[sleepyguy]

A city like Calgary gets 233 days of sunny days a year. All across the prairies there is plenty of days filled with sun. British Columbia would probably not be great (like Seattle) but they could probably generate wind and hydro.

[MegaDeKay]

Its not so much the days but the hours. Days start getting pretty short in winter. The sun also doesn't get as high in the sky so the efficiency of a fixed panel drops further.

[acchow]

Calgary is quite sunny at 2400 hrs/year.

But not nearly as much as Vegas (3800) or LA (3250) or SF (2950).