For the average tourist, Toronto's weather can present some inconveniences. Among the major world tourist cities, Toronto has the third-coldest winter temperatures, comparable to Chicago or Boston, but not as cold as say, Moscow or Montreal. Mild periods do occur melting accumulated snowfall from time to time, but nevertheless you must come prepared and dress warmly, preferably in layers as conditions are changeable. The average January high/low temperature in Toronto is -1°C/-7°C. In January, February, and early March, temperatures can drop as low as -30°C or colder factoring in the biting windchill. Exposed skin will freeze in minutes at these temperatures. In July, the average max/min is 27°C;18°C with sometimes hot, humid conditions, but the city has many parks or public spaces with gardens to cool off. Most evenings are a little muggy. Bring an umbrella at any time of the year, rain and/or snow are common during the colder season and sudden, usually brief thunderstorms are frequent in summer; however, you will experience sunshine on most days.
Areas north of the city experience a colder winter and more frequent poor driving conditions with snow drifts and icy conditions, as well as more severe summer storms. Avoid river creek banks or bridge underpasses during periods of excessive rain or melting snow.
On occasion, during the winter months, Toronto will be hit with a severe winter storm accompanied by significant snowfall , be prepared for possible travel delays. Avoid driving during and immediately after the storms if at all possible. This is especially true for those unfamiliar with winter driving and controlling a car in a skid. Take the public transit or stay inside. Only in the most severe storms or after a series of storms, however, surface transit and air travel can be significantly delayed or even shut down altogether.