Equatorial Indian Ocean

Data is from ERSSTv4.

Year January February March April May June July August September October November December
1870 -0.231 -0.231 -0.044 0.155 0.487 0.301 0.405 0.341 0.543 0.303 -0.121 -0.121
1871 0.249 -0.091 -0.104 0.015 0.077 -0.309 -0.175 -0.419 -0.187 -0.057 0.029 0.299
1872 0.219 0.029 -0.164 0.045 0.337 0.241 0.105 0.171 0.083 0.173 0.149 0.009
1873 -0.041 0.019 0.016 -0.155 -0.023 -0.039 -0.425 -0.619 -0.157 -0.147 -0.111 0.089
1874 0.149 0.049 -0.044 0.035 -0.123 -0.349 -0.275 -0.329 -0.597 -0.547 -0.641 -0.341
1875 -0.331 -0.351 -0.294 -0.235 -0.123 -0.129 -0.145 -0.269 -0.157 0.203 0.149 0.029
1876 -0.051 0.109 0.116 -0.075 -0.063 -0.389 -0.455 -0.579 -0.497 -0.427 -0.291 -0.121
1877 0.019 -0.001 -0.174 -0.015 -0.133 0.121 0.325 0.291 0.393 0.363 0.329 0.419
1878 0.599 0.859 0.896 0.865 0.677 0.441 0.445 0.311 -0.097 0.103 -0.021 0.279
1879 0.079 -0.001 -0.034 -0.125 -0.163 -0.149 -0.065 -0.359 -0.257 -0.487 -0.501 -0.601
1880 -0.441 -0.211 -0.154 -0.065 -0.233 -0.369 -0.515 -0.089 -0.377 -0.447 -0.321 -0.131
1881 -0.351 -0.071 -0.124 0.215 0.227 -0.069 0.075 0.161 0.063 -0.007 0.089 -0.051
1882 0.199 0.039 0.066 0.165 0.057 -0.399 -0.315 -0.479 -0.357 -0.317 -0.191 -0.251
1883 -0.081 -0.201 -0.244 -0.245 0.107 0.161 0.075 -0.149 -0.117 -0.237 -0.351 -0.381
1884 -0.391 -0.331 -0.304 -0.175 -0.033 -0.229 -0.075 -0.089 0.143 0.433 0.259 0.049
1885 -0.001 -0.201 -0.114 -0.145 -0.083 -0.329 -0.275 -0.269 -0.197 -0.097 -0.061 0.079
1886 0.019 -0.081 0.176 0.015 -0.203 -0.199 -0.205 -0.339 -0.297 -0.597 -0.191 -0.341
1887 -0.081 -0.161 -0.334 -0.465 -0.553 -0.679 -0.645 -0.279 -0.337 -0.327 -0.261 -0.291
1888 -0.431 -0.071 -0.224 -0.255 -0.173 -0.239 -0.025 0.031 -0.047 0.283 0.359 0.139
1889 -0.011 0.139 0.176 -0.085 -0.113 -0.139 -0.115 -0.289 -0.207 -0.367 -0.461 -0.341
1890 -0.601 -0.611 -0.224 -0.345 -0.483 -0.629 -0.735 -0.899 -0.917 -0.907 -0.651 -0.411
1891 -0.371 -0.401 -0.384 -0.215 -0.023 -0.279 -0.245 -0.319 -0.297 -0.397 -0.301 -0.081
1892 -0.151 -0.211 -0.414 -0.355 -0.133 0.001 -0.355 -0.549 -0.487 -0.647 -0.461 -0.431
1893 -0.461 -0.341 -0.224 -0.425 -0.673 -0.639 -0.535 -0.629 -0.707 -0.447 -0.401 -0.531
1894 -0.351 -0.301 -0.254 -0.285 -0.483 -0.429 -0.465 -0.479 -0.397 -0.347 -0.311 -0.471
1895 -0.451 -0.421 -0.384 -0.015 -0.233 -0.249 -0.385 -0.179 -0.237 -0.127 -0.041 -0.191
1896 -0.241 -0.101 -0.044 -0.095 -0.013 -0.059 -0.095 -0.039 -0.177 -0.097 0.109 0.319
1897 0.409 0.449 0.326 0.165 0.077 -0.069 0.255 0.411 0.173 0.073 -0.181 -0.061
1898 -0.341 -0.371 -0.354 -0.315 -0.213 -0.159 -0.195 -0.419 -0.287 -0.357 -0.501 -0.521
1899 -0.611 -0.501 -0.494 -0.625 -0.583 -0.709 -0.665 -0.609 -0.717 -0.677 -0.531 -0.331
1900 -0.441 -0.211 -0.154 -0.065 -0.233 -0.369 -0.515 -0.089 -0.377 -0.447 -0.321 -0.131
1901 0.009 -0.201 -0.094 -0.065 -0.323 -0.529 -0.615 -0.369 -0.577 -0.487 -0.451 -0.511
1902 -0.681 -0.711 -0.674 -0.525 -0.393 -0.149 -0.055 -0.079 -0.097 -0.117 -0.021 -0.091
1903 -0.171 -0.211 -0.244 -0.395 -0.313 -0.089 -0.205 -0.249 -0.397 -0.487 -0.511 -0.651
1904 -0.661 -0.711 -0.684 -0.745 -0.683 -0.689 -0.635 -0.679 -0.567 -0.407 -0.411 -0.431
1905 -0.311 -0.241 -0.244 -0.575 -0.613 -0.429 -0.435 -0.349 -0.307 -0.257 -0.121 -0.091
1906 -0.191 0.219 -0.094 -0.275 -0.223 -0.069 -0.245 -0.409 -0.607 -0.577 -0.471 -0.451
1907 -0.381 -0.551 -0.554 -0.365 -0.503 -0.579 -0.555 -0.679 -0.507 -0.347 -0.361 -0.281
1908 -0.291 -0.451 -0.504 -0.485 -0.453 -0.389 -0.425 -0.399 -0.497 -0.467 -0.401 -0.471
1909 -0.461 -0.521 -0.354 -0.405 -0.523 -0.659 -0.635 -0.669 -0.487 -0.497 -0.411 -0.291
1910 -0.241 -0.401 -0.404 -0.535 -0.473 -0.519 -0.505 -0.559 -0.637 -0.637 -0.711 -0.541
1911 -0.311 -0.391 -0.334 -0.585 -0.443 -0.539 -0.605 -0.479 -0.487 -0.387 -0.191 -0.331
1912 -0.321 -0.131 -0.174 -0.065 -0.083 0.021 -0.175 -0.179 -0.107 -0.197 -0.331 -0.321
1913 -0.301 -0.111 -0.344 -0.435 -0.263 -0.299 -0.415 -0.449 -0.397 -0.237 -0.131 -0.131
1914 -0.151 -0.021 -0.124 -0.175 -0.173 0.141 0.145 -0.019 -0.097 0.003 0.019 -0.091
1915 -0.151 -0.131 -0.094 0.245 0.127 0.151 0.005 -0.109 -0.037 0.023 0.009 -0.071
1916 -0.131 -0.351 -0.254 -0.125 -0.173 -0.249 -0.165 -0.239 -0.257 -0.447 -0.551 -0.521
1917 -0.391 -0.521 -0.794 -0.725 -0.433 -0.219 -0.165 -0.149 -0.157 -0.427 -0.641 -0.491
1918 -0.491 -0.581 -0.484 -0.465 -0.403 -0.349 -0.205 -0.239 -0.227 -0.077 0.159 0.149
1919 0.279 0.249 -0.054 0.145 0.077 -0.229 -0.215 -0.209 -0.037 -0.097 -0.331 -0.351
1920 0.119 0.209 0.196 -0.205 -0.553 -0.519 -0.665 -0.579 -0.377 -0.297 -0.231 -0.301
1921 -0.241 -0.331 -0.254 -0.265 -0.343 -0.299 -0.315 -0.349 -0.297 -0.227 -0.281 -0.151
1922 -0.181 -0.161 -0.234 -0.405 -0.443 -0.239 -0.245 -0.219 -0.397 -0.207 -0.191 -0.341
1923 -0.351 -0.361 -0.314 -0.095 -0.243 -0.419 -0.395 -0.299 -0.327 -0.137 -0.111 -0.091
1924 -0.051 -0.001 -0.044 -0.145 -0.323 -0.299 -0.255 -0.259 -0.197 -0.197 -0.481 -0.301
1925 -0.511 -0.651 -0.554 -0.415 -0.343 -0.369 -0.125 -0.239 -0.067 -0.027 0.079 -0.041
1926 0.069 -0.031 0.146 0.015 0.067 0.141 0.095 0.011 0.033 0.103 -0.001 -0.071
1927 -0.271 0.039 -0.324 -0.225 -0.473 -0.359 -0.285 -0.309 -0.237 -0.237 -0.191 -0.031
1928 0.079 0.169 -0.084 -0.265 -0.143 -0.149 -0.365 -0.219 -0.267 -0.397 -0.191 -0.261
1929 -0.171 -0.261 -0.374 -0.325 -0.473 -0.469 -0.295 -0.389 -0.287 -0.227 -0.191 -0.001
1930 -0.031 -0.021 -0.154 -0.015 -0.313 -0.289 -0.275 -0.279 -0.297 -0.267 -0.121 -0.111
1931 -0.091 0.129 0.086 0.105 0.107 0.031 0.005 -0.089 -0.047 -0.097 -0.031 -0.171
1932 -0.351 -0.431 -0.194 -0.285 -0.253 -0.329 -0.375 -0.179 -0.257 -0.317 -0.301 -0.251
1933 -0.101 -0.141 -0.234 -0.365 -0.353 -0.279 -0.315 -0.329 -0.327 -0.427 -0.411 -0.531
1934 -0.771 -0.721 -0.754 -0.655 -0.623 -0.319 -0.255 -0.089 -0.157 -0.337 -0.321 -0.131
1935 -0.261 -0.151 -0.294 -0.265 -0.123 -0.179 -0.315 -0.249 -0.207 -0.267 -0.101 -0.061
1936 -0.031 0.039 -0.014 -0.115 -0.283 -0.109 -0.105 0.071 0.063 0.083 -0.031 0.069
1937 0.039 0.169 0.016 -0.125 -0.153 -0.159 -0.185 -0.039 -0.007 -0.007 -0.011 -0.221
1938 -0.031 0.009 -0.064 -0.305 -0.223 -0.279 -0.395 -0.299 -0.357 -0.337 -0.371 -0.331
1939 -0.351 -0.311 -0.314 -0.445 -0.353 -0.249 -0.245 -0.199 -0.047 -0.117 -0.131 -0.011
1940 -0.091 -0.111 0.086 0.205 0.217 0.071 0.105 0.081 0.163 0.233 0.079 0.129
1941 0.159 0.359 0.486 0.395 0.537 0.531 0.625 0.691 0.553 0.713 0.679 0.449
1942 0.369 0.519 0.546 0.425 0.567 0.461 0.255 0.131 0.033 0.143 0.059 0.129
1943 0.299 0.259 0.106 -0.145 0.107 -0.009 -0.135 -0.109 -0.077 0.123 0.309 0.229
1944 0.139 0.079 0.206 0.315 0.267 0.411 0.385 0.531 0.473 0.363 0.529 0.699
1945 0.669 0.599 0.176 0.235 0.237 0.571 0.645 0.501 0.703 0.413 0.359 0.249
1946 0.029 0.029 0.096 0.245 0.097 0.061 -0.015 -0.049 -0.087 -0.067 -0.151 -0.211
1947 -0.031 -0.111 -0.154 -0.185 0.007 -0.049 -0.105 -0.239 -0.327 -0.507 -0.421 -0.301
1948 -0.191 -0.151 -0.164 -0.245 -0.223 -0.049 -0.155 -0.159 -0.237 -0.077 -0.131 -0.001
1949 -0.281 -0.271 -0.214 -0.275 -0.263 -0.099 0.015 -0.079 -0.147 -0.117 -0.231 -0.371
1950 -0.241 -0.211 -0.224 -0.315 -0.233 -0.349 -0.335 -0.279 -0.367 -0.317 -0.421 -0.521
1951 -0.461 -0.441 -0.234 -0.445 -0.113 -0.149 -0.225 -0.099 0.023 0.123 0.049 0.129
1952 -0.161 -0.051 0.046 -0.015 -0.023 -0.169 -0.315 -0.279 -0.187 -0.427 -0.401 -0.231
1953 -0.141 -0.191 -0.004 -0.005 0.047 -0.029 -0.115 -0.119 -0.217 -0.237 -0.091 0.039
1954 -0.091 -0.041 -0.134 -0.165 -0.143 -0.189 -0.355 -0.369 -0.437 -0.597 -0.521 -0.421
1955 -0.171 -0.381 -0.314 -0.395 -0.603 -0.689 -0.445 -0.289 -0.197 -0.337 -0.421 -0.381
1956 -0.331 -0.381 -0.194 -0.265 -0.563 -0.479 -0.505 -0.419 -0.437 -0.457 -0.331 -0.261
1957 -0.181 -0.161 -0.084 0.085 0.307 0.021 -0.025 -0.139 -0.187 -0.027 0.059 -0.021
1958 0.229 0.139 0.006 0.185 0.037 0.061 0.125 0.111 0.093 0.023 -0.031 0.079
1959 0.309 0.299 0.166 0.045 0.177 -0.019 -0.175 0.011 0.073 -0.017 0.009 0.019
1960 0.009 -0.081 0.106 0.045 0.007 -0.099 -0.085 -0.119 -0.157 -0.117 -0.311 0.009
1961 0.019 -0.141 -0.114 -0.085 -0.193 -0.029 0.145 0.081 0.053 0.033 -0.141 -0.011
1962 -0.121 -0.141 -0.054 0.025 -0.053 0.001 0.165 0.261 0.183 0.063 -0.011 0.079
1963 0.059 -0.201 -0.204 -0.025 0.037 0.091 0.155 0.161 0.083 0.143 0.229 0.189
1964 0.449 0.419 0.276 0.315 -0.123 -0.049 -0.155 -0.129 -0.127 -0.147 -0.401 -0.271
1965 -0.311 -0.251 -0.334 -0.075 -0.363 -0.309 -0.085 -0.099 0.003 0.153 0.099 0.049
1966 0.159 0.319 0.106 -0.005 -0.113 0.081 0.165 0.021 0.143 0.143 0.019 -0.091
1967 -0.281 -0.371 -0.154 -0.045 0.097 0.141 0.045 0.011 0.003 0.133 0.039 0.009
1968 -0.221 -0.111 -0.274 -0.205 -0.143 0.001 -0.045 0.051 0.023 0.173 0.099 0.079
1969 0.269 0.319 0.386 0.445 0.347 0.031 0.035 0.181 0.123 0.323 0.259 0.279
1970 0.509 0.399 0.466 0.465 0.337 0.181 0.305 0.311 0.213 0.093 0.009 -0.191
1971 -0.121 -0.351 -0.254 -0.005 -0.003 0.011 0.015 0.031 -0.037 -0.137 -0.091 -0.121
1972 0.089 0.009 -0.174 -0.015 0.227 0.461 0.385 0.441 0.513 0.523 0.619 0.639
1973 0.569 0.509 0.496 0.485 0.217 0.211 0.285 0.211 0.423 0.333 0.139 -0.161
1974 -0.351 -0.441 -0.334 -0.275 -0.103 0.121 0.165 0.091 -0.027 -0.087 -0.171 -0.051
1975 -0.171 -0.081 -0.194 -0.175 -0.013 0.071 0.305 0.071 -0.027 -0.257 -0.351 -0.381
1976 -0.411 -0.221 -0.294 -0.205 -0.103 0.211 0.225 0.161 0.103 0.153 0.059 0.059
1977 0.139 -0.021 0.036 0.145 0.107 0.381 0.295 0.361 0.363 0.293 0.339 0.379
1978 0.379 0.419 0.316 0.335 -0.073 -0.109 -0.045 -0.029 0.013 0.053 0.079 0.169
1979 0.479 0.489 0.446 0.395 0.247 0.401 0.165 0.121 0.163 0.173 0.139 0.319
1980 0.289 0.119 0.156 0.255 0.617 0.331 0.345 0.401 0.353 0.383 0.429 0.269
1981 -0.441 -0.211 -0.154 -0.065 -0.233 -0.369 -0.515 -0.089 -0.377 -0.447 -0.321 -0.131
1982 0.199 0.139 0.156 0.305 0.427 0.411 0.365 0.511 0.543 0.653 0.649 0.619
1983 0.459 0.609 0.616 0.675 0.707 0.881 0.795 0.801 0.623 0.333 0.309 0.249
1984 0.039 -0.191 0.026 0.125 -0.043 -0.039 -0.035 -0.059 0.063 0.073 0.239 0.049
1985 0.209 0.099 0.096 0.205 0.087 -0.159 0.135 0.061 0.153 -0.017 0.039 0.109
1986 -0.071 0.119 -0.054 0.125 0.217 0.341 0.255 0.041 0.033 0.163 0.429 0.409
1987 0.279 0.279 0.546 0.565 0.797 0.601 0.705 0.781 0.953 0.793 0.709 0.589
1988 0.719 0.819 0.796 0.715 0.387 0.441 0.495 0.721 0.683 0.653 0.429 0.439
1989 0.139 0.049 0.126 0.055 0.117 0.041 0.195 0.181 0.403 0.313 0.439 0.459
1990 0.409 0.669 0.526 0.475 0.477 0.261 0.475 0.421 0.443 0.433 0.429 0.549
1991 0.629 0.499 0.506 0.605 0.757 0.631 0.625 0.521 0.533 0.513 0.369 0.259
1992 0.349 0.309 0.316 0.395 0.627 0.571 0.625 0.281 0.233 0.303 0.329 0.049
1993 0.149 0.159 0.186 0.265 0.547 0.491 0.365 0.231 0.273 0.273 0.389 0.239
1994 0.369 0.229 0.056 0.205 0.337 0.181 0.225 0.261 0.123 0.403 0.309 0.349
1995 0.349 0.349 0.286 0.325 0.477 0.511 0.555 0.411 0.363 0.463 0.239 0.219
1996 0.349 0.349 0.406 0.305 0.297 0.351 0.245 0.211 0.233 0.073 0.239 0.249
1997 0.239 -0.021 0.336 0.355 0.357 0.651 0.495 0.571 0.613 0.623 0.649 0.749
1998 0.989 1.099 1.066 1.075 1.067 0.901 0.725 0.601 0.513 0.553 0.319 0.359
1999 0.249 0.309 0.446 0.195 0.107 0.291 0.465 0.451 0.513 0.303 0.379 0.399
2000 0.289 0.119 0.156 0.255 0.617 0.331 0.345 0.401 0.353 0.383 0.429 0.269
2001 0.309 0.309 0.456 0.485 0.627 0.541 0.545 0.571 0.613 0.493 0.499 0.679
2002 0.649 0.549 0.656 0.615 0.497 0.531 0.645 0.591 0.833 0.703 0.669 0.779
2003 0.739 0.789 0.666 0.775 0.757 0.761 0.755 0.631 0.783 0.633 0.469 0.389
2004 0.649 0.579 0.426 0.585 0.287 0.311 0.425 0.651 0.563 0.693 0.669 0.609
2005 0.549 0.659 0.746 0.695 0.787 0.751 0.535 0.661 0.603 0.553 0.409 0.349
2006 0.319 0.369 0.436 0.405 0.577 0.571 0.495 0.661 0.603 0.643 0.769 0.749
2007 0.699 0.669 0.616 0.665 0.737 0.791 0.735 0.781 0.673 0.563 0.429 0.419
2008 0.589 0.299 0.086 0.095 0.207 0.471 0.555 0.671 0.803 0.783 0.609 0.449
2009 0.439 0.559 0.606 0.615 0.747 0.921 0.815 0.871 0.753 0.863 0.819 0.839
2010 1.009 1.079 1.126 1.065 1.007 0.891 0.875 0.691 0.633 0.613 0.549 0.469
2011 0.289 0.329 0.366 0.355 0.517 0.681 0.715 0.781 0.793 0.863 0.949 0.809
2012 0.649 0.519 0.386 0.605 0.657 0.701 0.685 0.871 0.883 0.913 0.829 0.819
2013 0.819 0.779 0.766 0.635 0.517 0.461 0.495 0.531 0.533 0.663 0.829 0.529
2014 0.529 0.489 0.576 0.665 0.877 0.861 0.715 0.741 0.773 0.943 0.869 0.819
2015 0.619 0.619 0.796 0.815 1.007 1.041 1.135 1.311 1.303 1.463 1.289 1.329
2016 1.369 1.159 1.376 1.365 1.197 0.811 0.775 0.871 0.643 0.583 0.729

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