The Hilo 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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89° on Nov. 15, 2019, the hottest reading for this week of the year since 1949. Next is 88° in 1996.
Hilo’s center stands about 30 ft above sea level. Within three miles the land runs from 10 ft to 910 ft, a difference of 900 ft: steep hill country. Open water lies within three miles. The highest named summit within 15 miles is Puʻumakaʻala, about 3,700 ft, 15 miles southwest.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR.
Hilo has a tropical rainforest climate. Summer afternoons average 83° in July; winter nights fall to about 64° in January. About 120 inches of rain fall in a normal year.
On November 14 Hilo normally reaches 80° and falls to 68°. The record high is 88°, in 2019; the record low 60°, in 1949. The most rain on this date, 4.46 in, fell in 1990.
Normals 1991–2020 and records since 1949 from the Hilo Area threaded record (Hilo International Airport 87, 2 miles east). NOAA, through RCC-ACIS.
