Last frost dates in Indiana
117 NOAA weather stations in Indiana have thirty years of frost records. The median station sees its last 32 °F night around Apr 21; across the state that ranges from Mar 29 to May 2, so pick the station nearest you rather than a state-wide figure.
| EVANSVILLE MUSEUM | Mar 29 | Apr 11 | Mar 14 | Nov 10 | 225 |
| CANNELTON | Apr 2 | Apr 20 | Mar 16 | Nov 7 | 218 |
| NEWBURGH L&D | Apr 3 | Apr 17 | Mar 18 | Nov 2 | 214 |
| EVANSVILLE REGIONAL AP | Apr 4 | Apr 19 | Mar 22 | Oct 29 | 206 |
| JT MYERS LOCKS & DAM | Apr 5 | Apr 21 | Mar 21 | Oct 31 | 209 |
| TELL CITY | Apr 5 | Apr 23 | Mar 20 | Nov 1 | 208 |
| STENDAL | Apr 6 | Apr 23 | Mar 21 | Oct 30 | 206 |
| MT VERNON | Apr 7 | Apr 27 | Mar 25 | Oct 28 | 202 |
| FARMERSBURG TV-2 | Apr 8 | Apr 24 | Mar 25 | Oct 27 | 201 |
| CRANE NSA | Apr 9 | Apr 29 | Mar 22 | Oct 31 | 202 |
| ELNORA | Apr 9 | Apr 25 | Mar 27 | Oct 25 | 197 |
| FREELANDVILLE | Apr 9 | Apr 24 | Mar 25 | Oct 30 | 202 |
| VEVAY | Apr 9 | Apr 25 | Mar 26 | Nov 1 | 204 |
| BEDFORD 5 WNW | Apr 10 | Apr 30 | Mar 25 | Oct 30 | 201 |
| PATOKA LAKE | Apr 10 | Apr 26 | Mar 27 | Nov 1 | 204 |
| WASHINGTON 1 W | Apr 10 | Apr 27 | Mar 27 | Oct 25 | 197 |
| COLUMBUS | Apr 11 | Apr 30 | Mar 31 | Oct 25 | 195 |
| MADISON SEWAGE PLT | Apr 11 | Apr 28 | Mar 28 | Oct 31 | 201 |
| SAINT MEINRAD | Apr 11 | Apr 30 | Mar 27 | Oct 26 | 197 |
| VINCENNES 5 NE | Apr 11 | Apr 27 | Mar 30 | Oct 26 | 197 |
| BOONVILLE 1S | Apr 12 | Apr 28 | Mar 28 | Oct 25 | 196 |
| INDIANAPOLIS EAGLE CREEK AP | Apr 12 | Apr 29 | Mar 30 | Oct 29 | 198 |
| INDIANAPOLIS NWFO | Apr 12 | Apr 28 | Mar 31 | Oct 27 | 196 |
| PRINCETON 1 W | Apr 13 | Apr 30 | Mar 29 | Oct 25 | 194 |
| SHAKAMAK SP | Apr 14 | May 1 | Mar 31 | Oct 26 | 193 |
| SHELBYVILLE MUNI AP | Apr 14 | Apr 29 | Mar 31 | Oct 23 | 191 |
| TERRE HAUTE CAA AP | Apr 14 | May 2 | Mar 31 | Oct 24 | 192 |
| BLOOMINGTON INDIANA UNIV | Apr 15 | May 3 | Mar 31 | Oct 26 | 192 |
| GREENSBURG | Apr 15 | May 2 | Mar 31 | Oct 26 | 194 |
| INDIANAPOLIS | Apr 15 | May 2 | Apr 2 | Oct 26 | 193 |
| SHOALS 8 S | Apr 15 | May 2 | Mar 31 | Oct 23 | 189 |
| TERRE HAUTE INDIANA STATE | Apr 15 | May 3 | Mar 31 | Oct 19 | 187 |
| MUNCIE DELAWARE CO AP | Apr 16 | May 2 | Apr 1 | Oct 25 | 190 |
| SEYMOUR 2 N | Apr 16 | May 2 | Apr 2 | Oct 21 | 187 |
| TERRE HAUTE HULMAN RGNL AP | Apr 16 | May 3 | Apr 2 | Oct 18 | 183 |
| BLOOMINGTON MONROE CO AP | Apr 17 | May 5 | Apr 3 | Oct 22 | 185 |
| ENGLISH | Apr 17 | May 4 | Mar 31 | Oct 19 | 184 |
| SALEM | Apr 17 | May 4 | Apr 2 | Oct 22 | 186 |
| SHELBYVILLE SEWAGE PLT | Apr 17 | May 3 | Apr 3 | Oct 22 | 187 |
| CASTLETON 2 S | Apr 18 | May 6 | Apr 3 | Oct 26 | 190 |
| SCOTTSBURG | Apr 18 | May 3 | Apr 4 | Oct 20 | 185 |
| ANDERSON SEWAGE PLT | Apr 19 | May 5 | Apr 3 | Oct 23 | 186 |
| GREENFIELD | Apr 19 | May 7 | Apr 6 | Oct 22 | 185 |
| LAPORTE | Apr 19 | May 3 | Apr 5 | Oct 27 | 191 |
| RUSHVILLE | Apr 19 | May 5 | Apr 4 | Oct 23 | 185 |
| BROOKVILLE | Apr 20 | May 7 | Apr 6 | Oct 21 | 182 |
| FRANKLIN WWTP | Apr 20 | May 7 | Apr 7 | Oct 19 | 180 |
| INDIANAPOLIS SE SIDE | Apr 20 | May 5 | Apr 6 | Oct 21 | 183 |
| LAFAYETTE 8 S | Apr 20 | May 6 | Apr 6 | Oct 20 | 182 |
| LOGANSPORT CICOTT ST | Apr 20 | May 6 | Apr 6 | Oct 23 | 185 |
| OOLITIC PURDUE EX FM | Apr 20 | May 7 | Apr 6 | Oct 20 | 181 |
| PETERSBURG 61 BRG | Apr 20 | May 4 | Apr 6 | Oct 22 | 186 |
| SPENCER | Apr 20 | May 7 | Apr 6 | Oct 20 | 180 |
| VALPARAISO PORTER CO MUNI AP | Apr 20 | May 7 | Apr 6 | Oct 26 | 187 |
| WINCHESTER AIRPORT 3 E | Apr 20 | May 5 | Apr 6 | Oct 21 | 183 |
| CARMEL 3 E | Apr 21 | May 8 | Apr 5 | Oct 21 | 183 |
| FRANKFORT DISPOSAL | Apr 21 | May 7 | Apr 7 | Oct 21 | 181 |
| N VERNON 2 ESE | Apr 21 | May 10 | Apr 6 | Oct 21 | 180 |
| PAOLI | Apr 21 | May 7 | Apr 6 | Oct 18 | 178 |
| WHITESTOWN | Apr 21 | May 6 | Apr 6 | Oct 20 | 180 |
| ATTICA 2E | Apr 22 | May 8 | Apr 8 | Oct 17 | 176 |
| DELPHI 2 N | Apr 22 | May 6 | Apr 7 | Oct 17 | 179 |
| HARTFORD CITY 4 ESE | Apr 22 | May 7 | Apr 6 | Oct 22 | 181 |
| INDIANA DUNES NL | Apr 22 | May 8 | Apr 7 | Oct 27 | 188 |
| VALPARAISO WTR WKS | Apr 22 | May 6 | Apr 7 | Oct 25 | 185 |
| BERNE WWTP | Apr 23 | May 7 | Apr 9 | Oct 22 | 181 |
| DECATUR 1 N | Apr 23 | May 8 | Apr 7 | Oct 19 | 178 |
| JAMESTOWN 2 E | Apr 23 | May 9 | Apr 8 | Oct 19 | 178 |
| KENTLAND | Apr 23 | May 8 | Apr 10 | Oct 14 | 175 |
| PERRYSVILLE 4 WNW | Apr 23 | May 7 | Apr 10 | Oct 14 | 171 |
| RENSSELAER | Apr 23 | May 7 | Apr 9 | Oct 18 | 177 |
| ROCHESTER | Apr 23 | May 9 | Apr 9 | Oct 21 | 180 |
| S BEND | Apr 23 | May 9 | Apr 11 | Oct 23 | 181 |
| TIPTON 5 SW | Apr 23 | May 9 | Apr 9 | Oct 17 | 174 |
| WABASH | Apr 23 | May 9 | Apr 8 | Oct 21 | 181 |
| BLUFFTON 6N | Apr 24 | May 9 | Apr 10 | Oct 20 | 179 |
| ELWOOD | Apr 24 | May 10 | Apr 8 | Oct 18 | 175 |
| FT WAYNE INTL AP | Apr 24 | May 10 | Apr 10 | Oct 21 | 178 |
| MARTINSVILLE 2 SW | Apr 24 | May 11 | Apr 10 | Oct 15 | 173 |
| NORTHERN INDIANA WFO | Apr 24 | May 10 | Apr 9 | Oct 24 | 182 |
| RICHMOND WTR WKS | Apr 24 | May 10 | Apr 8 | Oct 20 | 180 |
| BOSWELL 4WNW | Apr 25 | May 12 | Apr 13 | Oct 13 | 169 |
| CHALMERS 5 W | Apr 25 | May 11 | Apr 11 | Oct 17 | 173 |
| DUBOIS S IN FORAGE FM | Apr 25 | May 12 | Apr 10 | Oct 15 | 172 |
| FARMLAND 5 NNW | Apr 25 | May 11 | Apr 11 | Oct 16 | 173 |
| PLYMOUTH | Apr 25 | May 13 | Apr 12 | Oct 21 | 178 |
| WHEATFIELD | Apr 25 | May 11 | Apr 12 | Oct 17 | 173 |
| WINAMAC 2SSE | Apr 25 | May 11 | Apr 11 | Oct 18 | 173 |
| YOUNG AMERICA | Apr 25 | May 11 | Apr 11 | Oct 17 | 174 |
| FRANCESVILLE | Apr 26 | May 12 | Apr 12 | Oct 17 | 173 |
| GOSHEN 3SW | Apr 26 | May 12 | Apr 13 | Oct 21 | 175 |
| KNOX WWTP | Apr 26 | May 12 | Apr 12 | Oct 19 | 174 |
| LAFAYETTE PURDUE UNIV AP | Apr 26 | May 14 | Apr 11 | Oct 18 | 173 |
| LAGRANGE | Apr 26 | May 14 | Apr 13 | Oct 21 | 176 |
| MARION 2 N | Apr 26 | May 12 | Apr 11 | Oct 20 | 175 |
| N MANCHESTER WWTP | Apr 26 | May 11 | Apr 12 | Oct 19 | 174 |
| W LAFAYETTE 6 NW | Apr 26 | May 11 | Apr 12 | Oct 12 | 169 |
| CAMBRIDGE CITY 3 N | Apr 27 | May 10 | Apr 16 | Oct 9 | 164 |
| COLUMBIA CITY | Apr 27 | May 14 | Apr 14 | Oct 17 | 171 |
| CRAWFORDSVILLE 6 SE | Apr 27 | May 13 | Apr 11 | Oct 12 | 167 |
| GREENCASTLE 1 W | Apr 27 | May 15 | Apr 13 | Oct 15 | 169 |
| KOKOMO 3 WSW | Apr 27 | May 13 | Apr 13 | Oct 18 | 174 |
| NEW CASTLE 3 SW | Apr 27 | May 12 | Apr 11 | Oct 17 | 173 |
| WOODBURN 3N | Apr 27 | May 11 | Apr 13 | Oct 19 | 174 |
| GOSHEN MUNI AP | Apr 28 | May 13 | Apr 14 | Oct 19 | 171 |
| PORTLAND 1 SW | Apr 28 | May 14 | Apr 13 | Oct 15 | 171 |
| WARSAW | Apr 28 | May 14 | Apr 13 | Oct 18 | 170 |
| GARRETT | Apr 29 | May 11 | Apr 15 | Oct 17 | 171 |
| LOWELL | Apr 29 | May 14 | Apr 14 | Oct 16 | 171 |
| WANATAH 2 WNW | Apr 29 | May 14 | Apr 15 | Oct 13 | 166 |
| ANGOLA | Apr 30 | May 15 | Apr 17 | Oct 16 | 167 |
| MILAN 5 NE | Apr 30 | May 15 | Apr 14 | Oct 16 | 168 |
| ROCKVILLE | Apr 30 | May 15 | Apr 14 | Oct 12 | 164 |
| HUNTINGTON | May 1 | May 16 | Apr 17 | Oct 14 | 166 |
| LAKEVILLE | May 1 | May 18 | Apr 18 | Oct 13 | 163 |
| SOUTH BEND MICHIANA RGNL AP | May 1 | May 17 | Apr 16 | Oct 19 | 170 |
| GARRETT 1 S | May 2 | May 16 | Apr 19 | Oct 10 | 159 |
How to read the three dates
Average is the date by which, in half of the years between 1991 and 2020, the last 32 °F night had already happened. Safe is later: only one year in ten saw a frost after it, which is the date to set out frost-tender plants such as dahlia tubers and zinnia seedlings. Early is the risky end, with a frost after it in nine years out of ten.
Every figure is for the weather station, not for your garden. A valley bottom, a north slope or a spot near a lake can run a week or two either way. Cities are warmer than the countryside around them.
Where the numbers come from
The dates are NOAA's U.S. Climate Normals for 1991 to 2020, computed by the National Centers for Environmental Information for every station with thirty years of daily minimum temperatures. ZIP codes are matched to the nearest such station within 150 km using U.S. Census Bureau ZIP Code Tabulation Area centroids. Stations that never see a frost, such as much of south Florida, report no date and are left out.