The summit of Waiʻaleʻale features a tropical rainforest climate (Köppen Af), with substantial rainfall throughout the course of the year. quotes per year figure as being the 1912-45 average, an average that quite possibly will have changed since then, while The National Climatic Data Center quotes this figure as a 30-year average. The Weather Network and The Guinness Book of Weather Records quotes rain per year, while quotes as the average annual rainfall at Mount Waialeale and claims falls here. Similarly, The Weather Network and the Guinness Book of Weather Records quote 335 days with rain here while suggests that rain falls on 360 days per year.