Franklin, North Carolina has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 6.6 °C (low) to 20.2 °C (high). Annual precipitation averages 1417.6 Millimeters. Franklin is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 9.4 °C | 136.4 mm |
| February | -1.8 °C | 11.6 °C | 118.87 mm |
| March | 1.3 °C | 15.9 °C | 129.29 mm |
| April | 5.4 °C | 20.8 °C | 126.75 mm |
| May | 10.4 °C | 24.4 °C | 113.54 mm |
| June | 14.9 °C | 27.7 °C | 125.48 mm |
| July | 17.1 °C | 29.3 °C | 108.2 mm |
| August | 16.6 °C | 28.7 °C | 118.11 mm |
| September | 13.3 °C | 26.2 °C | 111.76 mm |
| October | 6.6 °C | 21.3 °C | 84.84 mm |
| November | 0.6 °C | 15.8 °C | 111.25 mm |
| December | -1.6 °C | 10.9 °C | 133.1 mm |
| Annual | 6.6 °C | 20.2 °C | 1417.59 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |