It is now October and time to think about the end of the growing season in Central Iowa. The National Weather Service issues frost advisories and freeze warnings during the growing season. The normal first freeze dates in Iowa occur from late September in far northwest to late October in the southeast. The National Weather Service in Des Moines issues frost advisories and freeze warnings until the end of the growing season.
Here is a map of when the National Weather Service in Des Moines will stop issuing frost and freeze products in the fall. The map also shows the dates of the nearby National Weather Service County Warning Areas frost and freezing product policies. A hard freeze is widespread freezing temperatures of 28 degrees F or below. If a hard freeze occurs before the given dates, frost and freeze products will no longer be issued at the point. If no hard freeze occurs by the dates given, then frost and freeze products will no longer be issued for the balance of the fall.
Frost and freeze products will resume when the growing season starts next spring.