WINTER chills are set to sweep the country as temperatures plunge to -4C with frost, sleet and freezing winds to hit this weekend.Forecasters say Brits can enjoy the last of the warm sunshine tomorrow before an icy blast from the north hits on Sunday.Wintry showers and even snow is expected to fall on the hills of Scotland in the afternoon while temperatures plunge overnight, bringing a cold start to next week.Meteorologists say balmier conditions felt this week are moving south across the Channel today making way for a cold night tonight, but tomorrow will remain dry and sunny.Met Office forecaster Ollie Claydon, said: "There's a bit of a warm spell across the UK today with a warm front lingering in the South."Low cloud is making conditions warmer but there will be showers in the far North of Scotland."It'll be mild in the South today with top temperatures of around 18 to 19C, if the sun pokes through."There could be some rain in the Midlands with some better spells up North. "Into this evening, that front that's lingering in the south will push further south into the continent leaving us with a nice day tomorrow."But it'll make way for a colder evening and Wales and the North of England could see some grass frost."Tomorrow day will be a cracking day for Friday with fine and dry weather everywhere, so it'll be a nice day for everyone."Feeling colder though as this cool air is brought in, so we should see highs of 15 to 16C in the South."Saturday morning will by cloudy and we could see some drizzle, which will move into the North and spread eastwards."The best chance of dry weather will be in the South and East with top temperatures of 16 to 17C."Moving into Sunday, wind will pick up for the North East as a low pressure develops."Sunday will be a predominantly dry day for many and the next movement is some colder air far north of Scotland."There we could see wintry showers and slushy sleet on higher grounds in the afternoon."Going into Sunday night, it will be cold with lows of -4C in some exposed rural areas."Forecasters say the weather will be "changeable" from Monday, with strong winds, clouds and outbreaks of rain as November sees more "unsettled conditions".Another forecaster added: "Into the start of November we will continue to see unsettled weather with rain and strong winds at times, interspersed with brighter and showery conditions."At times it will feel cold, especially in the north and east where there is a risk of snow over the hills of Scotland."However, as we head into November, it may turn more settled in the south, leading to bright, chilly conditions and a risk of frost and fog overnight."Brits have enjoyed unseasonably warm weather this week, with the mercury reaching 18C in London yesterday.But it's not to last as forecasters say a change in wind direction will see an area of low pressure from the Atlantic collide with colder air from the north.Aspokesperson for The Weather Channel told Wales Online: "Over the next few days, an area of low pressure will move from the south of Iceland to Scandinavia by Thursday, pushing bands of rain west to east across the UK and Ireland.Channel 4 forecaster Liam Dutton said as we move into November, the nights will start to feel colder and frostier.He said: "Frosty nights and hill snow for UK to start November. "October has been a generally mild month for much of the UK."It's also been unsettled, with rain and brisk winds at times. "However, November will start on a colder note, with frost nights and hill snow likely."For much of October the wind has been coming from a mild south to south-west direction."Early November will see the wind coming from a north to north-west direction. "This will bring cold air across much of the country from the Arctic."As Arctic air arrives, temperatures will tumble into the beginning of November. Daytime temperatures are likely to struggle to get higher than 10C for much of the UK."Temperatures at night are likely to get close to or a little below freezing - especially in rural areas."As temperatures tumble, showers will start to turn wintry over the hills and mountains in the north."The greatest chance of hill snow will be from North Wales northwards across the UK."With the ground still relatively warm, any snow is only likely to settle over the higher mountains."As temperatures tumble away, the typical late autumn weather hazards of frost, fog and ice will arrive."Frost and ice will mean morning of scraping car windscreens and watching out for icy patches."Fog will reduce visibility, slowing down travel and potentially causing airport delays."We pay for your stories! Do you have a story for The Sun Online news team? Email us at [email protected]. uk or call 0207 782 4368. We pay for videos too. Click here to upload yours.