The Syosset 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.
Partly cloudy
Mostly sunny; warmer
Partly cloudy
Sunny
Sunny
Mostly sunny
Mostly sunny
77° on Nov. 15, 1993, the hottest reading for this week of the year since 1948. Next is 72° in 2001.
Syosset’s center stands about 210 ft above sea level. Within three miles the land runs from 70 ft to 330 ft, a difference of 260 ft: rolling country. The highest named summit within 15 miles is High Hill, about 420 ft, 4 miles east.
Under the town center the state geologic map shows Monmouth Group, Matawan Group and Magothy Formation (clay, sand, gravel), from the Late Cretaceous, 66 to 100 million years old.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 57×. 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, gravel. Age: Late Cretaceous, 66 to 100 million years old. About 20 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
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.
Syosset has a humid subtropical climate. Summer afternoons average 84° in July; winter nights fall to about 26° in January. A normal year brings about 26 inches of snow; with the rain, that comes to about 43 inches of water.
On November 14 Syosset normally reaches 54° and falls to 40°. The record high is 68°, in 2005; the record low 24°, in 2019. The most rain on this date, 1.91 in, fell in 1972.
Normals 1991–2020 and records since 1948 from the New York-Kennedy Airport Area threaded record (Jfk International Airport, 19 miles southwest, 200 ft lower). NOAA, through RCC-ACIS.
