Chengdu has a sub-tropical climate with an annual average temperature of 16.2 degree Celsius, and rainfall of 1.000 millimeters, and a frost-free period of about 300 days. The best time to visit is between March and June or between September and November.
Jiuzhaigou has long enjoyed fame as a legendary °Fairyland and Earthly Paradise" with its wonderful landscape of impressive mountains and lakes. However, in this little bit of paradise, warm clothing is essential throughout the year and temperatures here are extremely variable!
The scenery in Juzhaiguo is impressive all year round but the most popular time to visit is between spring and autumn when the maple leaves are on the trees and the rainfall is minimal.
Average Monthly Temperature(°C)
| City | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| Chengdu | 5.6
| 7.6 | 12.1 | 17 | 21.5 | 23.7 | 25.8 | 25.1 | 21.4 | 16.4 | 12 | 7.3 |
| Jiuzhaigou | -3.7
| 1.2 | 2.7 | 11.3 | 12.7 | 15.5 | 17.7 | 16.4 | 13.8 | 8.8 | 5.4 | -2 |