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 |
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 |
| * Frosts do not occur every year. |
This was taken from http://www.almanac.com/content/frost-chart-united-states