The best time to visit Waterloo
Month-by-month climate averages for Waterloo, Ontario, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Waterloo is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest April rain is behind you.
Waterloo is warmest in July (highs near 26°C) and coldest in February (lows around -6°C), with roughly 987 mm of precipitation across the year and April the wettest month. The sweet spot for most visitors is May, June, July and August. Expect overnight frost in January, February, March and December.
These are long-run averages. For the actual days you are travelling, check the live Waterloo forecast — and note how much the models agree, because that tells you how much to trust it.
Waterloo weather by month
what to expect in Waterloo through the yearHere is Waterloo's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Waterloo by season.