U.S. Frost Chart 
provided by Master Garden Products
 

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.

City, State Growing Season
(Length in Days)		 Last Frost
Spring		 First Frost
Fall
Mobile, AL 272 Feb. 27 Nov. 26
Juneau, AK 133 May 16 Sept. 26
Phoenix, AZ 308 Feb. 5 Dec. 15
Tucson, AZ 273 Feb. 28 Nov. 29
Pine Bluff, AR 234 Mar. 19 Nov. 8
Eureka, CA 324 Jan. 30 Dec. 15
Sacramento, CA 289 Feb. 14 Dec. 1
San Francisco, CA * * *
Denver, CO 157 May 3 Oct. 8
Hartford, CT 167 Apr. 25 Oct. 10
Wilmington, DE 198 Apr. 13 Oct. 29
Miami, FL * * *
Tampa, FL 338 Jan. 28 Jan. 3
Athens, GA 224 Mar. 28 Nov. 8
Savannah, GA 250 Mar. 10 Nov. 15
Boise, ID 153 May 8 Oct. 9
Chicago, IL 187 Apr. 22 Oct. 26
Springfield, IL 185 Apr. 17 Oct. 19
Indianapolis, IN 180 Apr. 22 Oct. 20
South Bend, IN 169 May 1 Oct. 18
Atlantic, IA 141 May 9 Sept. 28
Cedar Rapids, IA 161 Apr. 29 Oct. 7
Topeka, KS 175 Apr. 21 Oct. 14
Lexington, KY 190 Apr. 17 Oct. 25
Monroe, LA 242 Mar. 9 Nov. 7
New Orleans, LA 288 Feb. 20 Dec. 5
Portland, ME 143 May 10 Sept. 30
Baltimore, MD 231 Mar. 26 Nov. 13
Worcester, MA 172 Apr. 27 Oct. 17
Lansing, MI 140 May 13 Sept. 30
Marquette, MI 159 May 12 Oct. 19
Duluth, MN 122 May 21 Sept. 21
Willmar, MN 152 May 4 Oct. 4
Columbus, MS 215 Mar. 27 Oct. 29
Vicksburg, MS 250 Mar. 13 Nov. 18
Jefferson City, MO 173 Apr. 26 Oct. 16
Fort Peck, MT 146 May 5 Sept. 28
Helena, MT 122 May 18 Sept. 18
Blair, NE 165 Apr. 27 Oct. 10
North Platte, NE 136 May 11 Sept. 24
Las Vegas, NV 259 Mar. 7 Nov. 21
Concord, NH 121 May 23 Sept. 22
Newark, NJ 219 Apr. 4 Nov. 10
Carlsbad, NM 223 Mar. 29 Nov. 7
Los Alamos, NM 157 May 8 Oct. 13
Albany, NY 144 May 7 Sept. 29
Syracuse, NY 170 Apr. 28 Oct. 16
Fayetteville, NC 212 Apr. 2 Oct. 31
Bismarck, ND 129 May 14 Sept. 20
Akron, OH 168 May 3 Oct. 18
Cincinnati, OH 195 Apr. 14 Oct. 27
Lawton, OK 217 Apr. 1 Nov. 5
Tulsa, OK 218 Mar. 30 Nov. 4
Pendleton, OR 188 Apr. 15 Oct. 21
Portland, OR 217 Apr. 3 Nov. 7
Carlisle, PA 182 Apr. 20 Oct. 20
Williamsport, PA 168 Apr. 29 Oct. 15
Kingston, RI 144 May 8 Sept. 30
Charleston, SC 253 Mar. 11 Nov. 20
Columbia, SC 211 Apr. 4 Nov. 2
Rapid City, SD 145 May 7 Sept. 29
Memphis, TN 228 Mar. 23 Nov. 7
Nashville, TN 207 Apr. 5 Oct. 29
Amarillo, TX 197 Apr. 14 Oct. 29
Denton, TX 231 Mar. 25 Nov. 12
San Antonio, TX 265 Mar. 3 Nov. 24
Cedar City, UT 134 May 20 Oct. 2
Spanish Fork, UT 156 May 8 Oct. 12
Burlington, VT 142 May 11 Oct. 1
Norfolk, VA 239 Mar. 23 Nov. 17
Richmond, VA 198 Apr. 10 Oct. 26
Seattle, WA 232 Mar. 24 Nov. 11
Spokane, WA 153 May 4 Oct. 5
Parkersburg, WV 175 Apr. 25 Oct. 18
Green Bay, WI 143 May 12 Oct. 2
Janesville, WI 164 Apr. 28 Oct. 10
Casper, WY 123 May 22 Sept. 22
*Frosts do not occur every year.

 


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Last modified: August 28, 2014