Ireland’s most northerly point at Malin Head recorded the country’s highest temperature of the day on Tuesday.
The Inishowen weather station recorded a high of 25.7C yesterday.
Dublin the Phoenix Park hit 25.5C, while temperatures were a cool 18.1C further south in Cork.
Weather for rest of the week is set to be warm and a mix of sunny spells and showers.
Tonight will remain dry in most areas of the north west.
Met Eireann forecasters said it will feel close tonight with temperatures ranging from 14-16C.
Thursday will be dry in the morning with bright spells. Some rain is expected in the afternoon.
The forecast says: “In the west it will be cloudy by the afternoon with rain and drizzle. The rain will spread eastwards later but it will become just light and patchy. It will brighten later in the evening with sunshine breaking through. Warm and humid, with maximum temperatures of 18 to 21 degrees.”