October 29

1896 Arcola Post Office in Laramie County, was established as Hereford Post Office on April 13, 1896. The location was changed to Arcola on October 29, 1896.

1917 On October 29, 1917, the mercury at Soda Butte plunged to 33 degrees below zero—a U.S. record for the month of October.