Question 1

What is the annual temperature range in Toronto?

Accepted Answer

Toronto experiences an annual temperature range of approximately 46°C (83°F), spanning from frigid winter lows to warm summer highs. In 2024, temperatures ranged from a minimum of -16.8°C (1.8°F) in December to a maximum of 29.5°C (85.1°F) in August.

The city's continental climate creates distinct seasonal variations. July was the warmest month with an average temperature of 21.6°C (70.9°F), while January was the coldest at -1.5°C (29.3°F). Summer months from June through August maintained comfortable averages around 20.2°C (68.4°F), whereas the winter months of January and February averaged -0.7°C (30.8°F).

This substantial temperature swing of nearly 21°C (38°F) between average summer and winter conditions means Toronto residents experience true four-season weather. The annual mean temperature in 2024 was 10.1°C (50.1°F), reflecting the balance between the city's cold winters and pleasantly warm summers.

For visitors planning a trip to Toronto, this wide temperature range means packing accordingly is essential. Summer clothing works well from June to August, while heavy winter gear including insulated coats and layers is necessary from December through February. Spring and fall offer milder transitional weather, though temperatures can still fluctuate significantly day to day.

Question 2

What is the weather like in Toronto in December?

Accepted Answer

Toronto experiences cold, wet winter weather in December, with temperatures hovering around the freezing mark and frequent precipitation. In December 2024, the average temperature was 0.1°C (32.2°F), with daily highs averaging 2.8°C (37.1°F) and overnight lows dropping to -2.7°C (27.1°F).

December 2024 brought significant temperature swings to Toronto. The coldest day occurred on December 22, when the temperature plunged to -16.8°C (1.8°F), while the warmest day reached 9.7°C (49.5°F) on December 29. Overall, 16 days saw mean temperatures below freezing.

Precipitation was frequent throughout the month. Toronto received a total of 86.9mm (3.4 inches) of precipitation, with 23 days recording measurable amounts. This moisture came as a mix of rain and snow depending on the temperature fluctuations. Humidity remained high at an average of 81.5%.

December in Toronto also means limited sunshine. The city recorded just 69.8 hours of sunshine for the entire month, averaging only 2.3 hours per day. Combined with average wind speeds of 16.9 km/h (10.5 mph), the weather often felt colder than the actual temperature. Visitors to Toronto in December should prepare for winter conditions with warm, layered clothing and waterproof outerwear.

Question 3

How much total rainfall did Toronto receive in 2024?

Accepted Answer

Toronto received a total of 1,245.8 mm (49.0 inches) of precipitation throughout 2024, making it a notably wet year for the city.

The wettest month in Toronto was July 2024 with 198.3 mm (7.8 inches) of rainfall, followed closely by April at 196.8 mm (7.7 inches). In contrast, October 2024 was the driest month, recording just 38.0 mm (1.5 inches) of precipitation. Three months exceeded 100 mm of rainfall during the year.

Seasonal patterns showed distinct variation across Toronto in 2024. Summer (June to August) was the wettest season with 451.0 mm (17.8 inches) of total precipitation, driven largely by July's heavy rainfall. Spring (March to May) followed with 374.1 mm (14.7 inches), while autumn (September to November) was considerably drier at 178.6 mm (7.0 inches). The months of January and February 2024 combined for 154.9 mm (6.1 inches).

For residents and visitors planning outdoor activities in Toronto, these 2024 precipitation patterns suggest that late summer and mid-spring require more weather flexibility, while October offers the most reliably dry conditions. The city averaged approximately 103.8 mm (4.1 inches) of precipitation per month, though individual months varied significantly from this average.

Question 4

What is the sunniest time of year in Toronto?

Accepted Answer

Toronto enjoys its sunniest weather during July, which recorded 349.5 hours of sunshine in 2024—the peak of the year. The summer months from June through August are by far the brightest period, accumulating a combined 912.9 hours of sunshine.

July stands out as the clear leader, followed by August with 294.1 hours and September with 290.3 hours. These three months offer the best conditions for outdoor activities, with average temperatures ranging from 18.5°C to 21.6°C (65.3°F to 70.9°F). Even early autumn in Toronto remains remarkably sunny, making September an excellent month for visitors seeking pleasant weather without peak summer crowds.

In contrast, winter brings significantly fewer daylight hours. January is Toronto's darkest month with just 44.2 hours of sunshine—a difference of over 305 hours compared to July. The winter months of December, January, and February average only 94.5 hours of monthly sunshine combined.

Overall, Toronto received 2,431.4 hours of sunshine across 2024. For those planning outdoor activities, festivals, or sightseeing in Toronto, the period from May through September offers the most consistent sunny conditions, with each month exceeding 268 hours of sunshine.

Question 5

When does spring really start in Toronto?

Accepted Answer

Spring in Toronto typically begins in March according to the meteorological calendar, but true spring-like weather doesn't fully arrive until late April or early May. Based on 2024 data, March still experienced freezing temperatures with lows reaching -7.1°C (19.2°F), while April saw overnight lows dip to -0.8°C (30.6°F).

The transition from winter to spring in Toronto is gradual. In 2024, average temperatures rose from 0.2°C (32.4°F) in February to 3.0°C (37.4°F) in March—a modest increase of 2.8°C (5.0°F). The most significant warming occurred between April and May, when average temperatures jumped by 6.6°C (11.9°F), reaching 13.6°C (56.5°F) by May.

May 2024 marked the first month when overnight lows stayed consistently above freezing at 5.1°C (41.2°F), with daytime highs reaching 24.6°C (76.3°F). The month also delivered the most sunshine, with 253.6 hours of sun compared to just 156.4 hours in March.

For visitors planning a trip to Toronto, late April through May offers the most reliable spring weather. The spring season (March through May) in 2024 averaged 7.9°C (46.2°F) overall and received 374.1mm (14.7 inches) of precipitation, so packing layers and rain gear remains essential during this transitional period.

Don Vale

Ontario

Wind

Weather Map

FAQ

What is the annual temperature range in Toronto?

What is the weather like in Toronto in December?

How much total rainfall did Toronto receive in 2024?

What is the sunniest time of year in Toronto?

When does spring really start in Toronto?