July in Sinsk is the sunniest and the warmest month of the year. In July, the weather in Sinsk is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Sinsk has 15 partly cloudy, 9 sunny, 5 rainy, and 2 cloudy days in July. The rains are usually moderate. July as well as June is considered the most comfortable time to visit Sinsk.