Thunder Bay Weather for October 25 2025

THUNDER BAY - Weather - Here’s your weekend weather outlook for Saturday, October 25th through Monday, October 27th — and it’s shaping up to be a beautiful stretch of late-October weather.

We’re starting the morning off chilly — sitting right around zero degrees at the airport, with a light north-northwest breeze making it feel closer to minus one. Humidity is high at 97%, so frost is possible in a few spots around the region.

For today, expect cloudy skies early, but sunshine will break through around midday. Winds will stay light — up to 15 kilometres an hour — and your afternoon high will reach a comfortable 10 degrees.

Tonight, skies remain clear and calm, dipping to a mild plus three overnight.

Sunday looks fantastic — mainly sunny with a high near 12 degrees, perfect for outdoor activities or a fall drive along Lake Superior.
Sunday night, clear once again, with a low of plus three.

Heading into Monday, the sunshine continues with another bright day and a high near 12.

🎙️ Overall — a calm, dry, and mild weekend ahead for Thunder Bay, with plenty of sunshine and little wind.

That’s your Thunder Bay Weather Update from the NetNewsLedger Weather Desk, powered by Environment Canada — keeping you connected to what’s happening in your skies and across Northwestern Ontario.

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