Northern Ireland: -17.5 (Magherally, Co Down 1979)
He said snow and frost would become less of a feature in the future.
"The famously cold winter of 1962-63 is now expected to occur about once every 1,000 years or more, compared with approximately every 100 or 200 years before 1850," he said.
The Met Office added that global warming had prevented this winter from being even colder.
In December across the whole of the UK, the average temperature was 3.1C - 1.1 degrees below the long-term average for this time of year.
The following month it was 2.8C - 0.6 degrees below average, and in February the average temperature was 0.2 degrees above average at 3.6C.
Drivers faced wretched conditions across Britain in early February
The lowest night time minimum temperature this winter was recorded in Aviemore in the Scottish Highlands at -18.4C.
Benson in Oxfordshire recorded -11.8C followed by Shap Fell in Cumbria at -11.3C and South Farnborough in Hampshire at -10.8C.
The lowest ever recorded temperature in the UK was -27.2C in Braemar, Aberdeenshire, in 1895 and 1982, and in Altnaharra, Sutherland, in 1995.
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