June 19, 2026: Thunder Bay Weather Outlook – Sunny Start Before Clouds Build Later Today

Thunder Bay weather for June 19, 2026: mainly sunny and cool near 7°C this morning, increasing cloudiness later today, a high of 21°C, and showers likely Saturday.
Thunder Bay – WEATHER – Thunder Bay begins Friday with a crisp but bright morning, as mainly sunny skies and rising pressure bring a calmer start to the day. Temperatures are cool near 7°C, but conditions will warm steadily, with cloud cover expected to increase late this morning.
Today’s Weather Overview