In August, the weather in Usole-Sibirskoe is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Usole-Sibirskoe has 16 partly cloudy, 10 sunny, and 5 rainy days in August. The rains are usually moderate. August as well as June is considered the most comfortable time to visit Usole-Sibirskoe.