Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Amman (Petra) emerges as the optimal September destination with an overall TripTiming Index of 70/100 vs 49/100 for Cairo (+21 point advantage). Amman (Petra) captures optimal environmental comfort with 28°C daytime feels-like temperatures and 1% rain probability, compared to 33°C in Cairo. Urban navigability is also slightly smoother and more predictable. While Cairo retains an edge in Space & Crowds (71/100 vs 66/100), Amman (Petra)'s commanding performance in Weather Comfort secures the overall September recommendation.