Onycha, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.3 °F (low) to 77.9 °F (high). Annual precipitation averages 61 Inches. Onycha is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.8 °F | 60.4 °F | 5.0 in. |
| February | 41.3 °F | 64.9 °F | 5.08 in. |
| March | 47.0 °F | 71.6 °F | 5.3 in. |
| April | 53.6 °F | 78.2 °F | 4.94 in. |
| May | 62.1 °F | 85.3 °F | 4.39 in. |
| June | 69.5 °F | 90.1 °F | 6.24 in. |
| July | 71.9 °F | 92.0 °F | 6.8 in. |
| August | 71.3 °F | 91.4 °F | 5.64 in. |
| September | 66.7 °F | 88.1 °F | 4.77 in. |
| October | 55.9 °F | 79.7 °F | 3.65 in. |
| November | 45.2 °F | 69.9 °F | 4.2 in. |
| December | 40.9 °F | 62.7 °F | 4.96 in. |
| Annual | 55.3 °F | 77.9 °F | 60.97 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |