The best months to visit Mexico are December and February. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Mexico: January 20°C / 22mm; February 22°C / 19mm; March 24°C / 29mm; April 25°C / 50mm; May 25°C / 76mm; June 23°C / 154mm; July 21°C / 167mm; August 21°C / 170mm; September 21°C / 178mm; October 20°C / 96mm; November 20°C / 32mm; December 20°C / 16mm.