Franklin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.6 °C (low) to 25.9 °C (high). Annual precipitation averages 1039.1 Millimeters. Franklin is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °C | 15.7 °C | 90.68 mm |
| February | 5.8 °C | 17.8 °C | 76.96 mm |
| March | 8.9 °C | 21.6 °C | 89.66 mm |
| April | 13.1 °C | 25.7 °C | 77.47 mm |
| May | 18.1 °C | 29.3 °C | 121.67 mm |
| June | 21.7 °C | 32.8 °C | 88.14 mm |
| July | 23.1 °C | 35.1 °C | 45.21 mm |
| August | 22.6 °C | 35.6 °C | 75.69 mm |
| September | 19.5 °C | 32.2 °C | 80.01 mm |
| October | 14 °C | 27.1 °C | 111.76 mm |
| November | 8.6 °C | 20.9 °C | 84.07 mm |
| December | 4.6 °C | 16.4 °C | 97.79 mm |
| Annual | 13.6 °C | 25.9 °C | 1039.11 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |