May in San Isidro de El General is the rainiest and the cloudiest month of the year. In May, the weather in San Isidro de El General is typically warm. Average daily high temperature in May is about 23 degrees above zero. On average, San Isidro de El General has 31 rainy days in May. The rains are usually heavy. May as well as April, June, July, and August is considered the most uncomfortable time to visit San Isidro de El General.