Cardiff, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.4 °F (low) to 74.6 °F (high). Annual precipitation averages 58.5 Inches. Cardiff 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 | 31.9 °F | 54.6 °F | 5.43 in. |
| February | 34.7 °F | 58.9 °F | 5.4 in. |
| March | 41.5 °F | 67.2 °F | 5.81 in. |
| April | 48.5 °F | 75.5 °F | 5.2 in. |
| May | 57.8 °F | 82.3 °F | 4.6 in. |
| June | 65.7 °F | 88.4 °F | 4.82 in. |
| July | 69.0 °F | 91.4 °F | 5.04 in. |
| August | 68.3 °F | 91.0 °F | 4.15 in. |
| September | 62.3 °F | 86.5 °F | 4.51 in. |
| October | 50.1 °F | 76.4 °F | 3.45 in. |
| November | 39.7 °F | 65.4 °F | 4.7 in. |
| December | 34.9 °F | 57.0 °F | 5.39 in. |
| Annual | 50.4 °F | 74.6 °F | 58.5 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |