The Iowa Colony 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.
Partly cloudy
Showers likely
Showers likely; cooler
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
90° on Nov. 16, 2025, the hottest reading for this week of the year since 1930. Next is 87° in 2005.
Iowa Colony’s center stands about 50 ft above sea level. Within three miles the land runs from 40 ft to 70 ft, a difference of 30 ft: nearly flat ground.
Under the town center the state geologic map shows Beaumont Formation, areas predominantly clay (clay, silt), from the Pleistocene, less than 2.6 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 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.
Clay, silt. Age: Pleistocene, less than 2.6 million years old. About 12 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 9 mi of the line.
Sand. Age: Pleistocene, less than 2.6 million years old. About 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 Iowa Colony reaches the Gulf of America by way of West Fork Chocolate Bayou and Chocolate Bayou: about 30 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Iowa Colony; river miles along the main stem, rounded.
Iowa Colony has a humid subtropical climate. Summer afternoons average 93° in July; winter nights fall to about 46° in January. About 56 inches of rain fall in a normal year.
On November 14 Iowa Colony normally reaches 73° and falls to 54°. The record high is 86°, in 2025; the record low 31°, in 1940. The most rain on this date, 2.76 in, fell in 1998.
Normals 1991–2020 and records since 1930 at Houston William P Hobby Airport, 17 miles north-northeast. NOAA, through RCC-ACIS.
