The best months to visit Montenegro 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 Montenegro: January 9°C / 178mm; February 12°C / 190mm; March 14°C / 181mm; April 19°C / 157mm; May 21°C / 120mm; June 28°C / 65mm; July 31°C / 40mm; August 32°C / 40mm; September 23°C / 168mm; October 20°C / 212mm; November 13°C / 285mm; December 10°C / 266mm.