The Cumming 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
Partly cloudy; warmer
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
74° on Nov. 11, 2022, the hottest reading for this week of the year since 1951. Next is 71° in 2020.
Cumming’s center stands about 890 ft above sea level. Within three miles the land runs from 860 ft to 990 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Wagon Wheel Hill, about 1,500 ft, 8 miles northwest.
Under the town center the state geologic map shows Michigan Formation (shale), from the Carboniferous, 324 to 359 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 29×. 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. Age: Carboniferous, 324 to 359 million years old. About 15 mi of the line.
Sandstone. Age: Carboniferous, 324 to 359 million years old. About 9 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 Cumming reaches Lake Huron by way of Clear Creek: about 60 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Cumming; river miles along the main stem, rounded.
Cumming has a warm-summer humid continental climate. Summer afternoons average 81° in July; winter nights fall to about 9° in February. About 33 inches of rain fall in a normal year.
On November 14 Cumming normally reaches 44° and falls to 27°. The record high is 65°, in 1953; the record low 3°, in 2019. The most rain on this date, 1.32 in, fell in 1957.
Normals 1991–2020 and records since 1951 at Lupton 1 S, 4 miles northeast. NOAA, through RCC-ACIS.
