Jahr Temp 1800 20.8 1801 18.7 1802 22.2 1803 19.9 1804 18.4 1805 17.8 1806 18.8 1807 23.2 1808 20.5 1809 18.9 1810 18.7 1811 18.9 1812 18.9 1813 17.0 1814 17.9 1815 18.0 1816 16.6 1817 17.5 1818 18.0 1819 20.1 1820 20.1 1821 19.4 1822 19.1 1823 20.4 1824 19.0 1825 19.9 1826 22.8 1827 19.3 1828 17.7 1829 17.8 1830 19.1 1831 19.7 1832 20.5 1833 16.5 1834 21.0 1835 19.0 1836 19.9 1837 20.8 1838 17.7 1839 18.6 1840 19.7 1841 18.6 1842 22.6 1843 19.4 1844 16.1 1845 16.4 1846 22.1 1847 20.3 1848 19.3 1849 18.0 1850 18.4 1851 19.4 1852 19.5 1853 19.4 1855 19.7 1856 20.0 1857 20.5 1858 18.3 1859 21.0 1860 16.9 1861 20.3 1862 18.2 1863 20.1 1864 16.8 1865 17.8 1866 16.9 1867 19.0 1868 19.4 1869 16.9 1870 16.5 1871 18.9 1872 17.0 1873 19.1 1874 16.9 1875 19.9 1876 19.7 1877 18.9 1878 18.3 1879 19.2 1880 18.0 1881 18.2 1882 16.7 1883 17.8 1884 19.1 1885 16.7 1886 19.0 1887 18.1 1888 16.9 1889 17.5 1890 18.3 1891 17.1 1892 20.3 1893 19.5 1894 17.7 1895 17.9 1896 16.2 1897 18.7 1898 19.9 1899 19.5 1900 18.0 1901 17.8 1902 17.6 1903 17.7 1904 18.2 1905 18.8 1906 18.9 1907 18.7 1908 16.0 1909 18.5 1910 17.9 1911 21.8 1912 15.5 1913 16.9 1914 18.6 1915 17.2 1916 17.9 1917 18.0 1918 18.2 1919 18.7 1920 16.8 1921 19.1 1922 17.5 1923 18.4 1924 15.6 1925 18.1 1926 18.1 1927 17.9 1928 18.6 1929 19.3 1930 17.8 1931 17.0 1932 21.0 1933 19.6 1934 17.7 1935 19.3 1936 18.6 1937 19.1 1938 18.6 1939 18.8 1940 16.8 1941 16.7 1942 18.5 1943 20.1 1944 21.2 1946 18.3 1947 21.2 1948 17.6 1949 18.9 1950 18.4 1951 18.3 1952 20.0 1953 18.4 1954 17.4 1955 18.3 1956 16.2 1957 16.9 1958 19.2 1959 19.1 1960 17.9 1961 18.3 1962 19.5 1963 17.9 1964 18.8 1965 17.3 1966 17.3 1967 18.5 1968 17.4 1969 18.2 1970 19.1 1971 20.0 1972 17.9 1973 20.3 1974 19.5 1975 20.4 1976 18.6 1977 18.2 1978 17.1 1979 17.3 1980 19.1 1981 18.7 1982 18.8 1983 20.9 1984 19.0 1985 18.6 1986 19.0 1987 18.6 1988 19.9 1989 20.0 1990 21.2 1991 22.0 1992 22.4 1993 19.5 1994 20.3 1995 20.4 1996 19.5 1997 22.2 1998 20.3 1999 19.9 2000 20.8 2001 21.2 2002 20.0 2003 24.3 2004 20.8 2005 18.2 2006 17.3 2007 19.3