A weather system which usually bathes Greece and Turkey in sunshine has been pushed thousands of miles north-west by high pressure, meaning temperatures in Britain could exceed those in Hawaii.
Though Yorkshire can expect some cloud cover today, temperatures will climb through the week and could be the highest for this time of year in a quarter of a century.
Chris Tubbs, chief forecaster at the Met Office, said: “Temperatures could be unseasonably warm in places, certainly well above average for this time of year.
“The settled weather is set to last for several days and could carry on into the start of October, giving us a welcome respite from the windy and wet conditions which have dominated for the past few weeks.”
After the coldest July and August since 1993, the sunshine will allow an unexpected final chance for people to enjoy gardens and parks before the leaves turn for autumn, or even head to the beach.
Jonathan Powell, senior forecaster at Positive Weather Solutions, added: “Temperatures at this time of year should really be 59F to 63F at best, so these values are way above the average.
“If this high had been positioned over the UK during late July and August, it is quite feasible that record temperatures could have been achieved.”
The hottest October temperature on record is 84.9F.