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3h ago

October Warm Spell Pushes Southern and Northeastern Ontario Toward 30 C

A stalled East Coast high is driving the warmth, with near‑normal readings expected after Tuesday showers.

People relax on a bench overlooking Ramsey Lake in Sudbury. Sudburians are enjoying July-like weather this weekend.
Emilie Fredin of London enjoys the waves at Port Stanley Beach on a summer-like Friday, Oct. 3, 2025. (Derek Ruttan/The London Free Press)

Overview

  • Environment Canada reports weekend highs of roughly 27 to 30 C across southern Ontario, far above typical early‑October norms of 15 to 17 C.
  • Meteorologists say the setup stems from a strong, stationary high‑pressure system over the U.S. East Coast funnelling warm air into the province.
  • Clear skies are enhancing daytime heating, and a few locales could challenge daily records between Saturday and Monday, including Toronto and Ottawa.
  • Northeastern communities such as Sudbury, Timmins and Sault Ste. Marie are also forecast to reach about 26 to 29 C.
  • Forecasters expect showers Tuesday to usher in a cooldown by midweek, and they caution beachgoers that Great Lakes water remains cooler than the air.