Issued 1896-June 1909 by the Pennsylvania Section of the Climatological Service (1896-Jan. 1906, Climate and Crop Service) of the Weather Bureau, U.S. Dept. of Agriculture; 1914-65, by the U.S. Weather Bureau.
Data for July 1909-1913 published in Monthly weather review. Data for Jan. 1914-June 1948 also in U.S. Weather Bureau. Climatological data for the United States by sections.