Louisa, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.5 °F (low) to 67.9 °F (high). Annual precipitation averages 44.4 Inches. Louisa 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 | 24.6 °F | 46.0 °F | 3.05 in. |
| February | 26.2 °F | 49.2 °F | 2.74 in. |
| March | 32.8 °F | 57.5 °F | 3.67 in. |
| April | 42.9 °F | 69.3 °F | 3.4 in. |
| May | 52.3 °F | 76.3 °F | 4.07 in. |
| June | 61.3 °F | 84.1 °F | 4.34 in. |
| July | 65.6 °F | 88.1 °F | 4.2 in. |
| August | 64.1 °F | 86.4 °F | 3.72 in. |
| September | 57.2 °F | 80.2 °F | 4.51 in. |
| October | 44.6 °F | 69.8 °F | 3.77 in. |
| November | 34.1 °F | 58.8 °F | 3.54 in. |
| December | 27.9 °F | 49.2 °F | 3.41 in. |
| Annual | 44.5 °F | 67.9 °F | 44.42 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 |