It cold be a wet Wednesday in the capital, with 10 to 20 millimetres of rain in the forecast. Environment Canada’s weather forecast for Ottawa calls for clouds and showers beginning in the afternoon, with a high of 25 C and a humidex of 33. Showers are expected to end after midnight, but there could still be thunderstorms overnight. The low is 18 C. Thursday’s forecast is mainly cloudy with a high of 26 C and a humidex of 32. Friday could see a few showers with a high of 25 C. A 30 per cent chance of showers is in the forecast for Saturday with a mix of sun and cloud and a high of 24 C. Sunday’s looking mainly sunny with a high of 25 C. There is a chance showers could rain on the Labour Day parade on Monday.