Wamena's climate is characterized by a distinct dry season and wet season. The dry season typically runs from May to September, with temperatures ranging from 18-25°C, making it the coolest period of the year. In contrast, the wet season from October to April sees temperatures rise to an average high of 24°C in March, while the lows remain relatively consistent around 15-17°C. The hottest months are typically February and March, with April experiencing a slight drop in temperature. The region's weather pattern is influenced by its location within the Baliem Valley, where the surrounding mountains create a rain shadow effect that contributes to the dry season.