Icy stretches are likely to appear in Cheshire, Halton and Merseyside between 8pm tonight and 11am tomorrow, according to the Met Office.
Experts warned that people should expect some injuries from slips and falls on icy surfaces, and icy patches on some untreated roads, pavements and cycle paths.
They said: "Following rainfall, and some snow, on Saturday surfaces are likely to remain wet and with temperatures widely falling below freezing icy stretches are likely to form."