Snow is causing a second day of school closures and travel disruption.
About 20 schools will be shut on Tuesday in Wrexham, Powys, and Denbighshire.
Meanwhile buses replaced trains between Llandudno, Conwy county, and Blaenau Ffestiniog in Gwynedd.
The Met Office has issued six yellow warnings for snow and ice across the UK, with the warning for Wales in place until 10:00 GMT on Wednesday.
Snow started falling across parts of the UK on Monday night, causing more than 140 schools to shut in Wales and several roads to close on Tuesday.
Transport for Wales said 13% of its services had been disrupted due to severe weather on Tuesday.
The UK Health Security Agency also issued the first amber cold weather health alert of the season, warning conditions could be dangerous for elderly and vulnerable people.
