From “Outdoor Report: Fossil Hunts and Cliff Hikes” (4th paragraph down)
May 29, 2014 – “It’s been a tough slog for Canadians waiting anxiously for spring warmth this year. Temperature roller coasters are normal in spring, but there have been many prolonged cool or cold stretches this spring.
Just this week there was frost in the Maritimes three nights in a row, record cold temperatures in Newfoundland, and snow in St. John’s as well as the BC interior and the Alberta Rockies.
Thanks to Argiris Diamantis for this link