Crossville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 21 °C (high). Annual precipitation averages 1436.9 Millimeters. Crossville 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 | -0.9 °C | 9.5 °C | 135.13 mm |
| February | 0.8 °C | 11.9 °C | 130.05 mm |
| March | 4.6 °C | 16.6 °C | 138.43 mm |
| April | 8.9 °C | 21.2 °C | 132.08 mm |
| May | 13.8 °C | 25.3 °C | 118.62 mm |
| June | 18.3 °C | 29.3 °C | 118.36 mm |
| July | 19.9 °C | 30.8 °C | 110.74 mm |
| August | 19.3 °C | 30.4 °C | 99.31 mm |
| September | 16 °C | 27.7 °C | 106.43 mm |
| October | 9.6 °C | 22.2 °C | 87.12 mm |
| November | 3.8 °C | 15.8 °C | 113.79 mm |
| December | 1 °C | 11.2 °C | 146.81 mm |
| Annual | 9.6 °C | 21 °C | 1436.87 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |