Markham weather in May
Long-run climate averages for Markham, Ontario in May, plus what the forecast models say for the days ahead.
In May, Markham averages 20°C by day and 9°C at night. The wettest month is usually April.
May in Markham averages a daytime high of 20°C and an overnight low of 9°C, which reads as mild for this part of the world. Across the whole year Markham sees roughly 1059 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Markham forecast with every model compared and how much they currently agree.
Markham weather by month
what to expect in Markham through the yearHere 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.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Markham, scoring 86/100 on our CheckWeather Score, ahead of the Env. Canada at 75. See the full CA accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Markham in May?
Is May a good time to visit Markham?
Does it rain a lot in Markham in May?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .