The best time to go on a Nile cruise is between October and April. It’s not too hot, which is important since you’ll be hopping on and off to visit temples along the way. The heat in Aswan and Luxor is intense, and it’s not recommended that you travel during the peak summer months from June through August. The average temperatures hover over the 100 F (40 C) mark, and it’s even hotter when you’re inside some of the tombs. Plus, there’s not a lot of shade around.