Commuters have been warned heavy snow could cause further disruption as the Arctic blast set to hit north and mid Wales on Thursday.
The Met Office has warned of power cuts and said rural communities could become cut off when its yellow weather warning comes into force at 00:00 GMT.
Up to 15cm (6in) of snow is forecast, with temperatures dropping to freezing.
It comes after 200 schools were shut on Wednesday after 10cm (4in) of snow fell in south, west and mid Wales.
Drivers, cyclists and pedestrians have also been warned of wet surfaces becoming slippery overnight.
There is an ice and snow weather warning covering most of Wales in place until 07:00 on Thursday.
Although the southern parts of Wales saw the worst of the weather overnight on Tuesday and into Wednesday, the coldest temperature of -4C (24F) was recorded at Capel Curig in Snowdonia.
Now the Arctic blast is forecast to settle over the north of the country, as well as Scotland and northern England. The Met Office warning also covers mid Wales, where up to 15cm (6in) is forecast to fall over higher ground.
Traffic Wales has urged drivers to carry an emergency kit with them after the Met Office warned the weather could leave vehicles stranded.
While the snow caused disruption for motorists, parents and schoolchildren on Wednesday, many in Wales have been enjoying the snow and sharing pictures on social media.
Payton and Ashton Dolbear, aged 1 and 3, from St Mellons, were out on Caerphilly mountain with their parents on Wednesday morning.
“This is Payton’s first ever snow,” said mum Amy Dolbear.
“They woke dad up screaming”, she added.
Mrs Dolbear said she thinks Payton “likes the idea of snow but not the cold”.
The Dolbears said they had tried to buy a sledge but found they were all sold out.
“The earliest any of the shops has a sledge is next week,” said Mrs Dolbear.
“They want one now.”
What were the roads like in Wales?
Both the mountain roads over the Rhigos – the A4061 between Treherbert and Hirwaun – and the Bwlch, between Abergwynfi and Nantymoel were shut.
There was congestion on the M4 eastbound in Carmarthenshire as engineers undertook an emergency pot hole repair at junction 18 for Llanelli.
The A44 in Powys closed northbound at Llandegley after a crash.
Flights from Bristol Airport had earlier been suspended due to the snowfall, with a “snow clearing operation” taking place. The airport is reporting some residual delays.
Source – BBC News