Collierville, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 22.1 °C (high). Annual precipitation averages 1433.6 Millimeters. Collierville is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 9.5 °C | 109.47 mm |
| February | 1.1 °C | 12.3 °C | 121.92 mm |
| March | 5.3 °C | 17.2 °C | 148.08 mm |
| April | 10.2 °C | 22.6 °C | 149.86 mm |
| May | 15.6 °C | 26.9 °C | 136.91 mm |
| June | 19.9 °C | 31 °C | 115.06 mm |
| July | 21.9 °C | 32.6 °C | 115.06 mm |
| August | 21 °C | 32.4 °C | 84.58 mm |
| September | 17 °C | 29.4 °C | 91.44 mm |
| October | 10.3 °C | 23.4 °C | 107.7 mm |
| November | 4.6 °C | 16.7 °C | 111 mm |
| December | 1.1 °C | 11.2 °C | 142.49 mm |
| Annual | 10.6 °C | 22.1 °C | 1433.57 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |