Montreal is expected to have a bright start to the weekend. Clear skies and a nighttime low of 12 C on Friday will lead to pouring sunshine come Saturday. The temperature could hit a high of 24 C by Saturday afternoon. An above-seasonal low of 18 C is then expected at night The forecast for Sunday is gloomier. Conditions could bring thunder with a 60 per cent chance of rain. Roughly 5 millimetres are expected to fall over the greater Montreal area. A daytime high of 23 C on Sunday could then drop to 13 C. The normal high and low for the region at this time of year are 23 and 13 C, respectively.