Hillsboro, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50 °F (low) to 71.5 °F (high). Annual precipitation averages 59.1 Inches. Hillsboro is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.1 °F | 50.4 °F | 5.45 in. |
| February | 33.8 °F | 54.7 °F | 5.52 in. |
| March | 40.8 °F | 63.4 °F | 5.43 in. |
| April | 48.8 °F | 72.0 °F | 5.31 in. |
| May | 58.2 °F | 79.6 °F | 4.89 in. |
| June | 66.0 °F | 86.6 °F | 4.63 in. |
| July | 69.3 °F | 88.9 °F | 4.99 in. |
| August | 67.9 °F | 88.8 °F | 4.22 in. |
| September | 61.6 °F | 84.3 °F | 4.24 in. |
| October | 49.7 °F | 74.0 °F | 3.82 in. |
| November | 39.0 °F | 62.2 °F | 4.41 in. |
| December | 33.6 °F | 53.2 °F | 6.2 in. |
| Annual | 50 °F | 71.5 °F | 59.11 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |