The best months to visit Switzerland are August and July. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Switzerland: January 4°C / 79mm; February 9°C / 73mm; March 9°C / 83mm; April 11°C / 91mm; May 15°C / 119mm; June 19°C / 111mm; July 21°C / 107mm; August 23°C / 105mm; September 15°C / 89mm; October 14°C / 86mm; November 8°C / 91mm; December 4°C / 93mm.