October to April: the exterior window
The stretch from late October to early April is the only period when villa exterior painting in the UAE is genuinely comfortable and technically ideal. Daytime surface temperatures sit inside the paint's application range, humidity is moderate, and crews can work full days on scaffolding without heat-stress breaks. This is when boundary walls, parapets, pergolas and full villa envelopes should be done, and every landlord and community manager knows it — which is why exterior painters book out weeks ahead in November and December.
Practical advice: if your villa exterior is chalking (a powdery residue when you rub the wall), cracking at the parapets, or streaked below the AC condenser lines, get quotes in September and book for October or November. Waiting until March means competing with everyone who had the same idea, and April risks the first serious heat arriving mid-job.