Rainfall in the United states, 1921
A map from 1921 of the United States showing areas where there is plenty of rain for successful farming....

United States Weather, 1921
A sample United States weather map from 1921, showing typical symbols found on weather maps at the time, including symbols for clear weather, partly cloudy, cloudy, rain, snow, thunderstorms, wind arrows showing prevailing wind direction, isobar line...

Temperatures in the United States, 6/30/1902
A map from 1906 of the United States showing average temperatures for the month of July, given in degrees Fahrenheit....

Air Pressure and Winds in the United States, April 5, 1901
A map from 1901 of the United States showing typical air pressure and prevailing winds from a sample observed on April 5, 1901. The map is color coded to show regions and centers of low pressure, and shows the directions of the prevailing surface win...

Temperature, Cloudiness, and Rainfall in the United States, April 5, 1901
A map from 1901 of the United States showing typical temperatures given in degrees Fahrenheit, cloudiness and rainfall distribution from a sample observed on April 5, 1901. The map is color coded to show regions of cloudiness and rainfall....

Air Pressure and Winds in the United States, April 6, 1901
A map from 1901 of the United States showing typical air pressure and prevailing winds from a sample observed on April 6, 1901. The map is color coded to show regions and centers of low pressure, and shows the directions of the prevailing surface win...

Temperature, Cloudiness, and Rainfall in the United States, April 6, 1901
A map from 1901 of the United States showing typical temperatures given in degrees Fahrenheit, cloudiness and rainfall distribution from a sample observed on April 6, 1901. The map is color coded to show regions of cloudiness and rainfall....

United States Weather, August 20, 1893
A sample United States weather map for 8 P.M., August 20, 1893, showing typical symbols found on summer weather maps at the time, including symbols for clear weather, partly cloudy, cloudy, and rain, wind arrows showing prevailing wind direction, iso...

United States Weather, December 24, 1893
A sample United States weather map for 8 P.M., December 24, 1893, showing typical symbols found on winter weather maps at the time, including symbols for clear weather, partly cloudy, cloudy, rain, and snow, wind arrows showing prevailing wind direct...

Low Pressure System, February 4, 1889
A map from 1891 showing the typical weather conditions caused by a low pressure system centered over Minnesota on Feb. 4, 1889....