The Wisconsin State Climatology Office keeps comprehensive records of the freeze and thaw dates for three Madison lakes: Mendota, Monona, and Wingra.
Madison Lake Ice Status (2025-2026 Season)
- Lake Mendota: Open
- Lake Monona: Frozen as of December 12
- Lake Wingra: Frozen as of December 1
For more information, see how freeze and thaw dates are determined, and view some interesting ice statistics.