View the ice-over and ice-out dates, and duration of ice cover, for Lake Wingra dating back to 1877.
Note: The data for Lake Wingra is incomplete, especially from the late 1800s through the mid 1960s.
Annual Duration of Ice Cover
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Longest Duration
164 days
(1880-81)
Shortest Duration
63 days
(2023-24)
Average Duration
113 days
Five-Year Running Average
93 days
Freeze and Thaw Dates
| Winter | Freeze-Over Date | Thaw Date | Days of Ice Cover |
|---|---|---|---|
| 2024-25 | December 1 | March 11 | 100 |
| 2023-24 | December 13, December 19, January 5 | December 17, December 24, February 28 | 63 |
| 2022-23 | November 21, December 18 | November 28, March 20 | 99 |
| 2021-22 | December 7, December 23 | December 16, March 25 | 101 |
| 2020-21 | December 6, December 13 | December 9, March 20 | 100 |
| 2019-20 | November 12, December 11 | November 27, March 12 | 107 |
| 2018-19 | December 7 | March 28 | 111 |
| 2017-18 | December 10 | March 24 | 104 |
| 2016-17 | December 9 | February 27 | 79 |
| 2015-16 | December 30 | March 8 | 69 |
| 2014-15 | November 14 | March 21 | 127 |
| 2013-14 | November 27 | April 9 | 133 |
| 2012-13 | December 21 | April 9 | 109 |
| 2011-12 | December 11, December 17 | December 15, April 8 | 86 |
| 2010-11 | December 4 | April 1 | 118 |
| 2009-10 | December 10 | March 26 | 106 |
| 2008-09 | November 28 | March 18 | 110 |
| 2007-08 | November 30 | April 6 | 128 |
| 2006-07 | December 3, January 10 | January 4, March 25 | 106 |
| 2005-06 | November 25, December 3 | November 28, March 14 | 104 |
| 2004-05 | December 14 | April 3 | 110 |
| 2003-04 | December 9 | March 16 | 98 |
| 2002-03 | December 2 | March 24 | 112 |
| 2001-02 | December 24 | March 14 | 80 |
| 2000-01 | November 21 | April 5 | 135 |
| 1999-00 | December 18 | March 4 | 77 |
| 1998-99 | December 22 | March 11 | 79 |
| 1997-98 | December 8 | February 26 | 80 |
| 1996-97 | November 27 | March 26 | 119 |
| 1995-96 | November 12 | March 25 | 134 |
| 1994-95 | December 8 | March 17 | 99 |
| 1993-94 | November 28, December 24 | December 9, March 26 | 103 |
| 1992-93 | November 15, November 27 | November 17, April 9 | 135 |
| 1991-92 | November 5 | March 8 | 124 |
| 1990-91 | December 4 | March 23 | 109 |
| 1989-90 | November 22 | March 14 | 112 |
| 1988-89 | December 8 | March 29 | 111 |
| 1987-88 | December 5, December 16 | December 8, March 24 | 102 |
| 1986-87 | November 13 | March 8 | 115 |
| 1985-86 | November 25 | March 29 | 124 |
| 1984-85 | November 18, December 4 | November 22, March 20 | 110 |
| 1983-84 | December 9 | April 2 | 115 |
| 1982-83 | December 9 | March 6 | 87 |
| 1981-82 | November 29 | ||
| 1980-81 | December 2 | March 14 | 102 |
| 1979-80 | December 1 | April 2 | 123 |
| 1978-79 | November 26 | April 17 | 142 |
| 1977-78 | November 26 | April 6 | 131 |
| 1976-77 | March 15 | ||
| 1975-76 | December 1, December 17 | December 14, March 21 | 108 |
| 1974-75 | December 9 | April 19 | 131 |
| 1973-74 | March 30 | ||
| 1972-73 | November 30 | March 14 | 104 |
| 1971-72 | December 2 | April 16 | 136 |
| 1970-71 | December 9 | April 10 | 122 |
| 1969-70 | December 6 | April 3 | 118 |
| 1968-69 | December 7 | April 9 | 123 |
| 1967-68 | |||
| 1966-67 | |||
| 1965-66 | |||
| 1964-65 | |||
| 1963-64 | |||
| 1962-63 | |||
| 1961-62 | |||
| 1960-61 | |||
| 1959-60 | November 15 | ||
| 1958-59 | November 27 | ||
| 1957-58 | |||
| 1956-57 | |||
| 1955-56 | |||
| 1954-55 | |||
| 1953-54 | |||
| 1952-53 | November 28 | ||
| 1951-52 | |||
| 1950-51 | November 23 | April 9 | 137 |
| 1949-50 | November 25 | April 7 | 133 |
| 1948-49 | December 7 | March 27 | 110 |
| 1947-48 | March 26 | ||
| 1946-47 | |||
| 1945-46 | November 24 | March 20 | 116 |
| 1944-45 | December 2 | March 17 | 105 |
| 1943-44 | March 24 | ||
| 1942-43 | |||
| 1941-42 | |||
| 1940-41 | November 13 | ||
| 1939-40 | April 9 | ||
| 1938-39 | November 25 | March 25 | 120 |
| 1937-38 | March 21 | ||
| 1936-37 | April 10 | ||
| 1935-36 | March 24 | ||
| 1934-35 | March 25 | ||
| 1933-34 | |||
| 1932-33 | |||
| 1931-32 | |||
| 1930-31 | |||
| 1929-30 | November 17 | ||
| 1928-29 | November 29 | March 25 | 116 |
| 1927-28 | March 24 | ||
| 1926-27 | November 20 | ||
| 1925-26 | |||
| 1924-25 | |||
| 1923-24 | |||
| 1922-23 | |||
| 1921-22 | |||
| 1920-21 | |||
| 1919-20 | |||
| 1918-19 | |||
| 1917-18 | |||
| 1916-17 | November 27 | ||
| 1915-16 | March 20 | ||
| 1914-15 | November 29 | ||
| 1913-14 | November 2 | ||
| 1912-13 | |||
| 1911-12 | |||
| 1910-11 | November 13 | ||
| 1909-10 | |||
| 1908-09 | |||
| 1907-08 | |||
| 1906-07 | |||
| 1905-06 | |||
| 1904-05 | |||
| 1903-04 | |||
| 1902-03 | |||
| 1901-02 | |||
| 1900-01 | |||
| 1899-00 | |||
| 1898-99 | |||
| 1897-98 | |||
| 1896-97 | |||
| 1895-96 | March 30 | ||
| 1894-95 | November 15 | ||
| 1893-94 | November 17 | March 10 | 113 |
| 1892-93 | November 18 | April 5 | 138 |
| 1891-92 | April 2 | ||
| 1890-91 | December 4 | ||
| 1889-90 | March 24 | ||
| 1888-89 | December 12 | March 24 | 102 |
| 1887-88 | November 20 | April 13 | 145 |
| 1886-87 | November 24 | ||
| 1885-86 | December 5 | April 15 | 131 |
| 1884-85 | November 24 | April 13 | 140 |
| 1883-84 | November 15 | April 13 | 150 |
| 1882-83 | December 2 | April 10 | 129 |
| 1881-82 | November 20 | March 2 | 102 |
| 1880-81 | November 16 | April 29 | 164 |
| 1879-80 | November 19 | March 23 | 125 |
| 1878-79 | December 6 | March 29 | 113 |
| 1877-78 | December 29 | March 9 | 70 |