I doubt that the Gods have time to control the weather but there were lots of people offering up silent prayers when that rain was tumbling down and the lightning was striking right on the beach all morning.
And then, in the end, the rain cleared, the sun broke through and you could feel the elation start to rise amongst the workers preparing for the concert. For me, it was actually the most emotional and memorable part of the whole day - and the music hadn't even started. (insert the reverse of this emotional rollercoaster for the hotel management people watching from the balconies of their abomination)

By evening, it was the complete dream scenario. Clear skies, shooting stars galore (typ cleared the air making visibility great), the moon, cool temperature, and the lightning flickering in the clouds on the horizon.

Next year i think it would be wise to do it a bit earlier in July when the weather is more stable.