Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Winter Spring Summer Autumn 1895 -12.4 -12.4 -5.8 -1.6 1.9 5.8 8.3 6.5 1.3 0 -4.9 -8.1 -1.8 -9999.9 -1.8 6.9 -1.2 1896 -12.6 -13.5 -8.4 -1.4 1 5.7 8.4 7.4 3.5 0.3 -4.8 -8.7 -1.9 -11.4 -2.9 7.2 -0.3 1897 -16.4 -13.6 -8.6 -0.9 2.5 5.8 8.5 8.4 4 0.4 -4.6 -8.5 -1.9 -12.9 -2.3 7.6 -0.1 1898 -13.9 -13.5 -8.6 -1.4 2.9 5 7.2 8.7 3.7 -2 -8.4 -12.1 -2.7 -12 -2.4 7 -2.2 1899 -11.2 -15.7 -13.2 -3.8 0.1 5.9 9.1 7.8 4.4 -0.8 -0.7 -7.8 -2.2 -13 -5.6 7.6 1 1900 -8.7 -12.7 -8.9 -1.3 2.2 5 7.9 6.9 2.6 -0.5 -6.7 -4 -1.5 -9.7 -2.7 6.6 -1.5 1901 -13.2 -13.3 -4.2 -2.1 3.4 5.6 7.7 4.6 2.3 0.3 -3.9 -8.7 -1.8 -10.2 -1 6 -0.4 1902 -14.3 -13.6 -8.6 -1.6 2.5 5.8 8.5 6.8 3.3 2 -8.4 -10.7 -2.4 -12.2 -2.6 7 -1 1903 -12 -8.5 -8.6 -1.8 2.5 5.8 8.8 9.1 3.1 1.2 -6.7 -6.1 -1.1 -10.4 -2.6 7.9 -0.8 1904 -12.1 -19 -15.5 -0.5 1.6 6.4 7.5 5.6 3.6 1.5 -1.2 -8.9 -2.6 -12.4 -4.8 6.5 1.3 1905 -13.3 -15.2 -2.5 -1.3 2.2 6.6 9.4 8.1 3.5 -1.5 -3.6 -6.8 -1.2 -12.5 -0.5 8 -0.5 1906 -13.6 -10.1 -6.1 0.1 3.9 5.5 9.8 7.9 4.4 2.5 -3.9 -13.1 -1.1 -10.2 -0.7 7.7 1 1907 -28.7 -14 -9.9 -3.2 3.4 6.5 8.9 7.5 4.8 0.8 -2.4 -7.4 -2.8 -18.6 -3.2 7.6 1.1 1908 -12.3 -13 -8.6 -2.5 2.8 5.4 8.8 6 2.5 -1.5 -3.2 -12.7 -2.4 -10.9 -2.8 6.7 -0.7 1909 -26 -15.6 -6.3 -4.4 0.6 6.6 7.2 6.6 4 0.3 -11.2 -16.3 -4.5 -18.1 -3.4 6.8 -2.3 1910 -14.2 -16.6 -5.1 -2.9 2.2 5.5 6.9 6 1.7 -2.1 -5.7 -9.5 -2.8 -15.7 -1.9 6.1 -2 1911 -21.6 -19.6 -6.8 -5.2 2 4.4 7.2 7.4 4.8 -0.8 -10.9 -9.9 -4.1 -16.9 -3.3 6.3 -2.3 1912 -17.9 -9.1 -14 -1 3.4 6.4 8 8.6 3.5 -0.8 -4.5 -9.3 -2.2 -12.3 -3.9 7.7 -0.6 1913 -18.2 -15.5 -10.8 -2 3.2 8 8 8.3 3.9 -0.1 -3.8 -4.4 -2 -14.3 -3.2 8.1 0 1914 -10.1 -10.6 -4.6 -0.2 2.4 7.9 9.3 7 4.7 1.7 -3.9 -13.7 -0.8 -8.4 -0.8 8.1 0.8 1915 -12.6 -8.3 -2.8 1.1 4.5 7.9 10.4 9.3 4.4 1.3 -8.8 -9.5 -0.3 -11.5 0.9 9.2 -1 1916 -30.2 -16.5 -5.3 -0.6 3 6.8 9 7.4 3.7 -0.8 -8.3 -15.1 -3.9 -18.7 -1 7.7 -1.8 1917 -17.1 -18.1 -8.8 -2.7 3.8 6.4 8.1 8.8 3.3 0.8 0 -16.9 -2.7 -16.8 -2.6 7.8 1.4 1918 -10 -12.1 -6.9 -2.2 2.2 6.6 9.2 8.9 4 0.4 -4 -9 -1.1 -13 -2.3 8.2 0.1 1919 -9.8 -13.8 -11.9 -1 2.6 5.9 9.5 8.8 3.9 -2.6 -9.5 -14.7 -2.7 -10.9 -3.4 8.1 -2.7 1920 -16.4 -15 -7 -4.7 -0.2 5.1 8.8 6.7 3.6 -1.3 -4.5 -9.1 -2.8 -15.4 -4 6.9 -0.7 1921 -13.8 -10.6 -8.2 -1.7 2.5 6 7 7.3 3.7 0.1 -8.1 -16.6 -2.7 -11.2 -2.5 6.8 -1.4 1922 -15.9 -24.5 -8.2 -3.1 1.9 4.5 3.8 7.4 5.8 0.1 -3.3 -12.8 -3.7 -19 -3.1 5.2 0.9 1923 -16.6 -14 -8 -3.2 3.2 8 8.1 9.5 3.4 -1.6 -3.5 -9.1 -2 -14.5 -2.7 8.5 -0.6 1924 -13.7 -7.3 -6.2 -1.8 2.5 6.8 8.9 8.1 5.6 2.3 -7 -17.4 -1.6 -10 -1.8 7.9 0.3 1925 -13.6 -13.2 -5.9 -2.5 2.2 6.1 7.9 7.7 3.6 -3.7 -4 -2.3 -1.5 -14.7 -2.1 7.2 -1.4 1926 -7.2 -5 -3.4 -0.3 2.5 7.2 8.3 7.3 -0.3 0.1 -5.9 -11.5 -0.7 -4.8 -0.4 7.6 -2 1927 -14.7 -13.4 -6 -2.9 1.6 8.2 9.3 7.7 4.2 0.1 -13 -21.1 -3.3 -13.2 -2.4 8.4 -2.9 1928 -15.7 -11.7 -7.4 -1.6 4 8.6 9.5 7 1.9 -1.6 -4.6 -10.4 -1.8 -16.2 -1.7 8.4 -1.4 1929 -16.5 -20.9 -4 -3.4 2.3 7.5 8 7.2 4.1 0 -4.1 -12 -2.7 -15.9 -1.7 7.6 0 1930 -27 -9.4 -8.7 -0.3 1.7 6.3 7.8 8.1 3.2 -1.4 -5.4 -4.7 -2.5 -16.1 -2.4 7.4 -1.2 1931 -7.6 -8.5 -6.9 -1.3 2.8 6.6 7.9 7.4 4.5 0.1 -9.9 -11.7 -1.4 -6.9 -1.8 7.3 -1.8 1932 -14.5 -14.7 -8 -0.1 1.7 5.8 7.6 8.8 4.1 -0.2 -4.7 -14 -2.4 -13.6 -2.1 7.4 -0.3 1933 -13.2 -14.4 -10.4 -3 2.8 5.1 6.8 6.9 3.2 -2.1 0.1 -18.4 -3.1 -13.9 -3.5 6.3 0.4 1934 -9.8 -9.6 -5.3 0.2 3.7 6.1 8.1 7.9 3.6 0.5 -2.8 -12 -0.8 -12.6 -0.5 7.4 0.4 1935 -18.8 -7.7 -10.3 -5.6 1.4 6.9 9.4 6.9 3.1 -2.6 -8.6 -5.1 -2.6 -12.8 -4.8 7.7 -2.7 1936 -13.3 -27.2 -7.9 -2.2 5.5 7.8 9.3 8.6 3.6 1.1 -5 -12.4 -2.7 -15.2 -1.5 8.6 -0.1 1937 -22.9 -16.9 -4.6 -0.3 2.2 7.4 8.4 7.7 4.8 1.3 -6.5 -10.4 -2.5 -17.4 -0.9 7.8 -0.1 1938 -10.9 -13 -4.6 -1.1 1.5 6.7 8.6 7.2 6.7 1.1 -6.7 -11.1 -1.3 -11.4 -1.4 7.5 0.4 1939 -10 -15.6 -9.2 -1.2 3.2 7 8.8 6.5 4.4 -0.1 -0.5 -2.8 -0.8 -12.2 -2.4 7.4 1.3 1940 -11.2 -8.7 -1.6 0.9 3.6 6.4 9.9 9 7.1 0.7 -8.8 -6.8 0 -7.6 1 8.4 -0.3 1941 -8 -9 -3.2 0.1 3.9 9.3 10.4 8.9 5.1 2 -3.1 -8.3 0.7 -7.9 0.3 9.5 1.3 1942 -8.7 -9 -5.6 -1.2 4.3 7.3 10.7 8.6 5.4 0.5 -7.4 -9.4 -0.4 -8.7 -0.8 8.9 -0.5 1943 -18.7 -10.3 -10.2 -1.6 1.1 6.6 9.2 8.9 3.6 0.2 -3.8 -8.8 -2 -12.8 -3.6 8.2 0 1944 -9.8 -8.8 -8.6 -1 3.3 7 9.5 9.5 6.6 1.3 -2.4 -12.3 -0.5 -9.1 -2.1 8.7 1.8 1945 -10.3 -9.4 -5.1 -2.4 2.8 7 8.5 8.4 3.7 0.6 -9.7 -8.2 -1.2 -10.7 -1.6 8 -1.8 1946 -10.4 -9.6 -3.8 -1.4 2.5 7.8 8.5 6.8 3.3 -1.5 -10.4 -12.3 -1.7 -9.4 -0.9 7.7 -2.9 1947 -14.2 -10.6 -6.1 0.5 2.5 6.9 9 6.9 3.7 1 -3.9 -5.7 -0.8 -12.4 -1 7.6 0.3 1948 -10.1 -16.9 -8.9 -4.5 4.1 7.9 9.1 9.2 4.8 -0.9 -4.7 -15.8 -2.2 -10.9 -3.1 8.7 -0.3 1949 -17.4 -19.1 -6.9 -0.3 3 4.5 8.5 8.1 4 0 -1.7 -15 -2.7 -17.4 -1.4 7 0.8 1950 -33 -8.8 -7.7 -2.6 1.5 6.6 8 7.8 3.5 -1.6 -10.4 -9.8 -3.9 -18.9 -2.9 7.5 -2.8 1951 -19.6 -14.3 -10.7 -2.8 4 5.1 9.1 6.5 1.9 -1.5 -6.2 -15.9 -3.7 -14.6 -3.2 6.9 -1.9 1952 -18.6 -11.1 -7.5 -1.5 2.3 6.6 7.4 7 5.4 1.3 -4.4 -7 -1.7 -15.2 -2.2 7 0.8 1953 -16.4 -8.9 -4.8 -2.4 3.7 7.3 8.1 8.3 3.6 1.8 -0.9 -7.7 -0.7 -10.8 -1.2 7.9 1.5 1954 -21.4 -6.8 -8.1 -5.5 2.5 5.5 7 9.3 5.2 -1.3 0.7 -6.9 -1.7 -12 -3.7 7.3 1.5 1955 -11 -13.3 -12.6 -2.8 1.5 6.9 9.6 7.3 3.2 -0.2 -16.5 -19.7 -4 -10.4 -4.6 7.9 -4.5 1956 -19.4 -17.3 -8 -2.5 1.2 7.6 8.8 8.5 3.3 -1.6 -5.5 -11.1 -3 -18.8 -3.1 8.3 -1.3 1957 -25.5 -17.2 -6.3 -0.6 4.8 7.5 8.7 7.7 5.5 -2.7 -3.1 -8.8 -2.5 -17.9 -0.7 8 -0.1 1958 -5 -9.7 -6.5 -2.3 2.8 9.2 9.7 8.7 4.4 1.1 -8.7 -7.7 -0.3 -7.8 -2 9.2 -1.1 1959 -13.4 -15.3 -2.8 -1.9 3 6.5 8.5 7.4 6.3 1.4 -8.3 -5 -1.1 -12.1 -0.6 7.5 -0.2 1960 -13.5 -7.4 -6.9 -0.5 2 6.7 8.5 8.4 3.1 3.3 -5.4 -9.2 -0.9 -8.6 -1.8 7.9 0.3 1961 -7.8 -6.7 -4 -0.7 4.5 8.1 9.6 7.9 2.5 0.8 -9.7 -13.2 -0.7 -7.9 -0.1 8.5 -2.1 1962 -14 -12.4 -9.3 -0.2 2.7 5.6 8.7 9 4.5 1.9 -2.1 -6.9 -1 -13.2 -2.3 7.8 1.4 1963 -16.1 -4.5 -3.7 -0.5 1.7 5.9 9.5 9.2 9.2 1.9 -5.5 -8.6 -0.1 -9.2 -0.8 8.2 1.9 1964 -8.5 -5.8 -7.1 -2.1 2.3 8.2 9.1 8 3.7 0.6 -7.5 -18.5 -1.5 -7.6 -2.3 8.4 -1.1 1965 -13.9 -9.5 -11 -1.2 1.9 5 9.5 10.2 2.4 1.3 -6.6 -10.8 -1.9 -14 -3.4 8.2 -1 1966 -17.4 -8.9 -4.6 -3.2 3.3 5.4 9.3 8.2 5.5 -0.2 -8.8 -9.3 -1.7 -12.4 -1.5 7.6 -1.2 1967 -12.9 -6.6 -7.9 -2.2 2.8 6.4 8.3 8.6 5.6 1.5 -4.6 -12.5 -1.1 -9.6 -2.4 7.8 0.8 1968 -13.2 -12 -2.1 -1.3 2.1 5.7 8.9 7.7 4.7 0 -4.2 -16.8 -1.7 -12.6 -0.4 7.4 0.2 1969 -28.3 -12.8 -5 1.4 3.6 9.4 8.5 7.7 6.3 -0.8 0.2 -5.1 -1.2 -19.3 0 8.5 1.9 1970 -15.5 -6.4 -4.9 -1.8 2.5 7.3 8.4 8 3.4 -0.5 -9.9 -16.4 -2.2 -9 -1.4 7.9 -2.3 1971 -16 -10.6 -7.1 -1.4 2.8 7.9 8.9 9.6 3.4 -1.4 -3.2 -19.1 -2.2 -14.3 -1.9 8.8 -0.4 1972 -23.4 -13.1 -4.2 -2.5 3 7.2 8.1 8.3 2.9 -2.3 -3.4 -13.6 -2.8 -18.5 -1.2 7.9 -0.9 1973 -13.2 -10 -2.9 -1.5 3 6 7.2 5.5 4.3 -0.7 -10.4 -7.2 -1.7 -12.3 -0.5 6.2 -2.3 1974 -18.1 -7.6 -6.3 -0.5 2.3 5.2 7.2 7 4.4 0.6 -5 -7.6 -1.5 -11 -1.5 6.5 0 1975 -15.1 -18.1 -8.2 -3.4 1.8 6.7 10.8 8.6 4.3 1.2 -5.4 -10 -2.2 -13.6 -3.3 8.7 0 1976 -11 -9.4 -7.1 -2.1 3.5 5.5 8.4 10.5 5.7 0.1 -3.1 -6.2 -0.4 -10.1 -1.9 8.1 0.9 1977 -11.5 -4.2 -3.9 -0.6 2.6 6.2 8.2 9.3 4.4 0.2 -7.7 -16.7 -1.1 -7.3 -0.6 7.9 -1 1978 -14.7 -8.7 -4.8 -0.3 2.5 7.1 10 8.4 4.9 0.1 -8.9 -16 -1.7 -13.4 -0.9 8.5 -1.3 1979 -22.7 -16.8 -4.4 -2 3.6 6.3 9.5 8.4 6.4 1.8 -5.8 -9 -2.1 -18.5 -0.9 8.1 0.8 1980 -17.2 -7.8 -5.6 -0.5 5.4 8.3 9.2 8 6.1 0.6 -2.1 -11.3 -0.6 -11.3 -0.2 8.5 1.5 1981 -4.8 -5.7 -3.9 -1.2 5.1 6.1 9.9 9.1 6 0 -1.9 -12.3 0.5 -7.3 0 8.4 1.4 1982 -20.1 -15.5 -8.3 -3.8 2.6 8.1 11.1 9 7.5 1.1 -7.9 -8.9 -2.1 -16 -3.2 9.4 0.2 1983 -7.7 -4.1 -4.2 -1.7 4.1 9 9.7 8.2 3.2 -0.2 -2.1 -19.4 -0.4 -6.9 -0.6 9 0.3 1984 -7.4 -3 -2.9 -0.6 2.2 7.1 8.6 8.9 2.9 -2.5 -7.7 -17 -1 -9.9 -0.4 8.2 -2.4 1985 -8.9 -9.5 -5.1 -2 4.1 6.5 8.1 7.9 2.6 0.5 -17.4 -10.5 -2 -11.8 -1 7.5 -4.8 1986 -5.2 -11.8 -1.6 -1.1 4 6.5 9.7 8 3.2 0.3 -6.8 -8.2 -0.3 -9.2 0.4 8.1 -1.1 1987 -6.9 -3.6 -3.3 0.2 3.8 7.5 10.6 7.5 4.6 -2 -1.2 -6.9 0.9 -6.2 0.2 8.5 0.5 1988 -14.6 -9.9 -3 0 3.9 7.4 8.8 8.8 3.2 0.5 -2.4 -9.2 -0.5 -10.5 0.3 8.3 0.4 1989 -12.5 -18.6 -7.7 -0.8 3.4 7.8 9.8 10.4 4 1.2 -2.8 -4.7 -0.9 -13.4 -1.7 9.3 0.8 1990 -8.4 -12.2 -5.4 -0.5 5 8.2 9.2 9.6 5 0.3 -7 -13.4 -0.8 -8.4 -0.3 9 -0.6 1991 -18.6 -1.8 -8.4 -1 3.5 8.1 9.6 10.6 5.2 -2.6 -3 -4.8 -0.3 -11.3 -2 9.4 -0.1 1992 -2.3 -4.2 -3 0.6 3.3 9.7 9.4 7.7 5.5 0.8 -2.5 -13.7 0.9 -3.8 0.3 8.9 1.3 1993 -19 -10.8 -4.5 0.2 6.3 8.1 9 8.5 1.5 1.2 -5 -5.3 -0.8 -14.5 0.7 8.5 -0.8 1994 -7.7 -13.5 -2.5 0.8 4.1 8.4 9.6 8.1 6.7 0.5 -5.9 -9.8 -0.1 -8.8 0.8 8.7 0.4 1995 -13 -7.6 -5.7 -0.6 2.6 7.9 10.3 8.2 4 1 -5.6 -13.1 -1 -10.1 -1.2 8.8 -0.2 1996 -19 -8.6 -6.1 -0.2 2 7.1 8 8.4 5.1 -0.3 -9.8 -16.9 -2.5 -13.6 -1.4 7.8 -1.7 1997 -10.7 -6.5 -5.3 -1.5 3.9 6.9 9.9 8.4 5.5 1.2 -3.2 -4.5 0.3 -11.4 -1 8.4 1.2 1998 -12.2 -3.4 -2.8 -1 5.8 8.8 11.6 8.3 5.6 2.3 -2.5 -8.4 1 -6.7 0.7 9.6 1.8 1999 -9 -5.4 -3.5 -0.4 3.4 7.5 8.6 9.6 3.7 -0.6 -2.2 -7 0.4 -7.6 -0.2 8.6 0.3 2000 -14 -10.7 -2.8 -0.3 2.4 7.1 10.5 8.2 4.7 0.8 -3.3 -11.2 -0.7 -10.6 -0.2 8.6 0.7 2001 -8.8 -13.4 -4 -1.1 3.4 6.1 9.8 9.4 4.7 -1 -3.5 -10.4 -0.7 -11.1 -0.6 8.4 0.1 2002 -9.1 -7.6 -11.8 -2.1 2.9 7.2 8.9 6.6 4.9 -0.7 -2.2 -5.4 -0.7 -9 -3.7 7.6 0.7 2003 -8.4 -8.5 -6.5 0.4 2.2 7 8.4 8.1 4.5 1.5 -7.9 -6.6 -0.5 -7.4 -1.3 7.8 -0.6 2004 -13.2 -5.9 -2.3 -1.7 3.1 7.8 9.7 10 4.8 0.7 -2.4 -8 0.2 -8.6 -0.3 9.2 1 2005 -13.9 -7.1 -2.8 0.2 4.5 8.9 9.5 8 4.4 1.8 -3.7 -8 0.2 -9.7 0.6 8.8 0.8 2006 -4.3 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9 -9999.9