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Waterloo Weather in May
Waterloo in May averages 19°C (66°F) during the day and 7°C (45°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Waterloo in May
Typically, about 14 days will experience rainfall, with an average of 121 mm (4.8 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Waterloo in May
Daytime temperatures in Waterloo reach 19°C (66°F) in May, dropping to 7°C (45°F) at night. Conditions are often most pleasant around the middle of the day. Nights fall to 7°C (45°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.For Waterloo itself, June, July, August and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Waterloo Temperature in May
Min Temperature
7°C (45°F)
Max Temperature
19°C (66°F)
Chance of Rain
46%
Precipitation
121 mm (4.8 in)
Rainy days
14 days
Waterloo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Waterloo - and find the best time to visit.
Best Places in Canada in May
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Waterloo in May
For Waterloo in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Waterloo in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping3/10 -
Outdoor sports9/10
Waterloo 3-Day Forecast
More climate data for Waterloo
See the full Waterloo climate overview or explore weather in Canada.
Popular in May
Where to go in May - average daytime high across popular destinations.
Niagara Falls
21°C (70°F) Montréal20°C (68°F) Ottawa20°C (68°F) Quebec City19°C (66°F) Calgary17°C (63°F) Vancouver16°C (61°F) Toronto16°C (61°F) Whistler11°C (52°F) Bucket list
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The 5 most beautiful lakes in Canada
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