| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 63a - Delaware River Terraces and Uplands |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 08065 - Palmyra, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 33 | 41 | 51 | 61 | 66 | 64 | 57 | 45 | 37 | 28 | 44 |
| Avg Max Temp (°F) | 41 | 44 | 53 | 64 | 74 | 83 | 87 | 85 | 78 | 67 | 56 | 45 | 65 |
| Avg Precip (In.) | 3.83 | 2.9 | 4.08 | 3.89 | 4.4 | 3.92 | 4.74 | 4.76 | 4.24 | 3.4 | 3.56 | 3.62 | 47.36 |