Students in Ottawa’s largest school boards return to class today and the weather at recess will be hot, humid, and could come with rain. Environment Canada’s forecast for Ottawa calls for showers ending in the morning, followed by a cloudy afternoon with a 40 per cent chance of showers and the risk of a thunderstorm. The forecast high is 23 C with a humidex of 31. After school, expect a mainly cloudy evening with a 40 per cent chance of showers and a low of 15 C. Wednesday’s forecast is cloudy with a 60 per cent chance of showers and the risk of a thunderstorm, with a high of 24 C and a humidex of 32. Thursday’s outlook is cloudy with a 40 per cent chance of showers and a high of 24 C. A chance of showers is also in the forecast for Friday, but the Labour Day long weekend is looking pleasant.