In terms of precipitation, rainfall in Wewak ranges from 4.7 - 16.5 inches per month. April is typically the wettest month, when rainfall can reach 16.5 in. August is typically the driest time to visit Wewak when rainfall is around 4.7 in.
If weather is an important factor for your trip to Wewak, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).