Snow's been falling for most of the night in parts of south-east Wales, and the Met Office says there's more to come.
An amber 'be prepared' warning will remain in place until 9am, with a yellow warning of ice across the whole country.
Cardiff and Vale University Health Board has cancelled the majority of outpatient appointments.
David Wood reports from Porth, in the Rhondda.
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Sunny spells will develop but the winds will be strong, especially along the coast and over high ground. The odd light shower is likely too.
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It'll be a mainly dry but chilly night for most of us with a risk of patchy frost, fog and low cloud later.