Ontario’s climate is considered continental. Due to Ontario’s size and diverse geography, temperatures may vary tremendously from region to region and even within the regions themselves.

Temperatures are given officially in degrees Celsius (C) with the Fahrenheit equivalent (F) often added. To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9, divide that total by 5, then add 32. Environment Canada provides current Ontario weather updates and local forecasts.

Spring
From March – May, the average spring temperature ranges from 8˚ C to 18˚ C (46˚ F to 64˚ F).

Summer
From June – mid-September, temperatures range from 21˚ C to 31˚ C (70˚ F to 88˚ F).

Fall
From mid-late September – November, temperatures range from 7˚ C to 17˚ C (45˚ F to 63˚ F).

Winter
From December – February, temperatures hover between -4C to -18 C (25˚ F to 0˚ F). Snowfall usually occurs through December, January and February. Precipitation in Northern Ontario varies from 70 cm to 97 cm (28 in. to 38 in.). In Southwestern Ontario, it averages about 95 cm (37 in.) per year. A boon to skiers and outdoors enthusiasts, annual snowfalls east of Lake Huron and Georgian Bay, including Owen Sound, can exceed 339 cm (134 in.).