The Andover 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
Partly cloudy
Mostly sunny
Mostly sunny
Mostly sunny
Mostly sunny
74° on Nov. 16, 1993, the hottest reading for this week of the year since 1888. Next is 73° in 2020.
Andover’s center stands about 420 ft above sea level. Within three miles the land runs from 310 ft to 760 ft, a difference of 450 ft: hilly country. The highest named summit within 15 miles is Paulk Hill, about 1,000 ft, 10 miles north.
The section below crosses 13 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 25×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Arkose, siltstone. Age: Early Jurassic, 175 to 202 million years old. About 5 mi of the line.
Schist, calc-silicate-rock. Age: Neoproterozoic, 542 to 1,000 million years old. About 4 mi of the line.
Gneiss. Age: Neoproterozoic, 542 to 1,000 million years old. About 3 mi of the line.
Gneiss. Age: Neoproterozoic, 542 to 1,000 million years old. About 3 mi of the line.
Gneiss. Age: Middle Ordovician, 459 to 471 million years old. About 2 mi of the line.
Gneiss, schist. Age: Neoproterozoic, 542 to 1,000 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. 7 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 Andover reaches Long Island Sound and the Atlantic Ocean by way of Staddle Brook, the Hop, the Willimantic, the Shetucket and the Thames: about 50 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Andover; river miles along the main stem, rounded.
Andover has a hot-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 19° in January. A normal year brings about 39 inches of snow; with the rain, that comes to about 49 inches of water.
On November 14 Andover normally reaches 51° and falls to 34°. The record high is 67°, in 1902; the record low 10°, in 1905. The most rain on this date, 2.21 in, fell in 1937.
Normals 1991–2020 and records since 1888 at Storrs, 9 miles east-northeast, 240 ft higher. NOAA, through RCC-ACIS.
