General Discussion

from Google:

Seattle receives an average of about 150 to 152 sunny days per year, although definitions can vary. While the city has a reputation for being cloudy, Seattle has a higher number of sunny days than cities like Portland, with most of its cloudy days being shorter, overcast periods rather than heavy rainfall.

Denver receives about 252 to 300 days of sunshine per year, though the exact number depends on the definition of "sunny day". While the common claim of 300 days is based on older marketing or a broader definition of a "sunny" day, current data suggests around 69% of days are sunny, which equates to approximately 252 days.