The mild southerly air stream, from as far south in the Atlantic as the Canaries, raised the temperature to a maximum of 10.6C at 12.53. This was 3.5C above average and the second warmest day this month.
During the early afternoon cloud built up and minimised the sunshine but there was no rain.
The thermometer fell steadily overnight to a minimum of 2.1C at 06.46, Wednesday morning, that had recovered to 2.7C at 08.00.
The air became saturated overnight as the temperature fell forming fog that at 08.00 limited visibility to 100m.
Update on Thursday at 18.25: temperature peaked at 14.41 with a maximum of 12.5C being 5.4C above average. Warmest day since 28th November.