Ottawa is in store for a bright morning followed by an overcast afternoon and a rainy evening on Sunday. According to Environment Canada’s weather forecast, the sun will be shining early in the day, and around noon, clouds will begin to roll in. By early evening, it will be overcast. The temperature will reach a high of 24 C and the humidex will hit 27. Overnight, expect a few showers and a risk of thunderstorms. The temperature low will be 18 C. On Monday, prepare for a chance of showers and a high of 25 C. Tuesday, expect 26 C with a mix of sun and clouds. On Wednesday, there will be a chance of shower and a high of 24 C.