In article ,
Alan White writes:

Highest temperature since October 28th 2006 at 15.2°C after a day of
blazing blue sky with a slow reduction in visibility. With the dominant
wind direction ENE, the land rises to 709 metres in about 3 kilometres
hence we're relatively sheltered from that direction.

Could you be getting a fohn effect?
--
John Hall

"I am not young enough to know everything."
Oscar Wilde (1854-1900)