| 2023 Hardiness Zone: | 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 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: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 19951 - Harbeson, 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) | 44 | 46 | 54 | 64 | 73 | 82 | 86 | 85 | 79 | 68 | 58 | 49 | 66 |
| Avg Precip (In.) | 3.99 | 3.19 | 4.47 | 3.46 | 3.87 | 3.27 | 3.97 | 5.25 | 3.83 | 3.39 | 3.28 | 3.54 | 45.51 |