| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| 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: | 63d - Virginian Barrier Islands and Coastal Marshes |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 19944 - Fenwick Island, DE | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 35 | 43 | 53 | 62 | 67 | 67 | 61 | 50 | 40 | 32 | 47 |
| Avg Max Temp (°F) | 45 | 47 | 54 | 63 | 71 | 80 | 85 | 84 | 79 | 69 | 59 | 50 | 65 |
| Avg Precip (In.) | 3.97 | 3.23 | 4.48 | 3.44 | 3.78 | 3.23 | 3.97 | 4.96 | 3.69 | 3.36 | 3.28 | 3.51 | 44.9 |