What Climate Zone Is Ontario?
List of Plant Hardiness Zones for Cities and Towns in Ontario Location Hardiness Zone Orillia Zone 5b: -26.1°C to -23.3°C Oshawa Zone 6a: -23.3°C to -20.6°C Ottawa Zone 5b: -26.1°C to -23.3°C Owen Sound Zone 6a: -23.3°C to -20.6°C What climate zone is Toronto in? Downtown Toronto sits in a pocket of the humid continental …