In reply to ramon marin martinez:
Ramon,
I climbed there in the first week of September last year and it was fine. Mostly in T shirt - some without but can get funny winds up the valley so can be a bit cold even. (one day). I'd say youre hitting it at just the right time of year. Nice canoing down the river as well from the 101 local places and great crepes in St. Etiene.
The stuff is steep but not too hard to OS if youre looking to push this aspect. It also ranges in length with Gullich being short and Tennesse sector being longgggg. There are also some major soft touches like Arnaque.com if youre looking for a hard RP.