Slayden, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 20.5 °C (high). Annual precipitation averages 1375.2 Millimeters. Slayden 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 | -2.5 °C | 8.1 °C | 109.98 mm |
| February | -1.1 °C | 10.6 °C | 120.14 mm |
| March | 3.2 °C | 15.8 °C | 131.57 mm |
| April | 8 °C | 21.3 °C | 128.27 mm |
| May | 13.3 °C | 25.3 °C | 147.83 mm |
| June | 17.7 °C | 29.1 °C | 104.65 mm |
| July | 19.5 °C | 30.8 °C | 116.08 mm |
| August | 18.8 °C | 30.8 °C | 89.66 mm |
| September | 14.9 °C | 27.7 °C | 97.03 mm |
| October | 8.6 °C | 21.8 °C | 101.6 mm |
| November | 2.9 °C | 15.3 °C | 99.57 mm |
| December | -0.7 °C | 9.6 °C | 128.78 mm |
| Annual | 8.6 °C | 20.5 °C | 1375.16 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 |