On Fri, 28 Mar 2008 at 20:31:41, David Mitchell
wrote in uk.sci.weather :

For a really cold late March spell, the w/c 16/3/06 takes a lot of
beating. The average Max for the week was just 7.1C - exceptionally
low for these 'ere parts, and 3.3C lower than the Easter '08 Bank
Holiday period.

BTW, does Penzance ever record maxima below 10C after the end of March?

Not counting the late autumn months, obviously.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)