[52-6F-62]

That's how it's happened here. Another commenter mentioned that while we've had such highs, we've also experienced record lows. What they didn't associate was how they have come back-to-back.

It's rather usual for a northerly place like Calgary to go from -20˚ to +20˚ Celsius (or the reverse) over the course of a day due to Chinook winds from the mountains. They're really quite a sight if there are any clouds—you can watch the wall of whatever front is blowing in.

In Ontario, it's rather unusual for the same kind of phenomenon, and we've experienced it multiple times this winter.