| Year of Record Low Temperature in Chicago [ 30 ] | Year of Minimal Sunspot Number (Figure 1) | Year of Corresponding La Niña Event (Table 5) |
| February 23, 1873 January 2, 1879 February 8, 1899 January 7, 1912 1926 January 22, 1936 1945 January 29, 1966 January 16, 1977 January 20, 1985 January 19, 1994 February 5, 2007 January 30, 2019 | 1873 1879 1902 1912 1926 1936 1945 1966 1975 1985 1995 2007 2019 | - - - - - - - 1964-65 1974-75 1984-85 1995-96 2007-08 2017-18 |