In article ,
Philip Eden writes:
Several people have noted that temperature levels over the
last few days have been a good deal higher than had been
predicted before the cold snap began.

As Ian has pointed out, the wind direction seems to have been mostly
north-westerly, whereas the forecast was for more of a straight
northerly IIRC. Perhaps that accounts for it.
--
John Hall
"Hegel was right when he said that we learn from history
that man can never learn anything from history."
George Bernard Shaw (1856-1950)