Barcelona vs Dubai
Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.
Barcelona peaks in June, May, October (annual avg 8.3/10). Dubai peaks in January, February, December (annual avg 5.8/10).
Barcelona upper vs Dubai lower
Barcelona — sea
Dubai — sea
Dubai. Visit November through March, when daytime temperatures sit in the low-to-mid 20s and the desert is genuinely pleasant. February and March are the sweet spot — warm enough for the beach, cool enough for desert excursions. June through September is unsuitable for outdoor tourism: 40°C+ daily, heavy humidity off the Gulf, and most outdoor activities effectively shut down.