The Gilmanton 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
Mostly sunny; warmer
Partly cloudy
Partly cloudy
Partly cloudy
Partly cloudy
Showers likely
73° on Nov. 13, 1999, the hottest reading for this week of the year since 1908. Next is 72° in 1953.
Gilmanton’s center stands about 780 ft above sea level. Within three miles the land runs from 730 ft to 1,280 ft, a difference of 550 ft: hilly country. The highest named summit within 15 miles is Eagle Peak, about 1,310 ft, 3 miles southwest.
Under the town center the state geologic map shows Cambrian, undivided (sandstone), from the Cambrian, 487 to 542 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 34×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Cambrian, 487 to 542 million years old. About 14 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 10 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 Gilmanton reaches the Gulf of America by way of the Buffalo and the Mississippi: about 1,750 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gilmanton; river miles along the main stem, rounded.
Gilmanton has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 7° in January. A normal year brings about 53 inches of snow; with the rain, that comes to about 36 inches of water.
On November 14 Gilmanton normally reaches 45° and falls to 27°. The record high is 72°, in 1990; the record low −7°, in 1916. The most rain on this date, 0.60 in, fell in 1931.
Normals 1991–2020 and records since 1908 at Mondovi, 6 miles north. NOAA, through RCC-ACIS.
