| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°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 23438 - Suffolk, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 30 | 37 | 45 | 54 | 63 | 67 | 66 | 60 | 48 | 39 | 32 | 47 |
| Avg Max Temp (°F) | 49 | 52 | 60 | 70 | 77 | 85 | 88 | 87 | 81 | 71 | 62 | 53 | 70 |
| Avg Precip (In.) | 4.37 | 3.51 | 4.43 | 3.36 | 4.06 | 3.84 | 5.2 | 5.18 | 4.79 | 3.81 | 3.1 | 3.38 | 49.04 |