Written in my own words.

The winter of 1963 is in conjunction with 1740 and 1684 the only winters which have managed to achieve two consecutive months with a CET mean below zero in a row. 3 Consecutive CET months with a CET of 0C or below has never been achieved.

December 1962 was cold with a CET of 1.8C and was quite dry and frosty. The intense cold set in on Boxing Day. A high pressure system which had become established over Scandinavia soon collapsed but was replaced by a large one over Iceland which set in some very cold northerly winds. 

Mild air made a somewhat futile attempt to get in close to the end of the month but the air was so cold that it turned to snow and gave a heavy snowfall over the west country and most of south west England.

January commenced with the cold air firmly in place and this persisted for the whole month giving a CET of -2.1C. This was the coldest January of the whole of the 20th Century and was the coldest January since 1814 which had a CET of -2.9C.

The fourth week of January 1963 was the coldest of the whole winter with bitterly cold east winds and the daytime temperature frequently below -5C and in many cases around -7C or even -8C giving a severe daytime frost. In this week many places had very severe night frosts with temperatures down to -15C to -19C.

February was not quite so cold as the January - but it was still a severely cold month with a CET of -0.7C this was the second month in a row with a CET below 0C and the first time this had happened since 1740.

The month was stormy in some places and in the middle of the month there was a severe blizzard which resulted in drifts of over 20 feet high in many areas.

The winter fizzled out by March 6th which was the first night of the year without a frost.

The winter of 1963 was the first of 2 most dramatic weather events of the 20th Century - The second one was the summer of 1976.