The best months to visit Vietnam are February and December. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Vietnam: January 20°C / 41mm; February 24°C / 29mm; March 25°C / 57mm; April 32°C / 99mm; May 28°C / 236mm; June 29°C / 230mm; July 27°C / 270mm; August 28°C / 324mm; September 26°C / 246mm; October 22°C / 121mm; November 21°C / 59mm; December 18°C / 35mm.