Toronto is set to experience what meteorologists are calling 'building humidity' by the end of the work week, as a stretch of warm weather continues across the region. The term refers to a gradual increase in moisture levels in the air, making conditions feel more muggy and uncomfortable.
Warm temperatures persist
High temperatures are expected to remain well above seasonal norms, with daytime highs reaching the high 20s Celsius. The humidity will build throughout the week, peaking by Friday. Overnight lows will also stay mild, offering little relief from the heat.
Health and safety tips
Residents are advised to stay hydrated, avoid strenuous outdoor activities during peak heat hours, and check on vulnerable individuals such as the elderly and those with pre-existing health conditions. The city has opened cooling centers to provide relief.
This weather pattern is part of a larger system affecting much of southern Ontario, with similar conditions expected in other major cities. The humidity is likely to persist into the weekend before a cold front moves in.



