■ Dates given are normal averages for a light freeze; 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. Light freeze: 29° to 32°F—tender plants killed. Moderate freeze: 25° to 28°F—widely destructive effect on most vegetation. Severe freeze: 24°F and colder—heavy damage to most plants. –courtesy of National Climatic Data Center
State City
AK Juneau AL Mobile AR Pine Bluff AZ Phoenix AZ Tucson CA Eureka CA Sacramento CA San Francisco CO Denver CT Hartford DE Wilmington FL Miami FL Tallahassee GA Athens GA Savannah IA Atlantic IA Cedar Rapids ID Boise IL Chicago IL Springfield IN Indianapolis IN South Bend KS Topeka KY Lexington LA Monroe LA New Orleans MA Worcester MD Baltimore ME Portland MI Lansing MI Marquette MN Duluth MN Willmar MO Jefferson City MS Columbia MS Vicksburg MT Fort Peck MT Helena NC Fayetteville
Growing Last First Growing Last Season Spring Fall Season Spring (days) Frost Frost State City (days) Frost
148 May 8 Oct. 4 ND Bismarck 129 May 14 273 Feb. 28 Nov. 29 NE Blair 167 Apr. 25 240 Mar. 16 Nov. 12 NE North Platt 137 May 9 * NHConcord 124May20 324 Jan. 19 Dec. 18 NJ Newark 217 Apr. 3 323 Jan. 27 Dec. 16 NM Carlsbad 215 Mar. 31 296 Feb. 10 Dec. 4 NM Los Alamos 149 May 11 * NV Las Vegas 283 Feb. 16 157 Apr. 30 Oct. 4 NY Albany 153 May 2 166 Apr. 26 Oct. 9 NY Syracuse 168 Apr. 28 202 Apr. 10 Oct. 30 OH Akron 192 Apr. 18 * OHCincinnati 192Apr. 13 239 Mar. 22 Nov. 17 OK Lawton 223 Mar. 29 227 Mar. 24 Nov. 7 OK Tulsa 225 Mar. 27 268 Mar. 1 Nov. 25 OR Pendleton 187 Apr. 13 148 May 2 Sept. 28 OR Portland 236 Mar. 23 163 Apr. 25 Oct. 6 PA Franklin 164 May 6 147 May 10 Oct. 6 PA Williamsport 168 Apr. 30 187 Apr. 20 Oct. 24 RI Kingston 147 May 8 182 Apr. 13 Oct. 13 SC Charleston 260 Mar. 9 181 Apr. 17 Oct. 16 SC Columbia 214 Apr. 1 175 Apr. 26 Oct. 19 SD Rapid City 140 May 9 174 Apr. 19 Oct. 11 TN Memphis 235 Mar. 22 192 Apr. 15 Oct. 25 TN Nashville 204 Apr. 6 256 Mar. 3 Nov. 15 TX Amarillo 185 Apr. 18 300 Feb. 12 Dec. 11 TX Denton 243 Mar. 18 170 Apr. 26 Oct. 14 TX San Antonio 270 Feb. 28 200 Apr. 11 Oct. 29 UT Cedar City 133 May 21 156 May 2 Oct. 6 UT Spanish Fork 167 May 1 145 May 10 Oct. 3 VA Norfolk 247 Mar. 20 154 May 11 Oct. 13 VA Richmond 206 Apr. 6 124 May 21 Sept. 23 VT Burlington 147 May 8 154 Apr. 30 Oct. 1 WA Seattle 251 Mar. 10 188 Apr. 13 Oct. 18 WA Spokane 153 May 2 248 Mar. 13 Nov. 16 WI Green Bay 150 May 6 240 Mar. 20 Nov. 16 WI Sparta 133 May 13 141 May 8 Sept. 26 WV Parkersburg 183 Apr. 21 121 May 19 Sept. 18 WY Casper 120 May 22 222 Mar. 28 Nov. 5 *Frosts do not occur every year.
First Fall Frost
Sept. 21
Oct. 10
Sept. 24
Sept. 21
Nov. 7
Nov. 2
Oct. 8
Nov. 27
Oct. 3
Oct. 13
Oct. 28
Oct. 23
Nov. 7
Nov. 7
Oct. 18
Nov. 15
Oct. 17
Oct. 15
Oct. 3
Nov. 25
Nov. 1
Sept. 27
Nov. 13
Oct. 28
Oct. 20
Nov. 16
Nov. 25
Oct. 1
Oct. 16
Nov. 23
Oct. 30
Oct. 3
Nov. 17
Oct. 3
Oct. 4
Sept. 24
Oct. 22
References:
Archives