April in Teresina is the coldest month of the year. In April, the weather in Teresina is typically hot. Average daily high temperature in April is about 30 degrees above zero. On average, Teresina has 28 rainy, 1 sunny, and 1 cloudy day in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Teresina.