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
Click and drag anywhere on the chart to zoom in on specific data points.
Longest Duration
164 days
(1880-81)
Shortest Duration
63 days
(2023-24)
Average Duration
113 days
Five-Year Running Average
94 days
Freeze and Thaw Dates
| Winter | Freeze-Over Date | Thaw Date | Days of Ice Cover |
|---|---|---|---|
| 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 |