In reply to Toerag:
Just got back from Ulassai this weekend with my daughter and non climbing wife - temperature definitely on the warm side (up to 30+) but differing orientation of the crags allowed us to get ok(though obviously not optimal!) climbing conditions in mornings and late afternoons / evenings.
Very impressed, lots of good climbing in the 6s and 7s , easy access from the village, lovely scenery and really friendly people. Would imagine September particularly with lower sun could give pretty decent conditions.