Iowa frost dates: E
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Eagle Grove | Apr 30 | Oct 10 | 163 d | 5a |
| Earlham | Apr 30 | Oct 3 | 156 d | 5b |
| Earling | Apr 27 | Oct 9 | 165 d | 5b |
| Earlville | May 3 | Oct 4 | 154 d | 5a |
| Early | Apr 30 | Oct 6 | 159 d | 5a |
| Eddyville | Apr 23 | Oct 14 | 174 d | 5b |
| Edgewood | May 8 | Oct 1 | 146 d | 4b |
| Elberon | Apr 28 | Oct 10 | 165 d | 5a |
| Eldon | Apr 27 | Oct 12 | 168 d | 5b |
| Eldora | Apr 27 | Oct 10 | 166 d | 5a |
| Eldridge | Apr 21 | Oct 17 | 179 d | 5b |
| Elgin | May 1 | Oct 3 | 155 d | 5a |
| Elk Horn | May 2 | Oct 3 | 154 d | 5a |
| Elkader | May 8 | Oct 1 | 146 d | 4b |
| Elkhart | Apr 23 | Oct 15 | 175 d | 5b |
| Elkport | May 8 | Oct 1 | 146 d | 4b |
| Elliott | Apr 24 | Oct 13 | 172 d | 5b |
| Ellston | Apr 23 | Oct 17 | 177 d | 5b |
| Ellsworth | May 3 | Oct 2 | 152 d | 5a |
| Elma | May 2 | Oct 5 | 156 d | 4b |
| Ely | Apr 27 | Oct 11 | 167 d | 5a |
| Emerson | Apr 24 | Oct 13 | 172 d | 5b |
| Emmetsburg | Apr 27 | Oct 7 | 163 d | 5a |
| Epworth | Apr 28 | Oct 10 | 165 d | 5a |
| Essex | Apr 20 | Oct 17 | 180 d | 5b |
| Estherville | May 2 | Oct 3 | 154 d | 5a |
| Evansdale | Apr 27 | Oct 10 | 166 d | 5a |
| Everly | May 2 | Oct 2 | 153 d | 5a |
| Exira | May 2 | Oct 3 | 154 d | 5a |
| Exline | Apr 28 | Oct 14 | 169 d | 5b |