Collingwood, Ontario, is in for a warm, sunny start to the week before showers and possible thunderstorms arrive on Tuesday, according to Environment Canada. No weather alerts are in effect for the area.
Monday, July 20, 2026, will be sunny with a high of 26 C and a humidex making it feel like 28. The UV index is forecast to reach 8, which is considered very high. Residents should protect their skin, especially between 11 a.m. and 3 p.m., as unprotected skin can burn quickly on clear days, federal sun safety guidelines warn.
Conditions will change overnight, with partly cloudy skies moving in, a few showers developing before morning, and a risk of thunderstorms. Tuesday is expected to bring showers and a continued thunderstorm risk, with local rainfall amounts of 10 to 15 millimeters. A chance of showers may continue into Wednesday before clearing up on Thursday.
These patterns are typical for Collingwood’s humid continental climate, where warm, humid summer days often give way to thunderstorms. The conditions are in line with normal July weather for the area, where average highs sit around 26 C and lows near 14 C, according to normals displayed by Environment Canada.
Residents can expect a return to mostly sunny skies by Thursday, with temperatures climbing back into the mid-20s through the end of the week.
