Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann 1895 38.50 33.20 50.30 59.90 66.00 76.70 77.40 78.00 76.70 55.60 49.80 42.40 58.70 1896 40.00 44.10 48.60 65.70 73.70 75.40 79.40 80.40 73.40 58.90 53.10 42.40 61.30 1897 38.40 46.70 55.00 59.20 65.90 77.70 79.00 76.70 73.80 64.10 51.40 43.90 61.00 1898 45.30 41.60 56.20 55.00 71.10 78.40 78.60 77.90 73.60 58.70 46.50 41.00 60.30 1899 39.70 36.20 51.30 58.70 73.20 79.00 79.10 80.00 70.90 62.70 52.30 39.90 60.20 1900 40.00 39.70 49.00 60.70 68.60 75.10 79.10 80.60 76.50 66.10 51.80 42.90 60.80 1901 42.10 39.40 50.40 54.30 67.80 77.30 81.50 76.90 70.00 59.40 45.70 38.50 58.60 1902 39.70 36.80 51.10 58.40 73.70 77.30 81.00 79.10 70.00 60.50 55.20 41.90 60.40 1903 39.70 44.20 56.30 58.30 67.80 70.60 78.90 78.50 70.80 60.60 47.70 37.60 59.20 1904 36.90 43.10 53.70 55.80 67.20 75.80 77.30 77.10 74.10 60.20 49.10 42.80 59.40 1905 35.40 34.30 56.20 60.50 71.40 77.30 78.30 77.90 73.90 60.90 51.60 39.90 59.80 1906 43.60 41.80 47.40 62.40 67.30 76.40 76.30 78.90 76.20 58.00 51.20 45.50 60.40 1907 50.10 44.10 60.80 53.60 65.50 73.50 80.40 78.60 72.80 58.90 48.20 42.40 60.70 1908 39.50 40.00 58.90 63.30 68.90 76.10 78.70 78.00 71.50 58.50 54.20 46.50 61.20 1909 46.10 47.60 51.80 60.30 66.70 76.80 78.00 78.80 72.10 59.40 56.70 37.30 61.00 1910 41.30 41.20 58.30 59.70 65.10 72.50 77.80 77.90 75.20 64.00 47.90 38.00 59.90 1911 46.30 49.70 53.40 59.10 71.00 79.40 76.90 78.00 78.40 65.20 46.40 45.80 62.50 1912 35.10 39.00 48.50 61.40 69.00 72.80 77.90 76.90 75.10 62.30 47.40 42.90 59.00 1913 47.50 43.20 51.50 59.40 69.20 76.50 80.70 79.60 70.60 59.10 52.20 44.10 61.10 1914 44.00 41.00 47.70 60.70 69.70 81.60 80.10 77.70 70.90 61.70 49.60 39.00 60.30 1915 40.40 44.70 43.70 63.00 71.50 74.90 78.80 76.50 74.30 63.50 53.10 42.30 60.60 1916 47.80 43.30 50.50 59.10 71.50 74.60 77.40 79.00 70.80 61.40 51.10 42.10 60.70 1917 45.40 43.80 52.40 61.80 62.60 74.80 78.10 75.90 69.80 54.70 48.70 34.20 58.50 1918 32.40 48.60 57.90 58.10 71.30 77.10 76.20 79.60 66.90 65.60 49.70 47.90 60.90 1919 42.00 43.60 53.30 60.50 67.60 77.50 79.00 77.40 72.60 71.20 53.50 42.60 61.70 1920 42.20 42.20 49.60 58.50 67.20 75.60 77.80 76.00 74.50 62.00 48.20 42.50 59.70 1921 45.20 47.00 60.90 60.40 68.10 79.50 80.20 78.20 79.90 59.30 54.30 47.20 63.30 1922 42.00 50.20 52.90 63.00 69.30 77.30 79.10 77.10 75.30 62.20 52.60 49.20 62.50 1923 46.60 43.50 51.70 59.30 66.30 75.10 77.50 78.50 73.70 60.10 48.60 50.50 60.90 1924 36.80 39.60 47.80 59.60 63.80 77.20 77.50 80.30 68.40 60.80 52.00 43.40 58.90 1925 41.80 49.60 54.50 65.20 66.60 80.40 81.20 79.10 81.60 59.90 48.30 39.30 62.30 1926 40.60 46.90 45.40 57.80 68.20 75.40 78.20 79.60 77.70 63.60 47.00 45.80 60.50 1927 44.40 54.00 53.70 63.90 71.00 74.00 78.10 75.60 75.20 64.40 55.60 43.20 62.80 1928 41.70 43.60 51.80 57.00 66.50 73.60 79.10 78.90 69.90 64.40 50.10 43.70 60.00 1929 44.00 41.30 55.80 63.20 69.10 74.90 78.50 77.90 72.10 59.60 50.70 42.20 60.80 1930 42.10 49.50 48.60 62.10 70.30 75.30 82.10 77.90 75.50 58.30 49.40 39.50 60.90 1931 42.20 46.60 47.10 58.90 66.80 79.10 82.20 77.40 77.70 64.10 57.50 50.90 62.50 1932 50.30 52.60 48.70 61.60 68.10 78.90 81.80 80.00 72.80 60.20 47.30 45.50 62.30 1933 49.00 44.10 52.00 60.00 73.20 78.10 79.50 78.60 77.90 62.40 50.70 51.30 63.10 1934 45.30 39.30 50.40 61.40 70.80 78.60 81.90 80.40 73.90 63.60 54.10 42.40 61.80 1935 43.70 45.50 57.30 61.00 69.40 74.90 80.00 79.90 72.90 62.90 53.60 36.20 61.40 1936 38.30 40.50 55.70 58.70 72.10 79.80 81.10 80.00 76.30 63.40 49.30 46.80 61.80 1937 53.70 44.70 50.10 59.40 69.50 78.00 78.20 78.70 70.70 58.60 47.80 42.00 60.90 1938 43.30 51.30 58.60 60.80 70.00 73.80 78.40 80.40 72.70 63.00 52.10 43.10 62.30 1939 44.10 48.70 54.50 58.90 67.90 78.30 79.50 77.40 75.30 64.00 48.60 44.20 61.80 1940 28.60 41.80 50.60 58.70 65.90 76.10 76.60 78.50 70.90 62.30 49.40 47.20 58.90 1941 43.00 39.40 46.30 62.60 70.80 76.60 79.30 79.40 76.20 69.20 49.80 46.10 61.60 1942 40.10 39.90 52.00 61.70 69.00 77.00 79.50 76.30 70.80 61.90 52.80 42.30 60.30 1943 44.90 45.80 49.50 59.80 70.50 80.10 79.60 80.50 69.60 58.70 48.60 42.80 60.90 1944 42.80 49.50 52.40 59.40 71.00 79.00 78.30 77.70 73.20 60.50 49.60 39.70 61.10 1945 41.90 46.80 61.10 62.70 65.30 75.30 78.60 77.60 75.30 59.50 53.10 36.90 61.20 1946 43.20 45.90 58.30 62.50 67.60 74.40 78.20 77.50 71.00 60.50 56.40 45.40 61.70 1947 45.00 36.80 44.10 62.10 66.70 74.80 75.30 79.90 74.60 65.40 48.20 42.80 59.60 1948 35.20 46.90 55.10 63.60 67.90 76.60 79.50 76.20 71.00 57.20 52.80 45.20 60.60 1949 50.00 48.70 49.50 57.30 69.80 75.90 79.90 77.40 69.30 66.20 48.30 45.30 61.50 1950 54.70 49.50 49.40 57.10 70.90 74.90 76.50 74.90 71.20 65.30 46.30 38.80 60.80 1951 43.40 46.20 52.40 58.50 67.50 76.40 78.60 79.60 73.60 63.50 46.30 45.80 61.00 1952 48.80 47.60 50.60 60.00 69.40 81.20 80.60 77.70 69.40 55.80 50.30 41.80 61.10 1953 46.00 46.10 53.80 59.00 72.00 78.70 78.80 78.00 71.30 63.30 49.80 41.20 61.50 1954 43.10 47.90 50.50 65.20 63.70 75.70 82.30 81.00 75.70 63.00 48.10 41.90 61.50 1955 40.70 45.60 54.00 64.10 70.20 70.70 79.30 79.70 74.60 59.40 49.10 42.00 60.80 1956 39.50 49.80 52.20 58.20 70.50 75.20 78.60 78.80 70.10 63.20 48.70 52.00 61.40 1957 44.00 52.40 50.30 63.30 69.90 76.60 78.80 78.10 73.30 57.10 52.00 44.30 61.70 1958 37.40 35.30 48.00 60.30 69.10 76.10 78.20 77.90 72.00 59.70 53.00 39.80 58.90 1959 39.60 45.80 49.10 60.60 70.60 74.70 78.70 78.90 72.40 64.10 48.80 45.00 60.70 1960 42.70 41.50 39.60 61.70 65.50 75.90 79.40 78.10 72.10 62.00 50.30 37.80 58.90 1961 36.00 47.80 53.40 55.50 64.00 72.20 76.50 76.00 72.90 59.30 54.50 42.60 59.20 1962 39.50 49.90 47.50 56.20 73.30 74.70 77.60 77.90 70.90 62.00 48.20 38.80 59.70 1963 35.20 37.50 54.70 62.20 67.30 73.30 75.30 76.50 70.20 62.30 50.00 34.00 58.20 1964 38.80 38.60 49.50 60.70 68.40 76.50 75.90 75.20 71.40 56.60 53.40 44.70 59.10 1965 42.30 41.40 47.90 62.70 70.20 72.40 76.20 76.60 71.80 58.30 52.60 42.70 59.60 1966 36.00 41.60 49.60 59.50 65.70 72.40 78.50 75.40 69.60 57.30 50.90 41.70 58.20 1967 41.80 40.10 54.70 63.00 65.00 72.00 73.20 73.10 65.70 57.90 45.90 46.20 58.20 1968 37.30 36.20 50.10 59.20 65.10 73.90 77.20 78.60 69.20 60.00 48.60 38.30 57.80 1969 38.40 41.80 44.40 60.90 66.80 75.70 79.50 75.00 69.20 59.50 46.60 39.30 58.10 1970 34.00 41.10 50.20 61.80 67.70 72.70 77.30 77.70 75.40 62.60 47.40 45.60 59.50 1971 40.30 40.80 45.90 58.50 64.30 76.20 75.80 76.20 73.20 65.80 49.80 50.40 59.80 1972 44.70 41.50 51.40 60.00 65.40 71.10 76.00 77.00 73.60 59.20 48.80 46.60 59.60 1973 39.70 41.50 56.70 57.10 63.90 75.50 78.10 76.00 74.20 62.60 53.90 42.60 60.10 1974 50.80 44.60 56.90 59.20 68.70 70.70 76.90 75.60 68.10 57.30 49.80 42.30 60.10 1975 45.40 46.30 49.10 57.90 69.70 73.50 76.70 77.50 69.00 61.70 51.90 42.30 60.10 1976 36.40 49.50 55.00 59.30 63.40 72.20 75.90 75.90 69.20 55.70 43.20 38.90 57.90 1977 28.80 41.30 54.30 63.00 69.20 76.30 80.60 79.10 73.50 57.40 52.80 41.10 59.80 1978 32.00 36.20 48.30 60.60 66.50 75.30 79.20 77.50 74.50 59.20 55.40 42.70 58.90 1979 35.30 39.30 52.40 60.00 67.20 72.40 75.70 76.50 70.30 58.60 50.80 42.40 58.40 1980 42.10 38.00 48.30 58.10 66.80 74.40 81.60 80.60 74.90 57.20 48.30 41.00 59.30 1981 35.90 42.90 48.10 64.30 63.60 77.10 79.20 74.90 68.50 58.20 50.40 38.00 58.40 1982 35.40 44.00 53.80 55.70 68.80 72.90 77.70 75.30 68.80 60.10 51.50 48.40 59.40 1983 38.60 43.40 50.10 54.50 65.70 71.50 78.50 79.60 69.00 59.60 48.90 36.80 58.00 1984 36.80 43.90 49.20 56.40 64.70 75.20 75.50 75.80 68.70 66.90 47.80 50.10 59.20 1985 32.70 41.10 54.10 61.10 67.00 74.30 76.50 75.70 69.30 64.40 59.30 37.80 59.40 1986 39.00 47.90 51.60 60.00 68.70 77.20 81.30 76.40 72.60 60.90 54.90 42.50 61.10 1987 39.10 43.50 51.60 56.60 71.30 75.60 79.20 79.90 71.20 54.00 52.70 46.80 60.10 1988 36.40 42.10 52.00 59.90 65.20 76.20 78.30 79.30 71.20 55.40 52.60 43.20 59.32 1989 46.00 44.50 54.80 57.80 64.30 73.60 76.80 76.20 69.40 59.10 50.30 34.80 58.97