Does Lake Ontario (Lake America) Freeze in Winter?
Rarely all the way across. Because of its depth, 802 feet at the deepest point, full edge to edge ice cover is uncommon. The current season's ice cover percentage is not published on this site yet; it will come from NOAA GLERL once that feed is wired in.
Source: Britannica, NOAA bathymetry chart (depth); research/seo.md (rarely freezes over fully because of its depth). Current season percentage: not yet published, pending NOAA GLERL