The best months to visit Monaco are June and May. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Monaco: January 11°C / 67mm; February 13°C / 60mm; March 14°C / 63mm; April 16°C / 80mm; May 18°C / 64mm; June 23°C / 48mm; July 28°C / 26mm; August 29°C / 28mm; September 22°C / 75mm; October 19°C / 110mm; November 15°C / 131mm; December 12°C / 83mm.