May weather forecast
Toronto, Canada

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 last month of the spring, May, is a moderate month in Toronto, Canada, with average temperature varying between 8.8°C (47.8°F) and 15.4°C (59.7°F).

Temperature

In Toronto, Canada, the average high-temperature increases, from a chilly 8.8°C (47.8°F) in April, to a moderate 15.4°C (59.7°F). In May, the average low-temperature is 8.8°C (47.8°F).

Humidity

The average relative humidity is 76%.

Rainfall

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

Snowfall

May through October are months without snowfall.

Sea temperature

In Toronto, in May, the average water temperature is 5.8°C (42.4°F).
Note: Swimming in 5.8°C (42.4°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in May is 14.7h.

Sunshine

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

UV index

In May, the average daily maximum UV index in Toronto is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for the average person.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Toronto?

In May, the average relative humidity is 76%.

How many days does it rain in May in Toronto?

In May, in Toronto, Canada, the rain falls for 14.8 days. Throughout May, 48mm (1.89") of precipitation is accumulated.

When it does not snow in Toronto?

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

Does it snow in Toronto in May?

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

How cold is the water in May in Toronto?

In Toronto, the average seawater temperature in May is 5.8°C (42.4°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Toronto have in May?

In May, the average length of the day in Toronto, Canada, is 14.7h.

How long on average sun shines in May in Toronto?

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

How high is the UV index in May in Toronto?

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.

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

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%

Months with the highest relative humidity are January and February (83%).
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).
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).
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: 14.7h

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in May: 9h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 3.2h).

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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

Months with the highest UV index are July and August (UV index 6).
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

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

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