A mix of sun, rain and high humidity is expected in Toronto this weekend, according to Environment Canada. On Friday afternoon, temperatures are forecast to reach a high of 27 C, with partly cloudy skies, a 40 per cent chance of showers and a risk of thunderstorms. The humidex is expected to reach 34. In the evening, a low of 21 C is expected. Similar conditions are expected Saturday with a high of 29 C, a 60 per cent chance of showers and a risk of thunderstorms. Cloudy periods are also expected, with the humidex forecast to reach 37. The overnight low is expected to be 19 C. On Sunday, temperatures are expected to reach a high of 28 C, with a 30 per cent chance of showers. Temperatures are forecast to drop to a low of 18 C Sunday night.