Lafayette, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 20.3 °C (high). Annual precipitation averages 1419.9 Millimeters. Lafayette is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.2 °C | 7.2 °C | 113.03 mm |
| February | -0.4 °C | 9.8 °C | 121.41 mm |
| March | 3.4 °C | 14.8 °C | 132.08 mm |
| April | 8.7 °C | 21 °C | 126.49 mm |
| May | 13.9 °C | 25.3 °C | 145.29 mm |
| June | 18.4 °C | 29.5 °C | 115.06 mm |
| July | 20.1 °C | 31.3 °C | 138.94 mm |
| August | 19.3 °C | 31 °C | 96.52 mm |
| September | 15.7 °C | 27.7 °C | 102.62 mm |
| October | 9.2 °C | 21.8 °C | 92.96 mm |
| November | 3.5 °C | 14.7 °C | 101.09 mm |
| December | 0 °C | 9.2 °C | 134.37 mm |
| Annual | 9.1 °C | 20.3 °C | 1419.86 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |