1963: Unseasonably hot autumn weather peaked on October 5-6 with most stations across about the western two thirds of Iowa tying or breaking their all-time October warm temperature records on one or both of those days. On the 5th Forest City and Shenandoah tied the all-time Iowa October record with a high of 97 F. Other high temperatures reported that afternoon included 96 F at Allison and Webster City, 95 F at Chariton, Des Moines, and Mason City, and 94 F at Ames, Rock Rapids, and Sidney. After a high of 95 F on the 5th Des Moines reported a high of 94 F on the 6th, and aside from these two days the warmest temperature on record at Des Moines in the month of October is 92 F. The warm weather continued for most of October and the first freezes of the season were generally not reported until the final week of the month. In many areas this remains the latest first freeze on record and the month finished as the warmest October on record in Iowa.
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This post was written by Schnack on October 5, 2012