Shows average date of occurrence of the first frost in autumn. Data for period 1941-1970. Companion sheet to Frost-Free Period, Heating Degree-Days, Growing Degree-Days and Last Frost in Spring.
List of 5th Edition Maps
List of Map Archive Collections
Download full size map ( 5,963 KB JPEG, 5355 x 4730 pixels )
Download Map in PDF ( 6,190 KB, Adobe Acrobat Reader required )