The best months to visit Sierra Leone are December and January. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Sierra Leone: January 33°C / 13mm; February 36°C / 7mm; March 35°C / 18mm; April 34°C / 46mm; May 31°C / 236mm; June 29°C / 424mm; July 26°C / 598mm; August 27°C / 691mm; September 27°C / 495mm; October 28°C / 297mm; November 29°C / 144mm; December 31°C / 36mm.