- Book tours, activities & experiences with free cancellation
- Receive full refund if you cancel at least 24 hours before
- Use 'Reserve Now & Pay Later' to secure activities today
Ontario weather in May 2023
- 1818°C max day temperature
- 1111 days with some rainfall
- 88°C min night temperature
- 1515 hours of daylight per day
- 0No heat & humidity
- 6969 mm of monthly rainfall
- 77 (High) UV index
- 77°C sea temperature
Below are average maximum temperatures at popular destinations in Ontario in May. Select a destination to see more weather parameters.
Recommended for Ontario
The May weather guide for Ontario (Toronto) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Metric (°C / mm) | Imperial (°F / inches)
More about Canada
How hot is it in Ontario in May?
Daytime temperatures usually reach 18°C in Toronto, Ontario in May, falling to 8°C at night.
How sunny is it in Ontario in May?
There are normally 7 hours of bright sunshine each day in Toronto, Ontario in May - that's 50% of daylight hours.
Is the sea cold around Ontario in May?
The average sea temperature around Toronto, Ontario in May is 7°C.
Does it rain in Ontario in May?
There are usually 11 days with some rain in Toronto, Ontario in May and the average monthly rainfall is 69mm.
Ontario May sunrise & sunset times
Browse the sunrise and sunset times for Ontario in May 2023. Select a month to view Ontario sunrise and sunset times for the next 12 months. The Ontario sunrise and sunset times shown below are for Toronto.
|Date||Sunrise times||Sunset times|
|Monday, 1st May 2023||06:10||20:20|
|Tuesday, 16th May 2023||05:52||20:37|
|Wednesday, 31st May 2023||05:40||20:51|
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Popular travel offers
Explore holidays in the sun for less
- Beach holidays
- Family holidays
- City breaks
- Summer holidays
- Winter sun holidays
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- Airport parking deals
- British Airways
- easyJet holidays
- Love Holidays