| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64b - Trap Rock and Conglomerate Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 07069 - Watchung, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 48 | 58 | 63 | 61 | 54 | 42 | 34 | 26 | 41 |
| Avg Max Temp (°F) | 38 | 41 | 51 | 62 | 72 | 81 | 85 | 84 | 76 | 65 | 54 | 43 | 63 |
| Avg Precip (In.) | 4.04 | 2.98 | 4.13 | 4.13 | 4.73 | 4 | 5.14 | 4.38 | 4.66 | 3.85 | 4.11 | 3.83 | 49.99 |