April in Monrovia is the cloudiest month of the year. In April, the weather in Monrovia is typically hot. Average daily high temperature in April is about 28 degrees above zero. On average, Monrovia has 26 rainy and 4 partly cloudy days in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Monrovia.