March in Mount-Hagen is the rainiest month of the year. In March, the weather in Mount-Hagen is typically warm. Average daily high temperature in March is about 19 degrees above zero. On average, Mount-Hagen has 30 rainy and 1 cloudy day in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Mount-Hagen.