Frost Chart for United States

Courtesy of National Climatic Center
Also see our Frost Chart for Canada.

Dates given are normal averages for a light freeze (32 degrees 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 freeze temperatures is usually based on their effect on plants, with the following commonly accepted categories: Light freeze: 29 degrees F to 32 degrees F -- tender plants killed, with little destructive effect on other vegetation. Moderate freeze: 25 degrees F to 28 degrees F -- widely destructive effect on most vegetation, with heavy damage to fruit blossoms and tender and semihardy plants. Severe freeze: 24 degrees F and colder -- damage to most plants.

For more locations click here.

City	State	Growing Season (Length in Days)	Last Frost Spring	First Frost Fall
Juneau	AK	148	May 8	Oct. 4
Mobile	AL	273	Feb. 28	Nov. 29
Pine Bluff	AR	240	Mar. 16	Nov. 12
Phoenix	AZ	*	*	*
Tucson	AZ	324	Jan 19	Dec. 18
Eureka	CA	323	Jan. 27	Dec. 16
Sacramento	CA	296	Feb. 10	Dec. 4
San Francisco	CA	*	*	*
Denver	CO	157	April 30	Oct. 4
Hartford	CT	166	Apr. 26	Oct. 9
Wilmington	DE	202	Apr. 10	Oct. 30
Miami	FL	*	*	*
Tallahassee	FL	239	Mar. 22	Nov. 17
Athens	GA	227	Mar. 24	Nov. 7
Savannah	GA	268	Mar. 1	Nov. 25
Atlantic	IA	148	May 2	Sept. 28
Cedar Rapids	IA	163	Apr. 25	Oct. 6
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
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
Worcester	MA	170	Apr. 26	Oct. 14
Baltimore	MD	200	Apr. 11	Oct. 29
Portland	ME	156	May 2	Oct. 6
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
Jefferson City	MO	188	Apr. 13	Oct. 18
Columbus	MS	248	Mar. 13	Nov. 16
Vicksburg	MS	240	Mar. 20	Nov. 16
Fort Peck	MT	141	May 8	Sept. 26
Helena	MT	121	May 19	Sept. 18
Fayetteville	NC	222	Mar. 28	Nov. 5
Bismarck	ND	129	May 14	Sept. 21
Blair	NE	167	Apr. 25	Oct. 10
North Platte	NE	137	May 9	Sept. 24
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
Las Vegas	NV	283	Feb. 16	Nov. 27
Albany	NY	153	May 2	Oct. 3
Syracuse	NY	168	Apr. 28	Oct. 13
Akron	OH	192	Apr. 18	Oct. 28
Cincinnati	OH	192	Apr. 13	Oct. 23
Lawton	OK	223	Mar. 29	Nov. 7
Tulsa	OK	218	Mar. 30	Nov. 4
Pendleton	OR	187	Apr. 13	Oct. 18
Portland	OR	236	Mar. 2 3	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
Norfolk	VA	247	Mar. 20	Nov. 23
Richmond	VA	206	Apr. 6	Oct. 30
Burlington	VT	147	May 8	Oct. 3
Seattle	WA	251	Mar. 10	Nov. 17
Spokane	WA	153	May 2	Oct. 3
Green Bay	WI	150	May 6	Oct. 4
Sparta	WI	133	May 13	Sept. 24
Parkersburg	WV	183	Apr. 21	Oct. 22
Casper	WY	120	May 22	Sept. 19