It’s a rainy and humid start to the weekend in Ottawa, but sunshine and mild temperatures are expected for the first weekend of October. Environment Canada says showers will end late this morning, with a mix of sun and cloud this afternoon. High 20 C. There will be a few clouds tonight. Low 6 C. The forecast calls for sunshine on Saturday. High 16 C. There will be a mix of sun and cloud on Sunday. High 17 C. The outlook for Monday calls for a mix of sun and cloud. High 12 C. Tuesday will see sunshine. High 13 C. The normal temperatures for this time of year are a high of 15 C and a low of 6 C.