Coldest I have ever done is -38c (-20f). With winds that day that would be -42c (-45f) and add anywhere between another 5-30kph to the winds given it was a headwind that day and you have one cold commute. One of the few times I had to thaw one of my eyes at work to open it. I have a roughly 45 min commute of 8km(about 5 miles).

This year the coldest was a -19c (-2 f) day. Most days have been around 0c (-32f)

All I can say is I love summer .