Indiana frost dates: A
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Advance | Apr 23 | Oct 19 | 179 d | 6a |
| Akron | Apr 23 | Oct 21 | 181 d | 6a |
| Alamo | Apr 27 | Oct 12 | 168 d | 6a |
| Albany | Apr 25 | Oct 16 | 174 d | 6a |
| Albion | Apr 27 | Oct 17 | 173 d | 6a |
| Alexandria | Apr 24 | Oct 18 | 177 d | 6a |
| Ambia | Apr 25 | Oct 13 | 171 d | 6a |
| Amboy | Apr 23 | Oct 21 | 181 d | 6a |
| Amo | Apr 27 | Oct 15 | 171 d | 6a |
| Anderson | Apr 19 | Oct 23 | 187 d | 6a |
| Andrews | May 1 | Oct 14 | 166 d | 6a |
| Angola | Apr 30 | Oct 16 | 169 d | 6a |
| Arcadia | Apr 23 | Oct 17 | 177 d | 6a |
| Arcola | Apr 24 | Oct 21 | 180 d | 6a |
| Argos | Apr 25 | Oct 21 | 179 d | 6a |
| Arlington | Apr 19 | Oct 23 | 187 d | 6a |
| Ashley | Apr 30 | Oct 16 | 169 d | 6a |
| Athens | Apr 23 | Oct 21 | 181 d | 6a |
| Atlanta | Apr 23 | Oct 17 | 177 d | 6a |
| Attica | Apr 22 | Oct 17 | 178 d | 6a |
| Atwood | Apr 28 | Oct 18 | 173 d | 6a |
| Auburn | May 2 | Oct 10 | 161 d | 6a |
| Aurora | Apr 30 | Oct 16 | 169 d | 6b |
| Austin | Apr 18 | Oct 20 | 185 d | 6b |
| Avilla | Apr 29 | Oct 17 | 171 d | 6a |
| Avoca | Apr 20 | Oct 20 | 183 d | 6b |
| Avon | Apr 12 | Oct 29 | 200 d | 6a |