In June, Markham typically sees daytime highs of 23.3°C and overnight lows around 11.8°C. Compared to the annual average high of 11.6°C, June runs +11.7°C.
June in Markham averages a daytime high of 23.3°C and an overnight low of 11.8°C.
June runs +11.7°C compared to Markham's annual average high of 11.6°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 23.3°C and cooler evenings around 11.8°C.