Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Winter Spring Summer Autumn 1895 -1.3 0.3 -2.9 2 6.4 8.9 11.5 11 4.7 0.6 -0.8 -4.7 3 -9999.9 1.8 10.5 1.5 1896 -9.3 -2.7 -4.3 2.1 6.5 9.8 12.7 10.7 6.6 3.5 -13.9 -1.7 1.7 -5.6 1.4 11.1 -1.3 1897 -6.6 -6.4 -6.8 4.3 9 12.1 12.3 13.2 7.5 3.2 -7.3 -7.5 2.3 -4.9 2.2 12.5 1.1 1898 -9.6 -3.9 -2.7 2.9 7 10.8 13.4 15.7 8.8 2.3 -3 -7.2 2.9 -7 2.4 13.3 2.7 1899 -7.7 -10.4 -3.5 1.8 5 10.2 12.9 11.7 8.8 3.2 4.6 -3.1 2.8 -8.4 1.1 11.6 5.5 1900 -2.4 -7.4 0.6 4.1 7.5 11.7 13.1 11.3 7.4 3.5 -4.6 -0.1 3.7 -4.3 4.1 12 2.1 1901 -9.8 -6.9 -0.1 1.9 7.7 9.1 11.3 12.9 7 4.4 1.3 -3.6 2.9 -5.6 3.2 11.1 4.2 1902 -6.8 -3.5 -1.3 2.2 7.8 8.8 11.9 11.3 6.6 3.6 -2.3 -7.3 2.6 -4.6 2.9 10.7 2.6 1903 -6 -8.2 -6.5 1.8 6.6 12.5 12.3 12.5 6.1 2.6 -2 -2.8 2.4 -7.2 0.6 12.4 2.2 1904 -6.9 -10.7 -4.4 3 5.7 9.5 12.6 11.1 7.6 3.2 2.7 -3.6 2.5 -6.8 1.4 11.1 4.5 1905 -6.1 -9.3 1.5 2.3 6.6 11.8 14.7 12.8 8.3 0.2 -1.7 -4.2 3.1 -6.3 3.5 13.1 2.3 1906 -6.3 -2.6 -2.6 4.5 8.1 9.9 16.3 12.8 9.1 4.7 -1.7 -4.6 4 -4.4 3.3 13 4 1907 -21 -7.8 -3 1.3 8.9 10.3 13.5 11.5 9 4 1.5 -3.3 2.1 -11.1 2.4 11.8 4.8 1908 -5.7 -8.8 -2.6 2.8 7.5 11.7 14.6 13 7.2 2.4 1.6 -7.7 3 -5.9 2.6 13.1 3.7 1909 -16.6 -6 -0.2 1.7 6 10.4 12.9 11.3 9.2 3.2 -1.7 -8.9 1.8 -10.1 2.5 11.5 3.6 1910 -8.1 -9.8 1.9 4 7.8 9.6 12.8 10.9 7.1 3.5 -0.4 -3.1 3 -8.9 4.6 11.1 3.4 1911 -16 -10.8 -2 0 6 10 12.7 11.1 6.5 1.1 -7.4 -6.1 0.4 -10 1.3 11.3 0.1 1912 -12.5 -4.5 -6.4 3 7.5 11.8 12.1 11.6 6.8 2.3 -0.4 -4.9 2.2 -7.7 1.4 11.8 2.9 1913 -14 -13.9 -4.9 1.8 6.9 10.5 12.4 12.9 7 2.1 -1.3 -2.6 1.4 -10.9 1.3 11.9 2.6 1914 -5.2 -7.6 -1.5 3.3 6.6 10 13.5 11.6 7.5 4.5 -0.3 -8.9 2.8 -5.1 2.8 11.7 3.9 1915 -8.8 -1.1 1.7 5.5 7.7 10.3 12.9 13.2 7.2 4.7 -3.4 -4.8 3.8 -6.3 5 12.1 2.8 1916 -23.9 -10.1 -0.7 2.8 6.4 10.3 11.4 11.4 6.7 0.6 -4.9 -11.1 -0.1 -12.9 2.8 11 0.8 1917 -11.9 -11.9 -4.3 1.1 7 9.2 12.7 12.4 7.2 2.6 2 -9.6 1.4 -11.6 1.3 11.4 3.9 1918 -7 -8.6 -1.7 1.7 6.3 10.6 13.6 11.8 7.6 3.5 -0.5 -4.6 2.7 -8.4 2.1 12 3.5 1919 -4.5 -7.6 -4.4 2.8 6.2 8.6 12.1 12.9 8 0.2 -4.4 -10.5 1.6 -5.6 1.5 11.2 1.3 1920 -9.8 -7 -2.1 0.9 4.2 9.3 14.4 12.6 7.8 2.2 -1.6 -2.4 2.4 -9.1 1 12.1 2.8 1921 -7.1 -5.2 -1.7 1.1 6.7 11.4 12.3 12.6 6.7 3.3 -3.6 -10.7 2.2 -4.9 2 12.1 2.1 1922 -11.6 -15.6 -2.7 1.3 6 11.3 13.3 12.5 9.3 3.5 -1.5 -10.6 1.3 -12.6 1.5 12.4 3.8 1923 -6.8 -10.2 -2.4 2.3 7.1 11 13.8 13.1 7.3 3 0.2 -4.5 2.8 -9.2 2.3 12.6 3.5 1924 -9.8 -1.2 -1.8 1.7 8.2 10.6 13.7 12.7 8.5 4.1 -3.3 -12.7 2.6 -5.2 2.7 12.3 3.1 1925 -9.8 -4.6 0.1 3 7.5 11.3 14.3 11.9 7.2 0.1 -2.1 -0.4 3.2 -9 3.5 12.5 1.7 1926 -4.5 -1.6 0.3 3.4 7.3 11.3 14.3 11.8 3.9 3.6 -1 -6 3.6 -2.2 3.7 12.5 2.2 1927 -9.9 -6.7 -1.1 1.2 6.1 12 13.6 13.2 8.9 3.4 -5.3 -13.1 1.9 -7.5 2.1 12.9 2.3 1928 -7.6 -5.2 -0.4 2.4 8.8 12.3 15 12.1 7.9 1.7 -0.3 -5.8 3.4 -8.6 3.6 13.1 3.1 1929 -13.5 -14.2 -0.2 1.6 7.2 11.1 12.4 13.3 7 3.5 -1.9 -6.4 1.7 -11.2 2.9 12.3 2.9 1930 -20.3 -3.8 -2 5.1 6.5 10.6 14.1 13.1 8.8 2.3 -0.1 -2.9 2.6 -10.2 3.2 12.6 3.7 1931 -1.7 -2.8 1 4.1 8.6 11.5 13.6 12.9 9 2.6 -4.9 -5.5 4 -2.5 4.6 12.7 2.2 1932 -8.6 -8.2 -2.3 4.6 7.6 12.1 12.6 13.6 7.6 3.3 0.7 -7.6 3 -7.4 3.3 12.8 3.9 1933 -5 -9 0.1 2.1 6.6 9.6 12.2 13.4 7.8 2.3 1.3 -8.2 2.8 -7.2 2.9 11.7 3.8 1934 -4.8 -4.8 -0.6 4.9 7.8 10 12.3 11.3 7.6 4.5 1.8 -5.8 3.7 -5.9 4 11.2 4.6 1935 -11.1 -2.9 -2.5 0.5 5.9 10.2 13 10.7 7.5 1.8 -3.4 -1.5 2.4 -6.6 1.3 11.3 2 1936 -6.8 -21.3 -2.7 3.3 8.8 11.6 13.5 13 7 3 -1.8 -5.5 1.8 -9.9 3.1 12.7 2.7 1937 -18.7 -11.7 -0.7 3.2 5.9 11 14.6 11 9.4 4 -1.8 -5.3 1.7 -12 2.8 12.2 3.9 1938 -5.4 -7.9 0.4 3.3 7.3 12.5 14.6 11.2 10.2 3.8 -2.5 -6.3 3.4 -6.2 3.7 12.8 3.8 1939 -3.8 -10.3 -2.3 3.7 7.4 9.4 13.2 12.1 8.6 2.7 2.7 0.8 3.7 -6.8 2.9 11.6 4.7 1940 -5.3 -2.7 1.2 4 7.5 11.1 13.8 11.8 10.3 5.3 -5.5 -2.3 4.1 -2.4 4.2 12.2 3.4 1941 -2.7 -3.5 1.5 4.7 7.3 11.1 14.4 12.5 6.7 4.4 -0.9 -3.8 4.3 -2.8 4.5 12.7 3.4 1942 -7.4 -2.6 -0.7 2.9 7.3 10.5 14.4 12.6 7.3 3.1 -2.9 -4.1 3.4 -4.6 3.2 12.5 2.5 1943 -16.4 -7.4 -4.7 3.2 5.9 9.5 12 11.8 6.2 3.4 0.1 -4.8 1.6 -9.3 1.5 11.1 3.2 1944 -6.3 -6.1 -2.6 3.8 7.7 12.4 13.6 11.4 9 4.6 0.5 -5.9 3.5 -5.7 3 12.5 4.7 1945 -4.8 -4.1 -0.5 1.5 6.5 10.2 13.1 11.7 6.5 2.9 -2.8 -3.4 3.1 -4.9 2.5 11.7 2.2 1946 -5.1 -5.4 0.9 4.3 7.4 10 12.1 11.3 8.2 1.3 -6 -6.9 2.7 -4.6 4.2 11.1 1.2 1947 -10.3 -6.2 -1.5 4.1 7.9 10.9 12.9 11.9 8 4.6 -0.5 -2.5 3.3 -7.8 3.5 11.9 4 1948 -4.9 -9.6 -3 2 7.9 13.9 12.4 12.3 7.6 1.9 -1.3 -11.2 2.3 -5.7 2.3 12.9 2.7 1949 -14.8 -12.7 -1.8 4.9 8.3 10.2 13 12.3 7.6 1.3 1.6 -9.1 1.7 -12.9 3.8 11.8 3.5 1950 -25.8 -4.3 -1.7 2.4 6.7 11.9 13.6 12.8 7.7 3.3 -2.6 -1.5 1.9 -13.1 2.5 12.8 2.8 1951 -10.7 -10.3 -6.7 -0.1 7.5 9.2 12 11.2 7.9 3.6 -2.2 -11.2 0.9 -7.5 0.2 10.8 3.1 1952 -14.2 -5.4 -2 3.5 5.9 9.4 11.8 11.6 7.3 2.2 -3 -2.9 2 -10.3 2.5 10.9 2.2 1953 -5.4 -2.4 -0.6 1.9 6.5 10.4 11 11.4 7.6 4.5 1.1 -4.1 3.5 -3.6 2.6 10.9 4.4 1954 -13.6 -2.4 -3.9 0.2 6.8 9.5 10.4 10.3 8.5 1.4 2.8 -3.7 2.2 -6.7 1 10.1 4.2 1955 -6.7 -7.9 -6.6 0.3 6.2 9.8 12.8 9.7 6.5 2.8 -9.5 -12.2 0.4 -6.1 0 10.8 -0.1 1956 -9.3 -13.3 -4 0.7 6.1 9.4 12.5 12 6.7 1.3 -2.2 -7.8 1 -11.6 0.9 11.3 1.9 1957 -18.7 -14.4 -1.8 2.2 8.4 10.9 11.5 10 8.2 1.5 -1.7 -2.1 1.2 -13.6 2.9 10.8 2.7 1958 -2.2 -0.6 -1.3 2.6 7.9 13.9 14.7 12.1 7.3 3 -3.3 -4 4.2 -1.6 3.1 13.6 2.3 1959 -7 -8.2 -0.1 1.8 6.2 10.3 12.3 10.4 8.5 3 -4.7 -3.4 2.4 -6.4 2.6 11 2.3 1960 -9.6 -2.5 -2.4 2.8 6.1 10.4 13.2 12.3 5.7 4.3 -1.8 -4.8 2.8 -5.2 2.2 12 2.7 1961 -4.2 -1.2 0 2.9 8.1 12.1 14.4 13.3 6.3 1.3 -4.9 -7.4 3.4 -3.4 3.7 13.3 0.9 1962 -11 -6.3 -4.4 3.3 6.2 9.2 11.8 11.7 6.5 3.5 0.5 -2.2 2.4 -8.2 1.7 10.9 3.5 1963 -13 -2.3 -0.5 3.6 5.6 10.8 12.3 12.4 10.3 5.1 -1.7 -5.7 3.1 -5.8 2.9 11.8 4.6 1964 -5.4 -3.5 -1.4 1.8 5.9 10.4 12.9 11.1 6.9 1.7 -2.3 -13.6 2 -4.9 2.1 11.5 2.1 1965 -8.2 -5.8 -5.1 2.3 5.1 10.1 13.9 13.8 6.3 4.2 -2.4 -6.2 2.3 -9.2 0.8 12.6 2.7 1966 -10.5 -3.7 -1.1 1 6.5 9.7 12.3 11.3 9.4 3.6 -2.3 -3.5 2.7 -6.8 2.1 11.1 3.6 1967 -5.6 -3.1 -2.2 0.8 6.3 12.1 12.2 13.1 9.7 4.8 -1.5 -5.7 3.4 -4.1 1.6 12.5 4.3 1968 -7.3 -5.7 0.7 1.2 6.1 10.1 13.1 12.1 8.4 3.1 -1 -9.9 2.6 -6.2 2.7 11.8 3.5 1969 -21 -8.9 -2.7 3.7 7 13 12 11.1 8.6 2.1 -0.4 -2.6 1.8 -13.3 2.7 12 3.4 1970 -9.2 -3.2 -1.4 1.1 6.5 12.3 13.8 11.7 5.5 1.2 -4.3 -8.8 2.1 -5 2.1 12.6 0.8 1971 -8.8 -4.7 -3.1 2.3 7.2 10.6 12.9 14.4 7.7 2.7 -0.2 -13.4 2.3 -7.4 2.1 12.6 3.4 1972 -16.1 -8.9 -1.8 1.2 7.5 11.5 12.5 13.1 6.4 -0.7 0.2 -8 1.4 -12.8 2.3 12.4 2 1973 -8.3 -5.3 0.1 2.2 7.5 10.6 12.7 12 9.4 4 -4 -1.8 3.3 -7.2 3.3 11.8 3.1 1974 -7.9 -1.2 -0.4 3.8 5.7 11.4 12 13.2 8.6 2.7 -0.8 -3 3.7 -3.6 3 12.2 3.5 1975 -10.3 -12.9 -2.9 0.5 6.1 10.1 14.7 12.1 7.3 4.1 -1.7 -5.1 1.8 -8.7 1.2 12.3 3.2 1976 -5.7 -3.1 -2.9 2.3 6.9 9.6 12.5 12.6 8.8 2.9 -0.2 -2 3.5 -4.6 2.1 11.6 3.8 1977 -6.9 -1.3 -0.8 2.3 7.1 11.6 13 14.1 7.3 2.4 -3.2 -10.1 3 -3.4 2.9 12.9 2.2 1978 -8.6 -4.3 -0.2 3.2 6.1 11.5 14.5 12.9 8.8 2.2 -4.7 -10.4 2.6 -7.7 3 13 2.1 1979 -18.4 -9.3 -2.3 0.9 6.6 10.7 14.1 14.4 9.7 4.9 -4.1 -3.6 2 -12.7 1.7 13.1 3.5 1980 -10.9 -2.2 -1.1 3.9 9.2 11.1 12.9 11.5 8.7 3.3 0.2 -6.3 3.4 -5.6 4 11.8 4.1 1981 -1.2 -2.4 -0.5 2 8.5 9 13.7 14.3 9.3 2.8 0.8 -6.9 4.1 -3.3 3.3 12.3 4.3 1982 -12.1 -5.1 -2.7 0.7 6.2 12.8 13.1 12.5 9.5 3.6 -4.4 -4.6 2.5 -8 1.4 12.8 2.9 1983 -1.9 0 0.4 2.6 7.3 11.7 12.3 13.6 6.8 2.7 1.7 -12.7 3.7 -2.2 3.4 12.5 3.7 1984 -6.7 -1.7 1 3.3 5.4 11.1 13.3 13.2 7.4 1.9 -2.6 -11 2.9 -7 3.2 12.5 2.2 1985 -6.5 -7.1 -2.3 2.6 8 11.1 14.7 12.5 6.8 3.7 -11.4 -7.8 2 -8.2 2.8 12.8 -0.3 1986 -2.6 -6.9 0.9 2.9 7.9 12.2 12.8 13.9 8.2 2.6 -2.8 -4.1 3.8 -5.8 3.9 13 2.7 1987 -4 -1.4 1 4.6 7.9 13.2 14.7 12 9.2 2.6 1.5 -4.8 4.7 -3.2 4.5 13.3 4.4 1988 -7.9 -4.6 -0.6 4.6 7.7 11.8 13.1 12.9 8.3 4.9 -0.2 -4.1 3.8 -5.8 3.9 12.6 4.3 1989 -8.1 -11.4 -1.4 3.2 7.3 11.8 13.2 12.4 8 3.4 -1.2 -3 2.9 -7.9 3 12.5 3.4 1990 -4.8 -7.6 -1.7 4.3 7.8 11.1 14.5 14.1 8.7 2.8 -2.6 -10 3.1 -5.1 3.5 13.2 3 1991 -12.7 0.1 -2.5 3.3 8.3 10.6 14 14.7 9.2 0.6 -0.8 -3 3.5 -7.5 3 13.1 3 1992 -0.5 0 0.3 4.4 8.2 14.2 14.5 12.8 7.2 4.5 -0.5 -10.9 4.5 -1.2 4.3 13.8 3.7 1993 -15.7 -7.5 -1.3 2.4 9.9 11.8 13 12.5 8.2 3.5 -4.6 -2.1 2.5 -11.4 3.7 12.4 2.4 1994 -1.2 -6.1 -0.2 5.5 8.6 10.8 15.7 13.5 10.8 3.2 -2.6 -4.5 4.5 -3.1 4.6 13.3 3.8 1995 -4.2 -2.6 -1.5 2.6 8 12.7 15.4 11.3 9.5 3.9 -1.4 -4.7 4.1 -3.8 3 13.1 4 1996 -10.9 -6.2 -2.4 4.1 6.7 10.9 14 13.2 8.7 3.4 -5 -11.4 2.1 -7.3 2.8 12.7 2.4 1997 -5.9 -3.8 -0.9 2.1 8.9 11 13.4 14.2 10.2 4.5 1 -2.3 4.4 -7 3.4 12.9 5.2 1998 -6.6 -0.1 1.3 3.2 9.9 12.9 17.1 14.5 10.5 4.5 2.1 -4.2 5.4 -3 4.8 14.8 5.7 1999 -3.2 -0.7 0 2.2 6.2 10.6 12.4 15.1 7.4 2.9 1 -2 4.3 -2.7 2.8 12.7 3.8 2000 -8.2 -4.3 0.2 3.4 6.4 10.4 13.3 12.4 8.3 3.8 -1.1 -6.8 3.2 -4.8 3.3 12 3.7 2001 -3.1 -5.9 -0.6 3.2 7.3 10.1 13.5 13.7 9.7 1.6 1.5 -3.8 3.9 -5.3 3.3 12.4 4.3 2002 -5.7 -3.6 -5.2 2.9 6.6 11.4 14.7 12.5 8.3 0.4 -0.4 -1.7 3.4 -4.4 1.4 12.9 2.8 2003 -2.1 -4.3 -0.7 4.5 7.6 11.9 14.5 13.8 9 5.2 -5.4 -3.9 4.2 -2.7 3.8 13.4 2.9 2004 -7 -3.9 1.2 4.1 8.5 12.9 15.6 15.2 8.8 3.3 0.3 -2.3 4.7 -4.9 4.6 14.6 4.1 2005 -8.5 -4 1 3.1 8.8 11.5 14.3 13.6 8.2 5.5 0.1 -5.5 4 -4.9 4.3 13.1 4.6 2006 -1 -4.5 -0.6 3.6 7.1 12.5 15.8 12.8 9.3 3 -2.4 -4.1 4.3 -3.7 3.4 13.7 3.3 2007 -7.3 -2.3 1.3 2.7 7.7 11.4 15.4 12.4 8.2 3.6 -2 -6.7 3.7 -4.6 3.9 13.1 3.3