Ohio frost dates
Across 130 NOAA climate stations in Ohio, the median last spring frost (32°F) ranges from Apr 8 at Cleveland Burke AP to May 10 at Dorset; the typical station sees its last frost around Apr 24 and its first fall frost around Oct 22.
“Median” dates have a 50% chance of a later spring frost or an earlier fall frost. “10% risk” dates are the safer choice for tender plants: only 1 year in 10 has frost beyond them. Source: NOAA NCEI 1991–2020 Climate Normals. Elevation matters: within a state, frost dates can differ by a month or more between valleys and hills.
| Station | Elevation | Last frost (median) | Last frost (10% risk) | First frost (median) | First frost (10% risk) | Growing season |
|---|---|---|---|---|---|---|
| Akron Canton Rgnl AP | 1,208 ft | Apr 24 | May 11 | Oct 26 | Oct 11 | 184 days |
| Akron Fulton Intl AP | 1,044 ft | Apr 24 | May 9 | Oct 28 | Oct 12 | 186 days |
| Ashland 2 Sw | 1,265 ft | Apr 30 | May 15 | Oct 15 | Oct 1 | 168 days |
| Ashtabula Co AP | 924 ft | May 2 | May 20 | Oct 21 | Oct 4 | 171 days |
| Athens Ou | 684 ft | Apr 25 | May 12 | Oct 23 | Oct 8 | 179 days |
| Barnesville | 1,280 ft | Apr 27 | May 13 | Oct 22 | Oct 7 | 177 days |
| Bellefontaine | 1,176 ft | Apr 26 | May 12 | Oct 20 | Oct 7 | 175 days |
| Beverly Stp | 624 ft | Apr 24 | May 11 | Oct 22 | Oct 9 | 178 days |
| Bowling Green Wwtp | 675 ft | Apr 22 | May 7 | Oct 25 | Oct 12 | 186 days |
| Bryan 2 Se | 730 ft | Apr 26 | May 11 | Oct 17 | Oct 3 | 170 days |
| Bucyrus | 955 ft | Apr 19 | May 6 | Oct 27 | Oct 14 | 190 days |
| Cadiz | 1,260 ft | Apr 21 | May 5 | Oct 25 | Oct 10 | 186 days |
| Caldwell 3SE | 880 ft | Apr 30 | May 20 | Oct 14 | Sep 30 | 167 days |
| Cambridge | 800 ft | Apr 28 | May 15 | Oct 17 | Oct 3 | 172 days |
| Carpenter 2 S | 822 ft | Apr 27 | May 15 | Oct 14 | Oct 2 | 168 days |
| Celina 3 Ne | 866 ft | Apr 27 | May 10 | Oct 19 | Oct 3 | 175 days |
| Centerburg 2 Se | 1,205 ft | Apr 27 | May 13 | Oct 17 | Oct 5 | 172 days |
| Chardon | 1,130 ft | May 5 | May 21 | Oct 18 | Oct 2 | 164 days |
| Cheviot | 891 ft | Apr 17 | May 5 | Oct 26 | Oct 11 | 191 days |
| Cheviot 3 W | 853 ft | Apr 16 | May 3 | Oct 28 | Oct 14 | 193 days |
| Chillicothe Mound City | 650 ft | Apr 20 | May 7 | Oct 22 | Oct 7 | 184 days |
| Chilo Meldahl Locks & Dam | 480 ft | Apr 16 | May 4 | Oct 31 | Oct 17 | 196 days |
| Chippewa Lake | 1,180 ft | Apr 29 | May 15 | Oct 19 | Oct 5 | 172 days |
| Cincinnati | 1,056 ft | Apr 19 | May 6 | Oct 22 | Oct 8 | 185 days |
| Cincinnati Lunken AP | 490 ft | Apr 16 | May 3 | Oct 25 | Oct 12 | 190 days |
| Cincinnati-Fernbank | 500 ft | Apr 13 | May 2 | Oct 31 | Oct 17 | 197 days |
| Circleville | 675 ft | Apr 17 | May 4 | Oct 28 | Oct 14 | 192 days |
| Cleveland | 763 ft | Apr 20 | May 5 | Nov 3 | Oct 21 | 198 days |
| Cleveland Burke AP | 584 ft | Apr 8 | Apr 20 | Nov 12 | Nov 1 | 217 days |
| Columbus Ohio State Univ AP | 905 ft | Apr 22 | May 9 | Oct 23 | Oct 9 | 183 days |
| Columbus Port Columbus Intl AP | 810 ft | Apr 18 | May 5 | Oct 27 | Oct 14 | 191 days |
| Columbus Wcmh | 740 ft | Apr 20 | May 7 | Oct 24 | Oct 13 | 185 days |
| Columbus-Valley Crossing | 760 ft | Apr 23 | May 8 | Oct 19 | Oct 6 | 177 days |
| Coshocton Ag Rsch Stn | 1,140 ft | Apr 18 | May 5 | Oct 28 | Oct 11 | 190 days |
| Coshocton Wpc Plt | 760 ft | Apr 27 | May 16 | Oct 18 | Oct 6 | 174 days |
| Danville 2 W | 970 ft | May 2 | May 19 | Oct 8 | Sep 24 | 157 days |
| Dayton Intl AP | 1,000 ft | Apr 16 | May 3 | Oct 28 | Oct 16 | 194 days |
| Dayton Mcd | 720 ft | Apr 18 | May 5 | Oct 25 | Oct 13 | 189 days |
| Dayton Wright Bros AP | 962 ft | Apr 17 | May 6 | Oct 26 | Oct 13 | 192 days |
| Defiance | 700 ft | Apr 22 | May 8 | Oct 24 | Oct 11 | 183 days |
| Defiance Mem AP | 708 ft | Apr 28 | May 14 | Oct 17 | Oct 1 | 170 days |
| Dennison Wtr Wks | 860 ft | Apr 29 | May 17 | Oct 15 | Oct 2 | 170 days |
| Dorset | 980 ft | May 10 | May 27 | Oct 10 | Sep 26 | 154 days |
| Eaton | 1,002 ft | Apr 25 | May 10 | Oct 20 | Oct 6 | 176 days |
| Elyria 3 E | 730 ft | Apr 22 | May 7 | Nov 1 | Oct 17 | 192 days |
| Elyria Lorain Co AP | 794 ft | Apr 24 | May 10 | Oct 24 | Oct 8 | 182 days |
| Fairfield | 575 ft | Apr 19 | May 7 | Oct 22 | Oct 9 | 186 days |
| Findlay AP | 800 ft | Apr 19 | May 6 | Oct 23 | Oct 9 | 185 days |
| Findlay Wpcc | 768 ft | Apr 22 | May 6 | Oct 24 | Oct 10 | 183 days |
| Franklin | 679 ft | Apr 24 | May 11 | Oct 19 | Oct 7 | 178 days |
| Fredericktown 4 S | 1,050 ft | May 1 | May 18 | Oct 10 | Sep 27 | 161 days |
| Fremont | 600 ft | Apr 26 | May 13 | Oct 23 | Oct 8 | 179 days |
| Fremont Ag Stn | 664 ft | Apr 21 | May 6 | Oct 24 | Oct 8 | 183 days |
| Galion Wtr Wks | 1,170 ft | Apr 26 | May 11 | Oct 20 | Oct 7 | 176 days |
| Gallipolis | 578 ft | Apr 18 | May 4 | Oct 28 | Oct 15 | 192 days |
| Greenville Wtp | 1,030 ft | Apr 21 | May 7 | Oct 20 | Oct 6 | 180 days |
| Hamilton Butler Co Rgnl AP | 634 ft | Apr 22 | May 10 | Oct 18 | Oct 5 | 178 days |
| Hannibal Locks & Dam | 620 ft | Apr 26 | May 13 | Oct 26 | Oct 12 | 182 days |
| Hicksville | 750 ft | Apr 28 | May 13 | Oct 17 | Sep 29 | 170 days |
| Hillsboro | 953 ft | Apr 24 | May 11 | Oct 20 | Oct 6 | 178 days |
| Hiram | 1,230 ft | May 1 | May 18 | Oct 20 | Oct 5 | 170 days |
| Hoytville 2 Ne | 700 ft | Apr 24 | May 10 | Oct 21 | Oct 4 | 179 days |
| Huntsville 3N | 1,034 ft | Apr 22 | May 6 | Oct 27 | Oct 14 | 188 days |
| Jackson 3 Nw | 845 ft | Apr 22 | May 11 | Oct 21 | Oct 9 | 181 days |
| Kenton | 997 ft | Apr 22 | May 7 | Oct 24 | Oct 9 | 182 days |
| Kirtland-Holden 2 | 1,030 ft | Apr 26 | May 14 | Oct 31 | Oct 15 | 184 days |
| Lancaster | 827 ft | Apr 22 | May 9 | Oct 24 | Oct 8 | 183 days |
| Lancaster Fairfield AP | 869 ft | Apr 26 | May 12 | Oct 13 | Oct 1 | 169 days |
| Lima Allen Co AP | 975 ft | Apr 22 | May 7 | Oct 22 | Oct 7 | 181 days |
| Lima Wwtp | 850 ft | Apr 24 | May 11 | Oct 24 | Oct 10 | 182 days |
| Logan | 722 ft | Apr 30 | May 17 | Oct 14 | Oct 2 | 167 days |
| London Fish Hatchery | 1,120 ft | Apr 24 | May 10 | Oct 18 | Oct 5 | 175 days |
| Lucasville | 568 ft | Apr 21 | May 9 | Oct 24 | Oct 11 | 185 days |
| Mansfield 5 W | 1,350 ft | Apr 30 | May 17 | Oct 15 | Oct 1 | 167 days |
| Mansfield Lahm Muni AP | 1,295 ft | Apr 26 | May 12 | Oct 22 | Oct 6 | 177 days |
| Marietta Wwtp | 610 ft | Apr 18 | May 4 | Oct 27 | Oct 13 | 191 days |
| Marion 2 N | 965 ft | Apr 25 | May 11 | Oct 20 | Oct 5 | 178 days |
| Marion Muni AP | 994 ft | Apr 24 | May 10 | Oct 20 | Oct 5 | 178 days |
| Marysville | 970 ft | Apr 19 | May 5 | Oct 26 | Oct 13 | 188 days |
| Mc Connellsville Lk 7 | 760 ft | Apr 27 | May 14 | Oct 21 | Oct 8 | 176 days |
| Milford | 520 ft | Apr 23 | May 8 | Oct 18 | Oct 6 | 177 days |
| Millersburg | 819 ft | May 2 | May 21 | Oct 14 | Oct 1 | 164 days |
| Millport 4 Ne | 1,170 ft | May 2 | May 20 | Oct 13 | Oct 1 | 165 days |
| Montpelier | 860 ft | Apr 28 | May 12 | Oct 18 | Oct 4 | 173 days |
| Mosquito Creek Lake | 910 ft | Apr 30 | May 16 | Oct 23 | Oct 7 | 176 days |
| Napoleon | 682 ft | Apr 24 | May 7 | Oct 21 | Oct 5 | 179 days |
| Napoleon 1SW | 670 ft | Apr 23 | May 9 | Oct 24 | Oct 10 | 183 days |
| New Carlisle | 874 ft | Apr 24 | May 10 | Oct 17 | Oct 4 | 173 days |
| New Lexington 2 Nw | 877 ft | Apr 30 | May 16 | Oct 17 | Oct 4 | 168 days |
| New Philadelphia | 925 ft | Apr 30 | May 17 | Oct 15 | Oct 2 | 167 days |
| New Philadelphia Fld | 895 ft | Apr 26 | May 15 | Oct 21 | Oct 5 | 176 days |
| Newark Heath AP | 884 ft | Apr 22 | May 10 | Oct 18 | Oct 5 | 178 days |
| Newark Wtr Wks | 835 ft | Apr 29 | May 17 | Oct 16 | Oct 1 | 167 days |
| Newport | 676 ft | Apr 23 | May 10 | Oct 26 | Oct 12 | 185 days |
| Norwalk Wwtp | 670 ft | Apr 25 | May 9 | Oct 25 | Oct 11 | 183 days |
| Oberlin | 816 ft | Apr 27 | May 14 | Oct 22 | Oct 7 | 178 days |
| Painesville 4 Nw | 600 ft | Apr 15 | Apr 27 | Nov 9 | Oct 30 | 209 days |
| Pandora | 770 ft | Apr 23 | May 9 | Oct 22 | Oct 6 | 180 days |
| Paulding | 725 ft | Apr 25 | May 10 | Oct 19 | Oct 3 | 175 days |
| Philo 3 Sw | 1,020 ft | Apr 19 | May 9 | Oct 25 | Oct 9 | 189 days |
| Piqua Wwtp | 853 ft | Apr 18 | May 5 | Oct 23 | Oct 9 | 186 days |
| Portsmouth-Sciotoville | 540 ft | Apr 17 | May 5 | Oct 25 | Oct 11 | 191 days |
| Ravenna 2 S | 1,107 ft | Apr 21 | May 7 | Oct 29 | Oct 14 | 189 days |
| Ripley Exp Farm | 880 ft | Apr 29 | May 16 | Oct 11 | Sep 28 | 162 days |
| S Pt | 553 ft | Apr 16 | May 4 | Oct 30 | Oct 18 | 196 days |
| Sandusky | 584 ft | Apr 10 | Apr 23 | Nov 5 | Oct 23 | 209 days |
| Sidney 1 S | 940 ft | Apr 27 | May 12 | Oct 20 | Oct 5 | 175 days |
| Springfield Wtp | 951 ft | Apr 25 | May 12 | Oct 19 | Oct 4 | 175 days |
| Steubenville | 992 ft | Apr 29 | May 15 | Oct 20 | Oct 6 | 175 days |
| Stow 4 Se | 1,060 ft | Apr 30 | May 16 | Oct 21 | Oct 7 | 173 days |
| Tiffin | 740 ft | Apr 23 | May 7 | Oct 23 | Oct 9 | 184 days |
| Toledo Express AP | 669 ft | Apr 22 | May 7 | Oct 24 | Oct 11 | 188 days |
| Toledo Metcalf Fld | 622 ft | Apr 20 | May 7 | Oct 27 | Oct 14 | 188 days |
| Upper Sandusky | 854 ft | Apr 29 | May 14 | Oct 17 | Oct 2 | 171 days |
| Urbana Wwtp | 1,019 ft | Apr 24 | May 10 | Oct 19 | Oct 7 | 179 days |
| Van Wert 1 S | 790 ft | Apr 21 | May 6 | Oct 26 | Oct 13 | 187 days |
| Warren 3 S | 900 ft | May 8 | May 25 | Oct 12 | Sep 30 | 157 days |
| Washington Court House | 957 ft | Apr 23 | May 8 | Oct 21 | Oct 8 | 181 days |
| Waterloo | 625 ft | Apr 30 | May 16 | Oct 15 | Oct 3 | 167 days |
| Wauseon Wtp | 750 ft | Apr 29 | May 16 | Oct 16 | Sep 30 | 170 days |
| Waverly | 572 ft | Apr 21 | May 9 | Oct 22 | Oct 6 | 182 days |
| Westerville | 802 ft | Apr 22 | May 10 | Oct 24 | Oct 10 | 183 days |
| Wfo Wilmington | 1,053 ft | Apr 17 | May 4 | Oct 22 | Oct 9 | 187 days |
| Wilmington 3 N | 1,033 ft | Apr 20 | May 6 | Oct 20 | Oct 5 | 180 days |
| Wooster 3 Sse | 1,102 ft | Apr 24 | May 12 | Oct 21 | Oct 6 | 177 days |
| Wooster Exp Station | 1,020 ft | Apr 30 | May 18 | Oct 12 | Sep 29 | 163 days |
| Wooster Wayne Co AP | 1,137 ft | Apr 29 | May 15 | Oct 14 | Sep 29 | 167 days |
| Xenia 6 Sse | 997 ft | Apr 18 | May 4 | Oct 24 | Oct 11 | 188 days |
| Youngstown Rgnl AP | 1,180 ft | May 1 | May 20 | Oct 17 | Oct 1 | 167 days |
| Zanesville Muni AP | 880 ft | Apr 26 | May 14 | Oct 19 | Oct 6 | 177 days |
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