| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 71b - Mitchell Plain |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 47164 - Palmyra, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 25 | 33 | 42 | 51 | 60 | 64 | 62 | 55 | 43 | 35 | 26 | 43 |
| Avg Max Temp (°F) | 39 | 46 | 57 | 67 | 76 | 84 | 87 | 86 | 80 | 68 | 55 | 44 | 66 |
| Avg Precip (In.) | 3.23 | 3.11 | 4.31 | 4.41 | 4.94 | 4.09 | 4.39 | 3.83 | 3.17 | 2.96 | 3.93 | 3.66 | 46.02 |