Freezing air from Russia is pushing a cold front ever closer to Ireland.
Temperatures dropped as low as -3C overnight across parts of the North.
Met Éireann has issued a yellow weather warning for exceptionally cold weather for the remainder of the week.
Met Éireann has a Weather Advisory in place for all of next week into next weekend for cold temperatures, with snow showers from Tuesday.
There is also a Status Yellow warning valid for tonight for Low Temperatures in Leinster & parts of Ulster
Latest info https://t.co/X6NncUghZ9 pic.twitter.com/UYuQ1HNQyy
— Met Éireann (@MetEireann) February 24, 2018
Snow showers are expected from Tuesday onwards, particularly in the east and southeast, with the possibility of more persistent bands of snow developing later in the week.
Farmers are being warned not to be caught out - water supply could freeze and early lambs will need to be kept indoors.