London, Ontario: 152 Sunny Days Per Year on Average

London, Ontario receives 2,079 annual sunshine hours (Environment Canada, 1981–2010 normals).

Assuming ~13.6 daylight hours/day average, this equals ~152 sunny days per year (days with measurable bright sunshine).

Seasonal split: Summer (Jun–Aug) ~280 hrs/month; Winter (Dec–Feb) ~60–80 hrs/month. Cloudier than Prairie cities (Calgary ~2,400 hrs), sunnier than coastal BC (Vancouver ~1,900 hrs).