The high will reach 29 C with a humidex of 34 and a very high UV index of eight. Thursday's forecast calls for a mix of sun and cloud in the morning with a 30 per cent chance of showers late in the morning and in the afternoon, along with the risk of a thunderstorm. Friday night will be the coolest in a while, with a low of 15 C and some cloudy periods. Rain could be on the way this afternoon, along with its buddies thunder and lightning, as we expect another hot and humid day on the horizon for Ottawa-Gatineau. The long weekend looks quite amazing.

Source: CBC News July 28, 2016 11:15 UTC