I lived in Whitehorse, Yukon for 4 years.

Every single day of the year I rode my bike to work, but more importantly I took a walk at midday to get sun on my face and some fresh air.

The few days I didn't get sun on my face in the winter I noticed how grumpy I was later in the day and how horrible I felt by the time I got home.

Even at -44C (before wind chill) I loved walking along the river, watching the ice twist and turn and eventually breakup. I loved having the library as a destination - it was about a 10-15 minute walk, then I could hangout inside for 20 minutes to checkout books and warm up before the walk back to the office.

You'll be fine, just wear the right gear.