Pembroke is in for a stretch of hot and sunny weather this week, with Environment Canada forecasting daytime highs between 29°C and 33°C from June 29 to July 5, 2026. These temperatures are several degrees above the normal high of 26°C for this time of year, and the agency is advising residents to take care in the sun, especially on Tuesday when the UV index is expected to hit very high levels.
On Monday, temperatures at the Garrison Petawawa observation station hit 30.2°C with a humidex reading of 33. The humidex is forecast to climb to 37 on Tuesday, making it feel significantly hotter due to the combination of heat and humidity. A UV index of 8, classified as very high, is also expected on Tuesday, which means residents should limit their time in the sun between 11 a.m. and 3 p.m., wear UV-blocking sunglasses, stay in the shade, and reapply sunscreen every two hours, according to Health Canada’s sun safety guidelines.
Southern Ontario typically records the highest UV index values in the country during the summer, making extra precautions important. While the week will be mostly sunny, there is a 40 percent chance of showers and a risk of thunderstorms Tuesday night, along with a 30 percent chance of showers from Wednesday through Friday. However, conditions are expected to remain warm and summer-like overall.
This warm spell fits with Environment Canada’s summer outlook released on June 5, which predicted warmer-than-normal temperatures across most of Canada, including Ontario. The increased frequency of extreme heat is linked to climate change, which is driving more severe heat waves. Residents are reminded to stay hydrated, avoid prolonged sun exposure during peak hours, and check on vulnerable neighbours during this hot stretch.
