Frost dates in Indiana
Across Indiana, the typical last spring frost is around Apr 22 and the first fall frost around Oct 21. Your own dates depend on where you are in the state; find your county below.
Most of the state's last spring frosts fall between Apr 10 and Apr 28, and its first fall frosts between Oct 15 and Oct 29.
These are the dates with a 50% chance of a 32°F frost on or after (spring) or on or before (fall), so plan tender crops a week or two after the spring date and keep row cover handy. For dates at your exact ZIP code, use the zone and frost date lookup; for what to plant when, see the planting guide by frost date.
Hardiness zones in Indiana: zone 5b, zone 6a, zone 6b, zone 7a
Frost dates by county in Indiana
| County | Last spring frost | First fall frost | Growing season |
|---|---|---|---|
| Adams | Apr 23 | Oct 22 | About 182 days |
| Allen | Apr 24 | Oct 21 | About 180 days |
| Bartholomew | Apr 11 | Oct 25 | About 197 days |
| Benton | Apr 25 | Oct 13 | About 171 days |
| Blackford | Apr 22 | Oct 22 | About 183 days |
| Boone | Apr 23 | Oct 20 | About 180 days |
| Brown | Apr 24 | Oct 19 | About 178 days |
| Carroll | Apr 25 | Oct 17 | About 175 days |
| Cass | Apr 20 | Oct 23 | About 186 days |
| Clark | Apr 11 | Oct 31 | About 203 days |
| Clay | Apr 14 | Oct 24 | About 193 days |
| Clinton | Apr 21 | Oct 21 | About 183 days |
| Crawford | Apr 17 | Oct 19 | About 185 days |
| Daviess | Apr 10 | Oct 25 | About 198 days |
| Dearborn | Apr 30 | Oct 16 | About 169 days |
| Decatur | Apr 15 | Oct 26 | About 194 days |
| DeKalb | Apr 29 | Oct 17 | About 171 days |
| Delaware | Apr 16 | Oct 25 | About 192 days |
| Dubois | Apr 10 | Oct 30 | About 203 days |
| Elkhart | Apr 26 | Oct 21 | About 178 days |
| Fayette | Apr 20 | Oct 21 | About 184 days |
| Floyd | Mar 31 | Nov 9 | About 223 days |
| Fountain | Apr 22 | Oct 17 | About 178 days |
| Franklin | Apr 20 | Oct 21 | About 184 days |
| Fulton | Apr 23 | Oct 21 | About 181 days |
| Gibson | Apr 13 | Oct 25 | About 195 days |
| Grant | Apr 26 | Oct 20 | About 177 days |
| Greene | Apr 14 | Oct 26 | About 195 days |
| Hamilton | Apr 21 | Oct 21 | About 183 days |
| Hancock | Apr 19 | Oct 22 | About 186 days |
| Harrison | Apr 19 | Oct 24 | About 188 days |
| Hendricks | Apr 23 | Oct 27 | About 187 days |
| Henry | Apr 27 | Oct 17 | About 173 days |
| Howard | Apr 27 | Oct 18 | About 174 days |
| Huntington | May 1 | Oct 14 | About 166 days |
| Jackson | Apr 17 | Oct 21 | About 187 days |
| Jasper | Apr 25 | Oct 18 | About 176 days |
| Jay | Apr 25 | Oct 22 | About 180 days |
| Jefferson | Apr 18 | Oct 31 | About 196 days |
| Jennings | Apr 21 | Oct 21 | About 183 days |
| Johnson | Apr 20 | Oct 19 | About 182 days |
| Knox | Apr 9 | Oct 30 | About 204 days |
| Kosciusko | Apr 28 | Oct 18 | About 173 days |
| LaGrange | Apr 26 | Oct 21 | About 178 days |
| Lake | Apr 23 | Oct 20 | About 180 days |
| LaPorte | Apr 22 | Oct 27 | About 188 days |
| Lawrence | Apr 20 | Oct 20 | About 183 days |
| Madison | Apr 19 | Oct 23 | About 187 days |
| Marion | Apr 18 | Oct 26 | About 191 days |
| Marshall | Apr 25 | Oct 21 | About 179 days |
| Martin | Apr 15 | Oct 23 | About 191 days |
| Miami | Apr 23 | Oct 21 | About 181 days |
| Monroe | Apr 15 | Oct 26 | About 194 days |
| Montgomery | Apr 27 | Oct 12 | About 168 days |
| Morgan | Apr 24 | Oct 15 | About 174 days |
| Newton | Apr 23 | Oct 16 | About 176 days |
| Noble | Apr 26 | Oct 24 | About 181 days |
| Ohio | Apr 23 | Oct 21 | About 181 days |
| Orange | Apr 21 | Oct 18 | About 180 days |
| Owen | Apr 20 | Oct 20 | About 183 days |
| Parke | Apr 30 | Oct 12 | About 165 days |
| Perry | Apr 11 | Nov 1 | About 204 days |
| Pike | Apr 20 | Oct 30 | About 193 days |
| Porter | Apr 22 | Oct 26 | About 187 days |
| Posey | Apr 7 | Oct 28 | About 204 days |
| Pulaski | Apr 25 | Oct 18 | About 176 days |
| Putnam | Apr 27 | Oct 15 | About 171 days |
| Randolph | Apr 20 | Oct 21 | About 184 days |
| Ripley | Apr 30 | Oct 16 | About 169 days |
| Rush | Apr 19 | Oct 23 | About 187 days |
| Scott | Apr 18 | Oct 20 | About 185 days |
| Shelby | Apr 17 | Oct 22 | About 188 days |
| Spencer | Apr 11 | Oct 26 | About 198 days |
| St. Joseph | Apr 23 | Oct 23 | About 183 days |
| Starke | Apr 26 | Oct 19 | About 176 days |
| Steuben | Apr 30 | Oct 16 | About 169 days |
| Sullivan | Apr 9 | Oct 27 | About 201 days |
| Switzerland | Apr 23 | Oct 29 | About 189 days |
| Tippecanoe | Apr 22 | Oct 18 | About 179 days |
| Tipton | Apr 24 | Oct 18 | About 177 days |
| Union | Apr 20 | Oct 21 | About 184 days |
| Vanderburgh | Mar 29 | Nov 10 | About 226 days |
| Vermillion | Apr 23 | Oct 14 | About 174 days |
| Vigo | Apr 15 | Oct 19 | About 187 days |
| Wabash | Apr 26 | Oct 19 | About 176 days |
| Warren | Apr 22 | Oct 17 | About 178 days |
| Warrick | Apr 6 | Oct 30 | About 207 days |
| Washington | Apr 17 | Oct 22 | About 188 days |
| Wayne | Apr 27 | Oct 9 | About 165 days |
| Wells | Apr 24 | Oct 20 | About 179 days |
| White | Apr 25 | Oct 17 | About 175 days |
| Whitley | Apr 27 | Oct 17 | About 173 days |
Source: NOAA NCEI U.S. Climate Normals 1991–2020, 50% probability of 32°F, from the weather station nearest each ZIP code; each county shows the middle value across its ZIP codes. Hills, valleys and cities can run a week or more earlier or later.