The Monday blues aren't set to get much brighter if the weather forecast is anything to go by.
A mini-heatwave took many by surprise this weekend with some basking in the late September sun.
But that's all set to change with Brits warned to brace for torrential downpours and thunderstorms as October looms.
More than two inches of rain could fall in some areas with the worst affected regions to expect up to 60mm of rain to fall amid travel chaos and a risk of flooding, the Met Office warns.
And the heavy rain looks set to settle with some areas forecast for downpours right up until the weekend, the Mirror reports.
The Met Office has warned of a drastic shift in the weather from Monday bringing 'heavy rain and blustery winds as it pushes in from the west across the UK'.
Nicola Maxey, at the Met Office, said a cold front will cross the UK from East to West on Monday bringing -"potentially heavy rain".
"Hail and thunder is also a risk to the North and West, so Monday heralds a real change to autumnal-style weather," she added.
Met Meteorologist Adam Thornhill said the change is due to "a shift in the position of the jet stream".
He said: "However, a shift in the position of the jet stream brings a change in our weather [this] week, allowing a cold front associated with a low-pressure system in the North Atlantic to spread eastwards bringing wet and windy conditions across the whole country throughout Monday.
"Behind the cold front, conditions will feel much more autumnal with a cooler feel and blustery showers for many".
The Met Office's five day weather forecast currently says people can expect an autumnal week with lower temperatures, occasional wind and rain.
Today, heavy rain clearing to the east, longest-lived for northern Scotland, with blustery conditions for a time. Cooler conditions elsewhere spreading across the UK with heavy blustery showers, mainly in the west.
While tonight will be mostly dry across eastern areas with scattered showers in west and south, which will be heavy at times. Windy with some strong gusts near showers, particularly in the northwest.
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