July in Kaluga is the sunniest and the warmest month of the year. In July, the weather in Kaluga is typically hot. Average daily high temperature in July is about 28 degrees above zero. On average, Kaluga has 23 sunny, 5 partly cloudy, and 3 rainy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Kaluga.