Mount Dillon in South Roscommon was the warmest place in Ireland yesterday Monday February 25th when temperatures reached 17.3 degrees Celsius.
The highest February temperature ever recorded in Ireland was 18.1 degrees on February 23rd, 1891 at what is now Casement Aerodrome outside Dublin.
Elsewhere in Ireland, it was 16.5C in Claremorris, 16.3C in Gurteen, Co. Tipperary, 16.0C in Valentia, Co. Kerry and 15.8C in the Phoenix Park Dublin.
The unseasonably warm weather is caused by a high pressure currently over continental Europe which is feeding up warm air from the Iberian peninsula.
Temperatures are due to drop back from Thursday with unsettled weather forecast for the weekend.
