Visiting local bars in Wewak is more fun in good weather. These rainfall averages and temperatures can help you decide the best time for bar hopping. The hottest months are usually May and October with an average temp of 80°F, while the coldest months are February and January with an average of 80°F. The rainiest months in Wewak are March, April, December, and November, with each month seeing an average of 15 inches of rainfall.