The best months to visit Isle of Man are August and July. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Isle of Man: January 5°C / 98mm; February 7°C / 80mm; March 7°C / 73mm; April 9°C / 61mm; May 14°C / 58mm; June 13°C / 68mm; July 15°C / 69mm; August 16°C / 82mm; September 14°C / 87mm; October 11°C / 118mm; November 8°C / 127mm; December 8°C / 115mm.