Stouffville is in for a hot and humid start to the week, with sunny skies pushing temperatures to 25°C on Monday and a Humidex making it feel like 27. Environment Canada also warns of a very high UV index of 9, meaning sun protection is a must for anyone heading outdoors.
Forecasters expect the humidity to ramp up further on Tuesday, with a Humidex of 32 and a risk of thunderstorms bringing 10 to 15 millimetres of rain. While not reaching official heat warning levels, the conditions will feel muggy and uncomfortable for those without air conditioning.
With the UV index hitting 9, residents are reminded to limit time in the sun especially between 11 a.m. and 3 p.m., wear UV-protective sunglasses, stay in the shade when possible, and reapply sunscreen every two hours. The high reading comes as much of southern Ontario faces a 70 to 80 per cent chance of above-average temperatures through September, according to Environment Canada’s seasonal outlook.
Looking ahead, the remainder of the week brings more typical summer variability, with a mix of sun and cloud and daytime highs hovering around 22°C to 26°C. Anyone planning outdoor activities should keep an eye on the sky mid-week, as the Toronto and Region Conservation Authority cautions that urban watersheds can rise quickly during heavy downpours, potentially leading to flash flooding in York Region.
