Penton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 23.4 °C (high). Annual precipitation averages 1408.2 Millimeters. Penton 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 | 0.1 °C | 13 °C | 135.13 mm |
| February | 1.7 °C | 15.2 °C | 134.62 mm |
| March | 5 °C | 19.6 °C | 138.18 mm |
| April | 8.8 °C | 23.7 °C | 120.14 mm |
| May | 14 °C | 27.6 °C | 105.16 mm |
| June | 18.3 °C | 30.8 °C | 116.84 mm |
| July | 20.3 °C | 32.3 °C | 130.05 mm |
| August | 19.9 °C | 31.8 °C | 103.12 mm |
| September | 16.7 °C | 29.3 °C | 95 mm |
| October | 10.2 °C | 24.3 °C | 85.09 mm |
| November | 4.3 °C | 18.7 °C | 104.65 mm |
| December | 1.6 °C | 14.3 °C | 140.21 mm |
| Annual | 10.1 °C | 23.4 °C | 1408.19 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 |