It should be a mostly bright and mild few days in Ottawa as summer comes to end and fall begins. According to Environment Canada’s weather forecast, the daily temperature high will remain between 15 C and 20 C for the next week, and most days will be partially or fully sunny. On Sunday, expect a mix of sun and clouds and a high of 18 C. The overnight low will be 4 C and there is a 30 per cent chance of rain showers late this evening. Monday’s forecast predicts a mix of sun and clouds and a high of 15 C. On Tuesday, the last official day of summer, expect a high of 17 C and sunshine. On Wednesday, prepare for a high of 20 C and clear skies.