The best time to visit St. Catharines
Month-by-month climate averages for St. Catharines, Ontario, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit St. Catharines is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest September rain is behind you.
St. Catharines is warmest in July (highs near 26°C) and coldest in February (lows around -6°C), with roughly 928 mm of precipitation across the year and September 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 St. Catharines forecast - and note how much the models agree, because that tells you how much to trust it.
St. Catharines weather by month
what to expect in St. Catharines through the year, 1991-2020 averagesHere is St. Catharines'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 St. Catharines by season.