Hartford, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55 °F (low) to 77.4 °F (high). Annual precipitation averages 60.5 Inches. Hartford is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.9 °F | 60.4 °F | 5.05 in. |
| February | 40.9 °F | 64.1 °F | 5.34 in. |
| March | 46.5 °F | 71.3 °F | 5.53 in. |
| April | 53.3 °F | 77.7 °F | 5.02 in. |
| May | 62.0 °F | 85.1 °F | 4.08 in. |
| June | 69.4 °F | 89.5 °F | 5.55 in. |
| July | 71.7 °F | 91.2 °F | 6.27 in. |
| August | 71.1 °F | 90.4 °F | 5.7 in. |
| September | 66.6 °F | 87.3 °F | 5.01 in. |
| October | 55.7 °F | 79.2 °F | 3.26 in. |
| November | 44.9 °F | 69.5 °F | 4.46 in. |
| December | 40.4 °F | 62.5 °F | 5.23 in. |
| Annual | 55 °F | 77.4 °F | 60.5 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |