The Climate and Weather of Toronto, Ontario

Average Daily Maximum Temperature – Minimum – Sunshine – Raindays – Snowdays – Snowdepth – Windspeed

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


Toronto’s climate is modified by its location on the shores of Lake Ontario. The water in the lake ensures Toronto is warmer in winter and cooler in summer than it would otherwise be. The Great Lakes location is also the source of Toronto’s summer humidity, which many people find uncomfortable.

Although Toronto is one of Canada’s warmer cities in winter, winters are still severe, with snow on the ground most days between mid-December and mid-March. Snow deeper than 1 cm is seen on 65 days a year on average.

Ottawa, which is farther north than Toronto, and does not sit lakeside, has snow depths of greater than 1 cm on about 120 days each year.

Many factories and industrial plants in both Canada and the USA are located on the Great Lakes and smog has become something of a problem in Southern Ontario. About half of the smog is wind-borne from the USA.

Toronto’s smog is very much a summer phenomenon. Air quality can be classed as very good, good, moderate, poor or very poor. In 2012, Toronto had 59 days of moderate air quality and 2 days of poor air quality. The rest were good or very good.

Toronto enjoys a fairly sunny climate. Toronto summers usually have an abundance of warm or hot sunny days. Winters are rather less sunny than in the prairie cities of Calgary and Winnipeg.

Toronto’s day-to-day weather can be changeable throughout the year.

Toronto, Ontario

Month
of
year

Av. Daily
Max. Temp.
(°C)

Av. Daily
Min.
Temp. (°C)

Av. hours
Sun
(per day)

Av. Days
with
Rain

Av. Days
with
Snowfall

Av. Depth
Snow on
Ground (cm)

Av. Wind
Speed
(km per hr)

Jan.-1-72.8512718
Feb.0-63.959717
Mar.5-25.086317
Apr.1146.2112017
May18107.4120014
Jun.24158.3110013
Jul.26188.9100012
Aug.25177.8110011
Sep.21136.3110012
Oct.1474.8110013
Nov.722.8113016
Dec.2-42.4710316

Comments

  1. it would be very helpful for me and for other people if you could please explain why Ottawa, Montreal and Toronto have the warmest summers every year and which states in canada have the coldest winters