Whitesboro, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 21.4 °C (high). Annual precipitation averages 1451.9 Millimeters. Whitesboro 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 | -0.6 °C | 9.8 °C | 136.91 mm |
| February | 1 °C | 12.2 °C | 135.89 mm |
| March | 4.8 °C | 16.9 °C | 140.21 mm |
| April | 9.1 °C | 21.6 °C | 133.6 mm |
| May | 14.1 °C | 25.7 °C | 118.87 mm |
| June | 18.6 °C | 29.7 °C | 120.14 mm |
| July | 20.3 °C | 31.1 °C | 113.03 mm |
| August | 19.7 °C | 30.9 °C | 99.82 mm |
| September | 16.3 °C | 28.2 °C | 106.17 mm |
| October | 9.9 °C | 22.6 °C | 88.14 mm |
| November | 4.1 °C | 16.1 °C | 114.05 mm |
| December | 1.2 °C | 11.4 °C | 145.03 mm |
| Annual | 9.9 °C | 21.4 °C | 1451.86 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |