Twin, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 22.5 °C (high). Annual precipitation averages 1570.5 Millimeters. Twin 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 | -1.2 °C | 10.9 °C | 145.03 mm |
| February | 0.6 °C | 13.6 °C | 148.59 mm |
| March | 4.3 °C | 18.4 °C | 138.43 mm |
| April | 8.7 °C | 22.9 °C | 149.1 mm |
| May | 13.9 °C | 26.9 °C | 144.53 mm |
| June | 18.4 °C | 30.5 °C | 126.49 mm |
| July | 20.3 °C | 32.1 °C | 126.49 mm |
| August | 19.8 °C | 32.2 °C | 111 mm |
| September | 16.1 °C | 29.4 °C | 102.87 mm |
| October | 9.3 °C | 23.8 °C | 99.57 mm |
| November | 3.3 °C | 17.3 °C | 119.63 mm |
| December | 0.5 °C | 12.4 °C | 158.75 mm |
| Annual | 9.5 °C | 22.5 °C | 1570.48 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 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 |