Mirror Lake SP (c) Copyright, 2003. E.J. Hopkins,    

Wisconsin
State Climatology Office
Prof. John Young, Director

Cb Clouds, Fitchburg, WI (c) Copyright, 1998 E. J. Hopkins  

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WISCONSIN Lake Ice Climatologies:
Duration of Lake Ice

The dates of the freeze ("ice in") and thaw ("ice out") for nearly three dozen lakes in Wisconsin have been monitored for decades to more than 150 years.  From these dates, the total ice duration on the lakes for each season has been computed, representing the total number of days that I remained on the lakes. (Note: Some lakes, such as the Madison area lakes may have experienced several separate times in a season when ice covered the lake. The duration listed here reflects the total number of days of ice cover, and not necessarily the length of time elapsed between the dates of first ice in and last ice out.  Links to graphs of the lake ice duration for selected lakes over the course of several winter seasons appear in the tables below.  Some of these data were obtained from global lake and river ice phenology files provided to the National Snow and Ice Data Center (NSIDC) by a variety of researchers, to include John Magnuson and Dale Robertson.

Numbers on map correspond to list of lakes below:

Lake No.
Name
Latitude
[deg N]
Longitude
[deg W]
County
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Allequash Lake
Big Green Lake
Big Muskellunge Lake
Black Otter Lake
Chequamegon Bay
Crystal Bog
Crystal Lake
Devils Lake
Green Bay At Menominee
Lake Escanaba
Lake Geneva
Lake Kegonsa
Lake Koshkonong
Lake Mallalieu
Lake Mendota
Lake Monona
Lake Nebish
Lake Shishebogama
Lake Wingra
Little Lake
Little Rock Lake
(Big) Long Lake
Maple Lake
Mystery Lake
North Trout Lake
North Twin Lakes
Rock Lake
Shell Lake
Sparkling Lake
Spruce Lake
Trout Bog
Trout Lake

46.03
43.80
46.02
44.33
46.67
46.00
46.00
43.42
45.00
46.07
42.58
42.97
42.87
44.98
43.10
43.05
46.05
45.90
43.05
44.92
46.00
45.75
46.13
46.05
46.05
46.05
43.07
45.73
46.00
46.05
46.03
46.03
89.62
89.00
89.62
88.63
90.88
89.60
89.62
89.73
87.64
89.58
88.43
89.25
88.95
92.77
89.40
89.37
89.58
89.82
89.42
87.28
89.70
91.65
89.73
89.57
89.67
89.13
88.92
91.90
89.70
89.57
89.68
89.67
Vilas
Green Lake
Vilas
Outagamie
Ashland
Vilas
Vilas
Sauk
Menominee Co., MI
Vilas
Walworth
Dane
Jefferson
St. Croix
Dane
Dane
Vilas
Vilas
Dane
Door ?
Vilas
Washburn
Vilas
Vilas
Vilas
Vilas
Jefferson
Washburn
Vilas
Vilas
Vilas
Vilas
Return to: State Climatology Homepage

Latest revision: 8 August 2004

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URL Address: http://www.aos.wisc.edu/~sco/lakes/WI-lake_ice-1.html