It does get cold in the winter, but hot as heck in the summer.
I specifically moved to Kamloops because it is warm and dry.
This area is semi arid desert and ranges from a low of about -15c for a few days in the winter, up to plus 42c for weeks in the summer, and lots of blue sky and sunshine.
The climate in Kamloops is some of the mildest you will anywhere in Canada.