| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 63b - Chesapeake-Pamlico Lowlands and Tidal Marshes |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 23417 - Onancock, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 31 | 38 | 45 | 55 | 64 | 69 | 68 | 62 | 50 | 42 | 34 | 49 |
| Avg Max Temp (°F) | 47 | 49 | 57 | 66 | 75 | 82 | 87 | 85 | 80 | 70 | 60 | 51 | 67 |
| Avg Precip (In.) | 3.86 | 3.26 | 4.47 | 3.05 | 3.53 | 3.09 | 4.31 | 4.01 | 3.61 | 3.32 | 3.06 | 3.29 | 42.85 |