Hurrell Station-Based Annual NAO Index 1865 -0.66 1866 -0.20 1867 -3.04 1868 4.14 1869 0.42 1870 -2.77 1871 -0.85 1872 -0.83 1873 0.17 1874 2.32 1875 -2.10 1876 -1.85 1877 -0.24 1878 -4.03 1879 -0.69 1880 -1.86 1881 -2.84 1882 2.06 1883 1.73 1884 1.38 1885 -1.40 1886 0.20 1887 -3.05 1888 -2.94 1889 2.57 1890 2.97 1891 -0.34 1892 -2.49 1893 -1.32 1894 2.28 1895 -3.41 1896 1.58 1897 0.38 1898 0.95 1899 -2.40 1900 0.22 1901 -0.78 1902 -2.61 1903 1.69 1904 1.46 1905 1.12 1906 2.29 1907 2.36 1908 2.51 1909 -0.87 1910 1.62 1911 0.99 1912 0.11 1913 2.85 1914 2.40 1915 -2.66 1916 -0.60 1917 -2.21 1918 0.45 1919 -0.47 1920 2.97 1921 2.32 1922 2.21 1923 2.43 1924 -0.02 1925 0.18 1926 -0.31 1927 -0.49 1928 1.43 1929 -0.51 1930 1.46 1931 -0.48 1932 -0.60 1933 -0.21 1934 1.91 1935 1.90 1936 -1.00 1937 -0.81 1938 3.75 1939 -0.66 1940 -1.78 1941 -2.10 1942 -0.84 1943 3.31 1944 0.71 1945 -1.69 1946 1.62 1947 -2.73 1948 0.68 1949 1.53 1950 1.10 1951 0.49 1952 -1.54 1953 1.50 1954 3.26 1955 -2.79 1956 0.54 1957 -0.51 1958 -2.12 1959 1.83 1960 -1.88 1961 0.47 1962 -1.05 1963 -2.16 1964 -1.04 1965 -1.77 1966 -2.54 1967 1.67 1968 -2.97 1969 -2.58 1970 -1.08 1971 -0.08 1972 2.05 1973 0.27 1974 2.18 1975 0.01 1976 0.59 1977 -2.08 1978 -0.42 1979 -0.23 1980 -1.58 1981 -0.55 1982 2.63 1983 0.38 1984 2.17 1985 -3.09 1986 3.14 1987 -3.01 1988 -0.13 1989 2.38 1990 3.88 1991 1.14 1992 2.54 1993 1.71 1994 2.86 1995 -1.11 1996 -1.98 1997 -0.93 1998 1.03 1999 2.25 2000 1.18 2001 -1.91 2002 1.00 2003 -0.09 2004 0.70 2005 -1.35 2006 -0.20 2007 1.35 2008 1.72 2009 0.72 2010 -5.96 2011 2.95 2012 -0.25 2013 0.90 2014 2.97 2015 4.09 2016 1.70 2017 1.14 2018 2.83 2019 0.25 2020 3.10 2021 -1.17