Hello,
Madrid Cuatro-Vientos if full of pretty good schools where you can do your PPL kinda fast.
Generally June/July weather is perfect (you could have some summer storms like we've had this week) but you can fly all day.
Cuatro-Vientos opens at 9AM and closes at sunset, today the ATIS said 19:48Z (21:48 local time) so you'd have plenty of time to fly and build your hours.
As I said, there're quite a lot of schools there, if you want some specific opinions just let me know. I will be happy to help!
I am actually from Jerez (but I live in Madrid). As far as I remember in Jerez you only have the FTE and the Airclub, which I do not recommend.
Hope this helps