Thunder Bay Weather A Warmer Day but A Chilly Night

Maple Leaf on St Paul Street
A sign the weather is changing a Maple Leaf on the sidewalk on August 24th in Thunder Bay on St. Paul Street

Good morning! Here’s your weather forecast for Thunder Bay:

Today’s Weather: Sunny and Pleasant

It’s a beautiful morning in Thunder Bay with mainly sunny skies. Any fog patches that were present are dissipating, and you can expect a high temperature of 18°C. The UV index is 5, which falls into the moderate range, so consider sun protection if you plan to spend time outdoors.

Tonight’s Conditions: Chilly Night with Fog Risk

Tonight will be clear with a few clouds, and fog patches are expected to develop near midnight. The low temperature will drop to around +2°C, with a risk of frost, so be prepared for cooler conditions.

Thursday’s Outlook: Sunny Start, Increasing Cloudiness Later

Thursday’s weather will start off sunny with fog patches dissipating in the morning. It will be a pleasant day with a high of 19°C. However, be prepared for increasing cloudiness in the afternoon.

Please dress accordingly and take precautions for the chilly temperatures at night, especially with the risk of frost. Enjoy the sunny spells, and if you have any weather-related photos or updates to share, feel free to send them to us at

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