If you’re trick-or-treating in or around Hamilton tonight, you probably won’t need a winter coat under your costume.Today is forecast to be the hottest Halloween on record in Ontario municipalities including Hamilton, Toronto, Burlington, St. Catharines, Lincoln, Niagara Falls, Toronto, Oakville, Mississauga and Brampton. Ottawa and a number of places in Quebec are also forecast to set heat records. According to CBC’s Climate Data Dashboard, which sources data from the Meteorological Service of