I am ready to repot some Junipers and Boxwoods, but it is only F 49 (about
10 C) and windy at high noon yet. How do you folks up north do it?

I have a basement. Short of moving north so you can also have one, I suggest
you use your kitchen, being careful not to clog the sink drain.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"A tree never hits an automobile except in self defense." - Woody Allen