It will be a muggy pre-summer day in Ottawa this Wednesday. At 8 a.m., Environment Canada was reporting 100 per cent humidity at the Ottawa Airport. Environment Canada’s forecast for the capital calls for a high of 29 C with a humidex of 38 in the afternoon. There is a 30 per cent chance of showers with the risk of a thunderstorm in the afternoon and evening hours. Overnight, expect a low of 19 C, with humidity still making it feel up to 10 degrees warmer. That 30 per cent chance of showers and possible thunderstorms persists into Thursday morning. Thursday’s forecast is cloudy with a high of 24 C and a humidex of 32. There is a 30 per cent chance of showers with the risk of a thunderstorm through the day. Friday is looking mainly cloudy with a high of 24 C and a 30 per cent chance of showers. Summer officially arrives at 10:41 p.m. Friday. The first full day of summer is looking cloudy with a high of 27 C.