The sunny weather has been replaced by grey clouds and heavy rain fall.
The strong showers follow a scorching few weeks, after the Met Office reported it has been the sunniest spring on record for the UK - and the driest May on record in England.
After sunshine basked the country, with temperatures reaching heights of 28C over the weekend, the public can now expect drops to as low as 10C.
In England, spring 2020 recorded 696 hours of sunshine which exceeded the previous record set of 594.3 hours.
But now, as summer is set to make its arrival, the Met Office suggest conditions will feel closer to spring as temperatures are set to "take a tumble".
The country is to be battered by heavy showers, with rain expected in Scotland, Northern Ireland, England and Wales on Wednesday.
And it's unlikely temperatures will be any higher than 20C in most areas.
In many parts, including the South West and Midlands, the maximum temperature could be as low as 11C or 12C, and further north the mercury could struggle to get above 10C.
Met Office forecaster Alex Deakin said: "Big changes with the weather for Wednesday. Compared to recent days it's going to be much, much cooler, some places five, maybe ten degrees lower.
"It's also going to be a lot cloudier and in some places there will be some wet weather as well, that rain fairly heavy."
Met Office forecaster Matthew Box reiterated Mr Deakin's forecast but added it could be "actually quite cold", as some ares may experience a 10 degree drop.
He said: "We're saying goodbye to the prolific temperatures of mid-20s almost nationwide, and now we're seeing something returning much more to normal, or even actually quite cold for the time of year to be honest, depending on where you are in the UK."
For Merseyside, the showers are expected to stick around for the rest of the week.
UK five day weather forecast
Some southernmost areas may start bright and fairly warm but cloudy skies will continue southwards, accompanied by outbreaks of rain, which will be heavy in places.
Brighter skies follow to the north and far west later and it will beuch cooler and breezy for many.
In Liverpool, there will be heavy rain changing to overcast in the afternoon.
Rain and showers clearing southern areas, leaving quite a lot of dry, cool conditions.
The odd shower continuing to affect some areas, especially exposed parts of Scotland.
A mixed day: some sunshine but equally quite a lot of cloud, and a cool northerly breeze.
Many areas seeing one or two showers, the odd heavier one by afternoon.
In Liverpool, the cloudy weather will change to light showers by lunchtime.
Outlook for Friday to Sunday:
Becoming wet and very windy across the north Friday, extending south turning to heavy showers for many Saturday.
Liverpool will experience showers on Friday.
The UK will see sunny spells in the north on Sunday, but showers elsewhere. Cool.