Rockford, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21 °C (high). Annual precipitation averages 1364.5 Millimeters. Rockford is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.8 °C | 8.8 °C | 127 mm |
| February | -0.1 °C | 11.3 °C | 122.43 mm |
| March | 3.4 °C | 16.2 °C | 128.52 mm |
| April | 8.2 °C | 21.4 °C | 125.48 mm |
| May | 13.4 °C | 25.8 °C | 105.92 mm |
| June | 18 °C | 29.7 °C | 112.01 mm |
| July | 20.2 °C | 31.3 °C | 139.45 mm |
| August | 19.6 °C | 31 °C | 85.85 mm |
| September | 16.1 °C | 28.3 °C | 93.22 mm |
| October | 9.1 °C | 22.3 °C | 80.77 mm |
| November | 2.8 °C | 15.7 °C | 108.2 mm |
| December | 0.1 °C | 10.7 °C | 135.64 mm |
| Annual | 9.1 °C | 21 °C | 1364.49 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |