THUNDER BAY – WEATHER – A stretch of calmer, more seasonable late-October weather is setting up for the Thunder Bay region. Following a cool but bright Friday, the weekend will feature mostly sunny skies and mild daytime temperatures, with a touch of cloudiness developing by Monday as another weak system approaches from the west. For late October, conditions look quite favourable for travel, hiking, and outdoor work around Lake Superior’s north shore.
Friday, October 25
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Morning: A chilly start near –3 °C with patchy frost in lower-lying areas.
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Daytime: A mix of sun and cloud, light winds from the northwest at 10–15 km/h.
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High: Around 7 °C, with a light wind chill near –6 early in the day.
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Evening: Partly cloudy, temperatures dropping back to –2 °C overnight.
🧣 A crisp, dry fall day — good visibility and no precipitation expected.
Saturday, October 26
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Morning: Mainly sunny after a cool start near freezing.
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Daytime: Sunny skies with high pressure dominating.
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High: Around 10 °C, light southwesterly winds up to 15 km/h.
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Evening: Clear and calm, overnight low near +3 °C.
🌞 A perfect autumn Saturday — bright skies, mild air, and calm winds across the region.
Sunday, October 27
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Morning: A mix of sun and cloud developing.
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Daytime: Increasing cloud cover late in the day as a weak warm front approaches from Manitoba.
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High: 12 °C, with gentle southwest breezes at 10–20 km/h.
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Evening: Partly cloudy to mostly cloudy, remaining mild.
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Low: Around +5 °C overnight.
🌤 Still mild — likely the warmest day of the four-day stretch.
Monday, October 28
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Morning: Cloudy skies early with a 40% chance of light showers or drizzle.
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Daytime: Overcast periods with isolated light rain developing in the afternoon.
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High: Near 8 °C with winds shifting northwest at 20 km/h.
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Evening: Cloudy periods and cooler air moving in.
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Low: Around +2 °C overnight.
🌦 A bit of moisture returns, but nothing heavy — mostly light rain or brief showers.
🌊 Lake Superior – Western Marine Forecast
For mariners and anglers venturing onto the lake:
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Friday: Light northwest winds at 10–15 knots, waves 1 metre or less.
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Saturday: Light variable winds under 10 knots, calm waters — ideal for small craft.
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Sunday: Southwest winds increasing to 15–20 knots by late afternoon, waves 1 to 1.5 metres.
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Monday: Winds veering northwest 15–25 knots behind a weak front, waves 1.5 to 2 metres, with a chance of light rain or drizzle reducing visibility near shore.
⚓ Overall, a stable marine pattern through the weekend, with only modest wave activity by Monday. Recreational and small-craft conditions are favourable, especially Friday and Saturday.
✅ Forecast Summary
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Best outdoor days: Friday and Saturday — clear, calm, and dry.
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Warmest day: Sunday, with highs near 12 °C.
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Next precipitation: Light showers possible Monday.
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Marine conditions: Smooth sailing through Saturday; choppier by Monday.
