Hissop, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 23.2 °C (high). Annual precipitation averages 1480.8 Millimeters. Hissop 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 12.9 °C | 145.29 mm |
| February | 2.4 °C | 15.4 °C | 141.22 mm |
| March | 5.8 °C | 19.8 °C | 144.27 mm |
| April | 9.7 °C | 23.8 °C | 131.57 mm |
| May | 14.4 °C | 27.3 °C | 109.22 mm |
| June | 18.7 °C | 30.6 °C | 118.62 mm |
| July | 20.7 °C | 32.1 °C | 131.83 mm |
| August | 20.3 °C | 31.6 °C | 118.11 mm |
| September | 17.2 °C | 28.9 °C | 98.55 mm |
| October | 10.8 °C | 23.9 °C | 84.58 mm |
| November | 4.9 °C | 18.4 °C | 114.3 mm |
| December | 2.3 °C | 14 °C | 143.26 mm |
| Annual | 10.7 °C | 23.2 °C | 1480.82 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |