John Hall wrote in news:
:

snip
http://www.personal.dundee.ac.uk/~ta..._in_august.htm

quotes -4.5C for 21st August, 1973 at Lagganlia, Grampian, but I imagine
that may well be a rather elevated site and hence not what the OP was
after.

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. 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.

--
Bewdley, Worcs. ~90m asl.