Arial, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 22.2 °C (high). Annual precipitation averages 1431.5 Millimeters. Arial 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.8 °C | 11.3 °C | 130.05 mm |
| February | 0.7 °C | 13.6 °C | 113.28 mm |
| March | 4.3 °C | 17.6 °C | 125.22 mm |
| April | 8.6 °C | 22.7 °C | 117.35 mm |
| May | 13.8 °C | 26.6 °C | 103.12 mm |
| June | 18.2 °C | 30.2 °C | 123.19 mm |
| July | 20.2 °C | 32.1 °C | 124.71 mm |
| August | 19.8 °C | 31.1 °C | 138.94 mm |
| September | 16.5 °C | 28.2 °C | 110.74 mm |
| October | 9.7 °C | 22.8 °C | 103.12 mm |
| November | 3.7 °C | 17.1 °C | 106.68 mm |
| December | 1.1 °C | 12.7 °C | 135.13 mm |
| Annual | 9.7 °C | 22.2 °C | 1431.53 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |