The Allen 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.
Chance of showers
Mostly cloudy
Mostly cloudy
Mostly sunny
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Partly cloudy
Partly cloudy
76° on Nov. 11, 2020, the hottest reading for this week of the year since 1893. Next is 72° in 1902.
Allen’s center stands about 1,810 ft above sea level. Within three miles the land runs from 1,530 ft to 2,050 ft, a difference of 520 ft: hilly country. The highest named summit within 15 miles is Bliven Hill, about 2,320 ft, 14 miles south.
Under the town center the state geologic map shows Machias Formation (shale, siltstone, sandstone), from the Late Devonian, 359 to 384 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 17×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, siltstone, sandstone. Age: Late Devonian, 359 to 384 million years old. About 22 mi of the line.
Shale, sandstone. Age: Late Devonian, 359 to 384 million years old. About 2 mi of the line.
Sandstone. Age: Late Devonian, 359 to 384 million years old. About 0.3 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 Allen reaches Lake Ontario by way of Rush Creek and the Genesee: about 110 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Allen; river miles along the main stem, rounded.
Allen has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 13° in January. A normal year brings about 72 inches of snow; with the rain, that comes to about 40 inches of water.
On November 14 Allen normally reaches 48° and falls to 29°. The record high is 71°, in 1902; the record low −2°, in 1905. The most rain on this date, 0.90 in, fell in 1972.
Normals 1991–2020 and records since 1893 at Angelica, 6 miles south, 340 ft lower. NOAA, through RCC-ACIS.
