The best time to visit Markham
Month-by-month climate averages for Markham, Ontario, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Markham is usually May, June, July and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest August rain is behind you.
Markham is warmest in July (highs near 26°C) and coldest in February (lows around -9°C), with roughly 903 mm of precipitation across the year and August the wettest month. The sweet spot for most visitors is May, June, July and September. Expect overnight frost in January, February, March and December.
These are long-run averages. For the actual days you are travelling, check the live Markham forecast - and note how much the models agree, because that tells you how much to trust it.
Markham weather by month
what to expect in Markham through the year, 1991-2020 averagesHere is Markham'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 Markham by season.