Not sure how widely known this site is, but I've only just stumbled
across the following:-

http://www.scotland.gov.uk/stats/envonline/keys.asp

where you can find a reasonable amount of data relating to Scottish
climatology, e.g. areal average temperatures since 1857.

Martin.


--
FAQ & Glossary for uk.sci.weather at:-
http://homepage.ntlworld.com/booty.weather/uswfaqfr.htm