Today, March 9, 2026, residents in Thunder Bay, Ontario, are seeing a shift in the weather as a mild afternoon leads into a much colder night. According to Environment Canada, the temperature is forecast to drop from a daytime high of 3°C to -7°C by 5:00 AM tomorrow morning.
The colder air will be accompanied by wind chill values that are expected to reach -13°C by the early hours of March 10, 2026. This rapid change from above-freezing to below-zero temperatures can often lead to icy patches on local roads and sidewalks as any melted snow or moisture refreezes.
Despite the cooling trend and the brisk wind chill, there are currently no active weather alerts in effect for the city. Residents should remain aware of these changing conditions and dress for the cold as the transition to spring weather continues in the region.
