Average hard-irost dates* 
Based on United States Department of Agriculture Weather Records 
LAST IN FIRST IN LAST IN FIRST IN 
STATE SPRING FALL STATE SPRING FALL 
Alsbaimac Na W o2stices 3s Mar. 25 Oct. 30 Missourte cc hscu se uk eee Apr. 20 Oct. 20 
JN SETI ho sal Ope ere Mar. 8 Nov. 15 VIGNE chee May 21 Sy: 
ae - Bi ess uae aah mee a oe a Nebraskar VVisicir es ee ra May 11 Oct. 4 
OS nea EOE aka oe =o INebraskars tcc. einer: Noir, 1NS Octeels 
pees a Somaya ee a - ee = Nevada GWeaseu twee 2: May 19 Sept. 22 
USES Spe ORES ab Cages oak oy: Nea Glace itat eka cee oe June 1 Sept. 14 
California New Hampshire........ May 23 Sept. 25 
imperial: Valley ae cs. Jane i25 Decry 15 N : 
Interior Valley........ Mar. 1 Nov. 15 ew Jersey.........--. Apr. 20 Oct. 25 
Southern Coast....... {lena AS Dec. 15 New Mexico, No........ Apr. 23 Octaly 
Gantral Coast 245)... Feb. 25 Dec. 1 New, Mexico, (So. 3-2. 2. Apr ol Nov. 1 
Mountain Sections.... Apis 25 Sept, al New Vouk Woo 5-2. May 10 Oe 
Colorado; West 2.2) 22s May 25 Sept. 18 News Worle oot citi. May 1 Octrs 
Colorado Neb ts: May 11 Sept. 27 New York, Noes... 0. May 15 Octiw 
Colorado; Sun Ree May 1 Oct. 15 NUG@arolina We 72): Apr. 15 Oct 25 
Connecticut 2+. shies. Apr. 25 Oct. 20 N. Carolina, E......... Apr. 8 Nov. 1 
ING Dakota Wes. 22) May 21 Sept. 13 
Welaware = 4 lan aes Apia 15 Oc 25 : 
ies ae E Na Dakota nis iy (ties ce May 16 Sept. 20 
District of Columbia.... Apr. 11 Oct: -23 OherNo May 6 See ie 
Blond arINO wae. hiss ess Feb. 25 Dec. 5 Ohio Sons Soin... 2 ‘Apr. 20 Oct. 20 
lonidaC@eniwcs& Oras Feb. 11 Dec. 28 
, Oklahoma jini 5. Ge a Apr. 2 Nov. 2 
Florida, South of Lake Okeechobee, almost frost-free eens as on 
Oregon Wee is 5 sec Apr. 17 Oct-25 
Sia ee ee ee eo ao 4 ee . Oregon Ee ais ee ee June 4 Sept. 22 
ee ee ek me Pennsylvania, W...:.... Apr. 20 Oct. 10 
GRIND. ine b sop ases occ 3 May 21 Sept. 22 Pennsylvania, Cen....... May 1 Oct. 15 
Illinois, No........ ee May 1 Oce 8 Pennsylvania, E........ Apr. 17 Oct. 15 
IIRC SOs sep aes soo ps5 Apr. 15 Oct. 20 Rhodesian sys cee Apr. 25 Oca 25 
In@ianayNOr ss ake May 1 Oct 8) = 2S. Carolina “NeW. se. Apr. 1 Nov. 8 
Inchyamale SO je ea nk cee Apr. 15 Oct. 20 Si Carolina 1S Ea os. Mar. 15 Nov. 15 
MONGAPIN Os rack es wie uote se Miaiyer Oct, 2 Si Dakota cei hice ke May 15 Sept. 25 
NOW, SGsccoceapcouees Apr. 15 Oct, 2 AennieSSCCz es cnie sterowuae Apr. 10 Oct. 25 
WNaniSas sassy eS se Ses es Apr. 20 Oct. 15 Shexass, Ney Wits e sain Apr. 15 Nov. 1 
WeembuGkoy ste aiceas sais ers Apr. 15 Oct. 20 Texas, N. E............ Mar. 21 Nov. 10 
L 7 ai BPE KAS SOs ah sie seme eat Feb. 10 Dec. 15 
olisianasNOigs sas ce ar, 13 ov. 10 
ibovinans, Sh eae Feb. 20 Now 2002 ee ADE Ze Ore 
BR Sen it Sacer gaa May 23 Sept. 25 
iMicnine te eee = ee May 25 Sane 5 Mermont- ce Pp 
\Wieqtnre ip NOy ne G65 556 ae Jee 1S) Oct 25 
Wary lands cee rties tis 3 Apr. 19 Oct. 20 Vireinia; So. 9) .40 5 Apr. 10 Oct. 30 
Massachusetts.......... Aprie25 Oce 25 Washington, W......... Apr. 10 NiowatS 
Michigan, Upper Pen.... May 25 Sept. 15 Washington, E......... May 15 Oct 
Michigan, Now. ........ May 17 Sept. 25 We Wareimia, Wie... sae. May 1 Oct. 15 
Michigan; So. 2.08.0... ; May 10 Oct, 7s iV Rea oN asl Dae aa oreo May 15 Octet 
Minnesota: Nos. s.s 3. May 25 Sept. 15 WVisconsia INO.) ce ae acc May 17 Sept. 25 
Minnesota, SOns feos oe. May 11 Oct: +1 WISCONSIN OOMee rsisn ae: May 1 Oct. 10 
Mississippi, No......... Mar. 25 Oct. 30 Wyoming, W.¢....5 2... June 20 Aug. 20 
IMHSSISSIPpI SO. +e .s. ss Mar. 15 Nov. 15 Wry omminoe By scien, ake ee May 21 Sept. 20 
Deanne 
*Allow 10 days either side of above dates to meet local conditions and seasonal differences. 
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