While Labour Day weekend will be mostly warm and sunny in Ottawa, the city is expected to deal with some showers before the pleasant weather rolls around. According to Environment Canada’s weather forecast, Saturday will be mainly cloudy with a 40 per cent chance of showers. The temperature will reach a high of 24 C, and an overnight low of 13 C. On Sunday expect 24 C and a mix of sun and clouds. On Monday, which is Labour Day, expect a bright and sunny day with a temperature high of 26 C. Tuesday’s forecast predicts a cloudy day with a high of 22 C.