| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 65m - Rolling Coastal Plain |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 23116 - Mechanicsville, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 28 | 36 | 44 | 53 | 62 | 67 | 65 | 59 | 46 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 46 | 50 | 60 | 70 | 77 | 84 | 88 | 86 | 80 | 70 | 60 | 50 | 68 |
| Avg Precip (In.) | 3.73 | 3.13 | 4.17 | 3.2 | 4.09 | 3.47 | 4.42 | 3.98 | 4.04 | 3.55 | 3.25 | 3.26 | 44.29 |