Britons are likely to enjoy the warmest Halloween on record with temperatures expected to reach 21C.
The warm weather continues a "remarkable year" of high temperatures, weather experts have said.
The mercury could hit an unseasonably warm 21C (70F) in the South East, eight degrees higher than is normal for this time of year. Words: PA
So far, 2014 is the warmest year on record, following consistently mild temperatures which have continued into autumn, weather forecaster MeteoGroup said.
But October alone will not break any records, despite being both warmer and wetter than average.
Laura Caldwell, a forecaster, said: "Today is expected to break the record to date for the last day of October.
"Right across England and Wales it will be warm but we think it could get up to 21C in the South East - that's about seven or eight degrees warmer than average.
"It's been fairly warm for an October in general.
"The whole year to date has been the warmest on record so far. It's been a remarkable year for above-average temperatures."
Nine out of the 10 months this year have seen above average mean temperatures, with only August having been below average, the Met Office said.
But while the weather has been warm, the hours of sunshine were around 15 per cent below average.
Rainfall has also been 16 per cent higher than average up to the 28th of the month.
There were some regional variations, with parts of Scotland, the Isle of Man and Cumbria much wetter than average while Wales was drier.
Next week the weather will begin to cool and temperatures will return to the average of around 10 or 11C for November.
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