South Lead Hill, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 20.6 °C (high). Annual precipitation averages 1207.3 Millimeters. South Lead Hill is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.2 °C | 7.9 °C | 73.66 mm |
| February | -2.4 °C | 10.6 °C | 73.15 mm |
| March | 1.9 °C | 15.6 °C | 116.33 mm |
| April | 6.9 °C | 20.8 °C | 134.87 mm |
| May | 12.4 °C | 24.9 °C | 125.22 mm |
| June | 17.4 °C | 29.6 °C | 101.35 mm |
| July | 19.4 °C | 32.1 °C | 102.36 mm |
| August | 18.4 °C | 31.7 °C | 76.71 mm |
| September | 14.1 °C | 27.9 °C | 106.68 mm |
| October | 7.6 °C | 21.9 °C | 100.33 mm |
| November | 2.2 °C | 15.2 °C | 112.01 mm |
| December | -2.4 °C | 9.5 °C | 84.58 mm |
| Annual | 7.6 °C | 20.6 °C | 1207.25 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |