| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°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: | 63f - Delmarva Uplands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 19975 - Selbyville, DE | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 28 | 35 | 43 | 53 | 62 | 67 | 66 | 59 | 48 | 39 | 31 | 46 |
| Avg Max Temp (°F) | 45 | 47 | 55 | 65 | 73 | 82 | 86 | 85 | 79 | 69 | 59 | 50 | 66 |
| Avg Precip (In.) | 4 | 3.28 | 4.53 | 3.38 | 3.76 | 3.33 | 4.11 | 5.16 | 3.8 | 3.4 | 3.26 | 3.46 | 45.48 |