The Holmdel 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.
Mostly cloudy
Mostly sunny
Mostly sunny
Mostly sunny
Sunny
Mostly sunny
Mostly sunny
79° on Nov. 16, 1993, the hottest reading for this week of the year since 1874. Next is 78° in 1973.
Holmdel’s center stands about 110 ft above sea level. Within three miles the land runs from 50 ft to 350 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Beacon Hill, about 430 ft, 3 miles northwest.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 49×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay, sand. Age: Early Miocene, 16 to 23 million years old. About 5 mi of the line.
Sand. Age: Late Cretaceous, 66 to 72 million years old. About 3 mi of the line.
Sand, clay. Age: Late Cretaceous, 66 to 72 million years old. About 3 mi of the line.
Sand. Age: Late Cretaceous, 66 to 72 million years old. About 2 mi of the line.
Sand. Age: Late Cretaceous, 72 to 84 million years old. About 2 mi of the line.
Sand. Age: Late Cretaceous, 84 to 87 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 8 smaller units along the line are not listed.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Holmdel reaches New York Harbor and the Atlantic Ocean by way of Hop Brook, Big Brook, the Swimming, the Navesink and the Shrewsbury: about 20 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Holmdel; river miles along the main stem, rounded.
Holmdel has a humid subtropical climate. Summer afternoons average 87° in July; winter nights fall to about 23° in January. About 49 inches of rain fall in a normal year.
On November 14 Holmdel normally reaches 57° and falls to 36°. The record high is 76°, in 1993; the record low 20°, in 2019. The most rain on this date, 0.85 in, fell in 2008.
Normals 1991–2020 and records since 1874 at Freehold-Marlboro, 4 miles west-southwest. NOAA, through RCC-ACIS.
