Temperatures are set to plunge to -8C this week as more weather warnings for freezing fog have been issued.
The mercury dipped to -10.3C in parts of the UK on Saturday night, the chilliest weather since February, reports the Met Office.
And it looks like there will be no break from the latest cold snap as temperatures are expected to drop as low as -8C on Wednesday night.
Freezing fog will move in across the southeast of England this morning (Tuesday) with experts at the Met Office warning it could cause slower journey times.
A yellow weather warning has been issued from midnight to 11am today.
Met Office forecaster Alex Burkill told the Mirror Online: "Temperatures overnight dropped to -7C at Shap in Cumbria. Tonight similar temperatures are expected, dropping to -6C in parts England and Wales.
"Tonight (Monday) and tomorrow night we are going to see widespread freezing fog, particularly in central, southern and eastern parts of England.
"The weather will require warnings as it will reduce visibility substantially. There will be some really poor visibility on Tuesday and Wednesday morning."
In Bristol, temperatures will peak at 7C today (Tuesday) when it will remain predominantly cloudy.
But the biting wind will make temperatures feel like 3 or 4C during the day.
Lows of 3C are expected overnight but things could start to warm up by Thursday when the mercury isn't expected to dip below 9C - even at night.
By the weekend, the thermometer will climb back into double figures but wet conditions could move in by the end of the week.
Met Office weather forecast
Tuesday:
Southern districts starting frosty and foggy; only a slow improvement, some places perhaps staying misty and very cold. Further north, mostly dry with variable cloud but drizzly in far north.
Outlook for Wednesday to Friday:
Cold with fog for the south on Wednesday, windy with showers in the north. Mild and windy with rain moving south Thursday, clearing Friday to bright or sunny spells.
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