Petersburg, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.6 °F (low) to 70.3 °F (high). Annual precipitation averages 48.1 Inches. Petersburg is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.2 °F | 49.4 °F | 3.36 in. |
| February | 29.5 °F | 52.8 °F | 2.67 in. |
| March | 35.9 °F | 60.4 °F | 3.94 in. |
| April | 45.4 °F | 71.1 °F | 3.76 in. |
| May | 55.4 °F | 78.1 °F | 3.82 in. |
| June | 63.9 °F | 85.6 °F | 4.57 in. |
| July | 68.3 °F | 89.8 °F | 5.18 in. |
| August | 66.5 °F | 87.9 °F | 4.91 in. |
| September | 60.5 °F | 82.0 °F | 5.12 in. |
| October | 47.9 °F | 71.8 °F | 4.02 in. |
| November | 37.7 °F | 61.8 °F | 3.17 in. |
| December | 31.6 °F | 52.7 °F | 3.54 in. |
| Annual | 47.6 °F | 70.3 °F | 48.06 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |