History of Ice on Lake Mendota

HISTORY OF FREEZING AND THAWING OF LAKE MENDOTA, 1852-53 to 2022/23

Wisconsin State Climatology Office

WINTER	CLOSED	OPENED	DAYS		WINTER	CLOSED	OPENED	DAYS
1852-53 1853-54 1854-55 1855-56 1856-57 1857-58 1858-59 1859-60 1860-61 1861-62 1862-63 1863-64 1864-65 1865-66 1866-67 1867-68 1868-69 1869-70 1870-71 1871-72 1872-73 1873-74 1874-75 1875-76	--- 27 Dec --- 18 Dec 6 Dec 25 Nov 8 Dec 7 Dec 14 Dec 2 Dec 26 Dec 18 Dec 8 Dec 14 Dec 18 Dec 12 Dec 10 Dec 2 Dec 24 Dec 19 Dec 30 Nov 29 Nov 10 Dec 10 Jan	5 Apr --- --- 14 Apr 6 May 26 Mar 14 Mar 26 Mar 10 Apr 13 Apr 9 Apr 21 Apr 5 Apr 18 Apr 20 Apr 31 Mar 16 Apr 12 Apr 2 Apr 23 Apr 23 Apr 14 Apr 15 Apr 10 Apr	--- --- --- 118 151 121 96 110 117 132 104 125 118 125 123 110 127 131 99 126 144 136 126 91		1876-77 1877-78 1878-79 1879-80 1880-81 1881-82 1882-83 1883-84 1884-85 1885-86 1886-87 1887-88 1888-89 1889-90 1890-91 1891-92 1892-93 1893-94 1894-95 1895-96 1896-97 1897-98 1898-99 1899-00	8 Dec 6 Jan 21 Dec 17 Dec 23 Nov 2 Jan 10 Dec 18 Dec 17 Dec 12 Dec 5 Dec 24 Dec 2 Jan 14 Jan 26 Dec 27 Dec 16 Dec 4 Dec 28 Dec 5 Jan 21 Dec 17 Dec 9 Dec 27 Dec	17 Apr 9 Mar 12 Apr 25 Mar 3 May 21 Mar 13 Apr 15 Apr 20 Apr 19 Apr 15 Apr 15 Apr 31 Mar 30 Mar 16 Apr 2 Apr 7 Apr 15 Mar 8 Apr 5 Apr 10 Apr 27 Mar 18 Apr 17 Apr	130 62 112 99 161 78 124 119 124 128 131 113 88 75 111 97 112 101 101 91 110 100 130 111

WINTER	CLOSED	OPENED	DAYS		WINTER	CLOSED	OPENED	DAYS
1900-01 1901-02 1902-03 1903-04 1904-05 1905-06 1906-07 1907-08 1908-09 1909-10 1910-11 1911-12 1912-13 1913-14 1914-15 1915-16 1916-17 1917-18 1918-19 1919-20 1920-21 1921-22 1922-23 1923-24 1924-25 1925-26	25 Dec 15 Dec 25 Dec 13 Dec 14 Dec 1 Jan 20 Dec 1 Jan 22 Dec 18 Dec 9 Dec 28 Dec 24 Dec 12 Jan 16 Dec 28 Dec 16 Dec 11 Dec 3 Jan 9 Dec 25 Dec 25 Dec 16 Dec 1 Jan 19 Dec 16 Dec	11 Apr 30 Mar 24 Mar 17 Apr 1 Apr 8 Apr 24 Mar 24 Mar 7 Apr 26 Mar 20 Mar 14 Apr 2 Apr 10 Apr 10 Apr 8 Apr 11 Apr 5 Apr 26 Mar 28 Mar 16 Mar 31 Mar 20 Apr 14 Apr 3 Apr 19 Apr	107 105 89 126 108 97 94 83 106 98 101 108 99 88 115 102 116 115 82 110 81 96 125 104 105 124		1926-27 1927-28 1928-29 1929-30 1930-31 1931-32 1932-33 1933-34 1934-35 1935-36 1936-37 " 1937-38 1938-39 1939-40 1940-41 1941-42 1942-43 1943-44 1944-45 1945-46 1946-47 1947-48 1948-49 1949-50	6 Dec 17 Dec 21 Dec 3 Dec 16 Dec 30 Jan 10 Dec 25 Dec 24 Dec 20 Dec 7 Dec 5 Jan 7 Dec 28 Dec 2 Jan 5 Jan 3 Jan 7 Dec 16 Dec 18 Dec 13 Dec 30 Dec 21 Dec 24 Dec 23 Dec	19 Mar 1 Apr 27 Mar 20 Mar 24 Mar 4 Apr 4 Apr 26 Mar 28 Mar 30 Mar 30 Dec 13 Apr 22 Mar 4 Apr 16 Apr 11 Apr 26 Mar 2 Apr 8 Apr 20 Mar 21 Mar 10 Apr 3 Apr 30 Mar 11 Apr	103 106 96 107 98 65 115 91 94 101 - 121 105 97 105 96 82 116 114 92 98 101 104 96 109

WINTER	CLOSED	OPENED	DAYS		WINTER	CLOSED	OPENED	DAYS
1950-51 1951-52 1952-53 1953-54 1954-55 1955-56 1956-57 1957-58 1958-59 1959-60 1960-61 1961-62 1962-63 1963-64 1964-65 1965-66 1966-67 1967-68 1968-69 " 1969-70 1970-71 1971-72 1972-73 1973-74 1974-75 1975-76	11 Dec 16 Dec 30 Dec 30 Dec 2 Jan 12 Dec 14 Dec 30 Dec 9 Dec 29 Dec 19 Dec 16 Dec 12 Dec 20 Dec 15 Dec 11 Jan 26 Dec 27 Dec 17 Dec 25 Dec 16 Dec 24 Dec 5 Jan 7 Dec 21 Dec 2 Jan 27 Dec	12 Apr 8 Apr 21 Mar 25 Mar 4 Apr 4 Apr 4 Apr 4 Apr 14 Apr 12 Apr 6 Apr 12 Apr 3 Apr 11 Apr 14 Apr 17 Mar 3 Apr 27 Mar 19 Dec 10 Apr 8 Apr 13 Apr 19 Apr 14 Mar 5 Apr 19 Apr 24 Mar	122 114 81 85 92 114 111 95 126 105 108 117 112 113 120 65 98 91 - 108 113 110 105 97 105 107 88		1976-77 1977-78 " 1978-79 " 1979-80 1980-81 1981-82 1982-83 1983-84 1984-85 " 1985-86 1986-87 1987-88 1988-89 1989-90 1990-91 1991-92 1992-93 1993-94 1994-95 1995-96 1996-97 1997-98 1998-99 1999-00	3 Dec 7 Dec 10 Dec 10 Dec 25 Dec 29 Dec 20 Dec 28 Dec 13 Jan 19 Dec 25 Dec 2 Jan 14 Dec 13 Dec 2 Jan 29 Dec 12 Dec 26 Dec 18 Dec 24 Dec 27 Dec 6 Jan 10 Dec 20 Dec 11 Jan 30 Dec 14 Jan	28 Mar 8 Dec 11 Apr 13 Dec 19 Apr 6 Apr 23 Mar 3 Apr 8 Mar 8 Apr 26 Dec 27 Mar 31 Mar 12 Mar 29 Mar 5 Apr 15 Mar 24 Mar 26 Mar 11 Apr 31 Mar 21 Mar 7 Apr 1 Apr 27 Feb 21 Mar 7 Mar	115 - 123 - 118 99 93 96 54 111 - 85 107 89 87 97 93 88 99 108 94 74 119 102 47 82 53

WINTER

CLOSED

OPENED

DAYS

WINTER

CLOSED

OPENED

DAYS

2000-01
2001-02
"
2002-03
2003-04
2004-05
2005-06
2006-07
2007-08
2008-09
2009-10
2010-11
2011-12

13 Dec
2 Jan
4 Mar
4 Jan
7 Jan
25 Dec
19 Dec
20 Jan
26 Dec
16 Dec
29 Dec
15 Dec
14 Jan

7 Apr
12 Jan
15 Mar
3 Apr
27 Mar
5 Apr
24 Mar
27 Mar
10 Apr
23 Mar
26 Mar
3 Apr
11 Mar

115
--
21
89
80
101
95
66
106
97
87
109
57

2012-13
2013-14
2014-15
2015-16
2016-17
2017-18
2018-19
"
2019-20
2020-21
2021-22
2022-23

14 Jan
16 Dec
2 Jan
11 Jan
1 Jan
27 Dec
15 Dec
10 Jan
12 Jan
3 Jan
7 Jan
25 Dec

11 Apr
12 Apr
3 Apr
13 Mar
7 Mar
31 Mar
21 Dec
31 Mar
22 Mar
20 Mar
2 Apr
2 Apr

87
117
91
62
65
94
---
86
70
76
85
98

Latest revision: 3 April 2023

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URL Address: https://www.aos.wisc.edu/oldsco/lakes/Mendota-ice.html