January in El Salvador is the rainiest and the windiest month of the year. In January, the weather in El Salvador is typically warm. Average daily high temperature in January is about 24 degrees above zero. On average, El Salvador has 27 sunny, 3 partly cloudy, and 1 rainy day in January. The rains are usually light. January as well as February, March, April, and September is considered the most comfortable time to visit El Salvador.