Dickson, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 20.5 °C (high). Annual precipitation averages 1387.6 Millimeters. Dickson 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 | 8.3 °C | 109.22 mm |
| February | -0.8 °C | 10.8 °C | 124.21 mm |
| March | 3.4 °C | 15.9 °C | 132.08 mm |
| April | 8.1 °C | 21.6 °C | 128.52 mm |
| May | 13.4 °C | 25.3 °C | 152.65 mm |
| June | 17.7 °C | 28.9 °C | 102.11 mm |
| July | 19.5 °C | 30.6 °C | 119.38 mm |
| August | 18.8 °C | 30.6 °C | 93.73 mm |
| September | 15 °C | 27.4 °C | 95.5 mm |
| October | 8.8 °C | 21.8 °C | 102.11 mm |
| November | 3.2 °C | 15.3 °C | 97.28 mm |
| December | -0.4 °C | 9.6 °C | 130.81 mm |
| Annual | 8.7 °C | 20.5 °C | 1387.6 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 |