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Frost Chart for United States

Find average frost dates for your last spring frost and first fall frost.

If you're a farmer or gardener, get planting dates by zip code, based on your average last spring frost date here.

Dates given are normal averages for a light freeze or frost (32°F); local weather and topography may cause considerable variations. The possibility of frost occurring after the spring dates and before the fall dates is 50 percent. The classification of freezing temperatures is usually based on their effect on plants, with the following commonly accepted categories:

Light freeze:

29°F to 32°F—tender plants killed, with little destructive effect on other vegetation.

Moderate freeze:

25°F to 28°F—widely destructive effect on most vegetation, with heavy damage to fruit blossoms and tender and semi-hardy plants.

Severe freeze:

24°F and colder—damage to most plants.

Frost Chart

Below are U.S. cities. Or, seeCanadian cities.

City	State	Growing Season (Days)	Last Frost Spring	First Frost Fall
Mobile	AL	273	Feb. 28	Nov. 29
Juneau	AK	148	May 8	Oct. 4
Phoenix	AZ	*	*	*
Tucson	AZ	324	Jan. 19	Dec. 18
Pine Bluff	AR	240	Mar. 16	Nov. 12
Eureka	CA	323	Jan. 27	Dec. 16
Sacramento	CA	296	Feb. 10	Dec. 4
San Francisco	CA	*	*	*
Denver	CO	157	Apr. 30	Oct. 4
Hartford	CT	166	Apr. 26	Oct. 9
Wilmington	DE	202	Apr. 10	Oct. 30
Miami	FL	*	*	*
Tampa	FL	338	Jan. 28	Jan. 3
Athens	GA	227	Mar. 24	Nov. 7
Savannah	GA	268	Mar. 1	Nov. 25
Boise	ID	147	May 10	Oct. 6
Chicago	IL	187	Apr. 20	Oct. 24
Springfield	IL	182	Apr. 13	Oct. 13
Indianapolis	IN	181	Apr. 17	Oct. 16
South Bend	IN	175	Apr. 26	Oct. 19
Atlantic	IA	148	May 2	Sept. 28
Cedar Rapids	IA	163	Apr. 25	Oct. 6
Topeka	KS	174	Apr. 19	Oct. 11
Lexington	KY	192	Apr. 15	Oct. 25
Monroe	LA	256	Mar. 3	Nov. 15
New Orleans	LA	300	Feb. 12	Dec. 11
Portland	ME	156	May 2	Oct. 6
Baltimore	MD	200	Apr. 11	Oct. 29
Worcester	MA	170	Apr. 26	Oct. 14
Lansing	MI	145	May 10	Oct. 3
Marquette	MI	154	May 11	Oct. 13
Duluth	MN	124	May 21	Sept. 23
Willmar	MN	154	Apr. 30	Oct. 1
Columbus	MS	248	Mar. 13	Nov. 16
Vicksburg	MS	240	Mar. 20	Nov. 16
Jefferson City	MO	188	Apr. 13	Oct. 18
Fort Peck	MT	141	May 8	Sept. 26
Helena	MT	121	May 19	Sept. 18
Blair	NE	167	Apr. 25	Oct. 10
North Platte	NE	137	May 9	Sept. 24
Las Vegas	NV	283	Feb. 16	Nov. 27
Concord	NH	124	May 20	Sept. 21
Newark	NJ	217	Apr. 3	Nov. 7
Carlsbad	NM	215	Mar. 31	Nov. 2
Los Alamos	NM	149	May 11	Oct. 8
Albany	NY	153	May 2	Oct. 3
Syracuse	NY	168	Apr. 28	Oct. 13
Fayetteville	NC	222	Mar. 28	Nov. 5
Bismarck	ND	129	May 14	Sept. 21
Akron	OH	192	Apr. 18	Oct. 28
Cincinnati	OH	192	Apr. 13	Oct. 23
Lawton	OK	223	Mar. 29	Nov. 7
Tulsa	OK	225	Mar. 27	Nov. 7
Pendleton	OR	187	Apr. 13	Oct. 18
Portland	OR	236	Mar. 23	Nov. 15
Franklin	PA	164	May 6	Oct. 17
Williamsport	PA	168	Apr. 30	Oct. 15
Kingston	RI	147	May 8	Oct. 3
Charleston	SC	260	Mar. 9	Nov. 25
Columbia	SC	214	Apr. 1	Nov. 1
Rapid City	SD	140	May 9	Sept. 27
Memphis	TN	235	Mar. 22	Nov. 13
Nashville	TN	204	Apr. 6	Oct. 28
Amarillo	TX	185	Apr. 18	Oct. 20
Denton	TX	243	Mar. 18	Nov. 16
San Antonio	TX	270	Feb. 28	Nov. 25
Cedar City	UT	133	May 21	Oct. 1
Spanish Fork	UT	167	May 1	Oct. 16
Burlington	VT	147	May 8	Oct. 3
Norfolk	VA	247	Mar. 20	Nov. 23
Richmond	VA	206	Apr. 6	Oct. 30
Seattle	WA	251	Mar. 10	Nov. 17
Spokane	WA	153	May 2	Oct. 3
Parkersburg	WV	183	Apr. 21	Oct. 22
Green Bay	WI	150	May 6	Oct. 4
Janesville	WI	164	Apr. 28	Oct. 10
Casper	WY	120	May 22	Sept. 19