The best months to visit Canada are May and August. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Canada: January -5°C / 73mm; February -3°C / 58mm; March 3°C / 72mm; April 11°C / 90mm; May 19°C / 88mm; June 23°C / 100mm; July 26°C / 97mm; August 25°C / 90mm; September 20°C / 95mm; October 13°C / 99mm; November 6°C / 83mm; December -1°C / 79mm.