| 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: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 19930 - Bethany Beach, 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 | 49 | 40 | 32 | 47 |
| Avg Max Temp (°F) | 44 | 46 | 54 | 63 | 72 | 80 | 85 | 84 | 79 | 68 | 58 | 49 | 65 |
| Avg Precip (In.) | 3.97 | 3.21 | 4.46 | 3.47 | 3.82 | 3.21 | 3.95 | 4.98 | 3.71 | 3.36 | 3.29 | 3.55 | 44.98 |