Sarnia, Ontario, is in for a hot and humid week, with temperatures expected to climb to 30°C by Wednesday, July 8, and humidex values reaching 36°C on Tuesday, according to Environment Canada. The week started with a mix of sun and cloud and a 40 percent chance of showers on Monday, along with gusty winds and a humidex of 32.
The UV index is forecast to be very high, hitting 8 on Monday and 9 on Tuesday. Health officials are reminding people to take care by wearing sunscreen with SPF 30 or higher, along with a wide-brimmed hat and sunglasses, and to reduce time in the sun between 11 a.m. and 3 p.m.
Tuesday will bring similar conditions, with a high of 29°C and a 30 percent chance of showers. The humidex is expected to make it feel more like 36°C. Things look to clear up later in the week, with sunny skies expected by Saturday, offering some relief from the sticky conditions. Friday will remain cloudy with a chance of showers.
The hot spell comes after Sarnia and other parts of southwestern Ontario were under heat warnings earlier this summer, when temperatures neared 36°C and humidex values reached the 40s. Environment Canada’s senior climatologist has predicted a warmer than normal summer for the region based on nine forecasting models, though this week’s highs remain typical for early July, when the normal maximum is around 27°C.
Residents are encouraged to stay hydrated, seek shade, and check on vulnerable neighbours as the muggy weather continues. More detailed forecasts are available on Environment Canada’s website.
