Thunder Bay – September 14–16 Weather Forecast

Thunder Bay Three-Day Forecast: Showers Tonight and Wind Gusts to 70 km/h Tuesday
THUNDER BAY — WEATHER — Monday, September 14, 2026 — Thunder Bay’s next three days bring sunshine, overnight showers and a windy Tuesday before sunny skies return Wednesday.
This September 14–16 outlook is based on Environment Canada’s forecasts issued at 5:30 a.m. EDT September 14.
Monday, September 14: Sunshine Before Overnight Showers
Monday starts sunny, with a mix of sun and