Lakeville's winter parking ordinance is in effect November 1 through April 1. No cars can be parked on the street between 2 a.m. and 6 a.m. even if there is no snow. There is also no on-street parking when it's snowing, until the roads have been cleared.
You can find more details about this ordinance in the Lakeville City Code (6-1-1-3).