May weather forecast
Toronto, Canada

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Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign
Colorfully lit night city of Toronto, Canada, with a view of the Nathan Phillips Square, and a large Toronto sign

Weather in May

The gradual warming trend continues into May, with the transition into summer well on its way. With more outdoor activities available, the city feels alive with street fairs, art shows, and al fresco dining. Both locals and tourists flock to the numerous parks and nearby trails for walks, bike rides, and picnics. Make the most of the moderate weather, before the heat wave of summer overtakes Toronto. May is also known for being a great month for birdwatching as numerous migratory species pass through the city.

Temperature

The arrival of May in Toronto signals an increase in the average high-temperature, moving from a chilly 8.8°C (47.8°F) in April to a mild 15.4°C (59.7°F). Toronto experiences a mean temperature of 8.8°C (47.8°F) during May nights.

Humidity

In May, the average relative humidity is 76%.

Rainfall

In Toronto, during May, the rain falls for 14.8 days and regularly aggregates up to 48mm (1.89") of precipitation. Throughout the year, there are 136.8 rainfall days, and 420mm (16.54") of precipitation is accumulated.

Snowfall

In Toronto, snow does not fall in May through October.

Sea temperature

In May, the average sea temperature is 5.8°C (42.4°F).
Note: Swimming in 5.8°C (42.4°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In Toronto, the average length of the day in May is 14h and 44min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:20 pm. On the last day of May, in Toronto, sunrise is at 5:38 am and sunset at 8:51 pm EDT.

Sunshine

In May, the average sunshine in Toronto is 9h.

UV index

The average daily maximum UV index in May in Toronto is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 4 during May morphs into the following directions:
Take necessary precautions - Defending against sun damage is advocated. When the Sun is at its strongest around midday, find shade and limit exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

What are the temperatures in Toronto in May?

The average high-temperature and low-temperature in Toronto during May are 15.4°C (59.7°F) and 8.8°C (47.8°F) respectively.

What is the average humidity in May in Toronto?

The average relative humidity in May in Toronto is 76%.

How many days does it rain in May in Toronto?

In Toronto, Canada, during May, the rain falls for 14.8 days and regularly aggregates up to 48mm (1.89") of precipitation.

When it does not snow in Toronto?

May through October are months without snowfall.

Does it snow in Toronto in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the sea water temperature in May in Toronto?

In Toronto, the average seawater temperature in May is 5.8°C (42.4°F). Swimming in 5.8°C (42.4°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in May in Toronto?

The average day length in May in Toronto is 14h and 44min.

When are sunrise and sunset in May in Toronto?

In May, on the first day of the month, sunrise is at 6:08 am and sunset at 8:20 pm. On the last day of the month, in Toronto, Canada, sunrise is at 5:38 am and sunset at 8:51 pm EDT.

How many hours of sunshine does Toronto have in May?

In May, the average sunshine duration in Toronto is 9h.

What is the UV index intensity in May in Toronto?

The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Toronto, Canada

Average temperature in May - Toronto, Canada
  • Average high temperature in May: 15.4°C

The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (-2.3°C).

  • Average low temperature in May: 8.8°C

The months with the highest average low temperature are July and August (18.4°C).
The coldest month (with the lowest average low temperature) is January (-7°C).

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Average pressure in May
Toronto, Canada

Average pressure in May - Toronto, Canada
  • Average pressure in May: 1015.3mbar

The month with the highest atmospheric pressure is March (1018.4mbar).
The month with the lowest atmospheric pressure is June (1013.1mbar).

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Average wind speed in May
Toronto, Canada

Average wind speed in May - Toronto, Canada
  • Average wind speed in May: 13.3km/h

The windiest month (with the highest average wind speed) is January (19.5km/h).
The calmest month (with the lowest average wind speed) is July (11.7km/h).

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Average humidity in May
Toronto, Canada

Average humidity in May - Toronto, Canada
  • Average humidity in May: 76%

The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are August and September (74%).

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Average rainfall in May
Toronto, Canada

Average rainfall in May - Toronto, Canada
  • Average rainfall in May: 48mm

The wettest month (with the highest rainfall) is July (53mm).
The driest month (with the least rainfall) is February (19mm).

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Average rainfall days in May
Toronto, Canada

Average rainfall days in May - Toronto, Canada
  • Average rainfall days in May: 14.8 days

The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (5.6 days).

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Average snowfall in May
Toronto, Canada

Average snowfall in May - Toronto, Canada
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (57mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in May
Toronto, Canada

Average snowfall days in May - Toronto, Canada
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in May
Toronto, Canada

Average sea temperature in May - Toronto, Canada
  • Average sea temperature in May: 5.8°C

The best month for swimming (with the highest average sea temperature) is August (22.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).

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Average daylight in May /
Average sunshine in May
Toronto, Canada

Average daylight in May / Average sunshine in May - Toronto, Canada
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in May: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in May
Toronto, Canada

Average sunshine days in May - Toronto, Canada
  • Average sunshine days in May: 13.9 days

The month with the most sunshine days is March (16.2 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index in May
Toronto, Canada

Average UV index in May - Toronto, Canada
  • Average UV index in May: 4

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in May
Toronto, Canada

Average cloud cover in May - Toronto, Canada
  • Average cloud cover in May: 38

The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in May
Toronto, Canada

Average visibility in May - Toronto, Canada
  • Average visibility in May: 9km

The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).

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Toronto, Canada

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