The unexpected January thaw melted most of the snow.
Неожиданная январская оттепель растопила большую часть снега.
Definitions
A January thaw refers to a period of unseasonably warm weather that occurs in January, often resulting in the melting of snow and ice. This phenomenon can provide a temporary respite from winter conditions, typically characterized by a rise in temperatures that contrasts with the usual cold of the month.