Fort Payne, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9 °C (low) to 21.8 °C (high). Annual precipitation averages 1469.1 Millimeters. Fort Payne is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 10.3 °C | 141.48 mm |
| February | 0.3 °C | 12.6 °C | 137.16 mm |
| March | 3.7 °C | 17.3 °C | 144.78 mm |
| April | 7.7 °C | 22.1 °C | 127.51 mm |
| May | 12.9 °C | 26.2 °C | 121.67 mm |
| June | 17.8 °C | 30 °C | 112.01 mm |
| July | 19.7 °C | 31.4 °C | 119.13 mm |
| August | 19.2 °C | 31.4 °C | 96.52 mm |
| September | 15.7 °C | 28.8 °C | 113.03 mm |
| October | 9.2 °C | 23.2 °C | 92.71 mm |
| November | 3.1 °C | 16.7 °C | 119.38 mm |
| December | 0.4 °C | 11.9 °C | 143.76 mm |
| Annual | 9 °C | 21.8 °C | 1469.14 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |