Rossville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.5 °C (low) to 22.1 °C (high). Annual precipitation averages 1423.9 Millimeters. Rossville 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 | -0.7 °C | 9.6 °C | 110.24 mm |
| February | 1.1 °C | 12.3 °C | 120.65 mm |
| March | 5.3 °C | 17.3 °C | 143.26 mm |
| April | 10.1 °C | 22.7 °C | 148.08 mm |
| May | 15.5 °C | 26.8 °C | 137.41 mm |
| June | 19.9 °C | 30.9 °C | 113.03 mm |
| July | 21.8 °C | 32.6 °C | 113.79 mm |
| August | 20.9 °C | 32.4 °C | 85.34 mm |
| September | 16.8 °C | 29.3 °C | 91.69 mm |
| October | 10.2 °C | 23.5 °C | 106.43 mm |
| November | 4.4 °C | 16.8 °C | 110.74 mm |
| December | 1 °C | 11.3 °C | 143.26 mm |
| Annual | 10.5 °C | 22.1 °C | 1423.92 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |