UK weather: October could be London’s wettest month for 158 years

London is having one of the wettest months for more than 150 years, the Met Office has said.

October is usually the wettest month in the UK and rainfall this year has largely been concentrated in Greater London, the home counties in south-east England, and a smaller area of north-east Scotland.

The capital has had 139mm of rain up to the 25th, compared with the full month’s average of 78mm.

With rainfall for the final six days of the month yet to be recorded, October 2020 is already ranking ninth rainiest in London since 1862.

Met Office spokesperson Grahame Madge said with ‘considerable rainfall’ expected in the coming days it is ‘quite likely’ this month will break the October record, and potentially for any month.

Mr Madge said: ‘The wettest calendar month on record was November 1940 with 171.2mm of rainfall.

‘(Breaking this record) would require an extra 32mm of rainfall before the month end.

‘On October 3 the UK received an average of 31.5mm on one day, so it is possible. However, we will have to wait before we can say for sure.’

October 3 was the wettest day on record for the UK, with enough rain to fill Loch Ness.

The Saturday, which was just after Storm Alex hit, saw an average of 31.7mm across the nation, beating the previous record of 29.8mm on August 25, 1986.

Although Greater London and the home counties are experiencing a particularly wet October, rainfall around the UK has been only ‘slightly above average’, Mr Madge said.

‘Virtually everywhere was wet on October 3, but since then there have been pockets of the UK which has seen higher rainfall totals, especially London and parts of the south-east,’ he said.

‘This is because of the way the jet stream has steered low-pressure systems more to the south of England.’