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 
Pulalbama, ING Wei: Mar. 25 @Oce 730 IMIISSOU Ia Sons ee Apr. 20 ct, 20 
Alabama, S. E.......... Mar. 8 Noy. 19 Miontanarcs «a ee a5 od May 21 Sept. 22 
Arizona, NOM ee aa. Apr. 23 Oct. 19 Nebraska We oe Manel Oc. a 
UNTAZONA, DO ee es Mar. 1 Dect Nebr bo ees One 15 
Arkansas, No........... Apr. 7 Oct 78 Nevada N\Vin 2 May 19 Sepe. 22 
NGKAMSAS (SOe Gass mene oo Mar. 25): Nov. 3 Noe june 2 Sen, i 
California New Hampshire. .5 5... May 23 Sept.25 
loperntal Valley... Jane -25 Dee: 15 N A 20 0 Ds 
inmeegion Valley 22 3: Mar. 1 Nov. 15 ey Oe Ce 
Southern Coast....... ames BS Dec. 15 New Mexico, No........ Apr. 23 Oct ii 
Gentral.Coasty. = 2. : Feb. 25 Decor New, Mexico; So. 3-7). Apr t Nov. 7: 
Mountain Sections.... AMore, 2S) Sept. 1 New York, W.......... May 10 Oct. 8 
Golorado, West oe. .ce .: May 25 Sept. 18 New Vouk, Bee May 1 ; Oc 15 
@olorado, Nib. May 11 Sept. 27 New Noi Noo... May 15 Oct. 1 
Colorado; Ssh 5 May 1 Oct:15 Ne Carolina We 2 Apr. 15 Oct: 25 
Connectictt... 93 4 Apr. 25 Oct. 20 N. Carolina, E......... Apr. 8 Nov. 1 
NE Dakota Wek. May 21 Sept. 13 
ke alee ee Apr. 15 Oct. 25 y 
Pclavare S : NeoWakota, Es ye: May 16 Sept. 20 
District of Columbia... . pie el Octs 23 Ola No 3 May. 6 Och te 
Blonida, (Nom a Feb. 25 Dec > OlniotSoye es a. Apr. 20 Oct. 20 
Hlonida:-Cenvwe eo. Hebs sit Dec 28 
. , Oklahoma. Apr, 2 Nov. 2 
Florida, South of Lake Okeechobee, almost frost-free ae a a 
Oregon, Woes can eee ee Pypre 7 Oct. 25 
ae a Sree rsd on a a Oregon Ey Pee June 4 Sept. 22 
Bee ee a a Pennsylvania, Wo... Apr. 20 Octe 10 
lao 0 See ee May 21 Septaa2 Pennsylvania, Cen....... May 1 Oct-15 
Hlinois No: May 1 Oc 8 Pennsylvania, ie 2 Apr. 17 Oct.c 15 
Winiois.SO ee ae ANoye, 115 Oct. 20 Rhode Island: 7.2. Apr. 25 Oct 25 
fradiainay INO oe May 1 Octi..S S, GarolinawNy Wess: Apis 4 Nov. 8 
InG@iana. SOM. 40 e ee Joye, 15 Oct. 20 S; Carolina 9. Den ne. Mar. 15 Nov. 15 
lowa Noises ee May 1 Oct. 2 Se Dakotas ae see May 15 Sept. 25 
lowa, SO)... Apr. 15 Oct. 9 APCDMESSCC ie et Apr. 10 Oct. 25 
Kansase ae Apr 20 Oct. 15 MexaswNe Wiese Apr. 15 Nov. 1 
Kentucky 9 Apr. 15 Oct. 20 Texas, N. E............ Mar. 21 Nov. 10 
ae 4 Mies ghexas) SOm Ree er Keb. 10 Deci 5 
oulsiana: NOR a s ates = Now. 
Louisiana, So phe sey eee Feb. 20 Nov. 20 Utah Ari CAC dite SOS Nee (ROE anEGe sats Apr. 26 Oct. 19 
Vie hs ee ete May 25 Sept. 25 ee ee eG Moy 2 ae 28 
Wareinia, NOM. esas: Apr. 15 Cts 25 
Maryland Bene gee ears SAYA Cs 5 sprees Apr. 19 Oct. 20 Virginia, So Ga eeee Apr. 10 Oct. 30 
Maccsachusetts.e. 30. 5. spin 20 Oct-25 Washington, W......... Apr. 10 Now 6 
Michigan, Upper Pen.... May 25 Sept. 15 Washineton. E24... May 15 Oct: ail 
Michigan, No.......... May 17 Sept. 25 WeVinginia, We. May 1 Oct. 15 
Diic Mga SO ee May 10 Oct. 8 WWE Winetnia ee May 15 Oct 1 
WEmimesovay NO .4: May 25 Sept. 15 Wisconsin, INO. ..08.... May 17 Sept. 25 
Miniiesota. «SO. oe May 11 Ota! VWasconsin, SO... : =... May 1 Oct. 10 
Mississippi NiO.) 3. 5 Mar. 25 Oct; 30 NW omminig, Nig ee Se June 20 Aug. 20 
WSSISSIPply; SO... Mar. 15 Nov. 15 Wyoming. dies. 2 a May 21 ‘Sept. 20 
*Allow 10 days either side of above dates to meet local conditions and seasonal differences. 
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