The pleasant weather will continue almost all the way through the weekend in Ottawa, Environment Canada says. According to the weather forecast for Ottawa, Sunday will reach a high of 27 C and will feature a mix of sun and clouds. Showers may roll in around 6 p.m., and there is a risk of thunderstorms in the evening. Next week will be marked by warm weather and showers. On Sunday, expect 27 C and a 40 per cent chance of showers. Tuesday’s forecast calls for 25 C and a chance of showers. On Wednesday, expect 24 C and a chance of showers.