Arley, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 21.9 °C (high). Annual precipitation averages 1567.7 Millimeters. Arley is located in USDA Plant Hardiness Zone 7b. 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 | -1.3 °C | 10.6 °C | 149.35 mm |
| February | 0.5 °C | 12.9 °C | 147.83 mm |
| March | 4.2 °C | 17.7 °C | 147.32 mm |
| April | 8.6 °C | 22.2 °C | 142.49 mm |
| May | 13.8 °C | 26.2 °C | 134.37 mm |
| June | 18.2 °C | 29.9 °C | 130.05 mm |
| July | 20 °C | 31.4 °C | 122.94 mm |
| August | 19.5 °C | 31.3 °C | 106.43 mm |
| September | 16.2 °C | 28.8 °C | 110.24 mm |
| October | 9.3 °C | 23.1 °C | 101.85 mm |
| November | 3.4 °C | 16.8 °C | 114.81 mm |
| December | 0.6 °C | 12 °C | 160.02 mm |
| Annual | 9.4 °C | 21.9 °C | 1567.7 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |