Summer officially ends today, with the Met Office confirming it as one of the wettest and least sunny of any on record.
With the September equinox tomorrow heralding the start of autumn, figures show an average of 327.3mm (nearly 13in) of rain fell in the UK between 1 June and 31 August, and this month is also proving to be one of the worst.
With floods causing six deaths and tens of millions of pounds of damage, forecasters say an average rainfall of 81.6mm was recorded by 15 September - a total almost equal to the 100.4mm average for the month and on track to rival the worst ever, when 181.8mm was recorded in 1918.
In addition, the UK experienced just 463.9 hours of sunshine up to 31 August, which is below average and included the dullest August since records began in 1929.
September saw only 46.5 sunshine hours during its first 15 days, which could certainly challenge 1945's record worst of 91.4 hours. The normal total is 123.1 hours.
The Met Office blamed the summer washout, the fifth wettest since records began in 1914, on the jet stream: fast-moving, high-atmosphere winds which were further south than usual, preventing the Azores high bringing hot weather from southern Europe.
Spokeswoman Sarah Holland said: 'We predicted this summer would not be very nice, and it hasn't been. August was awful and September has been very wet and dull. There could now be showers on Monday.'
By Caroline Davies