April in Forster is the rainiest month of the year. In April, the weather in Forster is typically warm. Average daily high temperature in April is about 21 degrees above zero. On average, Forster has 13 rainy, 13 sunny, and 4 partly cloudy days in April. The rains are usually heavy. April as well as January, February, and June is considered the most uncomfortable time to visit Forster.