| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58i - Glaciated Reading Prong |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 07435 - Newfoundland, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 26 | 35 | 45 | 54 | 59 | 57 | 49 | 37 | 30 | 21 | 37 |
| Avg Max Temp (°F) | 35 | 38 | 47 | 58 | 70 | 78 | 83 | 81 | 74 | 63 | 52 | 40 | 60 |
| Avg Precip (In.) | 4.36 | 3.3 | 4.5 | 4.54 | 4.84 | 4.63 | 4.61 | 4.43 | 5.03 | 4.09 | 4.52 | 4.02 | 52.88 |