The Met Office says hot and humid weather will arrive in time for the weekend once cool and rainy conditions clear
Britons will have to endure another chilly day – with temperatures barely rising into the mid teens in places – before basking in the hottest temperatures of 2019 so far.
The UK will be among the chilliest countries in Europe on Wednesday with highs around 13C in the north and just 17C in the south.
But there will be a dramatic shift from Thursday as it begins to feel increasingly warm and humid – with the Met Office predicting 28C on Saturday – the first day of June – and possibly 30C on Sunday.
It will be a sizzling weekend in central and southern parts of the UK, especially in the south-east corner, where Norwich and London could be among the hottest places, according to forecasters.
Temperatures plunged to -3.5C in Tulloch Bridge in the Scottish Highlands as there was widespread air frost in Scotland overnight.
The Met Office said at least 14 of its observation sites in Scotland fell below freezing.
Drivers were contending with fog during the morning commute in parts of Yorkshire and Lincolnshire.
Wednesday got off to a bright start in many central and eastern areas, but cloud and rain will arrive from the west as temperatures remain around the mid teens across the country.
The Met Office said heavy rain will fall over western hills and it will become breezier in the afternoon.
It will be mild overnight as rain continues in the north and the south stays mostly dry.
Thursday will feel warn and humid in the south with highs of 23C, but temperatures in the north will stay in the mid teens with outbreaks of rain.
Friday will bring similar conditions before the weather becomes increasingly warm and humid at the weekend.
Saturday – the first day of June – and Sunday are expected to be very warm in the south-east.
Highs of 28C on Saturday and possibly 30C on Sunday are expected, said Met Office spokesman Grahame Madge.
He said the likely candidates are places such as Norwich and north London.
He added: “So Sunday looks very much as though it’s going to be a warmer day than Saturday. So we have got that warmth coming through.”
“Once this warm front, and the air behind it, starts to pull across the UK then we will see temperatures starting to rise.”
There will be rain at times in the north and west, and Sunday will bring a risk of thunderstorms in England and Wales.
UK temperatures are set to be higher than holiday hot spots Barcelona, Ibiza and Saint- Tropez.
But it appears it will be short-lived, with cooler temperatures and stormy conditions likely next week.
The Met Office said: “Cooler fresher conditions already in the northwest will spread south-east to most, if not all parts by Monday.”
“During next week, cooler, changeable conditions are likely across the UK, especially the northwest.
“However, periods of wet and sometimes windy weather are likely to affect many areas, with occasional heavy, thundery showers possible anywhere during this period.”
Temperatures for June will be “near normal or warm overall for the time of year, warmest conditions most likely in the south-east”, the Met Office added.
Met Office five-day weather forecast
It’s a bright start for many in central and eastern areas, but cloud and rain will arrive from the west through today.
There will be some heavy bursts over western hills, and it will become breezier into the afternoon.
Rain continuing for many in the north.
In the south it will be a drier picture, with the rain mainly restricted to the western sides of hills.
A mild night.
Rather cloudy with outbreaks of rain, heaviest on western hills, where extensive low cloud and hill fog is likely.
Drier further east with some bright spells.
Feeling warm and humid.
Friday to Sunday
Increasingly warm and humid and potentially hot in the southeast at the weekend.
Rain at times in the north and west.
Risk of thunderstorms in England and Wales on Sunday.