How to select geograph. regions using certain climatological criteria

[mahesh]

It is possible to find load of climatological information on all sorts of countries and cities, but ...

... what I'd like to find: given a certain temperature wanted, an amount of rainfall wanted, what regions have this climate?

Example:
I'd like to know which regions (in Europe) have an average daytime temperature between 24°C and 30°C, average less than 20 mm rainfall in the month of July?

And I would prefer a (geographically) detailed answer. Not: "France" and "Greece", but "the Southern coast of France", "the Greek islands", ...