July in Trbovlje is the warmest month of the year. In July, the weather in Trbovlje is typically warm. Average daily high temperature in July is about 24 degrees above zero. On average, Trbovlje has 20 sunny, 7 rainy, 3 partly cloudy, and 1 cloudy day in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Trbovlje.