Average hard-frost dates* 



Based on United States Department of Agriculture Weather Records 



LAST IN FIRST IN 



STATE SPRING FALL 



Alabama, N. W Mar. 25 Oct. 30 



Alabama, S. E Mar. 8 Nov. 15 



Arizona, No Apr. 23 Oct. 19 



Arizona, So Mar. 1 Dec. 1 



Arkansas, No Apr. 7 Oct. 23 



Arkansas, So Mar. 25 Nov. 3 



California 



Imperial Valley. ...... Jan. 25 Dec. 15 



Interior Valley Mar. 1 Nov. 15 



Southern Coast Jan. 15 Dec. 15 



Central Coast Feb. 25 Dec. 1 



Mountain Sections .... Apr. 25 Sept. 1 



Colorado, West May 25 Sept. 18 



Colorado, N.E May 11 Sept. 27 



Colorado, S.E May 1 Oct. 15 



Connecticut Apr. 25 Oct. 20 



Delaware Apr. 15 Oct. 25 



District of Columbia Apr. 11 Oct. 23 



Florida, No Feb. 25 Dec. 5 



Florida, Cen Feb. 11 Dec. 28 



Florida, South of Lake Okeechobee, almost frost-free 



Georgia, No Apr. 1 Nov. 1 



Georgia, So Mar. 15 Nov. 15 



Idaho May 21 Sept. 22 



Illinois, No May 1 Oct. 8 



Illinois, So Apr. 15 Oct. 20 



Indiana, No May 1 Oct. 8 



Indiana, So Apr. 15 Oct. 20 



Iowa, No May 1 Oct 2 



Iowa, So Apr. 15 Oct. 9 



Kansas . Apr. 20 Oct. 15 



Kentucky Apr. 15 Oct. 20 



Louisiana, No Mar. 13 Nov. 10 



Louisiana, So Feb. 20 Nov. 20 



Maine May 25 Sept. 25 



Maryland Apr. 19 Oct. 20 



Massachusetts Apr. 25 Oct. 25 



Michigan, Upper Pen.... May 25 Sept. 15 



Michigan, No May 17 Sept. 25 



Michigan, So May 10 Oct. 8 



Minnesota, No May 25 Sept. 15 



Minnesota, So May 11 Oct. 1 



Mississippi, No Mar. 25 Oct. 30 



Mississippi - , So Mar. 15 Nov. 15 



LAST IN 



STATE SPRING 



Missouri Apr. 20 



Montana May 21 



Nebraska, W May 11 



Nebraska, E Apr. 15 



Nevada, W May 19 



Nevada, E June 1 



New Hampshire May 23 



New Jersey •. Apr. 20 



New Mexico, No Apr. 23 



New Mexico, So Apr. 1 



New York, W May 10 



New York, E May 1 



New York, No May 15 



N. Carolina, W Apr. 15 



N. Carolina, E Apr. 8 



N. Dakota, W May 21 



N. Dakota, E May 16 



Ohio, No May 6 



Ohio, So Apr. 20 



Oklahoma Apr. 2 



Oregon, W Apr. 17 



Oregon, E June 4 



Pennsylvania, W Apr. 20 



Pennsylvania, Cen May 1 



Pennsylvania, E Apr. 17 



Rhode Island Apr. 25 



S. Carolina, N. W Apr. 1 



S. Carolina, S. E Mar. 15 



S. Dakota May 15 



Tennessee Apr. 10 



Texas, N. W Apr. 15 



Texas, N. E Mar. 21 



Texas, So Feb. 10 



Utah Apr. 26 



Vermont May 23 



Virginia, No Apr. 15 



Virginia, So Apr. 10 



Washington, W Apr. 10 



Washington, E May 15 



W. Virginia, W May 1 



W. Virginia, E May 15 



Wisconsin, No May 17 



Wisconsin, So May 1 



Wyoming, W June 20 



Wyoming, E May 21 



FIRST 



IN 



FALL 



Oct. 



20 



Sept. 



22 



Oct. 



4 



Oct. 



15 



Sept. 



22 



Sept. 



14 



Sept. 



25 



Oct. 



25 



Oct. 



17 



Nov. 



1 



Oct. 



8 



Oct. 



15 



Oct. 



1 



Oct. 



25 



Nov. 



1 



Sept. 



13 



Sept. 



20 



Oct. 



15 



Oct. 



20 



Nov. 



2 



Oct. 



25 



Sept. 



22 



Oct. 



10 



Oct. 



15 



Oct. 



15 



Oct. 



25 



Nov. 



8 



Nov. 



15 



Sept. 



25 



Oct. 



25 



Nov. 



1 



Nov. 



10 



Dec. 



15 



Oct. 



19 



Sept, 



, 25 



Oct. 



25 



Oct. 



30 



Nov. 



15 



Oct. 



1 



Oct. 



15 



Oct. 



1 



Sept 



. 25 



Oct. 



10 



Aug. 



20 



Sept 



. 20 



*Allow 10 days either side of above dates to meet local conditions and seasonal differences. 



3 



