The best time to visit Ajax
Month-by-month climate averages for Ajax, Ontario, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Ajax is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest November rain is behind you.
Ajax is warmest in July (highs near 25°C) and coldest in February (lows around -9°C), with roughly 917 mm of precipitation across the year and November 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 Ajax forecast - and note how much the models agree, because that tells you how much to trust it.
Ajax weather by month
what to expect in Ajax through the year, 1991-2020 averagesHere is Ajax'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 Ajax by season.