July 31, 2026: Thunder Bay Faces a Hot, Humid Friday with Afternoon Thunderstorm Risk

THUNDER BAY – WEATHER – Thunder Bay is starting Friday under mostly cloudy skies, warm temperatures, and high humidity. Fog patches are lifting this morning, but the combination of heat and moisture could help showers and thunderstorms develop later in the day.
The weekend will begin noticeably cooler before sunshine and warmer temperatures return Sunday and Monday.
Today’s Weather Overview
Current Conditions
As of 9:00 a.m. EDT at the Thunder Bay observation station, the tempe