| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 08069 - Penns Grove, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 26 | 34 | 43 | 53 | 62 | 67 | 66 | 59 | 47 | 38 | 30 | 46 |
| Avg Max Temp (°F) | 40 | 43 | 52 | 63 | 73 | 82 | 87 | 85 | 77 | 66 | 55 | 45 | 64 |
| Avg Precip (In.) | 3.62 | 2.91 | 4.13 | 3.72 | 4.32 | 3.84 | 4.33 | 3.91 | 4.29 | 3.31 | 3.57 | 3.61 | 45.56 |