| 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. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 63e - Mid-Atlantic Flatwoods |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 23437 - Suffolk, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 29 | 36 | 44 | 54 | 62 | 67 | 65 | 59 | 46 | 38 | 31 | 46 |
| Avg Max Temp (°F) | 49 | 52 | 61 | 70 | 78 | 85 | 89 | 87 | 82 | 72 | 63 | 53 | 70 |
| Avg Precip (In.) | 4.37 | 3.4 | 4.41 | 3.37 | 4.05 | 3.73 | 5.2 | 5.22 | 4.82 | 3.89 | 3.08 | 3.37 | 48.91 |