Hardiness zone 6b · 261 stations

Zone 6b Frost Dates: Typical Last Frost Apr 23

Summary across 261 NOAA weather stations whose location falls in zone 6b^*. Dates are the typical (50% chance) frost dates of each station; the table shows the spread between stations.

Typical last frostApril 23median station, 50% chance
Typical first fall frostOctober 20median station, 50% chance
Frost-free season178 daysmedian station
Weather stations261dates differ by weeks inside a zone

Typical (50%) frost dates across stations in zone 6b
	25% of stations	Median station	75% of stations
Last frost in spring (32°F)	April 17	April 23	May 3
First frost in fall (32°F)	October 13	October 20	October 24
Frost-free days	162	178	188

Frost dates inside one zone differ by weeks: the zone describes winter cold, not the length of the season. Use the station closest to you.

Stations in zone 6b

Weather stations with their typical (50% chance) frost dates
Station	Zone	Last spring frost (50%)	First fall frost (50%)	Frost-free days
Abilene, KS	6b	April 14	October 23	190
Albion, NY	6b	May 1	October 20	170
Alton, UT	6b	June 1	September 30	120
Altoona, PA	6b	April 25	October 21	176
Amistad, NM	6b	April 27	October 17	172
Appleton City, MO	6b	April 7	October 29	202
Ashland, KS	6b	April 21	October 17	178
Battle Mountain, NV	6b	May 9	September 29	141
Beckley, WV	6b	April 22	October 21	180
Beckley Va Hospital, WV	6b	May 6	October 10	156
Beloit, KS	6b	April 19	October 19	181
Benton Harbor, MI	6b	May 5	October 15	161
Billings, MO	6b	April 15	October 23	189
Blue Eagle Ranch - Currant 12 SSW, NV	6b	April 30	October 12	162
Blue Hill Coop, MA	6b	April 18	October 26	190
Bolivar, MO	6b	April 14	October 23	188
Bonners Ferry, ID	6b	April 30	October 4	154
Bowling Green, OH	6b	April 22	October 25	186
Brigham City, UT	6b	May 5	October 5	150
Buckeye, WV	6b	May 3	October 14	161
Buckhannon, WV	6b	April 29	October 20	173
Buffalo, NY	6b	April 24	October 26	183
Burkes Garden, VA	6b	May 9	October 6	150
Burley, ID	6b	May 7	October 4	150
Butler, MO	6b	April 12	October 23	192
Butler, PA	6b	May 7	October 14	159
Cabinet Gorge, ID	6b	May 9	October 8	153
California, MO	6b	April 11	October 25	195
Callao, UT	6b	May 14	September 28	135
Cambridge, OH	6b	April 28	October 17	172
Canandaigua, NY	6b	April 29	October 22	175
Carmi, IL	6b	April 15	October 19	183
Carrollton, MO	6b	April 16	October 23	187
Cassoday, KS	6b	April 18	October 22	186
Cheviot, OH	6b	April 17	October 26	191
Cimarron, KS	6b	April 20	October 20	182
Circleville, OH	6b	April 17	October 28	192
Clay Center, KS	6b	April 19	October 19	181
Cleveland, OH	6b	April 20	November 3	198
Clinton, MO	6b	April 17	October 21	187
Clintwood, VA	6b	April 29	October 16	169
Columbia, MO	6b	April 7	October 29	205
Columbus, IN	6b	April 11	October 25	195
Concordia, KS	6b	April 18	October 19	183
Cottonwood, ID	6b	May 6	October 13	156
Cottonwood Falls, KS	6b	April 19	October 18	180
Cynthiana, KY	6b	April 18	October 23	188
Davenport, WA	6b	June 6	September 11	94
Dayton MCD, OH	6b	April 18	October 25	189
Dearborn, MI	6b	May 1	October 15	166
Dennison, OH	6b	April 29	October 15	170
Detroit (Metro Airport), MI	6b	April 20	October 27	188
Dilia, NM	6b	May 2	October 13	162
Dodge City, KS	6b	April 21	October 20	179
Dyer, NV	6b	May 9	October 4	147
Effingham, IL	6b	April 13	October 24	191
Eldon, MO	6b	April 7	November 1	208
Elm, MO	6b	April 13	October 23	191
Elsberry, MO	6b	April 20	October 20	181
Emporia, KS	6b	April 15	October 23	190
Eureka, KS	6b	April 16	October 20	186
Eureka, NV	6b	June 2	September 29	119
Everett, PA	6b	April 27	October 17	170
Fairfield, OH	6b	April 19	October 22	186
Fairmont, WV	6b	April 18	October 28	192
Farmington, MO	6b	April 13	October 21	191
Ferron, UT	6b	May 6	October 10	156
Festus, MO	6b	April 9	October 26	197
Findlay, OH	6b	April 19	October 23	185
Findlay WPCC, OH	6b	April 22	October 24	183
Frankfort, MI	6b	May 2	October 26	175
Franklin, OH	6b	April 24	October 19	178
Franklin, PA	6b	May 2	October 23	171
Fredericktown, MO	6b	April 21	October 16	174
Freedom, MO	6b	April 11	October 21	191
Frostburg, MD	6b	April 29	October 18	171
Garden City (Airport), KS	6b	April 27	October 15	170
Garden Valley, ID	6b	June 1	September 10	102
Garnett, KS	6b	April 17	October 22	189
Gascon, NM	6b	May 28	September 26	119
Gassaway, WV	6b	April 20	October 25	185
Geneva, NY	6b	April 30	October 21	173
Glenville, WV	6b	April 25	October 24	180
Great Bend, KS	6b	April 24	October 15	172
Greensburg, IN	6b	April 15	October 26	194
Grenville, NM	6b	May 5	October 9	156
Groveland, MA	6b	May 3	October 8	158
Hannibal Locks & Dam, OH	6b	April 26	October 26	182
Harbor Beach, MI	6b	May 2	October 24	173
Hartford (Bradley Airport), CT	6b	April 21	October 16	177
Haverhill, MA	6b	May 1	October 12	163
Hays, KS	6b	April 25	October 15	171
Hazelton, ID	6b	May 7	October 5	149
Higginsville, MO	6b	April 10	October 24	195
Hillsboro, IL	6b	April 13	October 24	192
Hillsboro, OH	6b	April 24	October 20	178
Hudson, KS	6b	April 18	October 21	185
Hugoton, KS	6b	April 20	October 22	183
Hutchinson, KS	6b	April 20	October 19	181
Independence, MO	6b	April 10	October 27	198
Indiana, PA	6b	May 8	October 13	157
Iola, KS	6b	April 8	October 26	200
Jamaica Plain, MA	6b	April 19	October 23	185
Jefferson City, MO	6b	April 8	October 31	205
Jerseyville, IL	6b	April 14	October 19	187
Jetmore, KS	6b	April 25	October 18	175
Kanopolis Lake, KS	6b	April 19	October 23	184
Kansas City (Airport), MO	6b	April 13	October 24	193
Kellogg, ID	6b	May 14	September 26	131
Kim 10 SSE, CO	6b	April 24	October 18	175
Kingston, RI	6b	May 3	October 8	159
La Grande, OR	6b	May 6	October 1	146
Lacrosse, WA	6b	May 13	September 26	133
Lakin, KS	6b	April 18	October 23	187
Las Vegas, NM	6b	May 10	October 7	149
Lawrence, MA	6b	April 13	October 28	198
Lewisburg, WV	6b	May 3	October 9	158
Licking, MO	6b	April 20	October 19	181
Lima, OH	6b	April 24	October 24	182
Lipscomb, TX	6b	April 27	October 15	170
Lock Haven, PA	6b	April 30	October 20	173
Lodgepole, CA	6b	June 8	September 20	100
Lovelock, NV	6b	May 11	October 2	143
Lowell, MA	6b	April 30	October 10	164
Manistee, MI	6b	May 14	October 12	151
Marietta, OH	6b	April 18	October 27	191
Marysville, OH	6b	April 19	October 26	188
McKeesport, PA	6b	May 2	October 20	170
McNary, AZ	6b	May 20	October 11	142
Middlebourne, WV	6b	May 1	October 15	167
Middleton, MA	6b	May 3	October 9	157
Minden, NV	6b	May 30	September 26	119
Minneapolis, KS	6b	April 20	October 19	181
Moberly, MO	6b	April 13	October 25	195
Mosquero, NM	6b	May 3	October 12	160
Moundsville, WV	6b	April 26	October 21	177
Mount Vernon, IL	6b	April 11	October 22	193
Mountain Grove, MO	6b	April 11	October 28	196
Nashville, IL	6b	April 7	October 26	201
Nephi, UT	6b	May 6	October 10	156
New Castle, PA	6b	April 30	October 23	175
New Franklin, MO	6b	April 13	October 22	191
Newton, KS	6b	April 14	October 25	193
Nezperce, ID	6b	May 24	September 20	116
North Foster, RI	6b	April 25	October 19	176
Northport, WA	6b	May 8	October 1	143
Norwalk, OH	6b	April 25	October 25	183
Oakley, ID	6b	May 15	October 2	137
Odessa, WA	6b	May 14	September 26	135
Olney, IL	6b	April 15	October 23	189
Oswego, NY	6b	April 22	October 29	187
Ottawa, KS	6b	April 18	October 20	183
Paoli, IN	6b	April 21	October 18	178
Paonia, CO	6b	May 3	October 12	159
Pedernal, NM	6b	May 9	October 6	150
Perryville, MO	6b	April 19	October 20	182
Pittsburgh, PA	6b	April 23	October 23	181
Plain, WA	6b	May 22	September 22	121
Plainville, KS	6b	April 23	October 20	178
Pleasant Hill, MO	6b	April 8	October 29	204
Port Huron, MI	6b	April 19	November 3	196
Port Jervis, NY	6b	May 5	October 10	158
Portola, CA	6b	June 11	September 10	91
Pratt, KS	6b	April 20	October 20	183
Princeton, IN	6b	April 13	October 25	194
Pullman, WA	6b	May 6	September 29	143
Raton, NM	6b	May 5	October 9	156
Reading, MA	6b	April 25	October 17	174
Richlands, VA	6b	April 27	October 18	173
Ripley, WV	6b	April 23	October 21	178
Ritzville, WA	6b	May 7	October 10	153
Rochester, NY	6b	April 24	October 25	181
Rome, OR	6b	June 11	September 10	88
Rough River Lake, KY	6b	April 17	October 23	187
Russell, KS	6b	April 22	October 17	176
Saint Maries, ID	6b	May 3	October 4	152
Salem, IL	6b	April 9	October 26	197
Salem, MO	6b	April 17	October 18	182
Salina, PA	6b	April 29	October 20	171
Salina, UT	6b	May 29	September 26	118
Sandusky, OH	6b	April 10	November 5	209
Santa Fe, NM	6b	May 14	October 6	144
Saverton Lock and Dam 22, MO	6b	April 4	November 4	212
Sedalia, MO	6b	April 18	October 22	186
Selinsgrove, PA	6b	April 25	October 22	178
Shelbyville, IN	6b	April 17	October 22	187
Shoals, IN	6b	April 15	October 23	189
Shoshone, ID	6b	April 24	October 16	173
Smith, NV	6b	May 23	September 28	127
Smoky Valley - Carvers, NV	6b	May 24	September 28	126
Sodus, NY	6b	May 6	October 10	158
Spencer, WV	6b	April 30	October 17	169
Spokane, WA	6b	April 26	October 12	168
St. Charles, MO	6b	April 4	October 29	206
St. Louis (Spirit of St. Louis Airport), MO	6b	April 12	October 23	193
State College, PA	6b	April 20	October 26	187
Sterling, KS	6b	April 15	October 23	190
Steubenville, OH	6b	April 29	October 20	175
Storrs, CT	6b	April 19	October 22	186
Stratford, TX	6b	April 21	October 21	181
Topeka, KS	6b	April 12	October 23	191
Torreon Navajo Mission, NM	6b	May 15	October 5	143
Towanda, PA	6b	May 2	October 15	165
Ulysses, KS	6b	April 28	October 16	171
Uniontown, PA	6b	April 30	October 18	171
Vandalia, MO	6b	April 11	October 23	192
Vichy Rolla National Airport, MO	6b	April 12	October 25	194
Vincennes, IN	6b	April 11	October 26	197
Wakeeney, KS	6b	April 23	October 18	175
Walsh, CO	6b	April 30	October 14	166
Waverly, OH	6b	April 21	October 22	182
Waynesburg, PA	6b	May 3	October 15	164
Waynesville, MO	6b	April 15	October 21	185
West Union, WV	6b	April 28	October 21	176
Westerville, OH	6b	April 22	October 24	183
White Sulphur Springs, WV	6b	May 2	October 13	165
Wilbur, WA	6b	June 1	September 22	112
Wilkes-Barre, PA	6b	April 23	October 20	178
Williamsport, PA	6b	April 24	October 23	180
Wilson Lake, KS	6b	April 21	October 17	179
Windsor, IL	6b	April 16	October 22	187
Wise, VA	6b	April 25	October 18	175
Worcester, MA	6b	April 23	October 21	181
Xenia, OH	6b	April 18	October 24	188
Yates Center, KS	6b	April 10	October 28	198
Youngstown, OH	6b	May 1	October 17	167
Zanesville, OH	6b	April 26	October 19	177
near Akron, OH	6b	April 24	October 26	184
near Banner Elk, NC	6b	May 6	October 14	159
near Belleville, IL	6b	April 12	October 20	189
near Bloomington, IN	6b	April 15	October 26	192
near Burlington, KY	6b	April 18	October 25	188
near Carlyle, IL	6b	April 6	October 29	204
near Cincinnati, OH	6b	April 16	October 25	190
near Columbus, OH	6b	April 18	October 27	191
near Council Grove, KS	6b	April 11	October 25	194
near Detroit, MI	6b	April 21	October 31	190
near Fairfield, IL	6b	April 7	October 26	201
near Ford City, PA	6b	May 4	October 16	164
near French Lick, IN	6b	April 25	October 15	172
near La Pine, OR	6b	June 7	September 18	100
near Lawrence, KS	6b	April 15	October 22	189
near Marion, KS	6b	April 8	October 30	202
near Martinsburg, PA	6b	April 23	October 21	177
near Morehead, KY	6b	April 17	October 25	189
near New Paltz, NY	6b	April 21	October 27	188
near Norton Shores, MI	6b	April 30	October 19	170
near Norwich, CT	6b	April 14	October 24	192
near Oolitic, IN	6b	April 20	October 20	181
near Pocatello, ID	6b	May 16	October 2	137
near Redmond, OR	6b	June 9	September 14	98
near Rolla, MO	6b	April 5	November 1	207
near Santaquin, UT	6b	May 4	October 11	157
near Sutton, WV	6b	April 22	October 28	187
near Thompson Falls, MT	6b	May 7	October 4	150
near Toledo, OH	6b	April 22	October 24	188
near Westernport, MD	6b	April 29	October 20	174
near Williamstown, WV	6b	April 23	October 22	180

Sources

* zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.