The St. Marys 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.
Sunny
Partly cloudy
Partly cloudy
Chance of showers
Chance of showers
Partly cloudy
Partly cloudy
86° on Nov. 16, 1961, the hottest reading for this week of the year since 1892. Next is 86° in 2018.
St. Marys’s center stands about 20 ft above sea level. Within three miles the land runs from 0 ft to 80 ft, a difference of 80 ft: gently rolling country.
Under the town center the state geologic map shows Princess Anne shoreline complex - barrier island facies (sand), from the Pleistocene, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 5 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 0.8 mi of the line.
Sand. Age: Holocene, less than 12,000 years old. About 0.4 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.
A raindrop that lands in St. Marys reaches the Atlantic Ocean by way of Dark Entry Creek and the Saint Marys: about 14 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of St. Marys; river miles along the main stem, rounded.
St. Marys has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 45° in January. About 50 inches of rain fall in a normal year.
On November 14 St. Marys normally reaches 73° and falls to 56°. The record high is 85°, in 1915; the record low 36°, in 1984. The most rain on this date, 1.95 in, fell in 1954.
Normals 1991–2020 and records since 1892 at Fernandina Beach, 10 miles southeast. NOAA, through RCC-ACIS.
