Frost dates by state
Pick a state to see frost dates, hardiness zones, soil temperature and the 7-day freeze forecast for every county and ZIP code, from NOAA 1991–2020 climate normals. 33,642 ZIP codes in 51 states and DC.
| State | Counties | ZIP codes |
|---|---|---|
| Alabama | 67 | 656 |
| Alaska | 30 | 245 |
| Arizona | 15 | 417 |
| Arkansas | 75 | 614 |
| California | 58 | 1,803 |
| Colorado | 64 | 528 |
| Connecticut | 8 | 288 |
| Delaware | 3 | 68 |
| District of Columbia | 1 | 57 |
| Florida | 67 | 1,013 |
| Georgia | 159 | 751 |
| Hawaii | 5 | 97 |
| Idaho | 44 | 280 |
| Illinois | 102 | 1,396 |
| Indiana | 92 | 807 |
| Iowa | 99 | 970 |
| Kansas | 105 | 704 |
| Kentucky | 120 | 779 |
| Louisiana | 64 | 539 |
| Maine | 16 | 427 |
| Maryland | 24 | 477 |
| Massachusetts | 14 | 539 |
| Michigan | 83 | 992 |
| Minnesota | 87 | 880 |
| Mississippi | 82 | 427 |
| Missouri | 115 | 1,035 |
| Montana | 56 | 369 |
| Nebraska | 93 | 586 |
| Nevada | 17 | 180 |
| New Hampshire | 10 | 246 |
| New Jersey | 21 | 598 |
| New Mexico | 33 | 372 |
| New York | 62 | 1,826 |
| North Carolina | 100 | 853 |
| North Dakota | 53 | 389 |
| Ohio | 88 | 1,233 |
| Oklahoma | 77 | 664 |
| Oregon | 36 | 428 |
| Pennsylvania | 67 | 1,833 |
| Rhode Island | 5 | 81 |
| South Carolina | 46 | 424 |
| South Dakota | 66 | 375 |
| Tennessee | 95 | 638 |
| Texas | 254 | 1,989 |
| Utah | 29 | 299 |
| Vermont | 14 | 265 |
| Virginia | 115 | 903 |
| Washington | 39 | 605 |
| West Virginia | 55 | 738 |
| Wisconsin | 72 | 783 |
| Wyoming | 23 | 176 |
University and garden plant programs by state
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