In reply to ModerateMatt:
Few mountain top records. The archive section of Heriot Watt's cairngormweather site should provide an appropriate record.
The met office for the rest. There is a station at Aviemore so that should be a good comparitor but it is around 300m and little influence from the west (gulf stream) so typical for high in the Grampians only.
You may struggle to get a western equivalent.
Post edited at 13:57