Like many others we go early Oct to mid Nov and March-April and our recollection is that Oct/Nov is very warm (last October is was very very hot), the apartment windows are all open and fans are on throught the night to cool us down during this period and rain, if it happens, is warm ! In Mar/Apr some evenings can be cool especially if you are near the coast and maybe having dinner overlooking the sea.
We normally wear a fleece jacket for the trip from the UK, (Manchester in Oct and March can be a little cool !) and this is used if necessary rather than take winter woolies that you are unlikely to need.
Regards Chris