I've been trying to find some climatological averages for many
European City's that are to a 10th of degree accuracy.

Keith,

The World Weather Information Service website gives averages to one decimal
place (and forecasts from many nat. meteorological services). This site is run
by Hong Kong Observatory under the auspices of the World Met. Org.; I regard it
as the official site for climate aves.

URL is http://www.worldweather.org/

Julian
Julian Mayes, West Molesey, Surrey.