Weather expert Alan O'Reilly has pinpointed exactly when a "blast of cold air" will hit Ireland and send the mercury plummeting.
The change in temperature will hit on Sunday and last a few days. Mr O'Reilly also warned the public against putting away the winter coat just yet.
He said: "If you feel inspired to get the garden furniture out and put away the winter coat you might want to hold off. The weather models are showing a late blast of cold Northerly air heading our way from Sunday for a few days! Animation shows upper air temp forecast."
