| 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 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: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 63f - Delmarva Uplands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 19968 - Milton, DE | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 27 | 35 | 43 | 53 | 62 | 67 | 65 | 59 | 47 | 38 | 31 | 46 |
| Avg Max Temp (°F) | 44 | 46 | 54 | 64 | 74 | 82 | 86 | 85 | 79 | 68 | 58 | 49 | 66 |
| Avg Precip (In.) | 3.99 | 3.15 | 4.45 | 3.47 | 3.91 | 3.28 | 3.93 | 5.1 | 3.88 | 3.41 | 3.26 | 3.53 | 45.36 |