Large swathes of the country from East Devon to Kent and inland across parts of the Midlands have already seen twice the average rainfall for the month.
More than 175.2mm has fallen between January 1 and 28 this year in the South East and Central Southern England, beating the previous record of 158.2 mm set in January 1988.
Rainfall in South West England - where villages have been left devastated by persistant flooding since Christmas - and South Wales, reached 222.6 mm this month - making January 2014 the fifth wettest on record and the wettest since 1995, when 224.4 mm fell.
It comes just a day after the Government agreed to send the Army into Somerset amid fears of a further storm on Friday.
On Wednesday, following a meeting of the Cabinet Office's emergency Cobra committee, Owen Paterson, the Environment Secretary, agreed to send in the army to help families hit by the flooding on the Somerset levels.
The Met Office said the damaging winds and rain are being driven by an unsually strong jet stream, which has brought wet conditions since the beginning of December .
Forceasters warned of more rain on Thursday and Friday and said there was no sign of a dry spell as we move into February.
A spokesman for the Met Office said the UK as a whole had seen a large amount of rain in January.
© PAFlooded fields around the River Tone are seen from Windmill Hill in Somerset
"We have seen quite a contrast from south to north across the UK, with Northern Scotland having received 85% of its long-term average rainfall so far this month, a sharp contrast to the 200% over Southern England."
But the spokesman said the wet weather had been accompanied by milder temperatures.
The mean temperature across the UK up to January 28 was 4.9C, 1.2C above average.
"Looking at the winter season so far, the whole of the UK is on target for a wetter than average winter," he added.
"The main reason for the mild and wet weather so far is that we have seen a predominance of west and south-west winds, bringing in mild air from the Atlantic - as well as the unsettled and at times stormy conditions."
he South East and Central Southern England is already seeing its 6th wettest winter since 1910 and the wettest weather since 1995, when 369.7mm of rainfall was recorded.
The wettest winter on record was in 1915 with 437.1mm of rainfall.
It's almost like saying 'this was the coldest month of 2014'