In reply to NinaC:
'Bleua... depends. I've been there in late Feb onwards, in blisterin' summer heat and also in the fall.
I would say that I liked it most during early-mid March. Sure, I think we got a few days worth of snow during that time, but not a deal breaker for the month plus we stayed there. But once everything was dry, it was nice, quiet and good temps (not too cold, nor too warm).
For shorter trips, the weather is always going to be a concern... bar the blisterin' warm summer, there is always a change of rain.
Oh, Chirinico (sp?) might also be an option, provided you find housing in the village. Cresciano also (perhaps).
Still, the general rule of thumb is that spring is for bleau. summer for magic wood (or daone). fall for 'bleu, Crescianio and Chirinico. And winter for Albarracin and the newer locale Alcaniz closer to BCN. This is for bouldering though.
Which reminds me, the Canary Island have some climbin' as well. AFAIK both sport and boulder. And I think the distances aren't that bad (A scooter will do, no need for car). Which might also be an option. Less change of rain, but definitely a late fall-winter-early spring location.