The best months to visit Greece are September and May. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Greece: January 9°C / 56mm; February 12°C / 48mm; March 14°C / 50mm; April 19°C / 28mm; May 20°C / 23mm; June 30°C / 12mm; July 31°C / 7mm; August 30°C / 5mm; September 24°C / 17mm; October 20°C / 28mm; November 13°C / 50mm; December 10°C / 64mm.