Chatham, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.2 °F (low) to 68.5 °F (high). Annual precipitation averages 47.5 Inches. Chatham is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.0 °F | 47.9 °F | 4.0 in. |
| February | 27.8 °F | 51.7 °F | 2.87 in. |
| March | 34.2 °F | 59.7 °F | 4.0 in. |
| April | 43.3 °F | 69.8 °F | 3.86 in. |
| May | 53.1 °F | 76.6 °F | 4.43 in. |
| June | 61.4 °F | 83.6 °F | 4.28 in. |
| July | 66.0 °F | 87.1 °F | 4.32 in. |
| August | 64.5 °F | 85.5 °F | 4.09 in. |
| September | 57.7 °F | 79.5 °F | 4.91 in. |
| October | 45.0 °F | 70.0 °F | 3.48 in. |
| November | 34.1 °F | 60.1 °F | 3.5 in. |
| December | 28.9 °F | 50.9 °F | 3.71 in. |
| Annual | 45.2 °F | 68.5 °F | 47.45 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |