Weather In Toronto

This is a consideration page in the Toronto targeted journey.

The city of Toronto has a hot summer humid continental climate (Köppen: Dfa),[103] though was on the threshold of a warm summer humid continental climate (Dfb) until the 20th century but still found in the metropolitan region,[104] with warm, humid summers and cold winters. According to the classification applied by Natural Resources Canada, the city of Toronto is in plant hardiness zone 7a. Some suburbs and nearby towns have lower zone ratings.[105][106]

The city experiences four distinct seasons, with considerable variance in length.[107] As a result of the rapid passage of weather systems (such as high- and low-pressure systems), the weather is variable from day to day in all seasons.[107] Owing to urbanization and its proximity to water, Toronto has a fairly low diurnal temperature range. The denser urbanscape makes for warmer nights year round; the average nighttime temperature is about 3.0 °C (5.40 °F) warmer in the city than in rural areas in all months.[108] However, it can be noticeably cooler on many spring and early summer afternoons under the influence of a lake breeze, since Lake Ontario is cool relative to the air during these seasons.[108] These lake breezes mostly occur in summer, bringing relief on hot days.[108] Other low-scale maritime effects on the climate include lake-effect snow, fog, and delaying of spring- and fall-like conditions, known as seasonal lag.[108]

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Winters in Toronto are typically cold with frequent snowfall.
Winters are cold with frequent snow.[109] During the winter months, temperatures are usually below 0 °C (32 °F).[109] Toronto winters sometimes feature cold snaps when maximum temperatures remain below −10 °C (14 °F), often made to feel colder by wind chill. Occasionally, they can drop below −25 °C (−13 °F).[109] Snowstorms, sometimes mixed with ice and rain, can disrupt work and travel schedules, while accumulating snow can fall anytime from November until mid-April. However, mild stretches also occur in most winters, melting accumulated snow. The summer months are characterized by very warm temperatures.[109] Daytime temperatures are usually above 20 °C (68 °F), and often rise above 30 °C (86 °F).[109] However, they can occasionally surpass 35 °C (95 °F) accompanied by high humidity. Spring and autumn are transitional seasons with generally mild or cool temperatures with alternating dry and wet periods.[108] Daytime temperatures average around 10 to 12 °C (50 to 54 °F) during these seasons.[109]

Precipitation is fairly evenly distributed throughout the year, but summer is usually the wettest season, the bulk falling during thunderstorms. The average yearly precipitation is about 831 mm (32.7 in), with an average annual snowfall of about 1,220 mm (48 in).[110] Toronto experiences an average of 2,066 sunshine hours or 45 percent of daylight hours, varying between a low of 28 percent in December to 60% in July.[110]