The best months to visit Cayman Islands are February and January. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Cayman Islands: January 28°C / 31mm; February 27°C / 19mm; March 29°C / 24mm; April 30°C / 23mm; May 31°C / 97mm; June 30°C / 105mm; July 31°C / 63mm; August 32°C / 89mm; September 31°C / 140mm; October 30°C / 206mm; November 28°C / 117mm; December 28°C / 50mm.