Indiana frost dates: Last spring and first autumn frost at every NOAA station, 1991-2020
Across Indiana's 117 NOAA stations with frost dates, the median last spring frost (32°F) runs from March 29 in Evansville Museum to May 2 in Garrett (1 mi S); for half of its places it comes after April 22.
- Typical last spring frost
- April 22median of 99 places
- Typical first autumn frost
- October 20median of 99 places
- Earliest last frost
- March 29Evansville Museum
- Latest last frost
- May 2Garrett (1 mi S)
When is the last frost in Indiana, town by town?
Each date is NOAA's: "after April 22 in half of years" means the last 32°F night of spring came after April 22 in half of the years 1991-2020. By the 1-in-10 date, the last frost has passed in nine years out of ten.
Find your town in the list, or look up a ZIP code for the stations nearest it.
| Place or station | Last frost (median) | 1 in 10 after | First frost (median) | 1 in 10 before | Growing season | Zone |
|---|---|---|---|---|---|---|
| Evansville Museum | March 29 | April 11 | November 10 | October 27 | 225 days | – |
| Cannelton | April 2 | April 20 | November 7 | October 28 | 218 days | – |
| NewburghNewburgh Lock and Dam | April 3 | April 17 | November 2 | October 22 | 214 days | – |
| EvansvilleEvansville Regional Airport | April 4 | April 19 | October 29 | October 17 | 206 days | 7a |
| J.T. Myers Locks & Dam | April 5 | April 21 | October 31 | October 19 | 209 days | – |
| Tell City | April 5 | April 23 | November 1 | October 18 | 208 days | 7b |
| Stendal | April 6 | April 23 | October 30 | October 16 | 206 days | – |
| Mount Vernon | April 7 | April 27 | October 28 | October 10 | 202 days | 7a |
| FarmersburgFarmersburg Tv-2 | April 8 | April 24 | October 27 | October 12 | 201 days | – |
| CraneCrane Nsa | April 9 | April 29 | October 31 | October 15 | 202 days | – |
| Elnora | April 9 | April 25 | October 25 | October 12 | 197 days | – |
| Freelandville | April 9 | April 24 | October 30 | October 17 | 202 days | 6b |
| Vevay | April 9 | April 25 | November 1 | October 20 | 204 days | – |
| Bedford5 mi WNW | April 10 | April 30 | October 30 | October 16 | 201 days | – |
| Patoka Lake | April 10 | April 26 | November 1 | October 20 | 204 days | – |
| Washington1 mi W | April 10 | April 27 | October 25 | October 11 | 197 days | 6b |
| Columbus | April 11 | April 30 | October 25 | October 12 | 195 days | 6b |
| MadisonMadison Sewage Plant | April 11 | April 28 | October 31 | October 15 | 201 days | – |
| St. MeinradSaint Meinrad | April 11 | April 30 | October 26 | October 13 | 197 days | 6b |
| Vincennes5 mi NE | April 11 | April 27 | October 26 | October 11 | 197 days | 6b |
| Boonville1 mi S | April 12 | April 28 | October 25 | October 12 | 196 days | 6b |
| Indianapolis Eagle Creek Airport | April 12 | April 29 | October 29 | October 16 | 198 days | 6b |
| Indianapolis Nwfo | April 12 | April 28 | October 27 | October 14 | 196 days | – |
| Princeton1 mi W | April 13 | April 30 | October 25 | October 10 | 194 days | 6b |
| Shakamak State Park | April 14 | May 1 | October 26 | October 12 | 193 days | – |
| ShelbyvilleShelbyville Municipal Airport | April 14 | April 29 | October 23 | October 11 | 191 days | 6b |
| Terre Haute Caa Airport | April 14 | May 2 | October 24 | October 7 | 192 days | 6a |
| Bloomington Indiana University | April 15 | May 3 | October 26 | October 11 | 192 days | 6b |
| Greensburg | April 15 | May 2 | October 26 | October 12 | 194 days | 6b |
| IndianapolisIndianapolis International Airport | April 15 | May 2 | October 26 | October 13 | 193 days | 6b |
| Shoals8 mi S | April 15 | May 2 | October 23 | October 10 | 189 days | 6b |
| Terre Haute Indiana State | April 15 | May 3 | October 19 | October 4 | 187 days | – |
| MuncieMuncie Delaware County Airport | April 16 | May 2 | October 25 | October 9 | 190 days | 6b |
| Seymour2 mi N | April 16 | May 2 | October 21 | October 7 | 187 days | 6b |
| Terre HauteTerre Haute Hulman Regional Airport | April 16 | May 3 | October 18 | October 4 | 183 days | 6a |
| BloomingtonBloomington Monroe County Airport | April 17 | May 5 | October 22 | October 8 | 185 days | 6a |
| English | April 17 | May 4 | October 19 | October 6 | 184 days | – |
| Salem | April 17 | May 4 | October 22 | October 7 | 186 days | – |
| Shelbyville Sewage Plant | April 17 | May 3 | October 22 | October 9 | 187 days | 6b |
| Castleton (2 mi S) | April 18 | May 6 | October 26 | October 12 | 190 days | 6b |
| Scottsburg | April 18 | May 3 | October 20 | October 6 | 185 days | – |
| AndersonAnderson Sewage Plant | April 19 | May 5 | October 23 | October 7 | 186 days | 6a |
| Greenfield | April 19 | May 7 | October 22 | October 9 | 185 days | 6a |
| La PorteLaporte | April 19 | May 3 | October 27 | October 14 | 191 days | 6a |
| Rushville | April 19 | May 5 | October 23 | October 11 | 185 days | 6a |
| Beech GroveIndianapolis SE Side | April 20 | May 5 | October 21 | October 7 | 183 days | 6b |
| Brookville | April 20 | May 7 | October 21 | October 6 | 182 days | 6b |
| FranklinFranklin Wastewater Treatment Plant | April 20 | May 7 | October 19 | October 7 | 180 days | 6b |
| Lafayette (8 mi S) | April 20 | May 6 | October 20 | October 4 | 182 days | 6a |
| LogansportLogansport Cicott St | April 20 | May 6 | October 23 | October 11 | 185 days | 6a |
| OoliticOolitic Purdue Ex Farm | April 20 | May 7 | October 20 | October 6 | 181 days | 6a |
| PetersburgPetersburg 61 Bridge | April 20 | May 4 | October 22 | October 8 | 186 days | – |
| Spencer | April 20 | May 7 | October 20 | October 7 | 180 days | 6a |
| ValparaisoValparaiso Porter County Municipal Airport | April 20 | May 7 | October 26 | October 12 | 187 days | 6a |
| WinchesterWinchester Airport (3 mi E) | April 20 | May 5 | October 21 | October 7 | 183 days | 6a |
| Carmel3 mi E | April 21 | May 8 | October 21 | October 6 | 183 days | – |
| FrankfortFrankfort Disposal | April 21 | May 7 | October 21 | October 6 | 181 days | 6a |
| North Vernon2 mi ESE | April 21 | May 10 | October 21 | October 7 | 180 days | 6b |
| Paoli | April 21 | May 7 | October 18 | October 6 | 178 days | 6a |
| Whitestown | April 21 | May 6 | October 20 | October 5 | 180 days | 6a |
| Attica2 mi E | April 22 | May 8 | October 17 | October 1 | 176 days | 5b |
| Delphi2 mi N | April 22 | May 6 | October 17 | October 3 | 179 days | – |
| Hartford City4 mi ESE | April 22 | May 7 | October 22 | October 7 | 181 days | 6a |
| Indiana Dunes National Lakeshore | April 22 | May 8 | October 27 | October 15 | 188 days | 6a |
| Valparaiso Water Works | April 22 | May 6 | October 25 | October 12 | 185 days | – |
| BerneBerne Wastewater Treatment Plant | April 23 | May 7 | October 22 | October 9 | 181 days | 6a |
| Decatur1 mi N | April 23 | May 8 | October 19 | October 5 | 178 days | 6a |
| Jamestown2 mi E | April 23 | May 9 | October 19 | October 4 | 178 days | 6a |
| Kentland | April 23 | May 8 | October 14 | October 1 | 175 days | – |
| Perrysville4 mi WNW | April 23 | May 7 | October 14 | September 29 | 171 days | 6a |
| Rensselaer | April 23 | May 7 | October 18 | October 4 | 177 days | 6a |
| Rochester | April 23 | May 9 | October 21 | October 6 | 180 days | 6a |
| South Bend station | April 23 | May 9 | October 23 | October 9 | 181 days | – |
| Tipton5 mi SW | April 23 | May 9 | October 17 | October 3 | 174 days | 6a |
| Wabash | April 23 | May 9 | October 21 | October 6 | 181 days | – |
| Bluffton6 mi N | April 24 | May 9 | October 20 | October 6 | 179 days | 6a |
| Elwood | April 24 | May 10 | October 18 | October 4 | 175 days | – |
| Fort WayneFort Wayne International Airport | April 24 | May 10 | October 21 | October 8 | 178 days | 6a |
| Martinsville2 mi SW | April 24 | May 11 | October 15 | October 2 | 173 days | 6a |
| Northern Indiana Weather Office | April 24 | May 10 | October 24 | October 12 | 182 days | – |
| RichmondRichmond Water Works | April 24 | May 10 | October 20 | October 7 | 180 days | 6a |
| Boswell4 mi WNW | April 25 | May 12 | October 13 | September 27 | 169 days | 5b |
| Chalmers5 mi W | April 25 | May 11 | October 17 | October 1 | 173 days | 5b |
| DuboisDubois S In Forage Farm | April 25 | May 12 | October 15 | October 3 | 172 days | 6b |
| Farmland5 mi NNW | April 25 | May 11 | October 16 | October 1 | 173 days | 6a |
| Plymouth | April 25 | May 13 | October 21 | October 5 | 178 days | 6a |
| Wheatfield | April 25 | May 11 | October 17 | October 3 | 173 days | – |
| Winamac2 mi SSE | April 25 | May 11 | October 18 | October 1 | 173 days | 6a |
| Young America | April 25 | May 11 | October 17 | October 1 | 174 days | 5b |
| Francesville | April 26 | May 12 | October 17 | October 2 | 173 days | 6a |
| Goshen (3 mi SW) | April 26 | May 12 | October 21 | October 6 | 175 days | 6a |
| KnoxKnox Wastewater Treatment Plant | April 26 | May 12 | October 19 | October 5 | 174 days | – |
| LafayetteLafayette Purdue University Airport | April 26 | May 14 | October 18 | October 4 | 173 days | 6a |
| Lagrange | April 26 | May 14 | October 21 | October 5 | 176 days | – |
| Marion2 mi N | April 26 | May 12 | October 20 | October 5 | 175 days | 6a |
| North ManchesterNorth Manchester Wastewater Treatment Plant | April 26 | May 11 | October 19 | October 5 | 174 days | – |
| West Lafayette6 mi NW | April 26 | May 11 | October 12 | September 27 | 169 days | 5b |
| Cambridge City3 mi N | April 27 | May 10 | October 9 | September 28 | 164 days | – |
| Columbia City | April 27 | May 14 | October 17 | October 1 | 171 days | 5b |
| Crawfordsville6 mi SE | April 27 | May 13 | October 12 | September 26 | 167 days | 5b |
| Greencastle1 mi W | April 27 | May 15 | October 15 | October 1 | 169 days | 6a |
| Kokomo3 mi WSW | April 27 | May 13 | October 18 | October 4 | 174 days | 5b |
| New Castle3 mi SW | April 27 | May 12 | October 17 | October 4 | 173 days | 6a |
| Woodburn3 mi N | April 27 | May 11 | October 19 | October 4 | 174 days | – |
| GoshenGoshen Municipal Airport | April 28 | May 13 | October 19 | October 4 | 171 days | 6a |
| Portland1 mi SW | April 28 | May 14 | October 15 | October 1 | 171 days | 6a |
| Warsaw | April 28 | May 14 | October 18 | October 1 | 170 days | – |
| Garrett | April 29 | May 11 | October 17 | October 4 | 171 days | – |
| Lowell | April 29 | May 14 | October 16 | October 3 | 171 days | 5b |
| Wanatah2 mi WNW | April 29 | May 14 | October 13 | October 1 | 166 days | 5b |
| Angola | April 30 | May 15 | October 16 | October 1 | 167 days | 6a |
| Milan5 mi NE | April 30 | May 15 | October 16 | October 3 | 168 days | – |
| Rockville | April 30 | May 15 | October 12 | September 30 | 164 days | 6a |
| Huntington | May 1 | May 16 | October 14 | October 1 | 166 days | 6a |
| Lakeville | May 1 | May 18 | October 13 | September 30 | 163 days | 5b |
| South BendSouth Bend Airport | May 1 | May 17 | October 19 | October 5 | 170 days | 6a |
| Garrett (1 mi S) | May 2 | May 16 | October 10 | September 26 | 159 days | – |
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities, growing-season length); station daily lows via ACIS (zone). Growing season: NOAA's median number of days between the last spring and first autumn 32°F night. Zone: the USDA's plant hardiness rule applied to the station's own 1991-2020 coldest nights.