The north west is the subject of a further yellow weather warning for ice, issued by the Met Office.
This warning will come into effect from 4pm this afternoon, Thursday, and it will remain in place through to 10am tomorrow morning, Friday.
Forecasters say that scattered wintry showers may lead to some icy patches and travel disruption.
There is also a risk of injury from slips and falls on icy patches on some untreated roads, pavements and cycle paths.
A Met Office spokesman said: “Scattered wintry showers on Thursday evening will slowly fade overnight, leading to the risk of icy patches on untreated surfaces as temperatures fall below freezing.
“Isolated snow accumulations of 2cm to 4cm will be possible, more especially in Wales on hills above 150m elevation.
“Keep yourself and your family safe when it is icy. Plan to leave the house at least five minutes earlier than normal. Not needing to rush, reduces your risk of accidents, slips, and falls.
“If you need to make a journey on foot, try to use pavements along main roads which are likely to be less slippery.
“Similarly, if cycling, try and stick to main roads which are more likely to have been treated.
“Give yourself the best chance of avoiding delays by checking road conditions if driving, or bus and train timetables, amending your travel plans if necessary.
“Be prepared for weather warnings to change. When a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area.”