Lynnville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.3 °C (high). Annual precipitation averages 1515.6 Millimeters. Lynnville 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 | -2.3 °C | 9.1 °C | 124.71 mm |
| February | -0.7 °C | 11.7 °C | 138.68 mm |
| March | 3 °C | 16.4 °C | 147.07 mm |
| April | 7.2 °C | 21.6 °C | 134.11 mm |
| May | 12.6 °C | 25.9 °C | 126.49 mm |
| June | 17.2 °C | 30 °C | 128.27 mm |
| July | 19.4 °C | 31.6 °C | 121.16 mm |
| August | 18.6 °C | 31.4 °C | 114.81 mm |
| September | 14.5 °C | 28.5 °C | 119.38 mm |
| October | 7.7 °C | 22.5 °C | 95 mm |
| November | 2.1 °C | 16 °C | 110.24 mm |
| December | -0.9 °C | 10.5 °C | 155.7 mm |
| Annual | 8.2 °C | 21.3 °C | 1515.62 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |