July in Colonia del Sacramento is the rainiest and the coldest month of the year. In July, the weather in Colonia del Sacramento is typically warm. Average daily high temperature in July is about 13 degrees above zero. On average, Colonia del Sacramento has 13 sunny, 13 partly cloudy, and 5 rainy days in July. The rains are usually heavy. July as well as August is considered the most uncomfortable time to visit Colonia del Sacramento.