Britain is going to become “unusually stormy” this week, as experts are predicting Autumn-like weather for the majority of it.

Despite basking in a mini-heatwave of around 30c in some parts of the country just last week, most of us woke up feeling the need to grab a jumper to wear as the Mercury plummeted to no higher than 10c. It is expected to reach a scorching high of just 14c later, but for now, it's going to be pretty cold for today and the rest of the week, according to Exacta Weather's James Madden.

In his latest report, Madden said: “Throughout the upcoming week, we will see low pressure impacting our weather in terms of some cooler and windy weather, particularly across parts of the north and in Scotland and Ireland for in and around Thursday, where it could even become unusually stormy or feel quite autumnal due to some moderate to strong winds at times.

“Additionally, many other parts will also be seeing some quite cloudy and at least some breezy weather at times throughout this week, among some warmer periods when the sun creeps through in places, and the strength of the sun at this time of the year could still turn things quite warm at times in the best of the sunshine and bring temperatures ranging in the low to mid-20s for parts of the south and east.”

Madden puts the cool weather periods down to a “southern-driven jet stream,” but it will eventually give away to more hotter temperatures – and the much-talked-about heat dome we reported on last week.

For its part, the Met Office forecast acknowledged that predictability is typically low for this time of year, compared to the winter months. The unsettled stormy weather follows the forecast that Britain will shortly be hit with biblical rain.

WX Charts predicted the mega deluge will hit the UK around midday on Wednesday, July 5.

Their forecast indicates almost all of the UK will face downpours for up to 48 hours, with parts of southern England having to cope with around 3mm per hour, while the North and North West face around 1mm per hour.

Exacta's weather predictions claim that it'll all start getting hotter around July 8, where a “much warmer airflow” is going to come our way, leading to an “extended period from this pattern change, and it will also place us in an extremely favourable position for high pressure rises and some hot to very hot temperatures on a widespread scale”.

The heat dome weather phenomenon consists of extreme heat that is caused when the atmosphere traps hot ocean air as if bounded by a lid or cap.

Exacta said: “The CFS computer model is now seeing a return of hot to extremely hot weather conditions (potential heat dome) on three consecutive runs for around mid-July! Some early indicators are now filtering through for a major heatwave or heat dome scenario in mid-July!"

Probably worth dipping back into your winter wardrobe for the rest of the week, then grabbing the shorts for next week.