Thunder Bay Weather Focus – Christmas Day 2025: Cold Start, Snow Returns Tonight
Thunder Bay, ON (6:00 AM EST – Thursday, December 25, 2025) — Christmas morning is starting off cold and quiet across Thunder Bay, with partly cloudy skies and -12°C at the airport. A light northerly wind is keeping the wind chill near -15, but visibility remains excellent at 24 km.
Today: Cloudy with a Few Flurries Possible
The day stays mostly cloudy with a 40% chance of flurries and a daytime high near -6°C. Winds remain generally light today, but it will still feel wintery—especially in shaded areas and along exposed waterfront and higher terrain.
Tonight: Snowfall Warning in Effect – Heavy Snow Develops
A YELLOW Snowfall Warning remains in effect, with significant snow expected Thursday night. Snow is forecast to begin Thursday evening and become heavy at times overnight, with 15 to 20 cm possible by Friday morning.
Areas closer to Lake Superior could see locally higher totals, along with blowing snow as winds gust up to 50 km/h, reducing visibility at times.
Friday: Snow Tapers, Milder Air Moves In
Snow should ease to flurries Friday morning, and temperatures will rise toward +1°C, creating a mix of winter travel concerns: snow-covered roads early, then potentially wetter/slushier surfaces later in the day.
Travel Outlook
If you’re travelling for Christmas gatherings, the best window is earlier today before the heavier snow arrives. Overnight and early Friday could bring slow travel, reduced visibility, and rapidly changing road conditions—especially on exposed stretches outside the city and near the lakeshore.
The Last Word on Weather
Thunder Bay Weather Focus for Christmas Day 2025: -12°C this morning with flurries possible today. A Snowfall Warning is in effect with 15–20 cm expected Thursday night into Friday morning, with blowing snow near Lake Superior.
