Cross Plains, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 20.2 °C (high). Annual precipitation averages 1309.4 Millimeters. Cross Plains 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.8 °C | 7.2 °C | 101.6 mm |
| February | -1.2 °C | 9.8 °C | 114.3 mm |
| March | 2.9 °C | 14.8 °C | 120.14 mm |
| April | 7.9 °C | 20.6 °C | 125.98 mm |
| May | 13.5 °C | 25.1 °C | 136.14 mm |
| June | 18.1 °C | 29.3 °C | 108.71 mm |
| July | 20 °C | 31.2 °C | 107.95 mm |
| August | 19.1 °C | 30.9 °C | 90.93 mm |
| September | 15.1 °C | 27.8 °C | 94.74 mm |
| October | 8.7 °C | 21.7 °C | 92.96 mm |
| November | 2.9 °C | 14.7 °C | 91.95 mm |
| December | -0.6 °C | 9.1 °C | 123.95 mm |
| Annual | 8.6 °C | 20.2 °C | 1309.35 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |