| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| 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 07924 - Bernardsville, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 47 | 56 | 61 | 60 | 52 | 40 | 32 | 24 | 40 |
| Avg Max Temp (°F) | 37 | 40 | 50 | 61 | 71 | 80 | 84 | 82 | 75 | 64 | 53 | 42 | 62 |
| Avg Precip (In.) | 4.11 | 2.95 | 4.12 | 4.32 | 4.81 | 4.3 | 4.94 | 4.41 | 4.84 | 3.9 | 4.18 | 3.89 | 50.77 |