Thunder Bay – Weather – A cool and foggy morning has settled over Thunder Bay, but skies will quickly clear for a bright and sunny Wednesday. Temperatures are on the rise, bringing a beautiful and comfortable summer day. The fair conditions continue Thursday before a series of unsettled, showery systems begin moving in Friday and through the weekend.
Today’s Weather Overview
Current Conditions
As observed at 7:00 AM EDT at Thunder Bay Airport:
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Temperature: 9.9°C
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Condition: Mainly Sunny with patchy fog
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Wind: West at 5 km/h
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Pressure: 102.0 kPa and falling
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Dew Point: 9.9°C
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Humidity: 100%
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Visibility: 32 km
After fog clears this morning, skies will remain sunny throughout the day, with a forecasted high of 23°C and a humidex of 26. A UV index of 8 means sun protection is essential during midday hours.
Tomorrow’s Forecast
Expected Conditions
Thursday, July 10
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Daytime: Another sunny day with slightly cooler temperatures.
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High: 21°C
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UV Index: 8 (Very High)
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Night: Cloudy periods develop with a 30% chance of showers.
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Low: 14°C
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Friday, July 11
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Daytime: Skies remain cloudy, with a 30% chance of showers.
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High: 22°C
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Night: 60% chance of showers increases after sunset.
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Low: 15°C
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Saturday, July 12
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Daytime: Cloudy conditions continue with a 40% chance of rain.
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High: 22°C
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Night: Cloudy periods with a 30% chance of showers.
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Low: 14°C
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Wardrobe Recommendations
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Today: Layer up early, then switch to lighter summer wear by mid-morning. Sunglasses and sunscreen are strongly advised.
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Thursday: Similar to today but slightly cooler—perfect for outdoor plans. Prepare for potential evening showers.
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Friday–Saturday: Carry a light waterproof jacket and umbrella. Temperatures will stay mild but conditions may become damp.
Weather Trivia
Did you know?
Thunder Bay’s foggy mornings are common in July, especially when cool air meets warmer surface conditions from nearby Lake Superior. These fogs often burn off by mid-morning, leading to crystal-clear summer skies like today.
