In some cases, such as at Athenry, County Galway and Claremorris, County Mayo weather stations recorded 18.6C and 18.2C respectively which are both 2C higher than previous maximums.
The highest so far this year is 19.2C in Dublin's Phoenix Park but the record still stands as 20.1C in November 2015 at Dooks, County Kerry.
Minimum temperatures have been high too this year with 14.6C at Valentia, County Kerry observed, the third highest on record for the month in Ireland.
In the image, Ballycotton Island Lighthouse in County Cork on a warm, cloudy November day. This lighthouse was painted black in 1902 to distinguish it from the nearby Capel Island Lighthouse.
The forecast is for cooler conditions this week, for a few days, but with a return to warmer weather by next weekend.