The Great Wall offers a timeless charm to tourists, but scenery varies with seasons. Visit it in different time you will get a quite different scene.
Most of the popular sections of the Great Wall are located around Beijing, so the following is written with Beijing's climate in mind, although temperatures are likely to be colder and rainfall more as the Great Wall is on the mountains.
In spring, when trees and plants turn green, the wall wanders among the lush vegetation. Every thing looks so fresh. It is a good time to avoid the tourist crowds in summer and autumn. Expect temperatures from 10 to 25ºC (50-77ºF).
Summer comes and the blooming flowers and colored leaves dot the mountains. The Great Wall snakes its way like a silver necklace, standing out clearly in the strong mountain sunlight.
The Beijing Great Wall usually enjoys blue skies and temperatures over 25ºC (77ºF) in summer. However, July and August are the months when most of the year's rain falls, so bring waterproofs in case.
When fall comes, the mountains are blanketed by colors of red, golden, yellow and brown, creating an amazing view and the weather during this time is pleasant. ( See best places to see fall colors in Beijing) This season is often recommended as the best season to visit. Expect temperatures from 10 to 20ºC (50-68ºF).
The mountains and the wall itself are often covered with snow in winter, offering an awesome snowy scene. The weather in this time of the year will be freezing or very cold and tourists are much fewer. Expect temperatures from 0 to 10ºC (32-50ºF). During the Chinese New Year period (uaually takes place in late January and early February), the Badaling Section of the wall is crowded with Chinese tourists.