Average hard-frost dates* 



Based on United States Department of Agriculture Weather Records 



STATE 



Alabama, N. W. 

 Alabama, S. E. . 



Arizona, No. . . . 

 Arizona, So. . . . 



Arkansas, No. 

 Arkansas, So. 



LAST IN 

 SPRING 



Mar. 25 

 Mar. 8 



Apr. 23 

 Mar. 1 



Apr. 7 

 Mar. 25 



FIRST IN 

 FALL 



Oct. 30 

 Nov. 15 



STATE 



Oct. 



19 



Dec. 



1 



Oct. 



23 



Nov. 



3 



California 



Imperial Valley. . . 



Interior Valley 



Southern Coast . . . 

 Central Coast .... 

 Mountain Sections 



Dec. 15 

 Nov. 15 

 Dec. 15 

 Dec. 1 

 Sept. 1 



Sept. 18 

 Sept. 27 

 Oct. 15 



Oct. 20 



Oct. 25 



Oct. 23 



Dec. 5 

 Dec. 28 

 Florida, South of Lake Okeechobee, almost frost-free 



Colorado, West 

 Colorado, N.E. 

 Colorado, S.E. . 



Connecticut 



Delaware 



District of Columbia 



Florida, No 



Florida, Cen 



Jan. 25 

 Mar. 1 

 Jan. 15 

 Feb. 25 

 Apr. 25 



May 25 

 May 11 

 May 1 



Apr. 25 



Apr. 15 



Apr. 11 



Feb. 25 

 Feb. 11 



Georgia, No. 

 Georgia, So. 



Idaho 



Illinois, No. , 

 Illinois, So. . 



Indiana, No. 

 Indiana, So. 



Iowa, No 

 Iowa, So. 



Kansas 



Kentucky. . . . 



Louisiana, No. 

 Louisiana, So. 



Maine. 



Maryland 



Massachusetts. 



Michigan, Upper Pen 



Michigan, No 



Michigan, So 



Minnesota, No 



Minnesota, So 



Mississippi, No 



Mississippi, So 



Apr. 1 

 Mar. 15 



May 21 



May 1 



Apr. 15 



May 1 



Apr. 15 



May 1 

 Apr. 15 



Apr. 20 



Apr. 15 



Mar. 13 

 Feb. 20 



May 25 



Apr. 19 



Apr. 25 



May 25 

 May 17 

 May 10 



May 25 

 May 11 



Mar. 25 

 Mar. 15 



Nov. 1 

 Nov. 15 



Sept. 22 



Oct. 8 

 Oct 



Oct. 

 Oct. 



Oct 

 Oct. 



20 



20 



2 

 9 



Oct. 15 



Oct. 20 



Nov. 10 

 Nov. 20 



Sept. 25 



Oct. 20 



Oct. 25 



Sept. 15 

 Sept. 25 

 Oct. 8 



Sept. 15 

 Oct. 1 



Oct. 30 

 Nov. 15 



Missouri 



Montana 



Nebraska, W 



Nebraska, E 



Nevada, W 



Nevada, E 



New Hampshire . . 



New Jersey 



New Mexico, No. . 

 New Mexico, So. . 



New York, W 



New York, E 



New York, No. . . 



N. Carolina, W... 

 N. Carolina, E. . . 



N. Dakota, W. . . . 

 N. Dakota, E 



Ohio, No 



Ohio, So 



Oklahoma 



Oregon, W 



Oregon, E 



Pennsylvania, W. . 

 Pennsylvania, Cen. 

 Pennsylvania, E. . 



Rhode Island 



S. Carolina, N. W. 

 S. Carolina, S. E. . 



S. Dakota 



Tennessee 



Texas, N. W 



Texas, N. E 



Texas, So 



Utah 



Vermont 



Virginia, No 



Virginia, So 



Washington, W. . . 

 Washington, E. . . 



W. Virginia, W. . . 

 W. Virginia, E. . . . 



Wisconsin, No. . . . 

 Wisconsin, So. . . . 



Wyoming, W 



Wyoming, E 



LAST IN 

 SPRING 



FIRST IN 

 FALL 



Apr. 20 



Oct. 



20 



May 21 



Sept. 



22 



May 11 

 Apr. 15 



Oct. 

 Oct. 



4 



15 



May 19 

 June 1 



Sept. 

 Sept. 



22 

 14 



May 23 



Sept. 



25 



Apr. 20 



Oct. 



25 



Apr. 23 

 Apr. 1 



Oct. 

 Nov. 



17 

 1 



May 10 

 May 1 

 May 15 



Oct. 

 Oct. 

 Oct. 



8 



15 



1 



Apr. 15 

 Apr. 8 



Oct. 

 Nov. 



25 

 1 



May 21 

 May 16 



Sept. 

 Sept. 



13 

 20 



May 6 

 Apr. 20 



Oct. 

 Oct. 



15 

 20 



Apr. 2 



Nov. 



2 



Apr. 17 

 June 4 



Oct. 

 Sept. 



25 

 22 



Apr. 20 

 May 1 

 Apr. 17 



Oct. 

 Oct. 

 Oct. 



10 



15 

 15 



Apr. 25 



Oct. 



25 



Apr. 1 

 Mar. 15 



Nov. 



Nov. 



8 

 15 



May 15 



Sept. 



25 



Apr. 10 



Oct. 



25 



Apr. 15 

 Mar. 21 

 Feb. 10 



Nov. 

 Nov. 

 Dec. 



1 

 10 

 15 



Apr. 26 



Oct. 



19 



May 23 



Sept. 



25 



Apr. 15 

 Apr. 10 



Oct. 

 Oct. 



25 

 30 



Apr. 10 

 May 15 



Nov. 

 Oct. 



15 

 1 



May 1 

 May 15 



Oct. 

 Oct. 



15 

 1 



May 17 

 May 1 



Sept. 

 Oct. 



25 

 10 



June 20 

 May 21 



Aug. 

 Sept. 



20 

 20 



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



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