In reply to jemmaflower:
http://www.ffme.fr/escalade/page/falaises-et-sites-naturels-d-escalade-d-es...
This link will list many places to climb in France.
I can recommend Ceou, near Castelnaud in the Dordogne. The topo is sold in the campsite shop, below the crag.
It will be hot this time of the year.
The Vercours has some good crags - near Grenoble.
Spain will be hot too. If you go there you will probably want to be up in the Pyrenees. There is some decent sport climbing in the valleys above Benasque. Guide books available in the big climbing shop called Barrabes, in the main street through Benasque.
If bad weather comes in, there is good climbing at Terradets, Villanova De Meia and Rodellar, further south.
Barrabes will probably have guidebooks to these crags as well.