Palmersville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 20.4 °C (high). Annual precipitation averages 1373.4 Millimeters. Palmersville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °C | 7.3 °C | 103.38 mm |
| February | -1.1 °C | 9.8 °C | 111.76 mm |
| March | 3.3 °C | 15.2 °C | 129.03 mm |
| April | 8.6 °C | 20.9 °C | 133.1 mm |
| May | 14.1 °C | 25.6 °C | 146.05 mm |
| June | 18.6 °C | 29.6 °C | 117.6 mm |
| July | 20.4 °C | 31.3 °C | 108.46 mm |
| August | 19.3 °C | 31.2 °C | 86.11 mm |
| September | 15.1 °C | 27.9 °C | 96.52 mm |
| October | 8.6 °C | 21.8 °C | 96.77 mm |
| November | 3 °C | 14.8 °C | 113.54 mm |
| December | -0.9 °C | 9.1 °C | 131.06 mm |
| Annual | 8.9 °C | 20.4 °C | 1373.38 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |