The best months to visit Argentina are September and April. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Argentina: January 30°C / 88mm; February 30°C / 98mm; March 28°C / 100mm; April 21°C / 104mm; May 15°C / 76mm; June 17°C / 75mm; July 14°C / 75mm; August 16°C / 72mm; September 24°C / 80mm; October 25°C / 119mm; November 28°C / 96mm; December 28°C / 88mm.