The UK is set to see its coldest night of the year this week, with some areas dipping as low as -5°C in an arctic blast.
The Met Office temperatures will drop to -5°C in Scotland and -4°C in the midlands on Saturday night, with day time figures to say in the single digits.
The south coast will also see low temperatures, with some areas reaching lows of -3°C.
They added a widespread frost is likely on Friday and Saturday as arctic air sweeps across the country.
‘Nagging winds’ will hit the North East of the UK, which are forecast to whip up high waves and pose challenged to lorries over the weekend.
A yellow warning has been posted for the Shetland archipelago, where gusts could reach 60mph between 10pm and 6am over the next 24 hours.
A Met Office spokesman said the cold and variable weather is to be expected at this time of year, though the UK has historically had the first frosts in October.
He said: ‘We can see there’s big swings in temperatures, all it takes is a quick change from a southern wind into a north wind to have that change.
‘It’s not unusual to see these changes.’
The Met Office said sleet and snow may fall in the north of Scotland and on peaks above 400 metres (1,312ft) high.
But Saturday is set to be dry – although with a ‘cold feeling’.
The Met Office said: ‘After a cold frosty start, it will be a mainly dry day with light winds and plenty of sunny spells.’
On Sunday, temperatures are set to begin to rise again with some showers possible.
‘A frosty start, then turning cloudier and less cold on Sunday with some rain possible,’ forecasters said.
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