Franklin, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 21.3 °C (high). Annual precipitation averages 1259.1 Millimeters. Franklin 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 | -3.5 °C | 8.4 °C | 86.11 mm |
| February | -1.8 °C | 11.1 °C | 87.88 mm |
| March | 2.6 °C | 16.1 °C | 119.89 mm |
| April | 7.6 °C | 21.8 °C | 136.91 mm |
| May | 13 °C | 25.9 °C | 133.35 mm |
| June | 17.8 °C | 30.5 °C | 90.42 mm |
| July | 19.9 °C | 32.8 °C | 99.31 mm |
| August | 18.9 °C | 32.6 °C | 92.71 mm |
| September | 14.6 °C | 28.6 °C | 95.25 mm |
| October | 7.9 °C | 22.6 °C | 97.28 mm |
| November | 2.3 °C | 15.5 °C | 118.11 mm |
| December | -1.8 °C | 9.8 °C | 101.85 mm |
| Annual | 8.1 °C | 21.3 °C | 1259.07 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |