The best months to visit Saint Helena, Ascension and Tristan da Cunha are November and December. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Saint Helena, Ascension and Tristan da Cunha: January 23°C / 5mm; February 23°C / 5mm; March 24°C / 8mm; April 23°C / 6mm; May 21°C / 6mm; June 19°C / 8mm; July 18°C / 5mm; August 18°C / 5mm; September 18°C / 4mm; October 18°C / 3mm; November 19°C / 3mm; December 20°C / 3mm.