A post office was opened in Barclay in 1873, and remained in operation until it was discontinued in 1955.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Barclay has a humid subtropical climate, abbreviated "Cfa" on climate maps.
- "Barclay, Kansas", Geographic Names Information System, United States Geological Survey, United States Department of the Interior
- Blackmar, Frank Wilson (1912). Kansas: A Cyclopedia of State History, Embracing Events, Institutions, Industries, Counties, Cities, Towns, Prominent Persons, Etc. Standard Publishing Company. pp. 151.
- "Kansas Post Offices, 1828-1961". Kansas Historical Society. Archived from the original on October 9, 2013. Retrieved 22 June 2014.
- Climate Summary for Barclay, Kansas