July in Ust-Kamchatsk is the warmest month of the year. In July, the weather in Ust-Kamchatsk is typically warm. Average daily high temperature in July is about 17 degrees above zero. On average, Ust-Kamchatsk has 9 partly cloudy, 8 rainy, 8 cloudy, and 6 sunny days in July. The rains are usually moderate.