The best months to visit Serbia are October and September. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Serbia: January 6°C / 45mm; February 13°C / 44mm; March 15°C / 52mm; April 20°C / 55mm; May 22°C / 70mm; June 29°C / 76mm; July 31°C / 68mm; August 31°C / 54mm; September 24°C / 55mm; October 19°C / 49mm; November 10°C / 48mm; December 6°C / 52mm.