Ontario weather

Our guide to the weather in Ontario during May

14

Average high

3

UV Index

105mm

Monthly rainfall

67%

Humidity

Ontario is a huge province in Canada that includes Canada's largest city, Toronto, and the capital city, Otowa. It also includes thousands of square miles of forest. We've looked at the most up-to-date weather data for Ontario, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Ontario weather in May.

What's the temperature like in Ontario during May?

The temperature reaches around 14℃ during the daytime in May, falling away to 3℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it snow in Ontario during May?

Possibly. There's a chance of snow during May but not as much as you might think. Check the local forecast before you leave home so that you can pack appropriate footwear and clothing.

Does it rain in Ontario during May?

On average, there will be 8 rainy days during the month, amounting to 105.4mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in Ontario during May?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in May. With moderate humidity, the wind will feel chilly, so you'll want to wear layers.

Join the club...

Be the first to hear about discounted holidays, flash sales and amazing travel competitions to Ontario!

Ontario Blog posts

From the UK's most popular travel bloggers

...

Cheapest Way to Get From Toronto Pearson Airport to Downtown

27th September 2023 by The World in My Pocket

Once the flight was booked, the travel blogger found themselves pondering the most cost-effective means of transportation from Toronto Pearson Airport to the heart of the city. The flight was scheduled to touch down at midnight, but in reality, it ended up arriving at the ungodly hour of 2 am....

...

Toronto vs New York City – Which Is Better To Visit In 2023?

21st September 2023 by I'm just a girl 16

Last Updated on 14th September 2023, this article comparing Toronto and New York City contains affiliate links. Are you considering a trip to either Toronto or New York City? Maybe you're even contemplating visiting both, but finding it difficult to decide which city to explore first! This comprehensive guide comparing Toronto and New York City will assist you in making that decision....

...

Canada Travel Guide: Toronto, Montreal and Quebec City

10th February 2022 by Two Monkey's Travel

Located in North America is a country famous for ice hockey, the Maple leaf, two widely-celebrated Justins (Bieber and Trudeau), and poutine. If I were to describe it in one word, however, I would say that it’s diverse. The place is populated with people from all walks of life, from Asian and Middle-Eastern to European communities. This variety of cultural backgrounds is translated in their food ranging from Chinese takeaways, kebabs, to pizzas and pasta. That’s Canada, eh....

...

25 things to do in Toronto, Canada

3rd January 2022 by Two Monkey's Travel

Found along Lake Ontario, is the capital of Ontario; Toronto. Though a metropolis full of towering skyscrapers, Toronto has natural attractions including luscious parks. It is considered one of the safest cities in the world even though the population is almost 3 million....

...

Road trip through Quebec

21st April 2021 by Hand Luggage Only

This is the autumn we officially became leaf peepers! 😆😆😆😆 We slightly unintentionally planned our road trip to Quebec around the time when the autumn colours were on full display and it was absolutely brilliant! I say "slightly unintentionally" as although we hoped to be able to catch this beautiful display (in an equally beautiful part of Canada), we thought we'd perhaps left it too late and it turns out, we hadn't. We caught the fall colours just before the...

...

Road trip through Quebec - Part 2

21st April 2021 by Hand Luggage Only

If you missed Part 1, you can find it right here - https://www.youtube.com/watch?v=iEDFxhSkkew We said it before and we'll say it again - Quebec is an absolutely gorgeous part of Canada. This province looks and feels like nowhere else in Canada and it's beautiful all year round but perhaps even particularly more so in Autumn (or Fall, depending on what part of the world you're from). We decided to make the most of it by going on a road trip through Quebec and here's what we got up for...

...

The best places to visit on your first time in Canada

27th December 2020 by PommieTravels

If you’re a nature lover then you’ll love Canada, with its beautiful landscapes, glaciers, lakes and national parks. Canada is the second largest country in the world after Russia, so it can be difficult to know where to visit as a first-timer. Of course you’ll want to try the typical Canadian foods such as poutine and Canadian bacon, and you’ll definitely want to get out into nature and see the wildlife such as moose and bison. But where should you go? In the article below we’ll list...

Weather in Ontario

Our month-by-month guide to the weather and climate in Ontario

-12.7

Ontario weather in

January
-11.4

Ontario weather in

February
-3.8

Ontario weather in

March
3.3

Ontario weather in

April
14.4

Ontario weather in

May
20.7

Ontario weather in

June
24.0

Ontario weather in

July
22.4

Ontario weather in

August
16.1

Ontario weather in

September
7.6

Ontario weather in

October
-0.8

Ontario weather in

November
-9.1

Ontario weather in

December