The UK had its wettest day ever earlier this month - and more rain will come later in October after a fine weekend.
Storm Alex brought enough rain to fill Loch Ness on Saturday October 3, the Met Office said.
Data from the national weather service show the day after the storm was the wettest day in records dating back to 1891.
Rainfall was widespread, with an average of 31.7mm (1.25 inches) falling across the whole of the UK and beating the previous record of 29.8mm (1.17 inches) on August 25, 1986.
And more wet and windy weather will continue to hit in the latter stages of October, albeit after a fine and dry weekend.
The odd shower may hit on Saturday and Sunday, but most of the country will enjoy clear skies and sunshine.
However, next week heavy rain returns to many areas, the Met Office said.
Downpours will spread across the UK on Monday and Tuesday.
And the BBC's long-range forecast suggests even more wet weather is to come towards the end of the month as we approach Winter.
The wettest day ever on October 3, 2020, comes after the UK recorded its hottest day ever in 2019.
Mark McCarthy, head of the Met Office National Climate Information Centre, the volume of rain that fell across the UK was more than the capacity of Loch Ness, the largest lake in the country by volume, holding 7.4 cubic kilometres of water.
Mr McCarthy added: "It is exceptional to have 30 to 50mm or more of rain falling so extensively across the UK - from the south coast of England to the north coast of Scotland - in a single day."
Climate change is increasing the risk of more extreme weather, such as more intense heavy downpours, scientists warn.
Grahame Madge, a climate spokesman for the Met Office, said: "The UK's rainfall record contains many extreme events but it is clear from the UK's climate projections that with warmer, wetter winters and hotter, drier summers we can expect increasingly more extreme rainfall records toward the end of the century.
"There is a simple relationship between a warmer atmosphere and an increased amount of moisture in the atmosphere - this again suggests that the UK is likely to witness increased rainfall and more record-breaking events."
The Met Office said the start of October has been very wet, with the UK overall already having 68% of its average rainfall for the month.
Today:
Most areas dry with variable cloud and sunny spells, sunniest in the west. A few light showers, these mainly across eastern and central parts. Feeling chilly.
Tonight:
Cloudy across many central and eastern areas with a few light showers. Clearer skies further west allowing frost and a few fog patches to form in some places.
Saturday:
Mostly dry but many areas cloudy, the best chance of sunshine in the west. Some light rain or showers in places, mainly in central and northeastern parts. Remaining rather chilly.
Outlook for Sunday to Tuesday:
Isolated showers but most places dry and bright Sunday. Outbreaks of rain, heavy in places, spreading across the whole UK during Monday and Tuesday.
