The Climate and Weather of Ottawa, Ontario

Ottawa lies farther north than Toronto, resulting in significantly colder winters.

Unlike many of Ontario's cities, Ottawa does not sit on the shores of Lake Ontario. This results in higher summer temperatures in Ottawa but increases the harshness of the winters.

Ottawa has a semi-continental climate, with a warm, humid summer and a very cold winter.

Winters in Ottawa are severe. Snow depths of greater than 1 cm are seen on about 120 days each year compared with about 65 days in Toronto. Much greater depths of snow are also found in Ottawa than Toronto.

Ottawa, like other cities in Ontario, enjoys a sunny climate. Summers usually have a generous number of warm or hot sunny days. Winters are rather less sunny than in the prairie cities of Calgary and Winnipeg.

Ottawa's day to day weather can be changeable throughout the year.