July in Santarém is the windiest and the sunniest month of the year. In July, the weather in Santarém is typically hot. Average daily high temperature in July is about 29 degrees above zero. On average, Santarém has 24 sunny, 6 partly cloudy, and 1 rainy day in July. The rains are usually light. July as well as June, August, and September is considered the most comfortable time to visit Santarém.