The stretch of sunny weather will continue in Ottawa heading into the weekend, but you may need a jacket or sweater as you head outside in the evenings. Environment Canada’s forecast calls for a mainly sunny day on Friday. High 22 C. It will be clear tonight. Low 9 C. Saturday will see mainly sunny conditions. High 25 C. A mix of sun and cloud is expected on Sunday with a 60 per cent chance of showers. High 25 C. The outlook for Monday calls for sunshine. High 20 C. Tuesday will see a mix of sun and cloud with a 60 per cent chance of showers. High 25 C. The normal temperatures for this time of year are a high of 20 C and a low of 10 C.