The 46mm of rain on the 25th was typical of a spell of very wet weather, especially in parts of the south and west, in the second half of May.
But nationally, the main feature of the month was the low average temperature, making it the coolest May since 1996 almost everywhere.
Up to 14 ground frosts were recorded at Met Eireann inland stations, almost double the normal range for the month.
Taking the May rainfall in conjunction with the April and May conditions, it was the wettest spring since 1994 at Shannon Airport and Valentia Observatory.
But the east escaped much of the rain, and it was the driest spring since 1997 at Casement Aerodrome, with March continuing a succession of relatively dry months extending over the winter period for Ireland generally.
Unusually, the highest spring temperature was recorded in March; Valentia Observatory’s maximum of 20.7°C on March 19th was its highest March temperature since records began there more than 100 years ago.