Article content “It’s going to be on the cooler side. There’s a cooler air mass pretty much overtaking the whole province this weekend,” said Steven Flisfeder, a meteorologist with Environment Canada. We apologize, but this video has failed to load. Try refreshing your browser, or What to expect, weather-wise, in London this long weekend Back to video For London and Southwestern Ontario this weekend, Flisfeder sees daily high temperatures in the low- to mid- 20s and a chance of showers Saturday into Sunday. “There will be breaks” in the rain on the weekend, he predicted. “The showers should be clearing out by Monday. Monday should be the day for outdoor activities.”