Chain of Rocks (aka Homer Dyke)



Perpendicular or very steep fall of water in the course of a stream.
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Map Marker

GPS Coordinates

Latitude, Longitude:
38.7591667°, -90.1791667°
Elevation Icon


397 ft. (121 m.)

Topographic Map

US Topo Map

The USGS (U.S. Geological Survey) publishes a set of the most commonly used topographic maps of the U.S. called US Topo that are separated into rectangular quadrants that are printed at 22.75"x29" or larger. Chain of Rocks is covered by the Columbia Bottom, MO US Topo Map quadrant

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Land Icon Land
Man-made Icon Man-made

Nearby Points of Interest

Dam 27 Man-made 0.1 mi
Chain of Rocks Bridge Man-made 0.2 mi
Locks 27 Man-made 0.3 mi
Chain of Rocks Park Man-made 0.4 mi
Interchange 34 Man-made 0.6 mi

Historical Weather

Below are weather averages from 1971 to 2000 according to data gathered from the nearest official weather station. The nearest weather station for both precipitation and temperature measurements is ALTON MELVIN PRICE L&D which is approximately 4 miles away and has an elevation of 430 feet (33 feet higher than Chain of Rocks). Because the nearest station and this geographic feature may have differences in elevation and topography, the historic weather at the two separate locations may be different as well.

Average Daily Temperatures by Month (°F)

Average Monthly Precipitation (in inches)

Month Precip AVG High Temp AVG Low Temp
January 1.99" 36.0° 19.4°
February 2.30" 41.8° 24.0°
March 3.47" 52.5° 33.7°
April 4.16" 64.1° 44.6°
May 4.24" 74.6° 55.0°
June 3.22" 83.7° 64.3°
July 3.49" 88.1° 68.7°
August 3.17" 86.3° 66.4°
September 3.14" 79.1° 58.0°
October 2.70" 67.5° 46.2°
November 3.75" 53.2° 35.4°
December 2.91" 40.7° 24.6°

Summer High Temps

This location's average summer high temps are higher than 58% of other locations on record.

Winter Low Temps

This location's average winter low temps are higher than 51% of other locations on record.

Precipitation Levels

This location's average precipitation levels are higher than 56% of other locations on record.