The United States: Rainfall, 1870–1901
A map from 1904 of the United States, showing the averaged annual rainfall for 32 years (1870–1901) measured in inches per year ranging from under 10 inches to 100 inches. From the map prepared by A.J. Henry. ...

Relative Tornado Frequency in the United States, 1888
A map from 1888 of the United States showing the relative frequency of tornadoes, and is color–coded to show frequency ranging from 1 or more to 50 or more tornadoes per year....

November Weather Map of Eastern United States, 1888
A weather map from 1888 of the eastern United States showing a typical weather pattern from a November observation of a cyclone and low pressure system in Iowa as well as associated isobar and isotherm readings and wind directions. The map also shows...

Mean Annual Rainfall in the United States, 1888
A map from 1888 of the United States showing the mean annual rainfall distribution for the region. The map is color–coded to show rainfall ranging from less than 15 inches to more than 60 inches....

Mean Annual Temperature in the United States, 1888
A map from 1888 of the United States showing the mean annual temperatures for the region, given in degrees Fahrenheit. The map is color–coded to show averaged temperatures ranging from less than 40° to more than 70°....

The United States Showing the Surface Structure and Isothermal Lines, 1891
A map from 1891 of the United States showing the physical features of the states, including mountain systems, lakes, rivers, and coastal features. The map is color–coded to show the general areas of highlands and lowlands. Isotherms show mean a...

Condition of the Weather on a certain day in April, 1891
A sample weather map from 1891 of the United States showing typical weather patterns and a storm system for a day in April. The map shows a low pressure system in the Western Plains moving to the northeast, a high pressure system over the coastal Pac...

A Typical Two–Day April Storm Event, 1891
A sample weather map from 1891 of the United States showing a typical storm event for a two day period in April. The map shows a low pressure system originating in the Western Plains near Pike's Peak moving to the northeast and east to Pittsburg, a h...

Track of a Cyclone, 1893
A weather map from 1893 showing the northward progression of a tropical cyclone in August of 1893. The map is keyed to show the isobars over the event, the direction of the storm, storm center, areas of clear weather, areas of partly cloudy weather, ...

Barometric Pressure and Weather, 1896
A map from 1896 of the United States showing the typical combined weather conditions of a cyclonic and anti–cyclonic area. The map is keyed to show isobars adjusted to sea level, isotherms, prevailing wind direction of the upper and surface win...