Swifton, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 21.2 °C (high). Annual precipitation averages 1258.3 Millimeters. Swifton 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 | -1.5 °C | 7.9 °C | 92.96 mm |
| February | 0.2 °C | 10.6 °C | 97.54 mm |
| March | 4.6 °C | 15.9 °C | 115.82 mm |
| April | 9.8 °C | 21.6 °C | 135.38 mm |
| May | 15.4 °C | 26.4 °C | 130.56 mm |
| June | 20 °C | 30.9 °C | 87.38 mm |
| July | 21.9 °C | 32.5 °C | 94.23 mm |
| August | 20.7 °C | 32 °C | 90.17 mm |
| September | 16.3 °C | 28.7 °C | 86.87 mm |
| October | 9.8 °C | 23.1 °C | 100.84 mm |
| November | 4.2 °C | 15.3 °C | 112.78 mm |
| December | 0.2 °C | 9.4 °C | 113.79 mm |
| Annual | 10.1 °C | 21.2 °C | 1258.32 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |