From NOAA 1991–2020 normals

Longest and Shortest Growing Seasons in Every State

For each state, the place with the longest and the shortest freeze-free season, and the gap between them.

The gap between a state's longest and shortest freeze-free season is widest in California (244 days), Nevada (242 days), Arizona (235 days) and narrowest in Delaware (31), North Dakota (37), South Dakota (44). Only stations with a yearly freeze are counted, so the warmest coastal places of the South, where frost is occasional, are left out.

Shortest and longest freeze-free season by state
State	Shortest	Days	Longest	Days	Stations
Alaska	Kasilof, AK	75	Ketchikan, AK	218	38
Alabama	Hamilton, AL	198	Mobile, AL	292	105
Arkansas	Garfield, AR	185	Stuttgart, AR	250	100
Arizona	Grand Canyon, AZ	97	Tucson, AZ	332	86
California	Portola, CA	91	Brawley, CA	335	178
Colorado	Nederland, CO	71	Palisade, CO	190	111
Connecticut	Torrington, CT	151	Clinton, CT	221	24
Delaware	Seaford, DE	200	Lewes, DE	231	8
Florida	Crestview, FL	237	Fort Walton Beach, FL	321	57
Georgia	Blairsville, GA	176	Brunswick, GA	314	119
Iowa	Sheldon, IA	145	Mediapolis, IA	202	129
Idaho	Montpelier, ID	77	Lewiston, ID	200	66
Illinois	Savanna, IL	154	Granite City, IL	214	145
Indiana	Fort Wayne, IN	159	Evansville, IN	225	117
Kansas	Colby, KS	156	Girard, KS	209	107
Kentucky	Shelbyville, KY	161	Eddyville, KY	225	97
Louisiana	Homer, LA	221	Gretna, LA	330	81
Massachusetts	Rutland, MA	141	Malden, MA	218	66
Maryland	Oakland, MD	156	Lusby, MD	248	36
Maine	Houlton, ME	115	Calais, ME	185	50
Michigan	Crystal Falls, MI	94	South Haven, MI	201	168
Minnesota	Hibbing, MN	93	La Crescent, MN	194	137
Missouri	Sullivan, MO	164	Caruthersville, MO	230	151
Mississippi	New Albany, MS	202	Ocean Springs, MS	301	94
Montana	Ennis, MT	78	Bigfork, MT	165	69
North Carolina	West Jefferson, NC	154	Atlantic Beach, NC	286	168
North Dakota	New Town, ND	121	Hillsboro, ND	158	34
Nebraska	Kimball, NE	132	Elkhorn, NE	187	67
New Hampshire	Colebrook, NH	112	Manchester, NH	180	46
New Jersey	Medford, NJ	169	Pleasantville, NJ	243	40
New Mexico	Ramah, NM	114	Chaparral, NM	264	68
Nevada	Ely, NV	91	Las Vegas, NV	333	37
New York	Lake Placid, NY	118	Corona, NY	244	162
Ohio	Orwell, OH	154	Cleveland Heights, OH	217	127
Oklahoma	Jay, OK	187	Hugo, OK	244	114
Oregon	Enterprise, OR	84	Toledo, OR	306	97
Pennsylvania	Kane, PA	126	Philadelphia, PA	232	161
Rhode Island	Exeter, RI	159	Newport, RI	216	9
South Carolina	Salem, SC	174	Charleston, SC	321	99
South Dakota	Whitewood, SD	125	Sioux Falls, SD	169	49
Tennessee	Roan Mountain, TN	165	Memphis, TN	244	137
Texas	Dalhart, TX	173	Houston, TX	327	315
Utah	Parowan, UT	82	St George, UT	239	67
Virginia	North Tazewell, VA	150	Norfolk, VA	255	119
Vermont	Plainfield, VT	119	Milton, VT	174	38
Washington	Cheney, WA	94	Eastsound, WA	276	110
Wisconsin	Ladysmith, WI	117	Milwaukee, WI	192	175
West Virginia	Marlinton, WV	148	Belle, WV	209	79
Wyoming	Jackson, WY	70	Thermopolis, WY	152	34

Computed by ArtUp Labs from NOAA NCEI U.S. Climate Normals for the stations behind this site's indexed ZIP pages, one row per station. Methodology · All guides