Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Winter Spring Summer Autumn 1895 4.8 8.5 7.6 16.2 21.1 24.4 27.5 27.3 15.9 13.4 5.9 1.7 14.5 -9999.9 15 26.4 11.7 1896 -0.5 6.6 8.1 14.8 21.1 25.8 30 28.2 21.1 13 -5.1 3.1 13.9 2.6 14.7 28 9.7 1897 -0.3 2 2.5 17 23.9 24.8 26 29.3 21.6 14 0 -0.5 13.4 1.6 14.5 26.7 11.9 1898 -1.5 4.5 6.5 17 22 24.5 28.4 32.6 22.3 11.8 3.3 -1.2 14.2 0.8 15.2 28.5 12.5 1899 -0.9 -1.8 5.5 14.1 18.4 22.9 28 22 19.8 11.3 10.5 2.7 12.7 -1.3 12.7 24.3 13.9 1900 3.8 1.5 10.6 16.9 20.1 23.1 25.7 22.1 20 14.1 3.6 5.6 13.9 2.7 15.9 23.6 12.6 1901 -1.2 2 11.7 15.8 23.1 22.4 27.6 31.4 20.6 17.1 8.5 2.4 15.1 2.1 16.9 27.1 15.4 1902 0.4 5.2 9.6 16.2 20.5 22.8 26.7 27.6 20.3 14.7 4.2 -0.2 14 2.7 15.4 25.7 13.1 1903 1 0.9 4.3 14.5 20.9 27.7 26.6 24.6 16.8 12.9 5.4 2.6 13.2 0.6 13.2 26.3 11.7 1904 0.4 -1.6 4.4 17.8 20.1 24.3 29.4 29.2 22.7 14.8 10.8 2.5 14.6 0.5 14.1 27.6 16.1 1905 0 0.8 13.2 18.2 21.1 24.9 29.9 28.1 19.4 9.3 4.9 2 14.3 1.1 17.5 27.6 11.2 1906 1 3.6 9.4 19.2 20.6 22.9 33.6 28.6 20.8 14.5 4 0.4 14.9 2.2 16.4 28.4 13.1 1907 -11.1 0 6.9 16.5 23.4 24.9 29.8 25 21.4 15.3 8.7 2.6 13.6 -3.6 15.6 26.6 15.1 1908 0.4 -0.2 7 15.5 20.2 25.7 29.4 27 21 12.7 8.7 -1.1 13.9 0.9 14.2 27.4 14.1 1909 -8.9 2.2 11.8 14.6 21.5 26.9 28.7 27 23.6 13.5 5.3 -3.5 13.6 -2.6 16 27.5 14.1 1910 -0.4 -0.9 14 18.3 24.8 23.6 29.3 24.9 21.6 14.1 6.2 2.3 14.8 -1.6 19 25.9 14 1911 -8.3 -0.6 10.3 14.8 19.8 25.2 29.2 26.4 19.8 15.6 0.9 -0.3 12.7 -2.2 15 26.9 12.1 1912 -5 3.4 8.1 15.4 22.7 26.9 25.5 24.1 19.9 12.5 6.2 2.1 13.5 -0.6 15.4 25.5 12.9 1913 -6.5 -3.4 4.9 17 20.8 24.2 26.6 27.1 21.8 11.2 6.5 2.6 12.7 -2.6 14.2 26 13.2 1914 2 -0.1 10.1 18.2 21.7 24.9 29.5 28.8 19.2 14.7 6.1 -3.2 14.3 1.5 16.7 27.7 13.3 1915 -1.6 5.6 12.7 20.6 21.2 24 27.4 30.6 19.9 15 4.3 1.7 15.1 0.3 18.2 27.3 13.1 1916 -15.9 -1.8 9.4 16.4 20.2 24.5 25 28.5 21.2 13.4 3 -4.4 11.6 -5.3 15.3 26 12.5 1917 -5.2 -3 5.5 14.5 20.5 22.8 30.2 29.1 22.5 14.7 8.9 -2.4 13.2 -4.2 13.5 27.4 15.4 1918 -1.4 0.7 8.5 18 20.7 26.6 29.2 25.2 25.9 14.3 6.4 1 14.6 -1 15.7 27 15.5 1919 2.2 0.5 6.6 18 19.9 23.9 29.9 29.8 23.1 10.3 2.2 -3.5 13.6 1.2 14.8 27.9 11.9 1920 -1.9 3.4 9.1 14 20.3 23.6 31.4 28.8 20.1 11.5 6.3 3 14.1 -0.7 14.5 27.9 12.6 1921 0.8 3.9 8.1 15.1 23 25.8 28.5 26.7 18.6 15.3 3.1 -4.4 13.7 2.6 15.4 27 12.3 1922 -4.1 -5.1 7.9 15.5 21.1 28.8 29.6 27 23.1 13.7 4.9 -5.7 13.1 -4.5 14.8 28.5 13.9 1923 -0.5 -0.4 9.6 17.7 20.8 24.7 29.9 27.7 21.6 13.6 5.7 1.4 14.3 -2.2 16 27.4 13.6 1924 -2.7 7.3 10 15.8 26 25.8 28.9 26.5 22.6 15.3 3.3 -6.2 14.4 2 17.3 27.1 13.7 1925 -1.8 3.6 9.7 16.6 24.5 27 30.2 26.1 19.8 12 5.6 4.1 14.8 -1.5 16.9 27.8 12.5 1926 0.2 6.7 13.5 19.9 21.1 26.5 30.8 26.2 17.9 14.1 5.7 0.5 15.3 3.7 18.2 27.8 12.6 1927 -3.1 1.3 9.6 15.5 19.8 26 29.3 28.5 19.9 12.9 1.2 -7.5 12.8 -0.4 15 27.9 11.3 1928 -1.8 3.1 10 14.3 22.9 24.3 29.1 26.8 22 11.9 6.7 0.5 14.2 -2.1 15.7 26.7 13.5 1929 -7.6 -5.2 10.3 13.9 20.7 22.8 27.1 28.5 21.2 14.5 4.2 -1.1 12.4 -4.1 15 26.1 13.3 1930 -13.1 5 9.6 18 19.1 22.8 28.5 28.5 20.7 10.4 4.7 2.1 13 -3.1 15.6 26.6 11.9 1931 3.7 3.3 9.5 17.1 21.4 22.7 28.8 27.6 18.4 13.4 1.5 0.2 14 3 16 26.4 11.1 1932 -2.5 0.9 6.7 15.4 20.7 26 24.7 26.9 20.8 12.2 6.2 -1.1 13.1 -0.5 14.3 25.9 13.1 1933 1.6 -1.1 7.8 14.8 18.4 22.6 28.2 29.5 18.5 12.5 6.9 -0.9 13.2 -0.2 13.7 26.8 12.6 1934 2.5 3.6 10.6 21.7 23.5 26.3 28.8 29.1 19.6 14.4 8.2 -0.9 15.6 1.7 18.6 28.1 14.1 1935 -3.4 5.1 7.5 14.9 22.6 25.2 27.9 26 24.1 12.7 2.9 2.9 14 0.3 15 26.4 13.2 1936 -0.4 -11.2 7 18.6 24.6 26.3 30.5 28.6 20.8 14.9 3.8 0.9 13.7 -2.9 16.7 28.5 13.2 1937 -11.1 -2.9 9.8 14.8 20.7 26.6 29.7 24.6 24.6 15.9 4.5 0.1 13.1 -4.4 15.1 27 15 1938 0.2 0.9 10.1 18.1 22.7 28.9 31.3 25.5 24.2 15.6 4.8 0.2 15.2 0.4 17 28.6 14.9 1939 2.4 -0.6 8.6 18.2 22.4 22.2 29.3 30.3 22.3 12 9.6 6.9 15.3 0.7 16.4 27.3 14.6 1940 0.8 3.4 12.4 17.3 22 26.8 29.3 28.3 25.7 15.4 1.3 2.8 15.5 3.7 17.2 28.1 14.1 1941 3.4 5.7 16.1 20.5 21.6 26.4 32 28 17.8 13.4 8.4 3.1 16.4 4 19.4 28.8 13.2 1942 0.1 5.1 10.4 18.4 22.3 24.6 29.6 30.4 24.2 16.4 4.5 1.9 15.7 2.8 17 28.2 15 1943 -7.8 4.3 7.6 18.5 19.2 24 29.6 27.4 24.6 14.4 7.4 1.4 14.2 -0.5 15.1 27 15.5 1944 1.3 3.1 7.5 18.1 22.2 25.7 29.8 26.5 22.7 15.1 6.8 -1 14.8 1.9 15.9 27.3 14.9 1945 0.5 3.5 9.2 13.7 23 24.1 30.6 30.3 20.9 15.1 4.2 2 14.8 1 15.3 28.3 13.4 1946 1.5 4.2 11.5 15.2 24.8 22.4 28.6 29.6 22.9 12.2 1.6 0.2 14.6 2.6 17.2 26.9 12.2 1947 -1.7 3.3 11.1 17.7 24.2 22.7 28.7 26.9 24.1 14.9 4 3.1 14.9 0.6 17.7 26.1 14.3 1948 1.9 -0.8 7.6 13.4 21.3 28.4 26.5 23.8 21.1 13.6 5.8 -3.7 13.2 1.4 14.1 26.2 13.5 1949 -6.4 -2.4 8.6 17.1 24.3 24.4 27.5 27.9 24.1 12 8.7 -2.8 13.6 -4.2 16.7 26.6 14.9 1950 -17.5 3.7 7.7 14.5 19.4 27.7 30.4 28.9 26.7 12.4 4.2 2.9 13.4 -5.5 13.9 29 14.4 1951 -2.6 -0.4 3.9 17.4 21.4 25.4 30.7 28 23.2 10.9 5.4 -5 13.2 0 14.2 28 13.2 1952 -5.2 2.6 7.9 16.8 21.8 23.4 28.5 28.5 24.9 17 5.4 3.5 14.6 -2.5 15.5 26.8 15.8 1953 2.6 4.6 11.3 14.6 22.3 22.1 28.2 27.9 23.2 15.7 9.2 2.9 15.4 3.6 16.1 26.1 16 1954 -5.8 6.3 7.3 12 21.5 23 26.5 24 20.2 12.8 9.7 4 13.5 1.1 13.6 24.5 14.2 1955 -0.3 0.2 3.4 14 18.6 25.2 28.1 28.1 22.9 14 -0.5 -4.1 12.5 1.3 12 27.1 12.1 1956 -2 -3.7 6.5 18 23.9 21.8 31 28.2 22.9 12 3.8 -0.2 13.5 -3.3 16.1 27 12.9 1957 -10.1 -0.6 8.8 16.3 24.3 24.8 25.8 24.7 25.3 12 6 4.9 13.5 -3.6 16.5 25.1 14.4 1958 3.4 5.6 10.6 16.1 27.4 29.3 32.6 30.8 21.4 14.7 3.4 1.5 16.4 4.6 18 30.9 13.2 1959 -0.6 0.9 10.7 17.6 19.9 24.4 30.3 25.2 19.2 11.4 1.7 2.7 13.6 0.6 16.1 26.6 10.8 1960 -3.1 4.4 9.4 17.1 19.4 25.2 33.4 26.4 22.4 15 5.1 0 14.6 1.3 15.3 28.3 14.2 1961 2.1 6 11.2 15.9 22.3 30.3 30.9 31.3 20.1 12.7 2.9 -0.6 15.4 2.7 16.5 30.8 11.9 1962 -2.9 1.4 6.5 18.2 19.1 25.3 27.9 25.7 22.1 13.8 8.6 4.2 14.2 -0.7 14.6 26.3 14.8 1963 -4.2 5.2 11 16.1 22.4 25.2 26.4 29.3 25.5 16.6 7 0.5 15.1 1.7 16.5 27 16.4 1964 1.9 5.7 8.8 14.8 20.2 24 27.5 24.6 18.4 14.9 5.4 -5.3 13.4 2.7 14.6 25.4 12.9 1965 -1.8 1.9 7.5 17.1 20.6 25.9 29.9 26 19.4 15.9 5.2 1.2 14.1 -1.7 15.1 27.3 13.5 1966 -2.7 3.9 10.9 15.9 21.6 23.1 25.8 27 24.1 14.3 5.2 3.6 14.4 0.8 16.1 25.3 14.5 1967 2 6.6 8.3 14.3 20.4 28.4 29.2 32.4 26.6 13.8 5.8 1.5 15.8 4.1 14.3 30 15.4 1968 0.4 5.5 12 14.6 20.6 23 29.4 25.3 20.9 13.4 6.3 -3.2 14 2.5 15.7 25.9 13.5 1969 -12.1 1.2 9.8 16.4 23.4 28.9 26.5 25.9 20.4 12.8 7 2.6 13.6 -4.7 16.5 27.1 13.4 1970 -2.5 5 10.3 15.1 20.9 28.2 29.6 29.2 18.9 12.4 2.4 -1.3 14 1.7 15.4 29 11.2 1971 -2 2.8 6.8 16.6 22.3 22.3 29.9 31.2 20.1 13.3 6.6 -5.6 13.7 -0.2 15.2 27.8 13.3 1972 -6.8 0.3 9.3 13 22.9 23.3 28.2 29.2 18.7 12.2 6.1 -1.3 12.9 -4 15.1 26.9 12.3 1973 -0.8 3.2 11.5 16.6 22.5 24.5 29.1 28.2 23.5 13.4 1.7 3.4 14.7 0.4 16.9 27.3 12.9 1974 -0.6 5.5 9.5 16.4 18.6 26.9 26.4 29.4 24.7 15 6.3 3.4 15.1 2.8 14.8 27.6 15.3 1975 -2.7 -3.8 6.6 15.2 20.7 23.6 30.5 24.5 24 14.6 6.6 1.5 13.4 -1 14.2 26.2 15.1 1976 0.4 4.4 7 16.6 20.4 22.8 26.6 22.4 22.2 13.2 5.8 3.4 13.8 2.1 14.7 23.9 13.7 1977 -1.3 6.2 10.5 18.5 19.8 27 26.8 29.7 19.7 14.2 3.7 -3.6 14.3 2.8 16.3 27.8 12.5 1978 -3.2 2.9 10.9 15.4 19.6 26.7 30 26.6 19.4 14.5 2.2 -2.3 13.6 -1.3 15.3 27.8 12 1979 -9.1 0.7 11.8 15.6 21.4 26.4 30.1 29.6 24.2 16.2 4.7 3.9 14.6 -3.6 16.3 28.7 15 1980 -2.9 3.6 9.4 19.8 21.8 23.7 28.1 25 20.3 15.8 7.6 -0.4 14.3 1.5 17 25.6 14.6 1981 3.8 5.1 13 16 20.6 21.7 27.4 31.4 22.5 13.4 9.1 1 15.4 2.8 16.5 26.8 15 1982 -4.1 2.8 9.5 14.8 20.9 28.6 25.7 26.1 21.8 13.7 2.6 1.7 13.7 -0.1 15.1 26.8 12.7 1983 3.7 6.9 11.7 16.6 23.7 24 26.3 28.9 19.6 14.7 8 -5.8 14.9 4.1 17.3 26.4 14.1 1984 0.2 5.6 12.2 15 17.9 23.4 29.7 28.1 18.7 11.9 3.6 -4.8 13.5 0 15 27.1 11.4 1985 -1.5 1.7 10 15.8 22.4 24.8 32.4 27 18.1 12.9 -4.6 -2.7 13 -1.5 16.1 28.1 8.8 1986 3.2 0.7 12.5 14.2 21 26.4 24.6 30 19.6 14.3 5.4 1.4 14.4 0.4 15.9 27 13.1 1987 2.4 6.9 13.1 18.3 22.7 28 27.8 27.2 26 15.6 8.4 2.1 16.5 3.6 18 27.7 16.7 1988 -0.6 4.6 11 18.1 21.4 24.9 28.5 26.7 21.6 13.7 7.7 1.2 14.9 2 16.8 26.7 14.3 1989 1.3 -1.5 9.9 18.6 21.4 26.1 29.3 26 23.1 14.5 6.5 2.3 14.8 0.3 16.6 27.1 14.7 1990 2.2 2.5 12.3 18.1 19.7 23.6 29.3 28.6 25.5 13.4 6.6 -3.2 14.9 2.3 16.7 27.2 15.2 1991 -5 9.2 9.3 18.1 21.3 23 28.5 27.6 23.3 13.2 5.9 3.7 14.8 0.3 16.2 26.4 14.1 1992 4.9 6.9 14.6 17.3 22.4 28.1 27.9 28.9 19.2 13.8 5.3 -3.8 15.5 5.2 18.1 28.3 12.8 1993 -7.4 0.4 10.3 15.6 25.5 23.6 24.1 25.9 24.1 13.7 3.2 2.9 13.5 -3.6 17.1 24.5 13.7 1994 3.4 1 13.7 17.3 22.3 24.7 31.2 28 24.6 13.3 4 2 15.5 2.4 17.8 28 14 1995 -0.4 6.1 10.8 15.6 23.1 26 27.7 23.8 25.2 12.7 5.5 0.6 14.7 2.6 16.5 25.8 14.5 1996 -4.1 2.1 8.5 16.4 17.2 23.1 30.1 28.5 19.6 11.6 1.2 -5 12.4 -0.5 14 27.2 10.8 1997 0.3 2.7 8.8 15.2 21.4 23.3 26.3 28.4 22.6 12.6 6 3.5 14.3 -0.7 15.1 26 13.7 1998 0.1 8 10.3 17.5 24.4 25.5 31.7 30.6 25.1 12.8 8.1 1.7 16.3 3.9 17.4 29.3 15.3 1999 2.8 7.8 10.1 16.4 19.4 23 25.9 29.2 22.5 13.4 8 3.1 15.1 4.1 15.3 26 14.6 2000 -0.9 3.5 11.4 16.9 19.5 24.3 27.1 27.1 21 13.6 4.5 -1 13.9 1.9 15.9 26.2 13 2001 2.2 2.3 10.8 15.7 21.5 23 27.3 28.3 23.9 12.7 9.1 1.4 14.9 1.2 16 26.2 15.2 2002 0.7 4.7 6.3 15.8 18.9 26.9 29.2 28.1 22.4 13.3 6.7 3.8 14.7 2.3 13.7 28.1 14.1 2003 2.9 5.2 10.5 15.9 19.9 27.4 32.1 30.8 24.3 17 2.2 2.5 15.9 4 15.4 30.1 14.5 2004 -1.5 3.8 13.2 20 21.2 28.7 31 29.2 19.9 14 6.2 2.4 15.7 1.6 18.1 29.6 13.4 2005 -2.8 6.2 12.5 18.6 24.2 22.8 28 29.7 21.3 14 5.5 0.2 15 1.9 18.4 26.8 13.6 2006 5.1 4.4 10.3 17.8 21.8 26.9 31.6 29.9 23.6 14.4 5 2.5 16.1 3.2 16.6 29.5 14.3 2007 0.4 4.2 11.6 16 23.5 24.2 31.3 27.9 21 13.5 5.9 0.4 15 2.4 17 27.8 13.5