The UK is bracing for a drop in temperatures as a northerly wind brings Arctic air, dropping highs to 3-8 degrees Celsius and potentially leading to widespread ground frost by Monday. While sunshine is expected this week, forecasts indicate the possibility of wintry showers, especially in Scotland and northern England, where snow may blanket higher elevations. Although colder weather is on the way, precise snowfall predictions remain uncertain, with the likelihood of precipitation varying across regions over the coming days.