The Met Office has issued a yellow "be aware" warning of ice for Denbighshire, Flintshire, Powys, Wrexham and Monmouthshire.
It says there could be difficult driving conditions in places.
More top news
Scarlets sealed a famous victory at the Aviva Stadium in Dublin with an emphatic 46-22 victory over Munster in the Guiness PRO12 final.
Welsh holiday makers have been caught up in travel chaos after British Airlines cancel all flights from Heathrow and Gatwick.
A schoolgirl from Pontypridd is back home after being honoured for her fundraising efforts at a star studded ball in London.