The Waimalu plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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60° on Nov. 15, 1974, the coldest reading for this week of the year since 1940. Next is 60° in 1981.
Waimalu’s center stands about 370 ft above sea level. Within three miles the land runs from 0 ft to 1,230 ft, a difference of 1,230 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Kaʻala, about 3,990 ft, 15 miles west-northwest.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR.
Waimalu has a hot semi-arid climate. Summer afternoons average 89° in August; winter nights fall to about 67° in January. About 16 inches of rain fall in a normal year.
On November 14 Waimalu normally reaches 84° and falls to 72°. The record high is 88°, in 1994; the record low 62°, in 1974. The most rain on this date, 4.32 in, fell in 1965.
Normals 1991–2020 and records since 1940 from the Honolulu Area threaded record (Honolulu International Airport, 6 miles south, 360 ft lower). NOAA, through RCC-ACIS.
