In article ,
David Buttery writes:
I don't know anything about Lagganlia, so I don't know whether that fits.
If it's an inhabited place, even a tiny one (see Altnaharra) then I'll take
it.

It's inhabited. See http://www.lagganlia.com/

Alan White below you says it's 260m, which doesn't seem excessive. In
any case, the same site gives -4.4°C for Grantown-on-Spey, so the
difference is tiny even if Lagganlia doesn't count.

I should, of course, have looked at that site of Trevor Harley's before
asking my question. It's been said before, but is worth saying again, what
an excellent site that is.

Indeed.

ISTR that somewhere there's a site that gives the highest and lowest
temperatures recorded in the UK for each day of the year, but I couldn't
find it again.
--
John Hall "Never play cards with a man called Doc.
Never eat at a place called Mom's.
Never sleep with a woman whose troubles
are worse than your own." Nelson Algren