| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°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: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 84d - Inner Coastal Plain |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 07733 - Holmdel, NJ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 31 | 40 | 50 | 60 | 65 | 63 | 56 | 44 | 36 | 28 | 43 |
| Avg Max Temp (°F) | 39 | 42 | 50 | 61 | 71 | 80 | 85 | 83 | 76 | 65 | 55 | 44 | 63 |
| Avg Precip (In.) | 3.94 | 3.05 | 4.17 | 3.98 | 4.18 | 3.63 | 4.54 | 4.42 | 4.18 | 3.58 | 4.01 | 3.79 | 47.49 |