Weather in Ontario, Canada in May

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Visiting Ontario, Canada in May

The weather in May is significantly warmer than the previous month and temperatures continue to rise at a fast pace into June. May has average maximum temperatures of 11°C (53°F) which is too cold for sunbathing. The sunshine percentage is 52.7% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.9 hours of sunshine per day. It is not a good time for sunbathing in Ontario.

May has total rainfall of 1.1cm (0.4inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

Sea temperatures are a cold 9°C (48°F). May is too cold for swimming in Ontario for any length of time, unless you have a wetsuit. The sea temperature in May is slightly warmer than the previous month.

Consider visiting Ontario in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Can you sunbathe in Ontario in May?

No, May is not a good time for sunbathing in Ontario.

May has average maximum temperatures of 11°C (53°F) which is too cold for sunbathing. The sunshine percentage is 52.7% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.9 hours of sunshine per day. May has total rainfall of 1.1cm (0.4inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

More about May temperature and sunshine.

Can you swim in Ontario in May?

No, May is too cold for swimming in Ontario for any length of time, with the sea water at 9°C (48°F), unless you have a wetsuit.

More about May sea temperatures.

Is May a good time to holiday in Ontario?

No, May is not a good time for a holiday in Ontario.

May has average maximum temperatures of 11°C (53°F) which is too cold for sunbathing. The sunshine percentage is 52.7% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.9 hours of sunshine per day. May has total rainfall of 1.1cm (0.4inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.3 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. It is not a good time for sunbathing in Ontario. Sea temperatures are a cold 9°C (48°F). May is too cold for swimming in Ontario for any length of time, unless you have a wetsuit.

More about the May temperatures and sunshine.

Is Ontario warm in May?

No, Ontario is too cold for sunbathing in May.

The average maximum temperature in Ontario in May is 11°C (53°F). The average maximum temperature is 6°C (42°) in the previous month and 17°C (63°F) in the next month.

The average temperature in Ontario in May is 8°C (46°F). The average temperature is 3°C (37°F) in the previous month and 14°C (56°F) in the next month.

More info about the May temperatures and sunshine.

How sunny is Ontario in May?

The average day light hours per day in Ontario in May are 15. The sunshine percentage is 52.7% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.9 hours of sunshine per day.

More about May sunshine.

Temperature in Ontario in May

The weather in May is significantly warmer than the previous month and temperatures continue to rise at a fast pace into June. The average maximum temperature in Ontario in May is 11°C (53°F). The average maximum temperature is 6°C (42°F) in the previous month and 17°C (63°F) in the next month.

The average temperature in Ontario in May is 8°C (46°F). The average temperature is 3°C (37°F) in the previous month and 14°C (56°F) in the next month.

The average minimum temperature in Ontario in May is 4°C (40°F). The minimum temperature is -1°C (31°F) in the previous month and 10°C (50°F) in the next month.

Sunshine in Ontario in May

The days in May are much longer than the previous month and the days continue to get slightly longer into June. May has more hours of sunshine than the previous month and hours of sunshine continue to rise into June. During May the average day light hours are 15 per day in Ontario. The sunshine percentage is 52.7% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.9 hours of sunshine per day.

The ultraviolet index in Ontario in May is typically 7.8 during May. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Ontario in May

The average sea water temperature in Ontario in May is 9°C (48.2°F) which is very cold and bracing, it's not recommended you swim with out a full wet suit. The sea temperature in May is slightly warmer than the previous month.

Rainfall in Ontario in May

May weather is marginally wetter than the previous month and rainfall continues to rise slightly into June. May has a couple of more days of rain than the previous month and rainy days continue to rise slightly into June. The average total rainfall in Ontario in May is 1.1cm (0.4inches) and on average there are 3.3 rainy days in May making it a very dry time to visit the beach.

Humidity in Ontario in May

The maximum dew point (an indicator of humidity) in Ontario in May is 6°C (43°F) which is a bit dry for some. The dew point is 1°C (34°F) in the previous month and 12°C (12°F) in the next month.

The average maximum relative humidity in Ontario in May is typically 90.3%. The maximum relative humidity is 88.9% in the previous month and 91.7% in the next month.

The average relative humidity in Ontario in May is typically 74.8%. The average relative humidity is 72.3% in the previous month and 77.5% in the next month.

Wind Speed in Ontario in May

The average maximum wind speed in Ontario in May is typically 26KM/H (16MPH). The average maximum wind speed is 28KM/H (18MPH) in the previous month and 22KM/H (14MPH) in the next month.

The average wind speed in Ontario in May is typically 15KM/H (9MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 13KM/H (8MPH) in the next month.

The average wind direction in Ontario in May is from the West-Southwest.

Monthly Averages

Suggested Beaches in May

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