The best months to visit Ireland are July and August. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Ireland: January 7°C / 70mm; February 10°C / 58mm; March 10°C / 59mm; April 13°C / 66mm; May 17°C / 67mm; June 17°C / 74mm; July 18°C / 76mm; August 19°C / 79mm; September 17°C / 70mm; October 14°C / 79mm; November 11°C / 86mm; December 10°C / 76mm.