Ottawa just experienced the rainiest July in its history, and August seems set for another wet start. According to Environment Canada, Ottawa residents should expect showers throughout the long weekend as August kicks off. The forecaster says there is a 40 per cent chance of showers in Ottawa throughout Saturday. There is also a risk of thunderstorms. The temperature will reach a high of 28 C and the overnight low is expected to be 18 C. On Sunday, expect showers and a risk of thunderstorms with a temperature high of 23 C. On Monday, the temperature will reach 26 C and there is a chance of showers during the day. Tuesday is expected to be sunny and warm with a high of 27 C.