The prefecture enjoys a cool, temperate, semi-arid, continental climate. Owing to the vast expanse of land, there are also microclimate features in different regions. Generally, summers here are short and the winters, long. The temperature varies greatly between day and night. The temperature in spring rises rapidly but unstably, while the autumn temperatures drop rapidly. Summer and autumn are the best time. The pastures are verdant. Melons and fruits are ripe. Notable is the sunset in Ili River. It is the favorite of many photographers.
The best travel time for Ili is from June to October every year. At this time, tourists can not only enjoy the beautiful natural scenery, but also taste all kinds of fresh seasonal fruits. In the middle of June, when the lavender is in full bloom, the local Lavender Festival will be held; in July, apricot flowers in Kvnes and rapeseed flowers in Monglkvre will also open one after another.