Climate
With average temperatures reaching 30C in July and only 10C in January, spring and autumn are the best seasons for making the river cruises. Because of the tall mountains and gorges, the long and narrow valleys seldom get enough sunshine and feature strong wind, therefore the valley is humid and often shrouded in cloud and mist. In summers, dramatic thunderstorms and torrential rains often happen and heavy rainfalls cause the high water between July and September (Which is usually coincided with the high water season (flood season) on the cruising itineraries). The winters are short and cold.
Clothing
Day Wear
Casual shipboard attire or "day wear" and conservative apparel for sightseeing
Light jackets, jeans, T- shirts and lightweight windbreaker for springs and autumns, a light sweater (for cooler days)
More cotton T-shirts alternatives, shorts for hot summers plus hats, sunglasses, suntan lotions Comforters, sweaters in winters
Comfortable walking shoes / sandals / sneakers
Dress Code on Board
Most ships will have two formal nights including the Captain's Welcome Cocktail Party and Dinner. Some of the luxury lines, like Regal China, Victoria and East King & Queen have the Captain's Farewell Dinner. For these dinners, formal attire is expected: jacket and tie for gentlemen and dresses or pantsuits for ladies are recommended. However, you may rent a Tuxedo on the ship if you would like.
