July in Warsaw is the sunniest and the hottest month of the year. In July, the weather in Warsaw is typically hot. Average daily high temperature in July is about 31 degrees above zero. On average, Warsaw has 15 sunny, 10 rainy, 4 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as January, February, March, and May is considered the most uncomfortable time to visit Warsaw.