6 17.93 1945 24.5 25.4 22.5 21.2 15.6 13.3 11.5 12.7 13.0 16.6 20.0 22.9 23.4 19.8 12.5 16.5 18.04 1946 23.8 22.7 21.0 19.0 14.8 11.6 12.3 11.4 15.0 18.9 18.5 23.4 23.1 18.3 11.8 17.5 17.66 1947 24.6 25.2 22.8 18.4 13.9 13.6 10.9 11.2 12.8 15.3 19.5 21.7 24.4 18.4 11.9 15.9 17.63 1948 25.6 25.7 24.6 17.2 15.0 12.0 11.7 13.2 13.8 16.3 18.8 21.4 24.3 18.9 12.3 16.3 17.97 1949 25.6 24.9 21.5 19.8 13.9 13.0 13.2 13.3 13.0 14.6 19.7 24.6 24.0 18.4 13.2 15.8 17.83 1950 25.9 24.9 23.7 20.3 15.5 11.8 11.4 12.1 13.7 15.4 18.0 22.6 25.1 19.8 11.8 15.7 18.11 1951 24.7 24.4 23.7 17.9 13.2 12.4 10.5 10.1 14.7 16.2 19.8 22.4 23.9 18.3 11.0 16.9 17.52 1952 25.9 25.3 22.5 19.2 13.6 13.3 9.3 11.5 13.1 15.2 18.9 19.9 24.5 18.4 11.4 15.7 17.52 1953 25.1 24.1 24.4 18.7 14.4 12.0 11.1 11.1 13.6 15.6 18.5 22.7 23.0 19.2 11.4 15.9 17.38 1954 26.1 24.9 22.8 16.6 13.6 11.0 11.3 11.7 13.9 17.0 18.2 23.7 24.6 17.7 11.3 16.4 17.48 1955 25.7 24.8 23.0 17.6 13.1 10.3 10.3 11.8 13.1 14.0 18.8 21.8 24.7 17.9 10.8 15.3 17.18 1956 26.9 25.7 23.1 17.0 13.4 10.4 11.1 9.9 13.2 14.8 19.8 23.3 24.8 17.8 10.5 15.9 17.26 1957 26.2 24.1 22.1 18.3 14.5 13.2 9.6 11.7 13.4 17.4 22.1 24.4 24.5 18.3 11.5 17.6 17.99 1958 27.5 25.3 23.5 18.5 15.7 12.1 10.9 10.9 12.8 15.4 20.0 24.9 25.7 19.2 11.3 16.1 18.08 1959 25.4 24.8 24.4 19.3 16.0 13.9 12.5 12.4 13.3 16.5 19.8 21.1 25.0 19.9 12.9 16.5 18.60 1960 23.1 25.5 20.6 16.4 12.3 10.9 10.6 10.4 12.5 17.0 20.0 24.0 23.2 16.4 10.6 16.5 16.70 1961 27.4 25.6 23.8 16.6 14.5 12.1 10.3 11.7 14.7 17.2 20.6 23.6 25.7 18.3 11.4 17.5 18.21 1962 27.5 25.6 21.7 20.0 16.4 13.7 10.3 12.3 13.0 14.3 19.8 24.4 25.6 19.4 12.1 15.7 18.18 1963 25.3 24.6 24.0 18.6 15.0 11.9 11.8 12.1 14.5 17.3 20.7 24.1 24.8 19.2 11.9 17.5 18.35 1964 25.0 24.4 22.8 17.0 13.3 14.1 12.4 11.8 12.6 13.5 18.9 22.0 24.5 17.7 12.8 15.0 17.49 1965 25.6 25.4 22.6 20.1 13.8 12.4 10.9 11.5 13.4 16.9 18.9 23.4 24.3 18.8 11.6 16.4 17.79 1966 25.6 23.7 22.3 17.6 13.5 11.3 10.8 10.7 12.3 15.3 20.9 22.8 24.2 17.8 10.9 16.2 17.28 1967 25.1 25.9 21.9 19.8 15.0 13.3 10.5 10.8 13.4 18.4 20.1 23.2 24.6 18.9 11.5 17.3 18.08 1968 25.4 24.0 19.9 16.3 11.7 12.5 11.1 9.8 12.1 999.9 999.9 22.6 24.2 16.0 11.1 999.9 16.69 1969 24.3 24.7 21.2 18.4 14.3 12.5 10.4 11.2 11.9 19.2 21.7 23.4 23.9 18.0 11.4 17.6 17.70 1970 25.0 25.9 23.8 17.3 13.9 12.8 11.8 10.9 12.7 16.5 19.6 24.3 24.8 18.3 11.8 16.3 17.80 1971 24.7 24.1 22.3 17.5 13.5 11.4 10.7 10.7 12.6 14.4 17.0 21.9 24.4 17.8 10.9 14.7 16.93 1972 25.6 27.1 23.1 18.3 16.3 12.2 10.8 11.3 13.3 16.4 22.1 26.3 24.9 19.2 11.4 17.3 18.20 1973 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 1974 26.2 24.1 23.7 17.2 13.7 11.7 11.6 12.0 13.8 14.7 18.7 23.9 24.6 18.2 11.8 15.7 17.57 1975 24.2 27.2 21.6 999.9 999.9 11.5 11.2 10.5 12.3 15.3 19.4 23.9 25.1 999.9 11.1 15.7 17.51 1976 24.4 26.4 23.4 19.2 999.9 11.1 11.8 11.6 13.5 17.5 18.1 23.4 24.9 19.3 11.5 16.4 18.01 1977 25.3 26.8 21.5 19.1 13.8 12.3 11.8 12.6 12.6 16.5 20.2 26.3 25.2 18.1 12.2 16.4 17.99 1978 26.7 26.2 24.3 20.8 14.4 11.1 10.8 10.7 12.1 999.9 999.9 999.9 26.4 19.8 10.9 999.9 18.62 1979 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 12.1 17.1 20.2 24.6 999.9 999.9 999.9 16.5 999.90 1980 26.9 24.5 24.7 16.7 15.0 11.8 11.1 12.0 13.3 14.5 20.7 23.0 25.3 18.8 11.6 16.2 17.98 1981 25.7 22.4 22.6 20.5 14.6 10.3 11.0 11.5 14.3 16.4 17.5 999.9 23.7 19.2 10.9 16.1 17.48 1982 23.8 25.4 21.1 18.2 14.1 11.3 10.3 12.3 13.0 16.8 22.0 24.1 24.0 17.8 11.3 17.3 17.60 1983 26.4 24.2 24.2 18.6 15.6 13.9 11.3 13.3 14.8 17.6 19.6 23.4 24.9 19.5 12.8 17.3 18.63 1984 25.6 25.5 20.8 19.3 14.7 11.6 10.7 11.1 12.8 16.7 19.6 21.6 24.8 18.3 11.1 16.4 17.65 1985 24.9 999.9 24.2 18.1 14.5 13.3 11.4 11.7 13.8 16.0 21.1 20.9 23.4 18.9 12.1 17.0 17.87 1986 26.5 999.9 21.9 17.5 14.4 999.9 9.4 10.1 999.9 999.9 999.9 999.9 23.9 17.9 10.0 999.9 16.86 1987 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 1988 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 1989 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 1990 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 999.9 15.9 20.3 23.2 999.9 999.9 999.9 16.5 999.90 1991 25.6 25.5 23.0 20.2 15.3 13.2 11.5 12.0 13.8 18.2 18.6 24.5 24.8 19.5 12.2 16.9 18.34 1992 26.0 24.2 22.9 19.8 14.2 13.3 12.5 11.7 12.3 16.8 999.9 999.9 24.9 19.0 12.5 16.3 18.17